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1

ARM - XDC Documentation  

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Documentation External Data Center Order Data Description of External Data Streams Data Viewers and Plots (selected data sets) XDC Documentation XDC Documentation BNL's ARM Related...

2

ARM - Data Documentation  

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Documentation Documentation Policies, Plans, Descriptions Data Documentation Home Data Sharing and Distribution Policy Data Management and Documentation Plan Data Product Registration and Submission Reading netCDF and HDF Data Files Time in ARM netCDF Data Files Data Archive Documentation ARM Archive's Catalog of Data Streams (Updated monthly) Access to Historical ARM Data More on Understanding and Finding ARM Data Data Quality Problem Reporting Data Documentation A day of data files is bundled or processed into a single 24-hour file that represents a data stream, which is then stored at the ARM Data Archive. A day of data files is bundled or processed into a single 24-hour file that represents a data stream, which is then stored at the ARM Data Archive. Data collected through the routine operations and scientific field

3

ARM - Facility News Article  

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31, 2004 Facility News ARM Climate Research Facility Achieves User Milestone Three Months Ahead of Schedule Bookmark and Share Summary of the ARM Climate Research Facility User...

4

ARM - Facility News Article  

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Mapping It Up With Google Bookmark and Share "Thumbtacks" help ARM website users identify where the ARM sites are, including the ARM Mobile Facility deployments. "Thumbtacks" help...

5

ARM - Facility News Article  

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January 15, 2008 Facility News Future of User Facility Discussed at Fall Workshop As a national user facility, ARM is accessible to scientists around the globe for...

6

ARM - Facility News Article  

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February 15, 2008 Facility News User Group Provides Recommendations for Data Archive Improvements Routine data from the ARM sites and ARM-sponsored field campaigns are stored in...

7

ARM - Facility News Article  

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May 15, 2008 Facility News National User Facility Organization Meets to Discuss Progress and Ideas In late April, the ARM Technical Director attended an annual meeting of the...

8

ARM - Facility News Article  

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January 15, 2008 Facility News ARM Mobile Facility Completes Field Campaign in Germany Researchers will study severe precipitation events that occurred in August and October...

9

ARM - Facility News Article  

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15, 2005 [Facility News] 15, 2005 [Facility News] Website Integration Effort Delivers One-Stop Shopping for Data Bookmark and Share The ARM website was upgraded with a new capability in September. ARM data users now have the ability to order data using the data cart from www.arm.gov. The ARM website was upgraded with a new capability in September. ARM data users now have the ability to order data using the data cart from www.arm.gov. On September 27, a new way to browse and order ARM data became available on the ARM website after nine months of development. ARM infrastructure staff from three national laboratories-Brookhaven National Laboratory, Oak Ridge National Laboratory, and Pacific Northwest National Laboratory-teamed together to integrate the ARM web pages with the ARM

10

ARM - Facility News Archive  

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Amazon Rainforest Apr 25 Junior Rangers Enjoy Science Education at ARM Facility on Cape Cod Apr 24 A Twist on TwisterTM: ARM Educational Outreach Participates in Community Science...

11

ARM - Facility News Article  

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2, 2012 [Data Announcements, Facility News] 2, 2012 [Data Announcements, Facility News] Toolkit for ARM Radar Data Previewed at Workshop Bookmark and Share This data plot shows the height and north/south displacement of rain relative to the ARM Southern Great Plains site's Central Facility in Oklahoma. This retrieval used information from all three X-band scanning ARM precipitation radars at the SGP site and was performed using tools in the Python-ARM radar toolkit. Click on image to enlarge. This data plot shows the height and north/south displacement of rain relative to the ARM Southern Great Plains site's Central Facility in Oklahoma. This retrieval used information from all three X-band scanning ARM precipitation radars at the SGP site and was performed using tools in the Python-ARM radar toolkit. Click on image to enlarge.

12

ARM Climate Research Facility  

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TR-081.2 iii Abstract This report provides a short description of the Atmospheric Radiation Measurement (ARM) Climate Research Facility microwave radiometer (MWR) Retrieval...

13

ARM - Facility News Article  

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September 30, 2004 Facility News New Instrumentation on Proteus Aircraft Tested This fall, the ARM-Unmanned Aerospace Vehicle Program-specifically, the Proteus aircraft-is...

14

ARM - Facility News Article  

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features the familiar faces of Professor Polar Bear, Teacher Turtle, and PI Prairie Dog (each representing an ARM Climate Research Facility site), but now provides easier...

15

ARM - Facility News Article  

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22, 2011 [Facility News] 22, 2011 [Facility News] Request for Proposals Now Open Bookmark and Share The ARM Climate Research Facility is now accepting applications for use of an ARM mobile facility (AMF), the ARM aerial facility (AAF), and fixed sites. Proposals are welcome from all members of the scientific community for conducting field campaigns and scientific research using the ARM Facility, with availability as follows: AMF2 available December 2013 AMF1 available March 2015 AAF available between June and October 2013 Fixed sites available FY2013 Priority will be given to proposals that make comprehensive use of the ARM facilities and focus on long-term goals of the DOE Office of Biological and Environmental Research. Successful proposals will be supplied all operational and logistical resources (provided at no cost to the principal

16

ARM - Facility News Article  

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More Storage Space, Better Reliability Now at the ARM Data Management More Storage Space, Better Reliability Now at the ARM Data Management Facility Bookmark and Share To support the ever-increasing file storage needs of the ARM Data Management Facility (DMF) and ARM Engineering computers, a Network Appliance (NetApp®) file server with 2.68 terabytes, or 2.95 trillion bytes, of highly-reliable and extremely-fast, usable disk storage joined the DMF servers. The NetApp system performs nearly four times faster than the previous file server and is engineered for a higher degree of reliability-critical improvements needed to maintain uptime for ARM data availability at the DMF. A NetApp server increases ARM storage capacity and keeps the data flowing at the Data Management Facility. A NetApp server increases ARM storage capacity and keeps the data flowing

17

ARM - Facility News Article  

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4, 2013 [Facility News] 4, 2013 [Facility News] Work Cut Out for ARM Science Board Bookmark and Share With a new fixed site on the horizon in the Azores, a third ARM Mobile Facility gearing up for action in the Arctic, and more aircraft probes and sensors than scientists can shake a stick at, the ARM Facility continues to expand its considerable suite of assets for conducting climate research. Along with this impressive inventory comes the responsibility to ensure the Facility is supporting the highest-value science possible. Enter the ARM Science Board. This eleven-member group annually reviews complex proposals for use of the ARM mobile and aerial facilities. To maintain excellence and integrity in the review process, each member serves a renewable term of two years, with membership updated annually.

18

ARM - Facility News Article  

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April 30, 2008 [Facility News] April 30, 2008 [Facility News] ARM Outreach Materials Chosen for Earth Day Display in Washington DC Bookmark and Share Posters for the ARM Mobile Facility and ARM Education and Outreach were selected for the 2008 Earth Day display at DOE Headquarters. Posters for the ARM Mobile Facility and ARM Education and Outreach were selected for the 2008 Earth Day display at DOE Headquarters. Earth Day is officially honored each year on April 22, however, many groups sponsor activities throughout the entire month of April. At DOE Headquarters in Washington DC, two ARM posters were selected to join a poster display representing programs from numerous DOE offices. The display was featured in the Forrestal Building's ground-level and first floor lobby areas throughout the week of April 21. The posters were then displayed at

19

ARM - SGP Central Facility  

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Central Facility Central Facility SGP Related Links Facilities and Instruments Central Facility Boundary Facility Extended Facility Intermediate Facility Radiometric Calibration Facility Geographic Information ES&H Guidance Statement Operations Science Field Campaigns Visiting the Site Fact Sheet Images Information for Guest Scientists Contacts SGP Central Facility The ARM Climate Research Facility deploys specialized remote sensing instruments in a fixed location at the site to gather atmospheric data of unprecedented quality, consistency, and completeness. More than 30 instrument clusters have been placed around the site; the central facility; and the boundary, intermediate, and extended facilities. The locations for the instruments were chosen so that the measurements reflect conditions

20

ARM - Facility News Article  

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7, 2009 [Facility News] 7, 2009 [Facility News] Town Hall Meeting at AGU 2009 Fall Meeting Bookmark and Share ARM Climate Research Facility - New Measurement Capabilities for Climate Research Thursday, December 17, 6:15-7:15 pm, Moscone West Room 2002 American Recovery and Reinvestment Act American Recovery and Reinvestment Act Scientists from around the world use data from the ARM Climate Research Facility to study the interactions between clouds, aerosol and radiation. Through the American Recovery and Reinvestment Act of 2009, the DOE Office of Science received $1.2 billion, with $60 million allocated to the ARM Climate Research Facility. With these funds, ARM will purchase and deploy dual-frequency scanning cloud radars to all the ARM sites, enhance several sites with precipitation radars and energy flux measurement capabilities,

Note: This page contains sample records for the topic "facility documents arm" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

ARM - Facility News Article  

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March 22, 2007 [Facility News] March 22, 2007 [Facility News] GEWEX News Features Dust Data from ARM Mobile Facility Deployment Bookmark and Share Data from the recent deployment of the ARM Mobile Facility are featured in the February issue of GEWEX News. Data from the recent deployment of the ARM Mobile Facility are featured in the February issue of GEWEX News. The February 2007 issue (Vol. 17, No. 1) of GEWEX News features early results from special observing periods of the African Monsoon Mutidisciplinary Analysis, including data obtained by the ARM Mobile Facility (AMF). The AMF was stationed in the central Sahel from January through December 2006, with the primary facility at the Niamey airport, and an ancillary site in Banizoumbou. The AMF recorded a major dust storm that passed through the area in March, and combined with simultaneous satellite

22

ARM - Facility News Article  

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February 16, 2005 [Facility News] February 16, 2005 [Facility News] Mobile Facility Arrives Safe and Sound in Point Reyes Bookmark and Share Image - The ARM Mobile Facility in Point Reyes, California Image - The ARM Mobile Facility in Point Reyes, California Safe and sound at Point Reyes, the ARM Mobile Facility instrumentation is set up on the roof of a shelter until a fence is installed to keep out the curious local cattle. On February 9, the ARM Mobile Facility (AMF) withstood an accident on the way to its deployment location at Point Reyes, California. About an hour from its destination, the truck carrying the two AMF shelters packed with instrumentation and associated equipment swerved to avoid another vehicle and slid off the road and down a steep embankment. Emergency personnel soon

23

ARM - ARM Mobile Facility 1 Article  

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CenterARM Mobile Facility 1ARM Mobile Facility 1 Article CenterARM Mobile Facility 1ARM Mobile Facility 1 Article Media Contact Lynne Roeder lynne-dot-roeder-at-pnnl-dot-gov @armnewsteam Field Notes Blog Topics Field Notes89 AGU 3 AMIE 10 ARM Aerial Facility 2 ARM Mobile Facility 1 6 ARM Mobile Facility 2 47 BAECC 1 BBOP 4 MAGIC 12 MC3E 17 SGP 2 STORMVEX 29 TCAP 3 Search News Search Blog News Center All Categories What's this? Social Media Guidance News Center All Categories Features and Releases Facility News Field Notes Blog feed Events feed Employment Research Highlights Data Announcements Education News Archive What's this? Social Media Guidance January 13, 2011 [ARM Mobile Facility 1, Blog, Field Notes] AMF1 Azores Pack-up: Rust, Corrosion, and Wet Instruments Bookmark and Share PSP shows the harsh beating it took from the Atlantic mists.

24

ARM - Facility News Article  

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March 31, 2006 [Facility News] March 31, 2006 [Facility News] New Chief Scientist Leads Annual ARM Science Team Meeting Bookmark and Share Dr. Warren Wiscombe begins his presentation by introducing the members of his "Chief Scientist team"-a new approach for leading the ARM Science Team. Dr. Warren Wiscombe begins his presentation by introducing the members of his "Chief Scientist team"-a new approach for leading the ARM Science Team. With a new Chief Scientist at the helm, just over 300 ARM scientists and ARM infrastructure staff took part in the 16th ARM Science Team meeting held in Albuquerque, New Mexico, on March 27-31, 2006. After an initial day of focused meetings among the ARM Working Groups, Dr. David Thomassen, Acting Associate Director of DOE's Office of Biological and Environmental

25

ARM - Facility News Article  

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6, 2012 [Facility News] 6, 2012 [Facility News] News Tips from 2012 EGU General Assembly Bookmark and Share The ARM Facility is attending the 2012 European Geophysical Union General Assembly at the Austria Center in Vienna for the first time. The ARM Facility is attending the 2012 European Geophysical Union General Assembly at the Austria Center in Vienna for the first time. VIENNA - The U.S. Department of Energy's Atmospheric Radiation Measurement (ARM) Climate Research Facility is the world's most comprehensive outdoor laboratory and data archive for research related to atmospheric processes that affect Earth's climate. At the European Geophysical Union (EGU) General Assembly 2012 in Vienna, find out how scientists use the ARM Facility to study the interactions between clouds,

26

ARM - Facility News Article  

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April 7, 2011 [Facility News] April 7, 2011 [Facility News] Review Panel States ARM Facility "Without Peer" Bookmark and Share Every three years, DOE Office of Science user facilities undergo a review to evaluate their effectiveness in contributing to their respective science areas. The latest ARM Facility review was conducted in mid-February by a six-member review panel led by Minghua Zhang of Stony Brook University. Notably, in a debriefing following the review, the panel stated that ARM was a "world class facility without peer." The panel convened in Ponca City, Oklahoma, near ARM's Southern Great Plains site to conduct their review. Their first agenda item was an SGP site tour, which provided a realtime example of the scope and expertise of site operations and included a demonstration of the site's newly

27

ARM - Facility News Article  

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Review of ARM Infrastructure Completed Review of ARM Infrastructure Completed Bookmark and Share In May, the Department of Energy's Biological and Environmental Research Advisory Committee (BERAC) published findings and recommendations from their assessment of the effectiveness of ARM Climate Research Facility as a national scientific user facility. Based on a review of total user requests, the BERAC concluded that ARM was being effectively used by the broader scientific community, not just the ARM Program. They also stated that cost cutting measures had achieved the desired efficiency goals, but further cuts could impair the Facility's operations. The subcommittee reinforced the importance of the scientific impacts of this facility (including publications), and the value it has had for the international

28

ARM Aerial Facility  

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govSitesAerial Facility govSitesAerial Facility AAF Information Proposal Process Science (PDF) Baseline Instruments Campaign Instruments Instrumentation Workshop 2008 AAF Fact Sheet G-1 Fact Sheet Images Field Campaigns AAF Campaigns 2007 - UAV Campaigns 1993 - 2006, 2015 Other Aircraft Campaigns 1993 - 2010 AAF Contacts Rickey Petty DOE AAF Program Director Beat Schmid Technical Director ARM Aerial Facility Numerous instrumented aircraft participated in CLASIC, a cross-disciplinary interagency research effort. Numerous instrumented aircraft participated in CLASIC, a cross-disciplinary interagency research effort. As an integral measurement capability of the ARM Climate Research Facility, the ARM Aerial Facility (AAF) provides airborne measurements required to answer science questions proposed by the ARM Science Team and the external

29

ARM - Facility News Article  

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January 31, 2008 [Facility News] January 31, 2008 [Facility News] ARM Exhibit Showcases Continuous Data at American Meteorological Society Annual Meeting Bookmark and Share During the 88th annual AMS meeting, interested participants stop by the ARM exhibit where ARM researchers answered their questions. During the 88th annual AMS meeting, interested participants stop by the ARM exhibit where ARM researchers answered their questions. In January, ARM joined nearly 100 other exhibitors at the 88th American Meteorological Society annual meeting in New Orleans. This year's meeting was organized around the broad theme of "Enhancing the Connectivity between Research and Applications for the Benefit of Society." More than 3000 attendees from academia, the private sector, and government attended

30

ARM - Facility News Article  

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The Tale of the Tapes-No More Boxes of Data! The Tale of the Tapes-No More Boxes of Data! Bookmark and Share In October 1997, the ARM Program entered into a contract with the University of Alaska-Fairbanks to obtain image data covering the ARM Climate Research Facility's North Slope of Alaska (NSA) locale. Image data taken by an advanced very high resolution radiometer (AVHRR) are collected by a satellite receiver at Fairbanks and, up until February 2004, were stored on 4mm tapes. These boxes were then shipped by the boxful to the ARM Climate Research Facility External Data Center every six months. Once at the External Data Center, the data was processed into standard "hierarchical data format" or HDF files and transferred to the ARM Climate Research Facility Data Archive for use by ARM researchers. All data from

31

ARM - ARM Facility at EGU 2012  

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CenterARM Facility at EGU 2012 CenterARM Facility at EGU 2012 Media Contact Lynne Roeder lynne-dot-roeder-at-pnnl-dot-gov @armnewsteam Field Notes Blog Topics Field Notes89 AGU 3 AMIE 10 ARM Aerial Facility 2 ARM Mobile Facility 1 6 ARM Mobile Facility 2 47 BAECC 1 BBOP 4 MAGIC 12 MC3E 17 SGP 2 STORMVEX 29 TCAP 3 Search News Search Blog News Center All Categories What's this? Social Media Guidance News Center All Categories Features and Releases Facility News Field Notes Blog feed Events feed Employment Research Highlights Data Announcements Education News Archive What's this? Social Media Guidance ARM Facility at EGU 2012 At the 2012 European Geophysical Union General Assembly in Vienna, the ARM Climate Research Facility is hosting a booth located near the escalators in the Exhibition Entrance Hall. In their first time attending the assembly,

32

ARM - Facility News Article  

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March 31, 2009 [Facility News] March 31, 2009 [Facility News] New Sensors Installed for Cloud Radar Calibration at North Slope Bookmark and Share Located on the roof of the Guest Instrument Facility at the ARM Barrow site are the PARSIVEL (left) and POSS (right) instruments. Located on the roof of the Guest Instrument Facility at the ARM Barrow site are the PARSIVEL (left) and POSS (right) instruments. Cloud radars at the ARM sites provide important information about cloud properties and continue to evolve in providing climate researchers more complex data. This creates a greater need to know the absolute calibration of the radar reflectivity measurement. However, the large and immobile antenna for the millimeter wavelength cloud radar (MMCR) is impossible to point directly at a calibration target. At the ARM North Slope of Alaska

33

ARM - Facility News Article  

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May 22, 2008 Facility News ARM Staff Changes to Note Bookmark and Share Dr. Martin Stuefer, newest member of NSA team, and his plane. Dr. Martin Stuefer, newest member of NSA...

34

ARM Climate Research Facility  

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1 ARM Climate Research Facility Quarterly Value-Added Product Report Chitra Sivaraman August 2011 DISCLAIMER This report was prepared as an account of work sponsored by the U.S....

35

ARM Climate Research Facility  

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1 ARM Climate Research Facility Quarterly Value-Added Product Report Chitra Sivaraman June 2011 DISCLAIMER This report was prepared as an account of work sponsored by the U.S....

36

ARM - Facility News Article  

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Network for Barrow, AK, and Stillwater, OK, are Available Through the External Data Center Bookmark and Share The ARM Climate Research Facility is providing data in netCDF...

37

ARM Climate Research Facility  

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0 ARM Climate Research Facility Quarterly Value-Added Product Report C Sivaraman May 2013 DISCLAIMER This report was prepared as an account of work sponsored by the U.S....

38

ARM - Facility News Article  

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Records Set Again; New Process Enhances Reporting of User Facility Statistics The 2006 year-end ARM statistics included a spatial distribution of global (shown here; click map for...

39

ARM - Facility News Article  

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Preparations Underway for 2007 ARM Mobile Facility Deployment in Germany In the Black Forest region of Germany, the COPS field campaign will cover an area of about 700km2, as...

40

ARM - Facility News Article  

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5, 2009 [Facility News] 5, 2009 [Facility News] Turning a New Page with Facebook; Are You a Fan? Bookmark and Share Keep up with the ARM Climate Research Facilty via Facebook! Keep up with the ARM Climate Research Facilty via Facebook! As a scientific user facility for the global change research community, the ARM Climate Research Facility strives to provide data and share its climate observation capabilities with researchers around the world. In a continuing effort to reach new users, ARM is turning another page in its outreach strategy with a presence on Facebook. (You must have a Facebook account to access the page; if you don't have one, it is free and easy to create one.) Savvy Internet users of all ages increasingly use these types of communication tools to track topics of interest and share information with

Note: This page contains sample records for the topic "facility documents arm" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

ARM - Facility News Article  

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December 28, 2010 Facility News First Data from Darwin Raman Lidar Bookmark and Share Since 1996, the ARM Southern Great Plains site has maintained one of the few operational...

42

ARM - Facility News Article  

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April 30, 2008 [Facility News] April 30, 2008 [Facility News] Team Scouts Graciosa Island for 2009 Mobile Facility Deployment Site Bookmark and Share A location near the airport on the northern end of Graciosa Island was identified as an excellent location for operating the ARM Mobile Facility. Image source: Luis Miguens A location near the airport on the northern end of Graciosa Island was identified as an excellent location for operating the ARM Mobile Facility. Image source: Luis Miguens Indications from a scouting trip by the ARM Mobile Facility (AMF) science and operations management team are that an excellent site for the 2009 deployment may have been found. From April 8 through April 16, the team traveled to Graciosa Island in the Azores to scout sites for the Clouds, Aerosol, and Precipitation in the Marine Boundary Layer (CAP-MBL) field

43

ARM - Facility News Article  

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July 31, 2009 [Facility News] July 31, 2009 [Facility News] President of the Regional Government Speaks at Opening Ceremony for Mobile Facility in the Azores Bookmark and Share Highlighting the opening ceremony for the ARM Mobile Facility on Graciosa Island, Carlos César, President of the Regional Government of the Azores, signs a weather balloon while local media record the event. Photo by Mike Alsop. Highlighting the opening ceremony for the ARM Mobile Facility on Graciosa Island, Carlos César, President of the Regional Government of the Azores, signs a weather balloon while local media record the event. Photo by Mike Alsop. On June 30, officials from the Regional Government of the Azores recognized the deployment of the ARM Mobile Facility on Graciosa Island during an official opening ceremony held at the site. Notable among the participants

44

ARM - Facility News Article  

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8, 2011 [Facility News, Publications] 8, 2011 [Facility News, Publications] Journal Special Issue Includes Mobile Facility Data from Germany Bookmark and Share The ARM Mobile Facility operated in Heselbach, Germany, as part of the COPS surface network. The ARM Mobile Facility operated in Heselbach, Germany, as part of the COPS surface network. In 2007, the ARM Mobile Facility participated in one of the most ambitious field studies ever conducted in Europe-the Convective and Orographically Induced Precipitation Study (COPS). Now, 21 papers published in a special issue of the Quarterly Journal of the Royal Meteorological Society demonstrate that the data collected during COPS are providing new insight into: the key chemical and physical processes leading to convection initiation and to the modification of precipitation by orography;

45

ARM - Facility News Article  

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15, 2005 [Facility News] 15, 2005 [Facility News] Aging, Overworked Computer Network at SGP Gets Overhauled Bookmark and Share This aerial map of instruments deployed at the SGP Central Facility provides an indication of the computer resources needed to manage data at the site, let alone communicate with other ARM sites. This aerial map of instruments deployed at the SGP Central Facility provides an indication of the computer resources needed to manage data at the site, let alone communicate with other ARM sites. Established as the first ARM research facility in 1992, the Southern Great Plains (SGP) site in Oklahoma is the "old man on the block" when it comes to infrastructure. Though significant improvements have been made to facilities and equipment throughout the years, the computer network at the

46

ARM - Facility News Article  

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September 15, 2008 [Facility News] September 15, 2008 [Facility News] Global Earth Observations Portal Provides Gateway to ARM Data Bookmark and Share The GEOSS is simultaneously addressing nine areas of critical importance to society, ranging from managing energy resources and promoting sustainable agriculture to improving weather forecasts and responding to climate change and its impacts. The GEOSS is simultaneously addressing nine areas of critical importance to society, ranging from managing energy resources and promoting sustainable agriculture to improving weather forecasts and responding to climate change and its impacts. Data obtained at the ARM sites are freely available to users worldwide through the ARM Data Archive. In August, ARM added another entry point to its data collection by registering the ARM Program and Data Archive as

47

ARM - Facility News Article  

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18, 2006 [Facility News] 18, 2006 [Facility News] ARM External Data Center Celebrates Ten Years of Service Bookmark and Share External Data Center was recognized for 10 years of service External Data Center was recognized for 10 years of service In celebration of its tenth year of operation, the ARM External Data Center (XDC), which is managed by Brookhaven National Laboratory, was recently recognized for its outstanding contribution to the scientific user community. The XDC collects and processes data from other climate monitoring and research programs to supplement the data collected at the ARM sites. ARM provides these data from external sources because they are usually not easily accessible from their original source. ARM Program Director Wanda Ferrell presented XDC manager Richard Wagener

48

ARM - Facility News Article  

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31, 2006 [Facility News] 31, 2006 [Facility News] New Operations Status System Improves Tracking, Reporting Bookmark and Share Environmental conditions at the ARM sites, like this one in Alaska, contribute to the challenge of managing an extensive array of sophisticated instruments. Environmental conditions at the ARM sites, like this one in Alaska, contribute to the challenge of managing an extensive array of sophisticated instruments. With heavily instrumented research sites around the globe, the ARM faces a daunting operations and reporting challenge. To better track and report the status of the capabilities at these widely disbursed sites, ARM operations staff recently completed the development of a comprehensive Operations Status System (OSS). By serving as a central collection point for all ARM

49

ARM - Facility News Article  

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25, 2013 [Education, Facility News] 25, 2013 [Education, Facility News] Junior Rangers Enjoy Science Education at ARM Facility on Cape Cod Bookmark and Share Children and adults join in the balloon launch countdown at the ARM Mobile Facility site at Cape Cod National Seashore. Weather balloons are launched at regular intervals four times per day throughout the one-year campaign. Children and adults join in the balloon launch countdown at the ARM Mobile Facility site at Cape Cod National Seashore. Weather balloons are launched at regular intervals four times per day throughout the one-year campaign. School break means vacation, and around Cape Cod, that often means a trip to the seashore. On April 17, families looking for fun and educational outdoor activities spent several hours at Cape Cod National Seashore's

50

ARM - Facility News Article  

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30, 2005 [Facility News] 30, 2005 [Facility News] Coastal Clouds Field Campaign Takes Off in July Bookmark and Share The 2-channel NFOV gets careful attention as it joins the suite of instruments collecting data for the ARM Mobile Facility field campaign at Point Reyes National Seashore. The 2-channel NFOV gets careful attention as it joins the suite of instruments collecting data for the ARM Mobile Facility field campaign at Point Reyes National Seashore. Since March 2005, the ARM Mobile Facility (AMF) has been at Point Reyes National Seashore in northern California for the Marine Stratus Radiation, Aerosol, and Drizzle Intensive Operational Period. The goals of this 6-month field campaign are to collect data from cloud/aerosol interactions and to improve understanding of cloud organization that is often associated

51

ARM - Facility News Article  

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W-Band Cloud Radar Added to ARM Mobile Facility in Africa W-Band Cloud Radar Added to ARM Mobile Facility in Africa Bookmark and Share Most of the WACR is mounted on top of one of the AMF shelters. The WACR computer and chiller (used to keep the WACR cool in temperatures up to 47 degrees C) are located in the shelter below the radar. Most of the WACR is mounted on top of one of the AMF shelters. The WACR computer and chiller (used to keep the WACR cool in temperatures up to 47 degrees C) are located in the shelter below the radar. A W-band ARM Cloud Radar (WACR) recently joined the suite of baseline capabilities offered by the ARM Mobile Facility (AMF). The term "W-band" refers to the specific radio frequency range of this radar, which is a 95 gigahertz pulse Doppler zenith pointing radar, providing profiles of cloud

52

ARM - Facility News Article  

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May 15, 2006 [Facility News] May 15, 2006 [Facility News] New Micropulse Lidars to Replace Old Ones; Deployments Begin at SGP Bookmark and Share A representative from Sigma Space Corporation demonstrates the operation of the new micropulse lidar to ARM instrument mentors and site operations technicians. A representative from Sigma Space Corporation demonstrates the operation of the new micropulse lidar to ARM instrument mentors and site operations technicians. On May 3, the first of seven new and upgraded micropulse lidars (MPLs) was deployed at the ARM Southern Great Plains (SGP) site's Central Facility. These seven identical systems (including one spare) will replace the existing MPLs deployed at facilities throughout the SGP site and include new polarization capability. The MPLs provide critical backscatter

53

ARM - Facility News Article  

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27, 2009 [Facility News] 27, 2009 [Facility News] Arrival of Recovery Act Funds Sets Wheels In Motion Bookmark and Share So that people can easily recognize the effects of the American Recovery and Reinvestment Act, all projects will be stamped with the Recovery Act logo. So that people can easily recognize the effects of the American Recovery and Reinvestment Act, all projects will be stamped with the Recovery Act logo. Through the American Recovery and Reinvestment Act of 2009 (aka stimulus), the Department of Energy's Office of Science received $1.2 billion. In late May, DOE released approximately $54 million-90 percent-of the $60 million allocated to the ARM Climate Research Facility. During the next 18 months, the ARM Climate Research Facility will purchase and deploy dual-frequency scanning cloud radars to all the ARM sites, enhance several

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ARM - Facility News Article  

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Mobile Facility Beta Testing Complete; System Headed to California Seashore Mobile Facility Beta Testing Complete; System Headed to California Seashore Bookmark and Share A key addition to the ARM Climate Research Facility scientific infrastructure is ready to roll...literally. In February, the ARM Mobile Facility (AMF) is being packed up and shipped from Richland, Washington, to the Point Reyes National Seashore north of San Francisco, California. There, it will be reassembled in preparation for its first deployment as part of a 6-month experiment to study the microphysical characteristics of marine stratus clouds, and in particular, marine stratus drizzle processes. Throughout the deployment, the AMF will accommodate aerosol observing equipment for National Oceanic and Atmospheric Administration (NOAA) researchers co-sponsored by ARM and the DOE Aerosol Science Program.

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ARM - Facility News Article  

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8, 2010 [Facility News] 8, 2010 [Facility News] Europeans Keen to Hear About Effects of Dust Using Data from Africa Bookmark and Share In 2006, the ARM Mobile Facility joined the AMMA project to obtain data for scientists to study the impact that airborne Saharan dust has on incoming solar radiation. This photo shows the sun setting through a dusty atmosphere near Niamey, Niger, where the mobile facility was deployed for one year. In 2006, the ARM Mobile Facility joined the AMMA project to obtain data for scientists to study the impact that airborne Saharan dust has on incoming solar radiation. This photo shows the sun setting through a dusty atmosphere near Niamey, Niger, where the mobile facility was deployed for one year. Researcher Xiaohong Liu from Pacific Northwest National Laboratory was

56

ARM Climate Research Facility  

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Recovery Act Recovery Act Learn about ARM's efforts. The Atmospheric Radiation Measurement (ARM) Climate Research Facility is a U.S. Department of Energy scientific user facility, providing data from strategically located in situ and remote sensing observatories around the world. [ Live Data Displays ] Featured Data 09.19.2013 New ARM Best Estimate Land Product Contains Critical Soil Quantities for Describing Land Properties 09.12.2013 Value-Added Product Estimates Planetary Boundary Layer Height from Radiosondes 08.29.2013 New Data Available for Precipitation Value-Added Product Feature12.30.2013 Pole Position: New Field Campaigns Explore Arctic and Antarctic Atmosphere Pole Position: New Field Campaigns Explore Arctic and Antarctic Atmosphere For the first time, ARM ventures to Antarctica for one of several newly

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ARM - Facility News Article  

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July 28, 2011 [Facility News] July 28, 2011 [Facility News] A Giant Lift for Arctic Climate Data Bookmark and Share A newly installed X-band scanning ARM precipitation radar operates from atop the Barrow Arctic Research Center in Alaska. A newly installed X-band scanning ARM precipitation radar operates from atop the Barrow Arctic Research Center in Alaska. Ushering in the first operational precipitation radar on the U.S. Arctic Coast, engineers completed acceptance testing for the new X-band scanning ARM precipitation radar (X-SAPR) on June 21 at its location atop the Barrow Arctic Research Center in Alaska. Data from the radar are transmitted through a wireless connection to the ARM site data system. With the radar up and running, signal returns on June 24 provided an indication of the

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ARM - Facility News Article  

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October 16, 2007 [Facility News] October 16, 2007 [Facility News] ARM Education and Outreach Program Awarded Funding by National Science Foundation Bookmark and Share Andrea Maestas, ARM Education and Outreach Coordinator, was part of a team awarded National Science Foundation funding to engage Native Alaskans in the geosciences through the WGBH Teachers' Domain website. Andrea Maestas, ARM Education and Outreach Coordinator, was part of a team awarded National Science Foundation funding to engage Native Alaskans in the geosciences through the WGBH Teachers' Domain website. In July 2007, the National Science Foundation awarded funding to a proposal developed by ARM Education and Outreach and WGBH Boston-public television's pre-eminent production house. The winning project, titled "Engaging Alaska Natives with the Geosciences," will add digital media and

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ARM - Facility News Article  

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January 3, 2011 [Facility News] January 3, 2011 [Facility News] Cloud Radar Overhauled and Renamed Bookmark and Share The KAZR (left) is being tested with a 2-meter antenna used with MMCRs at other ARM sites. This pre-operational test will help uncover any data anomalies prior to the KAZR being installed in its new home in the shelter on the right when it replaces the MMCR. The KAZR (left) is being tested with a 2-meter antenna used with MMCRs at other ARM sites. This pre-operational test will help uncover any data anomalies prior to the KAZR being installed in its new home in the shelter on the right when it replaces the MMCR. In mid-December 2010, a new Ka-band ARM zenith radar (KAZR) began a two-week pre-operational test alongside the ARM millimeter wavelength cloud radar (MMCR) at the Southern Great Plains site. This ushers in a new era

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ARM - Facility News Article  

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Southern Great Plains Site Hosts Gathering to Discuss ARM Instrumentation Southern Great Plains Site Hosts Gathering to Discuss ARM Instrumentation Bookmark and Share Field calibration of the rotating shadowband radiometer (RSS) is performed by the RSS instrument mentor (left) and a colleague from SGP operations. Field calibration of the rotating shadowband radiometer (RSS) is performed by the RSS instrument mentor (left) and a colleague from SGP operations. With research facilities around the globe, one of the biggest challenges faced by ARM is communication and consistent application of new information and instrument advances. In early August, about 45 ARM scientists and engineers gathered at the ARM Southern Great Plains site for a three-day interactive meeting to promote information exchange between instrument mentors and site operations personnel. Meeting participants included

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61

ARM - Facility News Article  

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Guest Instruments to Collect Aerosol Data During Coastal Field Campaign Guest Instruments to Collect Aerosol Data During Coastal Field Campaign Bookmark and Share The counter-flow virtual impactor (inset), which can characterize aerosol particles in cloud droplets, joins a number of other guest instruments at the ARM Mobile Facility deployment site at Point Reyes National Seashore in California. The counter-flow virtual impactor (inset), which can characterize aerosol particles in cloud droplets, joins a number of other guest instruments at the ARM Mobile Facility deployment site at Point Reyes National Seashore in California. The ARM Mobile Facility's (AMF's) inaugural field campaign, the Marine Stratus Radiation Aerosol and Drizzle (MASRAD) Intensive Operational Period, is well underway at Point Reyes National Seashore on the northern

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ARM - Facility News Article  

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April 24, 2013 [Education, Facility News] April 24, 2013 [Education, Facility News] A Twist on TwisterTM: ARM Educational Outreach Participates in Community Science Nights Bookmark and Share This week, the U.S. Department of Energy begins its National Science Bowl competition, a nationwide academic competition that tests students' knowledge in all areas of science. Created 22 years ago in 1991, the DOE National Science Bowl strives to encourage students to excel in mathematics and science and to pursue careers in these fields and is an important part of DOE's STEM (science, technology, engineering and math) education efforts today. The ARM Climate Research Facility supports STEM by participating in public science nights and developing climate related lesson plans to share at these events and via the ARM website.

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ARM - Facility News Article  

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CIMEL Sunphotometer Helps Researchers See the Light in Australia CIMEL Sunphotometer Helps Researchers See the Light in Australia Bookmark and Share A CIMEL sunphotometer, similar to this one in Tinga Tingana, Australia, will be installed at the ARM Climate Research Facility Darwin site. Photo courtesy of NASA Goddard Space Flight Center. A CIMEL sunphotometer, similar to this one in Tinga Tingana, Australia, will be installed at the ARM Climate Research Facility Darwin site. Photo courtesy of NASA Goddard Space Flight Center. Science collaborators at the Australian Bureau of Meteorology (BOM) and the Australian Commonwealth Scientific and Industry Research Organization (CSIRO) are using the ARM Climate Research Facility Darwin site in Australia to evaluate aerosol optical properties during the tropical dry season. As part of the Darwin Aerosol Intensive Operational Period (IOP), a

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ARM - Facility News Article  

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April 15, 2010 [Facility News] April 15, 2010 [Facility News] Second Phase of African Scientific Exchange Underway Bookmark and Share Left to right: Dr. Zewdu Segele and Hama Hamidou examine reflectivity measurements made by the W-band ARM cloud radar in Niamey during July 2006. Left to right: Dr. Zewdu Segele and Hama Hamidou examine reflectivity measurements made by the W-band ARM cloud radar in Niamey during July 2006. Continuing an international collaboration that began with the ARM Mobile Facility deployment to Niamey, Niger, in 2006, meteorologist Hama Hamidou from the University of Niamey recently arrived at the Cooperative Institute for Mesoscale Meteorological Studies at the University of Oklahoma for a six-month scientific exchange. Under the guidance of Dr. Zewdu Segele, a

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ARM - Facility News Article  

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ARM Climate Research Facility Communication Products Garner Awards in ARM Climate Research Facility Communication Products Garner Awards in Competition Bookmark and Share Entries in the Communicator Awards are judged by industry professionals who look for talents that exceed a high standard of excellence and work that serves as a benchmark for the industry. Entries in the Communicator Awards are judged by industry professionals who look for talents that exceed a high standard of excellence and work that serves as a benchmark for the industry. Trying to describe the ARM Climate Research Facility to an educated audience is hard enough; imagine explaining it to someone who knows next to nothing about atmospheric science! Judges of the 2005 Communicator Awards print media competition apparently got the message, as they gave awards to

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ARM - Facility News Article  

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, 2009 [Facility News] , 2009 [Facility News] Mobile Facility Begins Marine Cloud Study in the Azores Bookmark and Share Located next to the airport on Graciosa Island, the ARM Mobile Facility's comprehensive and sophisticated instrument suite will obtain atmospheric measurements from the marine boundary layer. Located next to the airport on Graciosa Island, the ARM Mobile Facility's comprehensive and sophisticated instrument suite will obtain atmospheric measurements from the marine boundary layer. Extended deployment will obtain seasonal statistics to improve climate models Today marks the beginning of a 20-month field campaign on Graciosa Island in the Azores to study the seasonal life cycle of marine clouds and how they modulate the global climate system. Sponsored by the U.S. Department

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ARM - Facility News Article  

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16, 2008 [Facility News] 16, 2008 [Facility News] Revised Convective Triggering Mechanism Improves Precipitation Forecast Bookmark and Share Example of Global Spectral Model (GSM) at the Japan Meteorological Agency (JMA). Example of Global Spectral Model (GSM) at the Japan Meteorological Agency (JMA). An improved convective triggering mechanism developed by ARM scientists based on ARM observations was implemented recently in the Global Spectral Model at the Japan Meteorological Agency (JMA) to improve surface precipitation forecasts. The revised triggering mechanism uses a dynamic convective available potential energy generation rate (DCAPE) to control the onset of deep convection. It assumes that deep convection occurs only when the large-scale dynamic forcing makes a positive

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ARM - Facility News Article  

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October 15, 2005 [Facility News] October 15, 2005 [Facility News] Room to Share-New Guest Facility Ready for Users at North Slope of Alaska Bookmark and Share In September, installation was completed on the new Guest Instrument Facility in Barrow to provide additional space and ease crowded conditions. In September, installation was completed on the new Guest Instrument Facility in Barrow to provide additional space and ease crowded conditions. To alleviate crowded conditions at its research facilities on the North Slope of Alaska (NSA) site in Barrow, ARM operations staff recently completed the installation of a new Guest Instrument Facility. Similar to the platform at the Atqasuk site, the facility consists of two insulated shipping containers mounted on pilings, with a mezzanine to accommodate

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ARM - Facility News Article  

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History Tool Records Changes to Datastreams History Tool Records Changes to Datastreams Bookmark and Share As the name implies, a "datastream" is a continuous record of a specific type of data that is collected and saved in a time series. Occasionally, modifications are needed to update or correct a datastream. Knowing the history of changes to a datastream is a critical issue for ARM data users. Recognizing this need, the ARM Data Management Facility (DMF) created a tool to record the history of every datastream for every instrument from every ARM site since the beginning of the ARM Program. The History of Datastream tool looks for changes to the data object design (DOD) files weekly and creates a history link for DODs that have changed. By selecting "history," users will have access to the old DOD file and a file outlining the differences.

70

ARM Climate Research Facility  

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banner banner Home | People | Site Index Atmospheric Radiation Measurement Climate Research Facility US Department of Energy About Science Campaigns Sites Instruments Measurements Data News Publications Education Become a User Recovery Act Mission FAQ Outreach Displays History Organization Participants Facility Statistics Forms Contacts Research Themes Research Highlights Journal Articles Collaborations Atmospheric System Research (ASR) ARM Science Team Meetings Propose a Campaign Submitting Proposals: Guidelines Featured Campaigns Campaign Data List of Campaigns Aerial Facility Eastern North Atlantic Mobile Facilities North Slope of Alaska Southern Great Plains Tropical Western Pacific Location Table Contacts Instrument Datastreams Value-Added Products PI Data Products Field Campaign Data Related Data

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ARM - Facility News Article  

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9, 2013 [Facility News] 9, 2013 [Facility News] ARM Facility Shares Return on Science Investments Bookmark and Share The Bolger Center-a former U.S. Postal Service training center-hosted the fourth annual ASR Science Team Meeting in March. The Bolger Center-a former U.S. Postal Service training center-hosted the fourth annual ASR Science Team Meeting in March. To quote Ben Franklin, "If a man empties his purse into his head, no man can take it away from him. An investment in knowledge always pays the best interest." ARM Climate Research Facility staff who attended the fourth annual Atmospheric System Research (ASR) Science Team Meeting in April received a healthy dose of interest in March! With over 350 attendees presenting nearly 250 posters, the wealth of atmospheric climate science knowledge

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ARM - Facility News Article  

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Annual Quality Improvement Inspections Take Place Annual Quality Improvement Inspections Take Place Bookmark and Share During the SGP site audit conducted in April 2005, a member of the Continuous Quality Improvement Program team is accompanied by a local jackrabbit at the Ringwood Extended Facility. During the SGP site audit conducted in April 2005, a member of the Continuous Quality Improvement Program team is accompanied by a local jackrabbit at the Ringwood Extended Facility. The Continuous Quality Improvement Program (CQIP) implemented by the ARM Program in 1998 requires annual audits and inspection visits to each of the ARM Climate Research Facility Southern Great Plains (SGP) site's 27 field facilities located in Oklahoma and Kansas. A small team of scientists and engineers conduct the inspections each year to evaluate the field

73

ARM - Facility News Article  

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New Backup Software Improves Processing, Reliability at Data Management New Backup Software Improves Processing, Reliability at Data Management Facility Bookmark and Share Real-time data from all three of the ARM Climate Research Facility sites (North Slope of Alaska, Southern Great Plains, and Tropical Western Pacific) are collected and processed at the ARM Climate Research Facility Data Management Facility (DMF) each day. Processing involves the application of algorithms for performing simple averaging routines, qualitative comparisons, or more complicated experimental calculations. With continual advances in computer technology, keeping up with the volume and pace of incoming data is a daunting challenge. And because the remote sites do not provide backups, reliable backups of these data at the DMF are critical. In addition, significant numbers of value-added datasets are

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ARM - Facility News Article  

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March 1, 2012 [Facility News] March 1, 2012 [Facility News] Arctic Storm Samples Show Relationship Between Sea Ice and Precipitation Over Land Bookmark and Share Walter Brower, Barrow site facilities manager for ARM, cleans the sampling surface in preparation for the next snow storm. Visible in the background is the site's automated weather balloon launcher. Walter Brower, Barrow site facilities manager for ARM, cleans the sampling surface in preparation for the next snow storm. Visible in the background is the site's automated weather balloon launcher. As an important component of Earth's climate system, sea ice has a particularly strong influence on the Arctic sea surface temperature, evaporation, and reflectivity, or "albedo." The critical relationship among sea ice, evaporation, and precipitation is linked to a number of

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ARM - Facility News Article  

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15, 2007 [Facility News] 15, 2007 [Facility News] Microwave Radiometers Put to the Test in Germany Bookmark and Share A 2-channel microwave radiometer (left) and a 12-channel microwave radiometer profiler (right) are part of a larger collection of instruments deployed at the ARM Mobile Facility site in Heselbach, Germany, in 2007. A 2-channel microwave radiometer (left) and a 12-channel microwave radiometer profiler (right) are part of a larger collection of instruments deployed at the ARM Mobile Facility site in Heselbach, Germany, in 2007. Microwave radiometers (MWRs) are instruments used to measure emissions of water vapor and liquid water molecules in the atmosphere at specific microwave frequencies. Different MWRs are used to measure various frequencies, but the accuracy of all their retrievals is somewhat suspect,

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ARM - Facility News Article  

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1, 2011 [Facility News] 1, 2011 [Facility News] Data from Field Campaign in Black Forest, Germany, are Red Hot Bookmark and Share During COPS, the ARM Mobile Facility operated in Heselbach, Germany, obtaining measurements encompassing the entire life cycle of precipitation. The AMF site also hosted a number of guest instruments for supplemental field campaigns throughout the deployment. During COPS, the ARM Mobile Facility operated in Heselbach, Germany, obtaining measurements encompassing the entire life cycle of precipitation. The AMF site also hosted a number of guest instruments for supplemental field campaigns throughout the deployment. A paper published in a special issue of the Quarterly Journal of the Royal Meteorological Society describing the scientific strategy, field phase, and

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ARM - Facility News Article  

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15, 2006 [Facility News] 15, 2006 [Facility News] Radar Wind Profiler Joins ARM Mobile Facility Instrument Suite Bookmark and Share This spring, a 915 MHz radar wind profiler (RWP) was successfully installed at the ARM Mobile Facility (AMF) site in Niamey, Niger, West Africa, for the remainder of the 1-year RADAGAST field campaign which started in January. The RWP will provide information about wind speed, wind direction, and wind shear, and also enable measurements of the turbulence in the lower part of the troposphere. This may be a key variable in determining the vertical distribution of dust in the experimental domain. Gradients in the radar's reflectivity spectrum may also help to provide continuous identification of the depth of the boundary layer in the summer months, when refractive gradients are likely to be maximized by low-level moisture.

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ARM - Facility News Article  

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April 30, 2006 [Facility News] April 30, 2006 [Facility News] Disdrometer Joins Tipping Bucket to Improve Precipitation Measurements Bookmark and Share At the SGP site, the disdrometer is installed near the site's main instrument cluster, approximately 50 feet east of the Central Facility. To avoid secondary splash contamination, the disdrometer's sensor cone is surrounded by splash-resistant material. At the SGP site, the disdrometer is installed near the site's main instrument cluster, approximately 50 feet east of the Central Facility. To avoid secondary splash contamination, the disdrometer's sensor cone is surrounded by splash-resistant material. This spring, a pair of new distrometers began collecting data at the ARM Southern Great Plains (SGP) site and the ARM Darwin site in the Tropical

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ARM - Facility News Article  

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December 3, 2004 [Facility News] December 3, 2004 [Facility News] First Deployment of ARM Mobile Facility to Occur on California Coast Bookmark and Share Image - Point Reyes Beach Image - Point Reyes Beach Point Reyes National Seashore, on the California coast north of San Francisco, has been identified as the official location for the first deployment of the DOE's Atmospheric Radiation Measurement (ARM) Mobile Facility (AMF). As part of a 6-month field campaign beginning in March 2005 to study the microphysical characteristics of marine stratus and, in particular, marine stratus drizzle processes, the AMF will provide a mature instrument system to help fill information gaps in the existing limited surveys of marine stratus microphysical structure. Marine stratus clouds are known to be susceptible to the byproducts of fossil fuel consumption, a

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ARM - Facility News Article  

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January 15, 2006 [Facility News] January 15, 2006 [Facility News] ARM Mobile Facility Begins Year-Long Deployment in Africa Bookmark and Share Beginning on January 9, the ARM Mobile Facility began officially collecting atmospheric data from a location at the airport in Niamey, Niger, Africa. As part of the RADAGAST field campaign, the AMF will measure the effects of absorbing aerosols from desert dust in the dry season, and the effects of deep convective clouds and associated moisture loadings on the transmission of atmospheric radiation during the summer monsoon. These measurements will be combined with associated satellite data to provide the first well-sampled direct estimates of the energy balance across the atmosphere. This dataset will provide valuable information to an ongoing effort called

Note: This page contains sample records for the topic "facility documents arm" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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81

ARM - Facility News Article  

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August 31, 2006 [Facility News] August 31, 2006 [Facility News] New Lidars Installed at Tropical Western Pacific Site Bookmark and Share A representative from Sigma Space Corporation trains ARM operations staff in Darwin, Australia, on various components of the new micropulse lidar. The lidar, shown at left, will be placed in one of the outdoor instrument shelters, below a hole in the roof for the laser to pulse through. A representative from Sigma Space Corporation trains ARM operations staff in Darwin, Australia, on various components of the new micropulse lidar. The lidar, shown at left, will be placed in one of the outdoor instrument shelters, below a hole in the roof for the laser to pulse through. As reported in May, all the ARM sites are benefiting from new and upgraded micropulse lidars. This month, the new lidar was received in Darwin,

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ARM - Facility News Article  

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June 28, 2013 [Facility News] June 28, 2013 [Facility News] What's a Little Helium Among Friends? Bookmark and Share In early June, this 38-cylinder helium storage system arrived at the ARM Southern Great Plains site with nearly 18,000 standard cubic feet of helium left in it-enough to launch about 400 weather balloons. In early June, this 38-cylinder helium storage system arrived at the ARM Southern Great Plains site with nearly 18,000 standard cubic feet of helium left in it-enough to launch about 400 weather balloons. What is white and blue, can hold 55,000 standard cubic feet (scf) of gas, and looks like it could attach to the International Space Station? A helium storage system, of course. This impressive contraption arrived at the ARM Southern Great Plains site in early June, along with 18,000 scf of helium inside-valuable stuff,

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ARM - Facility News Article  

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, 2011 [Facility News] , 2011 [Facility News] Methane Monitor Joins Surface Flux Instruments at North Slope Bookmark and Share The new ECOR/SEBS Tower at the NSA site in Barrow includes greenhouse gas flux instruments. At the top of the tower, left to right, are the methane sensor, sonic anemometer, and carbon dioxide and water vapor sensor. The horizontal arm below and to the left of these instruments is a net radiometer. The new ECOR/SEBS Tower at the NSA site in Barrow includes greenhouse gas flux instruments. At the top of the tower, left to right, are the methane sensor, sonic anemometer, and carbon dioxide and water vapor sensor. The horizontal arm below and to the left of these instruments is a net radiometer. In October 2011, the ARM North Slope of Alaska site in Barrow welcomed a

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ARM - Facility News Article  

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31, 2006 [Facility News] 31, 2006 [Facility News] Infrared Loss Study Underway at North Slope of Alaska Bookmark and Share At ARM's North Slope of Alaska site in Barrow, collocated sky radiometers are being evaluated to refine the methodology that accounts for infrared loss in polar conditions. At ARM's North Slope of Alaska site in Barrow, collocated sky radiometers are being evaluated to refine the methodology that accounts for infrared loss in polar conditions. In the far northern reaches of Alaska, extended periods of both darkness and daylight occur throughout the year. Additionally, extremely cold weather conditions contribute to a harsh operating environment for research equipment. Therefore, broadband radiometers at the ARM North Slope of Alaska (NSA) site are equipped with electric heaters inside the ventilators

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ARM - Facility News Article  

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30, 2007 [Facility News] 30, 2007 [Facility News] Improved Instrument Calibration Capabilities Benefit All Sites, Users Bookmark and Share To ensure that ARM precipitation measurements are as accurate as possible, the SGP rain gauges (white cylinder above left) are inspected every two weeks, are statically calibrated in the field every six months, and will now be dynamically calibrated on an annual basis using the system shown above. To ensure that ARM precipitation measurements are as accurate as possible, the SGP rain gauges (white cylinder above left) are inspected every two weeks, are statically calibrated in the field every six months, and will now be dynamically calibrated on an annual basis using the system shown above. The ARM fills a unique position in the scientific community by obtaining

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ARM - Facility News Article  

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March 31, 2007 [Facility News] March 31, 2007 [Facility News] Radiometers Operate in Low Water Vapor Conditions in Barrow, Alaska Bookmark and Share A researcher checks the GVR antennae on a cold, crisp day at the ARM site in Barrow, Alaska. The radiometer is inside the insulated box beneath the antenna; the data is collected and displayed on the computer inside the instrument shelter. A researcher checks the GVR antennae on a cold, crisp day at the ARM site in Barrow, Alaska. The radiometer is inside the insulated box beneath the antenna; the data is collected and displayed on the computer inside the instrument shelter. To provide more accurate ground-based measurements of water vapor in extremely arid environments, three types of 183.3-GHz radiometers operated simultaneously in February and March at the ARM North Slope of Alaska site

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The ARM Aerial Facility  

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ARM Aerial Facility ARM Aerial Facility in the Biomass Burn Observation Project (BBOP) 1 Beat Schmid, Technical Director Pacific Northwest National Laboratory Richland, WA Aircraft Technical Information Length: 19.4 m Wingspan: 23.9 m Height: 7.1 m Cabin space: 15.3 m 2 External probes (PMS cans): 8 Maximum gross weight: 16,330 kg Maximum Endurance: 9.5 hours Maximum Range: 4000 km Endurance with full payload: 4-5 hours Crew capacity: 7 max, 2 pilots + 3-5 scientists Cabin payload: 1,900 kg Research Power: 700A @ 28 VDC (incl. 85A @ 115 VAC, 60 Hz) Ceiling: 7.6 km G-1 (BMI owned, ARM base funded, PNNL based and managed, for the science community) AAF G-1 Plan 2013-17 Intensive Airborne Research in Amazonia (IARA) Manaus, Brazil PI: Scot Martin (Harvard)

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ARM - Facility News Article  

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October 15, 2007 [Facility News] October 15, 2007 [Facility News] ARM Joins National Science Foundation Remote Sensing Collaboration Bookmark and Share In September, the ARM Climate Research Facility became an official member of the National Science Foundation's Center for Collaborative Adaptive Sensing of the Atmosphere, or CASA. Initial discussions for partnering began nearly a year ago. After a series of informative visits and presentations, the decision was made to move forward with membership process. The transfer of interagency funds was completed on September 18, 2007, solidifying the partnership. In the meantime, CASA dedicated a significant effort to support the CLASIC field campaign in June 2007 by providing a network of four scanning X-band radars. CASA is a multi-sector partnership among academia, industry, and government

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ARM - Facility News Article  

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June 15, 2006 [Facility News] June 15, 2006 [Facility News] Data From Rotating Shadowband Spectroradiometer Now Available in Data Archive Bookmark and Share The Rotating Shadowband Spectroradiometer (RSS) is calibrated bi-weekly with external lamp calibrators for accuracy. The Rotating Shadowband Spectroradiometer (RSS) is calibrated bi-weekly with external lamp calibrators for accuracy. After refinements based on a series of successful field trials, the latest Rotating Shadowband Spectroradiometer (RSS) joins the collection of permanent ARM instruments at the ARM Southern Great Plains (SGP) site. The current RSS-known as the RSS105-is deployed at the SGP Central Facility and is the first commercially built RSS manufactured by Yankee Environmental Systems, Inc. Since its deployment in May 2003, the RSS has

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ARM - Facility News Article  

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October 11, 2011 [Facility News] October 11, 2011 [Facility News] Final Recovery Act Milestone Complete! Bookmark and Share To support all the new instruments from the Recovery Act, infrastructure upgrades ranging from power and platforms to communications and data systems required a focused team effort. To support all the new instruments from the Recovery Act, infrastructure upgrades ranging from power and platforms to communications and data systems required a focused team effort. For the past year and a half, ARM scientists, engineers, operations, and data systems staff have been working tirelessly to support the installation and operation of nearly 150 new and upgraded instruments throughout the user facility. In September, ARM received its final three instruments - a radar wind profiler; a micropulse lidar for the Darwin, Australia site; and

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ARM - Facility News Article  

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April 30, 2013 [Facility News] April 30, 2013 [Facility News] Gearing Up for Science in Amazon Rainforest Bookmark and Share In March 2013, an initial instrument suite began operating near Manacupuru, in the Brazilian state of Amazonas, as part of the GOAMAZON field campaign. In March 2013, an initial instrument suite began operating near Manacupuru, in the Brazilian state of Amazonas, as part of the GOAMAZON field campaign. Preparing for the biggest and most complex deployment of field resources to date, the ARM Mobile Facility operations team from Los Alamos National Laboratory spent three weeks in Brazil in early March tackling a range of protocol and logistics tasks for next year's GOAMAZON field campaign. Between ARM and Brazilian collaborators, about 80 instruments will obtain

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ARM - Facility News Article  

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May 15, 2008 [Data Announcements, Facility News] May 15, 2008 [Data Announcements, Facility News] Announcing the Release of the Radiative Flux Analysis PI Product Bookmark and Share Developed by Dr. Chuck Long, Radiative Flux Analysis PI Product data are now available from the ARM Climate Research Facility Archive. The current release includes data for all of the ARM fixed sites (except Darwin, which requires manual processing because of the monsoon season) plus data for the AMF deployments at Pt. Reyes and the COPS Black Forest site. Future releases will include data for Darwin, the COPS Hornisgrinde and Rhine Valley sites, and the AMF Niamey deployment. The Radiative Flux Analysis is a technique for using surface shortwave (SW) and longwave (LW) broadband radiation measurements for detecting periods of

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October 8, 2012 [Facility News] October 8, 2012 [Facility News] Near Miss at Barrow Due to Beach Erosion Bookmark and Share With a little help from his friends, Walter Brower (hidden by the ECOR) moves the system away from the ocean's edge as an early September storm pounds away at the beach. With a little help from his friends, Walter Brower (hidden by the ECOR) moves the system away from the ocean's edge as an early September storm pounds away at the beach. On a stormy Friday evening in early September, Walter Brower received an urgent message: "Beach erosion very close to ECOR Point." Brower is the local facility manager for ARM's North Slope of Alaska site in Barrow. His duties extend to Point Barrow at the coastline of the Arctic Ocean, where ARM operates an eddy correlation flux measurement system, or

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July 10, 2012 [Facility News] July 10, 2012 [Facility News] Collaborations in Atmospheric Science and Observations Discussed in Germany Bookmark and Share Susanne Crewell (center) is flanked by Jimmy Voyles (left) and Shaocheng Xie (right) during a tour of the Research Center Juelich and the university's Jülich ObservatorY for Cloud Evolution (JOYCE) site. Crewell explained that JOYCE, like ARM facilities, was designed for long-term continuous measurements of cloud, radiation, boundary humidity, and precipitation, using active and passive remote sensing instruments. Susanne Crewell (center) is flanked by Jimmy Voyles (left) and Shaocheng Xie (right) during a tour of the Research Center Juelich and the

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May 15, 2004 [Facility News] May 15, 2004 [Facility News] Mid-latitude Cirrus Cloud Experiment Underway Bookmark and Share NASA's WB-57F research aircraft can carry an instrument payload up to 6,000 lbs. NASA's WB-57F research aircraft can carry an instrument payload up to 6,000 lbs. In late April, scientific collaborators at the National Aeronautics and Space Administration (NASA) carried out two high-altitude flights over the ARM Climate Research Facility Southern Great Plains (SGP) central facility. The purpose of these flights was to use a new suite of cloud property probes on the WB-57F aircraft to more accurately characterize the properties of mid-latitude cirrus clouds-which are composed solely of ice crystals-than has previously been possible. Eight flights over the SGP central facility were originally planned, but the expected cirrus clouds

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30, 2007 [Facility News] 30, 2007 [Facility News] High-Speed Internet Deflects Information Overload Bookmark and Share Covering approximately 143,000 square kilometers in Oklahoma and Kansas, instruments at the various facilities throughout the SGP site generate approximately 27 gigabytes of data every day. Covering approximately 143,000 square kilometers in Oklahoma and Kansas, instruments at the various facilities throughout the SGP site generate approximately 27 gigabytes of data every day. A little more room in the internet link at the ARM Southern Great Plains site is providing needed relief to the crowded lines that keep data flowing from the site. In July 2007, the internet service from the SGP Central Facility was switched to a higher speed (6 megabits) link, increasing the

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15, 2010 [Facility News] 15, 2010 [Facility News] Water Vapor Network at SGP Site Goes Offline Bookmark and Share Each of the 24 solar-powered GPS stations streamed data via a wireless network to the SGP Central Facility for data collection and storage. Each of the 24 solar-powered GPS stations streamed data via a wireless network to the SGP Central Facility for data collection and storage. After nearly eleven years, the Single Frequency GPS Water Vapor Network field campaign at the ARM Southern Great Plains (SGP) site came to a close on July 1, 2010. Installed between 1999 and 2000, this network consisted of 24 GPS stations operating within an 8-kilometer radius around the SGP Central Facility near Lamont, Oklahoma. Developed to function as a single instrument, the network simultaneously measured "slant water vapor" in

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December 15, 2007 [Facility News] December 15, 2007 [Facility News] Radar Antenna Replacement Effort Begins at Barrow Bookmark and Share On November 28, 2007, ARM operations and engineering staff braved -15°F weather to install the new radar antenna at Barrow. After lifting the antenna via crane onto the roof of the skydeck, the gloves had to come off to securely fasten all the tiny connecting screws and bolts-brrrrr! On November 28, 2007, ARM operations and engineering staff braved -15°F weather to install the new radar antenna at Barrow. After lifting the antenna via crane onto the roof of the skydeck, the gloves had to come off to securely fasten all the tiny connecting screws and bolts-brrrrr! For estimates of cloud boundaries, there is no better capability than the millimeter wave cloud radar (MMCR). This sophisticated radar is part of the

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October 6, 2010 [Facility News] October 6, 2010 [Facility News] New Raman Lidar En Route to Australia Bookmark and Share Since 1996, the ARM Southern Great Plains site has maintained one of the few operational Raman lidars in the world. Now, thanks to funding from the American Recovery and Reinvestment Act, the ARM Tropical Western Pacific site is about to join that exclusive group. A new Raman lidar, built by Sandia National Laboratories in New Mexico, is on its way to Darwin, Australia. Optics contained inside the Raman lidar shelter guide backscattered laser radiation in order to measure signals collected by the telescope. Optics contained inside the Raman lidar shelter guide backscattered laser radiation in order to measure signals collected by the telescope. The Raman lidar (light detection and ranging) uses pulses of laser

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Military Facilities, Restricted Airspace Okayed to Support Arctic Cloud Military Facilities, Restricted Airspace Okayed to Support Arctic Cloud Experiment Bookmark and Share As shown in this aerial photo of Oliktok Point, Alaska, the USAF Long Range Radar Station-also known as Dew Line Station-is situated at the edge of the Arctic Ocean. Instrumentation for the ARM Program's M-PACE experiment will be located just south of the station, near the aircraft hangar. (Photo courtesy of Aeromap U.S.) As shown in this aerial photo of Oliktok Point, Alaska, the USAF Long Range Radar Station-also known as Dew Line Station-is situated at the edge of the Arctic Ocean. Instrumentation for the ARM Program's M-PACE experiment will be located just south of the station, near the aircraft hangar. (Photo courtesy of Aeromap U.S.) After more than a year and a half of planning, proposals, and paperwork,

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5, 2010 [Data Announcements, Facility News] 5, 2010 [Data Announcements, Facility News] New Datastream Identifies Nauru Data Influenced by Clouds Bookmark and Share A new data set that identifies periods when Nauru data may be affected by island-influenced clouds has been produced by Chuck Long, site scientist for the ARM Tropical Western Pacific site. The Nauru island effect (NIE) data set currently covers the period from September 2005 to May 2010 and will be updated periodically as new data are obtained. This data set will help scientists in their analysis of cloud and radiation data at Nauru and will enable them to perform more relevant comparisons of observations and model results. This conceptual model of the Nauru island effect phenomenon shows the location of the ARM and auxiliary Licor shortwave radiometer sites.

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31, 2007 [Facility News] 31, 2007 [Facility News] Long-term Radiosonde Validation Campaign Concludes Bookmark and Share In 2007, sonde launches at ARM sites supported validation of the IASI instrument onboard the Metop-A satellite. As the satellite scans a "swath" of the Earth below it, the IASI scanning mirror directs emitted infrared radiation into the uncovered interferometer to derive atmospheric temperature and humidity profiles. (Image source: European Space Agency) In 2007, sonde launches at ARM sites supported validation of the IASI instrument onboard the Metop-A satellite. As the satellite scans a "swath" of the Earth below it, the IASI scanning mirror directs emitted infrared radiation into the uncovered interferometer to derive atmospheric temperature and humidity profiles. (Image source: European Space Agency)

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15, 2005 [Facility News] 15, 2005 [Facility News] Upgrades to Darwin Radar Double Data Delivery Bookmark and Share The new processor for the MMCR at Darwin collects spectral data in four different modes, resulting in approximately 3.4 gigabytes of signal output per day. The new processor for the MMCR at Darwin collects spectral data in four different modes, resulting in approximately 3.4 gigabytes of signal output per day. Virtually all cloud studies within the ARM Program involve the Millimeter Wavelength Cloud Radar (MMCR). This instrument is the only source for obtaining detailed information about cloud location and internal structure in the atmospheric columns above the ARM sites, and can be operated in almost any atmospheric condition. In November, a major upgrade to the 35

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ARM - Facility News Article  

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May 11, 2012 [Education, Facility News] May 11, 2012 [Education, Facility News] Fairbanks Middle Schoolers Enjoy Field Trip to Barrow Bookmark and Share Watershed School's bundled-up 8th grade class and their chaperones stop for a quick photo in front of the U.S. flag near the Arctic sea ice. With its consistently chilly temperatures, student visits to the ARM site in Barrow are somewhat rare, but always welcome! Watershed School's bundled-up 8th grade class and their chaperones stop for a quick photo in front of the U.S. flag near the Arctic sea ice. With its consistently chilly temperatures, student visits to the ARM site in Barrow are somewhat rare, but always welcome! In April, the 8th grade class from Watershed School in Fairbanks, Alaska, made the long trek to the North Slope for a week-long field trip filled

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25, 2011 [Education, Facility News] 25, 2011 [Education, Facility News] Remote Schools Welcome Much-Needed Resources Bookmark and Share Students at the Children's Academy Centre in Lorengau gather as Jacklyn Soko, Teacher-in-Charge at the school, gratefully receives the donation of a new copier. Students at the Children's Academy Centre in Lorengau gather as Jacklyn Soko, Teacher-in-Charge at the school, gratefully receives the donation of a new copier. Seven schools on Manus Island recently welcomed new copiers donated through ARM's Education and Outreach program. Hymson Waffi, officer-in-charge for the ARM's Tropical Western Pacific site on Manus Island, enjoyed the happy task of delivering the equipment to the various schools, including elementary, primary, secondary, and an academy. Each copier was accompanied

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September 30, 2010 [Facility News] September 30, 2010 [Facility News] Measurements of Total Surface Energy Now Available from Australia Bookmark and Share As shown in this photo at the wharf in Darwin, Australia, the new ECOR/SEBS station includes solar panels for power. As shown in this photo at the wharf in Darwin, Australia, the new ECOR/SEBS station includes solar panels for power. Measurements of sensible, latent, and carbon dioxide fluxes are valuable for refining both regional and global climate models. Since 1997, only ARM's Southern Great Plains site provided these continuous measurements using eddy correlation flux (ECOR) and energy balance Bowen ratio (EBBR) stations. Now, ARM's tropical site in Darwin, Australia, is also providing these measurements, thanks to the American Recovery and

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January 15, 2010 [Facility News] January 15, 2010 [Facility News] Radiometer Powered Up Down Under for Field Campaign at Gunn Point Bookmark and Share Near the tip of Australia's Northern Territory, Gunn Point is the location for the Darwin ARM Representativeness Experiment, or DARE. This offsite field campaign is obtaining measurements of solar and thermal energy and cloud properties, to compare against similar measurements collected at the permanent ARM site in Darwin, about 25 kilometers to the southwest of Gunn Point. Data collected by instruments at both sites will be compared to help scientists quantify local influences and variability that affect how representative measurements at the Darwin site are compared to the wider area. Radiometers (right) mounted on the roof of a shelter near the C-POL radar (left) confirmed loss of data due to shadowing effects.

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Scientists Convene in Australia to Plan International Cloud Experiment Scientists Convene in Australia to Plan International Cloud Experiment Bookmark and Share During TWP-ICE, cloud property data will be obtained from numerous research aircraft and a network of surface-based remote sensing sites, including a ship operating in the Timor Sea and numerous ground sites in a 200 km diameter around the ARM Climate Research Facility site in Darwin, Australia. During TWP-ICE, cloud property data will be obtained from numerous research aircraft and a network of surface-based remote sensing sites, including a ship operating in the Timor Sea and numerous ground sites in a 200 km diameter around the ARM Climate Research Facility site in Darwin, Australia. Coming from as far away as Italy, Switzerland, and the United States, a 45 member team gathered in Darwin, Australia, in mid-November to discuss plans

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14, 2012 [Education, Facility News] 14, 2012 [Education, Facility News] ARM Education Receives Seal of Approval Bookmark and Share Resources selected by the Climate Literacy and Energy Awareness Network (CLEAN) must pass an extensive peer-review process to verify the accuracy and currency of the science. Resources selected by the Climate Literacy and Energy Awareness Network (CLEAN) must pass an extensive peer-review process to verify the accuracy and currency of the science. ARM's lesson plan, "Effects of Solar Radiation on Land and Sea" was recently selected for inclusion in the NSF-funded Climate Literacy and Energy Awareness Network's (CLEAN) collection of educational resources. Receipt of the prestigious CLEAN seal means that the selected resource passed an extensive peer-review by educators and scientists to ensure

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April 15, 2006 [Facility News] April 15, 2006 [Facility News] TWP Site Hosts Preliminary Study for Long Term Measurements of Greenhouse Gases Bookmark and Share To validate the space-based carbon dioxide retrievals by the Orbiting Carbon Observatory (OCO) through comparative carbon dioxide measurements, ARM's Tropical Western Pacific site in Darwin, Australia, is hosting a ground-based solar-viewing Fourier transform spectrometer (FTS) mobile laboratory, sponsored by the OCO Science Team. Between January 15 and February 7, 2006, overflights of the FTS site, as well as "flights of opportunity" by ARM's Proteus aircraft during the Tropical Warm Pool International Cloud Experiment, were completed. Additional flights from the European Union's Geophysica aircraft over the site in November and December

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May 20, 2011 [Facility News] May 20, 2011 [Facility News] From Snow to Sand; Mobile Facility Headed to the Maldives Bookmark and Share AMF2 operations team members pack up the 3-channel microwave radiometer at the STORMVEX valley floor site in Steamboat Springs, Colorado. AMF2 operations team members pack up the 3-channel microwave radiometer at the STORMVEX valley floor site in Steamboat Springs, Colorado. After spending six very snowy months at Steamboat Springs, Colorado, the second ARM Mobile Facility (AMF2) is switching gears and heading to the tropical climes of the Maldives in the Indian Ocean. In mid-April, the Storm Peak Lab Cloud Property Validation Experiment (STORMVEX) came to a close, ending the final chapter of the AMF2's maiden deployment. After packing up the instruments and data systems, the AMF2 team is now preparing

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ARM - Facility News Article  

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Satellite Service Conserves Cash Satellite Service Conserves Cash Bookmark and Share In April, operations personnel completed a series of cost-saving data communication changes at the ARM Climate Research Facility Southern Great Plains (SGP) locale. The T-1 telephone lines at the four SGP boundary facilities were replaced with satellite dish technology. This change still allows large data sets to be transferred at acceptable bandwidth but at substantial savings. Inexpensive satellite services now meet data transmission needs at the SGP boundary facilities. Inexpensive satellite services now meet data transmission needs at the SGP boundary facilities. Huge amounts of data are collected daily by SGP site instruments. These data must be transmitted rapidly and reliably from remote measurement

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15, 2007 [Facility News] 15, 2007 [Facility News] Commercial Infrared Sky Imagers Compared Bookmark and Share Three of the four instruments used in the sky imager intercomparison are visible in this photo taken on the Guest Instrument Facility platform at the SGP site. They are the Solmirus All Sky Infrared Visible Analyzer (foreground); Heitronics Nubiscope (top right); and Atmos Cloud Infrared Radiometer-4 (far left). Three of the four instruments used in the sky imager intercomparison are visible in this photo taken on the Guest Instrument Facility platform at the SGP site. They are the Solmirus All Sky Infrared Visible Analyzer (foreground); Heitronics Nubiscope (top right); and Atmos Cloud Infrared Radiometer-4 (far left). Four infrared imaging instruments were installed and operated at the ARM

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ARM - Facility News Article  

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February 28, 2006 [Facility News] February 28, 2006 [Facility News] Network of Infrared Thermometers Nearly Complete at SGP Bookmark and Share Red dots indicate extended facilities at SGP with the new IRTs installed; green dots indicate future installations. Red dots indicate extended facilities at SGP with the new IRTs installed; green dots indicate future installations. As reported in April 2005, a network of infrared thermometers (IRT) is being installed throughout the ARM Southern Great Plains (SGP) site for the purpose of measuring cloud base temperature and inferring cloud base height across the domain. These measurements will enhance existing SGP surface and satellite cloud measurements to help scientists improve their calculations of heating rate profiles on the scale of global climate models. The first

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ARM - Facility News Article  

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March 10, 2010 [Facility News] March 10, 2010 [Facility News] Atmospheric System Research Funding Opportunity Announced Bookmark and Share The U.S. Department of Energy's Office of Science is now accepting applications for Office of Biological and Environmental Research (BER) research grants for the development of innovative laboratory and observational data analyses. The resulting knowledge from such analyses will be used to improve cloud and aerosol formulations in global climate models. If the application is successful, the research will be part of the Atmospheric System Research (ASR) Program in the Climate and Environmental Sciences Division (CESD). The mission of ASR, in partnership with the ARM Climate Research Facility, is to quantify the interactions among aerosols, clouds, precipitation, radiation, dynamics, and thermodynamics to improve

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ARM - Facility News Article  

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July 23, 2008 [Data Announcements, Facility News] July 23, 2008 [Data Announcements, Facility News] Second Version of Long-Term Climate Modeling Best Estimate Data Released Bookmark and Share Version 2 of the Climate Modeling Best Estimate includes the data source information for cloud fraction, as depicted in this data plot. Version 2 of the Climate Modeling Best Estimate includes the data source information for cloud fraction, as depicted in this data plot. With major improvements in the cloud fraction, cloud liquid water path (LWP), precipitable water vapor (PWV), and surface radiative fluxes, a new version of the "Climate Modeling Best Estimate" (CMBE) is now available from the ARM Climate Research Facility Archive. This data set, specifically tailored for use in evaluating global climate models, includes long-term

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ARM - Facility News Article  

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User Facility Improvements Continue at North Slope of Alaska Locale User Facility Improvements Continue at North Slope of Alaska Locale Bookmark and Share The "skydeck" at Barrow shows how the instrument platforms can get very crowded during peak experimental periods. The "skydeck" at Barrow shows how the instrument platforms can get very crowded during peak experimental periods. Two things are critical for conducting scientific research: adequate equipment and power. This is especially true in the Arctic, where average winter temperatures hover around -30 degrees Celsius, and access to additional resources is limited. After experiencing crowded working conditions during complex field campaigns last year, followed by several power outages this past winter, operations staff at the ARM Climate Research Facility's North Slope of Alaska (NSA) locale began implementing

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ARM - Facility News Article  

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5, 2011 [Facility News] 5, 2011 [Facility News] Atmospheric System Research Announces Funding Opportunity Bookmark and Share The U.S. Department of Energy's Office of Science is now accepting applications for Office of Biological and Environmental Research (BER) research grants for the development of innovative laboratory and observational data analyses. The resulting knowledge from such analyses will be used to improve cloud and aerosol formulations in global climate models. Successful applications will be part of the Atmospheric System Research (ASR) Program in the Climate and Environmental Sciences Division (CESD). The mission of ASR, in partnership with the ARM Climate Research Facility, is to quantify the interactions among aerosols, clouds, precipitation, radiation, dynamics, and thermodynamics to improve fundamental

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ARM - Facility News Article  

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August 15, 2010 [Facility News] August 15, 2010 [Facility News] Micropulse Lidars Get Boost from Recovery Act Bookmark and Share Shown here during installation on the aft deck of the RV Connecticut, the upgraded MPL includes a sleek new computer that can fit into smaller spaces. The laser window at the top is covered by a cone until the instrument is turned on. Shown here during installation on the aft deck of the RV Connecticut, the upgraded MPL includes a sleek new computer that can fit into smaller spaces. The laser window at the top is covered by a cone until the instrument is turned on. Through funding from the American Recovery and Reinvestment Act of 2009, ARM is upgrading the micropulse lidars (MPL) throughout the user facility. Similar to a radar, the MPL sends pulses of energy into the atmosphere.

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January 11, 2007 [Facility News] January 11, 2007 [Facility News] ARM Mobile Facility Moves to China in 2008 for Study of Aerosol Impacts on Climate Bookmark and Share Onshore winds and a mountain range to the west of Shanghai form a natural basin which traps particulates in the air above the Yangtze River delta region. (Illustration courtesy of Patricia Ebrey, University of Washington) Onshore winds and a mountain range to the west of Shanghai form a natural basin which traps particulates in the air above the Yangtze River delta region. (Illustration courtesy of Patricia Ebrey, University of Washington) China generates exceptionally high amounts of aerosol particles whose influence on the atmosphere has been detected across the Pacific Rim. In the Yangtze River delta in southeast China, these high aerosol loadings

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121

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31, 2005 [Facility News] 31, 2005 [Facility News] Ancillary Site to Provide Key Data from Africa Bookmark and Share In January 2006, the ARM Mobile Facility (AMF) begins a year-long field campaign in Africa as part of a multi-year international experiment called the African Monsoon Multidisciplinary Analysis (AMMA). The AMF will be placed at the airport in Niamey, Niger, well within view of the Global Earth Radiation Budget (GERB) geostationary satellite. Cloud and radiative property measurements collected by the AMF will be used in conjunction with GERB data for a greater understanding of the atmosphere than could be gained from either dataset alone. While preparing for the campaign, the science team identified the need for instrumentation at an off-site location to compare radiative measurements from the natural environment of

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Raman Lidar Refurbishment and Upgrade Completed Raman Lidar Refurbishment and Upgrade Completed Bookmark and Share During the past several years, the sensitivity of the 8-year old Raman lidar at the ARM Climate Research Facility Southern Great Plains (SGP) site has decreased between a factor of 3-4, resulting in a lower maximum altitude and increased random error in the geophysical properties (such as water vapor mixing ration and aerosol extinction profiles) derived from lidar. In September 2004, a ten-month effort to refurbish and upgrade the aging lidar was completed, as ARM scientists visited the site to align the instrument's newly-refurbished receiving telescope, install new interference filters, and optimize signal levels. Replacing the telescope and interference filters returned the lidar's sensitivity back to its

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New Data Stream Available from Millimeter Wave Cloud Radar New Data Stream Available from Millimeter Wave Cloud Radar Bookmark and Share Inside the instrument shelter, the MMCR data system collects radar spectral data and processes these into reflectivity, vertical velocities, and spectral width. Inside the instrument shelter, the MMCR data system collects radar spectral data and processes these into reflectivity, vertical velocities, and spectral width. As a result of upgrades to the Millimeter Wave Cloud Radar (MMCR) processors (see http://www.arm.gov/acrf/updates051504.stm#nsammcr) at the ARM Climate Research Facility Southern Great Plains (SGP) and North Slope of Alaska (NSA) locales, two MMCR data streams-mmcrcalC1.a1 (calibration data) and mmcrmomentsC1.a1 (spectral "moments" data)-have been combined

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ARM Climate Research Facility  

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3 3 ARM Climate Research Facility Quarterly Value-Added Product Report Chitra Sivaraman October 2011 DISCLAIMER This report was prepared as an account of work sponsored by the U.S. Government. Neither the United States nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or

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9, 2011 [Facility News] 9, 2011 [Facility News] Forecasting Exercise Begins Oklahoma Storm Study Count Down Bookmark and Share Clouds like this, called by the name "anvil" for its shape, are one type of cloud system researchers hope to encounter during MC3E. Clouds like this, called by the name "anvil" for its shape, are one type of cloud system researchers hope to encounter during MC3E. Beginning April 2011, the ARM Southern Great Plains (SGP) site in north-central Oklahoma will host the first major field campaign to take advantage of numerous new radars and other remote sensing instrumentation installed throughout the site with funding from the American Recovery and Reinvestment Act. The Midlatitude Continental Convective Clouds Experiment (MC3E) will use two aircraft and a comprehensive array of ground-based

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30, 2009 [Facility News] 30, 2009 [Facility News] Smart Filter Clears the Way for Speedy Data Transfer Bookmark and Share These data plots illustrate the results of the smart filter in reducing the volume of MMCR data. The left column shows the full reflectivity data for individual radar data collection modes: cirrus, precipitation, general, and boundary layer. The right column shows the data retained after applying the clear-sky filter. These data plots illustrate the results of the smart filter in reducing the volume of MMCR data. The left column shows the full reflectivity data for individual radar data collection modes: cirrus, precipitation, general, and boundary layer. The right column shows the data retained after applying the clear-sky filter. As reported in mid-February, data transfer from the ARM Tropical Western

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9, 2012 [Facility News] 9, 2012 [Facility News] Unmanned Aircraft Test Flights Completed at Oliktok Point Bookmark and Share Because of its small size and light weight (72-inch wingspan and weighing about 22 pounds), the Bat-3 is launched using a bungee-powered catapult from the roof of a vehicle and can land autonomously on fixed wheels. Its modular design fits into two suitcase-sized containers. Because of its small size and light weight (72-inch wingspan and weighing about 22 pounds), the Bat-3 is launched using a bungee-powered catapult from the roof of a vehicle and can land autonomously on fixed wheels. Its modular design fits into two suitcase-sized containers. On October 22, a small flight team from New Mexico State University (NMSU) began the first in a series of test flights (see YouTube video) for the ARM

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January 18, 2012 [Facility News] January 18, 2012 [Facility News] Wind Profiler Completes Offsite Campaign Bookmark and Share The radar wind profiler operates by sending pulses of energy into the sky and measuring the strength and frequency of returned energy. The radar wind profiler operates by sending pulses of energy into the sky and measuring the strength and frequency of returned energy. Between November 2010 and November 2011, a handful of meteorological instruments-including Doppler sodar, ultrasonic anemometers, and one of ARM's radar wind profilers-gathered massive amounts of data for the Columbia Basin Wind Energy Study. To ensure that the data collected represent conditions experienced by real wind plants, the instruments were placed next to an operating wind farm on the eastern border of Washington

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June 19, 2012 [Facility News] June 19, 2012 [Facility News] Storm Chasers Take a Break at the Southern Great Plains Site Bookmark and Share Scientist Gunnar Senum (far left) from Brookhaven National Laboratory describes the aerosol observing system to a group of visiting meteorology students from Rutgers University. Scientist Gunnar Senum (far left) from Brookhaven National Laboratory describes the aerosol observing system to a group of visiting meteorology students from Rutgers University. Taking a break from storm chasing due to "good weather," a group of 16 meteorology students from Rutgers University visited the ARM Southern Great Plains site in early June. The students, ranging from juniors to recent graduates, are participating in an inaugural severe weather class taught by

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31, 2010 [Facility News] 31, 2010 [Facility News] Instruments on Mt. Pico to Supplement Measurements from Graciosa Island Bookmark and Share At an elevation of about 2225 meters-usually above the marine boundary layer-the Pico Observatory is able to measure properties in the atmosphere transported from North America and Europe. At an elevation of about 2225 meters-usually above the marine boundary layer-the Pico Observatory is able to measure properties in the atmosphere transported from North America and Europe. Located high on Mount Pico in the Azores, the University of the Azores, the University of Colorado, and Michigan Technological University operate an instrumented observation station, the Pico Observatory. In May, a small team of local volunteers from Pico Island helped install a set of ARM

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ARM - Facility News Article  

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15, 2007 [Facility News] 15, 2007 [Facility News] Radiosonde Temperature Sensor Benefits from Stronger Structure Bookmark and Share The new temperature sensor (front and back shown above) for the RS92 radiosonde sports an integrated fiber-reinforced structure that improves durability while maintaining the needed measurement accuracy and response. The new temperature sensor (front and back shown above) for the RS92 radiosonde sports an integrated fiber-reinforced structure that improves durability while maintaining the needed measurement accuracy and response. Small sensor packages called radiosondes (or "sondes") are used to transmit atmospheric information from weather balloons as they rise through the air. Vaisala, the supplier of sondes used at all the ARM sites, has introduced

132

ARM - Facility News Article  

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May 31, 2006 [Facility News] May 31, 2006 [Facility News] New Shortwave Spectroradiometer Deployed at SGP Bookmark and Share A ceiling port in the SGP Optical Trailer houses the optic element of the SWS, which connects to the spectrometer inside the trailer via fiber optic cable. A ceiling port in the SGP Optical Trailer houses the optic element of the SWS, which connects to the spectrometer inside the trailer via fiber optic cable. In late April, a new Shortwave Spectroradiometer (SWS) began operating at the ARM Southern Great Plains (SGP) site. The instrument measures the zenith solar spectral radiance (1.4° field of view) between 300-2200 nm. The SWS incorporates two Zeiss miniature monolithic spectrometers having a spectral resolution of 8 nm in the range 300-975 nm, and 12 nm in the range

133

ARM - Facility News Article  

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November 30, 2009 [Facility News] November 30, 2009 [Facility News] ARM Joins Global Reference Upper-Air Network Bookmark and Share Similar to a standard radiosonde, the frost point hygrometer is a digitally-controlled instrument attached to a weather balloon. As it rises through the air, atmospheric data collected by the sensor is recorded on the ground. This photo shows the computer chips, battery pack, and connector that make up the instrument package. Similar to a standard radiosonde, the frost point hygrometer is a digitally-controlled instrument attached to a weather balloon. As it rises through the air, atmospheric data collected by the sensor is recorded on the ground. This photo shows the computer chips, battery pack, and connector that make up the instrument package. One of the largest challenges from a global climate observations

134

ARM - Facility News Article  

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Disaster Plan Deflects Problems During Downpour Disaster Plan Deflects Problems During Downpour Bookmark and Share A late-winter storm in the Midwest could have wreaked havoc at the ARM Program's Southern Great Plains (SGP) site in northern Oklahoma. Fortunately, the site's Disaster Plan was successfully implemented. SGP's 160-acre Central Facility, the heart of the site, is heavily instrumented to collect and monitor atmospheric data collected from in situ and remote-sensing instrument clusters arrayed throughout the 55,000 square mile site. Although the Central Facility is on the highest point of land in the county, extreme rainfall and flooding on March 4 rendered access roads from the East impassable to vehicular traffic, and the West access road through Lamont was submerged in several locations. Local rainfall amounts

135

ARM - Facility News Article  

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April 30, 2008 [Facility News] April 30, 2008 [Facility News] Arctic Aerosol Study Flies By Bookmark and Share Ending its mission with a final flight on April 30, 2008, the Indirect and Semi-Direct Aerosol Campaign (ISDAC) flew a total of 103 research hours, completing 27 science flights primarily in the region around the ARM North Slope of Alaska site in Barrow. These flights included several golden cases where both cloud and aerosol measurements were obtained above, within, and below mixed-phase cloud layers. In addition, the campaign successfully demonstrated first-time airborne deployments of key instruments for measuring aerosol properties. All of the campaign's primary objectives were met, plus some secondary objectives, to help answer the team's science questions related to Arctic cloud and aerosol interactions.

136

ARM - Facility News Article  

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April 30, 2006 [Facility News] April 30, 2006 [Facility News] HydroKansas Follows Water Flowing Through Space and Time Bookmark and Share Sets of rain and stream gauges like this one will provide information about water level and flow rates from 14 different sites throughout the Whitewater River watershed during the HydroKansas field campaign. Sets of rain and stream gauges like this one will provide information about water level and flow rates from 14 different sites throughout the Whitewater River watershed during the HydroKansas field campaign. Beginning in May, the Whitewater River watershed in south-central Kansas is the setting for a 3-year field campaign hosted by the ARM's Southern Great Plains (SGP) site. Called "HydroKansas," the goal of this research project is to develop a predictive understanding of floods on multiple spatial and

137

ARM - Facility News Article  

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December 31, 2008 [Facility News] December 31, 2008 [Facility News] Arctic Field Campaign Data and Instrument Performance Reviewed at Workshop Bookmark and Share Both wings of the Canadian National Research Council's Convair-580 aircraft were equipped with numerous cloud and aerosol probes during ISDAC. Both wings of the Canadian National Research Council's Convair-580 aircraft were equipped with numerous cloud and aerosol probes during ISDAC. In April 2008, the month-long Indirect and Semi-Direct Aerosol Campaign (ISDAC) obtained cloud and aerosol data from above, within, and below clouds in the vicinity of the ARM site in Barrow, Alaska. In mid-November, about 50 members of the ISDAC science team gathered in Lansdowne, Maryland, for a 1-day workshop to review and assess data quality and instrument

138

ARM - Facility News Article  

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April 25, 2007 [Data Announcements, Facility News] April 25, 2007 [Data Announcements, Facility News] New, Improved Algorithm for Retrieving Liquid Water Path Now Available at the ARM Data Archive Bookmark and Share The MWRRET product uses an improved retrieval technique and a method to identify and remove biases from the data to greatly improve the retrieved LWP (blue). It also performs so-called physical retrievals at each radiosonde launch time (black dots)-physical retrievals are the best possible retrieval that can be performed. The MWRRET product uses an improved retrieval technique and a method to identify and remove biases from the data to greatly improve the retrieved LWP (blue). It also performs so-called physical retrievals at each radiosonde launch time (black dots)-physical retrievals are the best

139

ARM - Facility News Article  

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October 25, 2010 [Facility News] October 25, 2010 [Facility News] Testing Underway for New Doppler Lidars Bookmark and Share Two of the three new Doppler lidars are shown here during testing at the Southern Great Plains site in October. Two of the three new Doppler lidars are shown here during testing at the Southern Great Plains site in October. To improve climate models, the scientific community needs accurate and routine measurements of atmospheric winds with high vertical and temporal resolution under clear-air conditions. In particular, measurements of clear-air vertical air velocities will compliment in-cloud vertical velocity measurements from existing 35 and 95 gigahertz ARM cloud radars. In response to this need, three new Doppler lidars were purchased with funds from the American Recovery and Reinvestment Act and began a test

140

ARM - Facility News Article  

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September 30, 2007 [Facility News] September 30, 2007 [Facility News] Atqasuk Joins International Network of Meteorological Stations Bookmark and Share On the skydeck at Atqasuk, the new met pack (above right) and GPS receiver (circled at left) acquire data for the SuomiNet. On the skydeck at Atqasuk, the new met pack (above right) and GPS receiver (circled at left) acquire data for the SuomiNet. At the North Slope of Alaska, the ARM operates a research site in the remote town of Atqasuk, Alaska, to provide continental Arctic data to the climate research community. The Atqasuk site is proving useful to climate modelers since this inland site is more homogenous and uniform than coastal sites during summer months. Enhancements to the instrument suite in Atqasuk last year led to a recent addition that solidified Atqasuk's position on

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141

ARM - Facility News Article  

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May 15, 2008 [Facility News] May 15, 2008 [Facility News] North Slope of Alaska Site Hosts Guest Instruments for Arctic Aerosol Study Bookmark and Share In addition to airborne measurements obtained at the North Slope of Alaska for the Indirect and Semi-direct Aerosol Campaign (ISDAC) in April, the ARM site in Barrow also hosted several guest instruments throughout the campaign. Measurements from these additional instruments will provide important supplementary data to the continuous data collected at Barrow for investigating the role of aerosol physics and chemistry in regulating cloud microphysical properties in the Arctic. In particular, they will enhance the ISDAC data set with specific information about cloud and aerosol properties, aerosol indirect effects, precipitation, visibility

142

ARM - Facility News Article  

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ARM Facility Captures Rare Tornado Data ARM Facility Captures Rare Tornado Data Bookmark and Share Every spring, tornadoes thunder across five states, from Kansas to Texas, and alerts are common. However, by Monday, May 20, it was clear that this time the alert had a different urgency to it. The turn of events leading up to the EF-5 tornado that wreaked havoc in Moore, Oklahoma, provided a unique opportunity for scientists to sample the environment preceding a severe weather event. Raw data from the additional radiosonde launches preceding the severe weather events of May 20 in Oklahoma. The blue line identifies the temperature, which decreases with increasing altitude (decreasing pressure). The red line is the dew point; dew point-also expressed as a temperature-is the temperature at which the air is 100% saturated with its water vapor content (low values of the dew point represent low relative humidity). Where the dew point approaches the actual temperature, the air is nearing 100% relative humidity, or saturation, near the ground-ideal conditions for tornado events.

143

ARM - Facility News Article  

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Bookmark and Share Jim Mather, ARM Technical Director, demonstrated "cloud in a jar" to interested WeatherFest participants. Jim Mather, ARM Technical Director,...

144

ARM - SGP Radiometric Calibration Facility  

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pyrgeometers. The ARM Climate Research Facility requires accurate measurements of solar radiation from radiometers used in ground-based networks and airborne instrument...

145

ARM - Data Management and Documentation Plan  

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DocumentationData Management and Documentation Plan DocumentationData Management and Documentation Plan Policies, Plans, Descriptions Data Documentation Home Data Sharing and Distribution Policy Data Management and Documentation Plan Data Product Registration and Submission Reading netCDF and HDF Data Files Time in ARM netCDF Data Files Data Archive Documentation ARM Archive's Catalog of Data Streams (Updated monthly) Access to Historical ARM Data More on Understanding and Finding ARM Data Data Quality Problem Reporting Data Management and Documentation Plan Purpose This document describes datastream documentation requirements and standard formatting and naming protocols for both data users and the infrastructure who produce the data. Definitions Baseline Change Request (BCR): Used by the ARM Infrastructure as a process to provide configuration

146

ARM Climate Research Facility  

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1 1 ARM Climate Research Facility Quarterly Value-Added Product Report C Sivaraman October 2013 DISCLAIMER This report was prepared as an account of work sponsored by the U.S. Government. Neither the United States nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the U.S. Government or any agency thereof. The views and

147

ARM - Facility News Article  

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New Data Loggers Deployed New Data Loggers Deployed Bookmark and Share As shown in this partial screen capture, the Real Time Monitoring and Control feature displays data that allows local observers to quickly check the status of the instrument system. As shown in this partial screen capture, the Real Time Monitoring and Control feature displays data that allows local observers to quickly check the status of the instrument system. As part of ongoing effort to upgrade data loggers and logging systems throughout the ARM Climate Research Facility, new Campbell Loggers (version CR23X) are being installed at the Tropical Western Pacific (TWP) and at the North Slope of Alaska (NSA) locales. In fall 2003, Campbell Loggers for the surface meteorology systems at NSA were installed. In June 2004, Campbell

148

ARM Climate Research Facility  

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2 2 ARM Climate Research Facility Quarterly Value-Added Product Report C Sivaraman January 2013 DISCLAIMER This report was prepared as an account of work sponsored by the U.S. Government. Neither the United States nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the U.S. Government or any agency thereof. The views and

149

ARM - Facility News Article  

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Happy New (fiscal) Year! Cloud Droplet Probe Arrives in Time for SPARTICUS Happy New (fiscal) Year! Cloud Droplet Probe Arrives in Time for SPARTICUS Bookmark and Share The new cloud droplet probe, from Droplet Measurement Technologies, has angled tips to deflect particles away from the beam path and minimize the effects of "forward scattering." The new cloud droplet probe, from Droplet Measurement Technologies, has angled tips to deflect particles away from the beam path and minimize the effects of "forward scattering." Kicking off the new fiscal year, on October 1 the ARM Aerial Facility received the first component - a cloud droplet probe (CDP) - of many new aircraft research instruments that will arrive in the coming year through funding from the American Recovery and Reinvestment Act. Designed to measure the size distribution of cloud particles, the new probe

150

ARM - Facility News Article  

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Sunphotometer to Obtain Additional Aerosol Data in Niamey Sunphotometer to Obtain Additional Aerosol Data in Niamey Bookmark and Share Located nearby the AMF ground instruments, the sunphotometer, in the foreground, requires an unobstructed hemispheric view of the sky to obtain its measurements. Located nearby the AMF ground instruments, the sunphotometer, in the foreground, requires an unobstructed hemispheric view of the sky to obtain its measurements. In early August, a new Cimel sunphotometer (CSPHOT) was deployed at the ARM Mobile Facility site in Niamey, Niger, as part of the ongoing RADAGAST field campaign. The CSPHOT measures the solar and sky radiance at various wavelengths in the visible and near-infrared spectrum (340, 380, 440, 500, 670, 870, 936, 1020 nm). From these measurements, a number of aerosol

151

ARM Climate Research Facility  

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5 5 ARM Climate Research Facility Quarterly Value-Added Product Report C Sivaraman July 2013 DISCLAIMER This report was prepared as an account of work sponsored by the U.S. Government. Neither the United States nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the U.S. Government or any agency thereof. The views and

152

ARM - Facility News Article  

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Speedier Data Delivery Assists Storm Forecasters Speedier Data Delivery Assists Storm Forecasters Bookmark and Share SuomiNet is an international network of global positioning system (GPS) receivers, configured and managed to generate near real-time estimates of precipitable water vapor in the atmosphere, total electron content in the ionosphere, and other meteorological and geodetic information. Last fall, scientific collaborators at the National Oceanic and Atmospheric Administration (NOAA) Forecast Systems Laboratory identified a time-delay in the availability of SuomiNet data from the ARM Climate Research Facility's Southern Great Plains (SGP) site in Oklahoma. This delay was impacting short-range weather forecasts used by the National Weather Service's Storm Prediction Center in Norman, Oklahoma. Data from the SGP

153

ARM Climate Research Facility  

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2 2 ARM Climate Research Facility Quarterly Value-Added Product Report C Sivaraman November 2012 DISCLAIMER This report was prepared as an account of work sponsored by the U.S. Government. Neither the United States nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the U.S. Government or any agency thereof. The views and

154

ARM Climate Research Facility  

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8 8 ARM Climate Research Facility Quarterly Value-Added Product Report Chitra Sivaraman June 2012 DISCLAIMER This report was prepared as an account of work sponsored by the U.S. Government. Neither the United States nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the U.S. Government or any agency thereof. The views and

155

ARM - Facility News Article  

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Radiosonde Data Distribution In Place for Modeling During M-PACE Radiosonde Data Distribution In Place for Modeling During M-PACE Bookmark and Share An M-PACE researcher launches a radiosonde at Oliktok Point. Several launch periods, spanning at least 5 days each with 4 launches per day, are planned for all four experimental sites (Barrow, Oliktok Point, Atqasuk and Toolik Lake). An M-PACE researcher launches a radiosonde at Oliktok Point. Several launch periods, spanning at least 5 days each with 4 launches per day, are planned for all four experimental sites (Barrow, Oliktok Point, Atqasuk and Toolik Lake). During the Mixed-Phase Arctic Cloud Experiment (M-PACE), taking place in October 2004 at the ARM Climate Research Facility North Slope of Alaska (NSA) locale, radiosonde systems are being deployed at Atqasuk, Toolik

156

ARM - Facility News Article  

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Sunphotometer Re-installed at North Slope of Alaska Sunphotometer Re-installed at North Slope of Alaska Bookmark and Share The CIMEL sunphotometer takes sky radiance measurements during daylight hours, when the sun is above horizon. The CIMEL sunphotometer takes sky radiance measurements during daylight hours, when the sun is above horizon. In early May, a CIMEL sunphotometer owned by the National Aeronautics and Space Administration (NASA) was re-installed at Barrow, Alaska, one of two research sites that make up the ARM Climate Research Facility's North Slope of Alaska (NSA) locale. The CIMEL is a multi-channel, automatic sun-and-sky scanning radiometer that takes daytime measurements of direct solar radiance and sky radiance at the Earth's surface. Measurements are taken at discrete wavelengths in visible and near-infrared regions of the solar

157

ARM - Facility News Article  

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Improved Radiosonde Sensor Ready for Launch Improved Radiosonde Sensor Ready for Launch Bookmark and Share At the end of a string tied to the weather balloon, a small sensor package, called a radiosonde, contains the "brains" for measuring atmospheric temperature, pressure and humidity. At the end of a string tied to the weather balloon, a small sensor package, called a radiosonde, contains the "brains" for measuring atmospheric temperature, pressure and humidity. As part of the Balloon Borne Sounding System, radiosondes launched at the the ARM Climate Research Facility sites are supplied by Vaisala, one of the market leaders of this technology. Vaisala began phasing out production of the RS90 radiosondes at the end of calendar year 2004 in favor of their new RS92 model. The new version has an improved global positioning system

158

ARM - Facility News Article  

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Data Quality Application Gives Data Browsers a New View Data Quality Application Gives Data Browsers a New View Bookmark and Share Plot Browser, now available through the Data Quality Health and Status (DQ HandS) program, eases viewing by providing lists or thumbnail images of selected data streams. Plot Browser, now available through the Data Quality Health and Status (DQ HandS) program, eases viewing by providing lists or thumbnail images of selected data streams. The ARM Climate Research Facility's Data Quality Office has developed a new way to help data quality analysts, instrument mentors, and site scientists quickly and easily view diagnostic data quality plots, without making multiple selections to see just one plot. The new Plot Browser is a part of the Data Quality Health and Status (DQ HandS) application, which also

159

ARM - Facility News Article  

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Upgrade to Millimeter Wave Cloud Radar Increases Volume of Data Collection Upgrade to Millimeter Wave Cloud Radar Increases Volume of Data Collection Bookmark and Share In mid-April, hardware and software upgrades to the millimeter wave cloud radar (MMCR) at the ARM Climate Research Facility's North Slope of Alaska (NSA) were completed. Hardware upgrades included replacing the OS/2 and Solaris computers with two Windows 2000 computers. One of these computers is for the MMCR radar. It now has a new digital signal processing board that allows much more efficient processing of the radar return signals, resulting in higher temporal resolution. The receiver was also upgraded from a 12 bit to 14 bit analog-to-digital converter. Software on the MMCR radar computer was upgraded to run a modified version of Vaisala's LAP-XM software for controlling and acquiring the radar data. The other computer,

160

ARM Climate Research Facility  

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2 2 ARM Climate Research Facility Quarterly Value-Added Product Report C Sivaraman February 2012 DISCLAIMER This report was prepared as an account of work sponsored by the U.S. Government. Neither the United States nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the U.S. Government or any agency thereof. The views and

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While these samples are representative of the content of NLEBeta,
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We encourage you to perform a real-time search of NLEBeta
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161

ARM Climate Research Facility  

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6 6 ARM Climate Research Facility Spectral Surface Albedo Value-Added Product (VAP) Report S McFarlane K Gaustad C Long E Mlawer July 2011 DISCLAIMER This report was prepared as an account of work sponsored by the U.S. Government. Neither the United States nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or

162

ARM - Facility News Article  

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YouTube© Channel and Flickr® Added to Outreach Tools YouTube© Channel and Flickr® Added to Outreach Tools Bookmark and Share Look for ARM's new social media bar on the front page and in the ARM News Center. Look for ARM's new social media bar on the front page and in the ARM News Center. Starting this summer, the ARM Communications Team began moving archived ARM photo and video content into both Flickr and YouTube, respectively. These popular and cost-effective social media outlets join ARM's existing Facebook and Twitter accounts, providing additional options for sharing information with users and the public. All four sites can be accessed from the new social media bar on the ARM home page. YouTube offers a free and convenient space for storing videos and animations, and because it is dedicated solely to videos, there is no

163

ARM - Facility News Article  

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New Pump Shelter Kicks Off Upgrades to Aerosol Observing System New Pump Shelter Kicks Off Upgrades to Aerosol Observing System Bookmark and Share Representing the first of several planned improvements to the Aerosol Observing System (AOS) at the SGP site, the ARM Climate Research Facility operations staff completed installing a new pump shelter for the system in late September, followed by relocation of the pumps and connection of the electrical hookups in October. Though the enclosure was designed primarily to move the nine vacuum pumps out of the existing AOS trailer-thereby reducing the potential for damage to the AOS instruments from heat generated by the pumps-noise reduction in the AOS trailer was another desired outcome. Anticipated instrument additions were also considered in designing the new enclosure. The new pump shelter sits on a concrete pad near the south end of the AOS. Four adjustable, open-wire shelves run the width of the shelter, and can accommodate sixteen large pumps and associated ventilation equipment.

164

ARM - Facility News Article  

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Radar Focus Group Zeroes in on Data Quality Radar Focus Group Zeroes in on Data Quality Bookmark and Share On the roof of the radar instrument shelter at the ARM Southern Great Plains site, antennas for the W-band ARM Cloud Radar (rectangular white box) and millimeter wavelength cloud radar (conical cylinder) send data to their respective computer systems inside the shelter. On the roof of the radar instrument shelter at the ARM Southern Great Plains site, antennas for the W-band ARM Cloud Radar (rectangular white box) and millimeter wavelength cloud radar (conical cylinder) send data to their respective computer systems inside the shelter. In 2007, ARM established a Radar Focus Group to address strategic needs related to the use of radars as a key component of the ARM instrument suite. Based on needs identified by this group, a smaller team of science,

165

ARM - Facility News Article  

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rainfall rate and for improving these parameterizations in models that predict weather. Between May and June, the ARM Southern Great Plains (SGP) site is hosting a joint...

166

ARM - Facility News Article  

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tower, was lost around midnight on February 7. When on-site ARM staff discovered the power outage the following morning, they immediately implemented planned emergency...

167

ARM - Facility News Article  

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is under development. Taking its place alongside Nova and other PBS video clips and animations already on the site, ARM joins an impressive inventory in the Teachers' Domain...

168

ARM - Facility News Article  

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models, model results, high resolution models including the Weather Research and Forecasting Model, and observations from ARM and geostationary satellites. Similar to the...

169

ARM - Facility News Article  

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ARM Kiosk Joins International Science Exhibit in Germany Outdoor pavilions on the Isle of Mainau in Germany feature energy-related science and technology exhibits from May through...

170

ARM - Facility News Article  

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New ARM Exhibit Makes Debut at Fall Meeting of American Geophysical Union New ARM Exhibit Makes Debut at Fall Meeting of American Geophysical Union Bookmark and Share The new ARM display made its debut at the 2006 Fall Meeting of the American Geophysical Union (AGU) in December in San Francisco. The new ARM display made its debut at the 2006 Fall Meeting of the American Geophysical Union (AGU) in December in San Francisco. ARM staff returned to San Francisco in December 2006 for the 2006 American Geophysical Union (AGU) Fall Meeting, this time with a new exhibit. With over 1,120 sessions and 13,023 abstracts to choose from (an increase of more than 15 percent over the 2005 Fall Meeting), another attendance record was set. Nearly 14,000 scientists from around the world crowded the halls of the Moscone Center to share their research on Earth and space sciences.

171

ARM Mobile Facility (AMF2)  

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ARM Mobile Facility (AMF2) ARM Mobile Facility (AMF2) The ARM Mobile Facility (AMF2) is a durable, oceangoing mobile climate observatory. In 2008, the second ARM Mobile Facility (AMF2) was developed to extend the capabilities of the original AMF (AMF1) deployed in 2005. The AMF2 is portable, modular, and suited for operations on oceangoing ships and in harsh environments. The AMF2 has improved data flow and communications (primarily wireless) and optimized operating procedures. AMF2 instrument capabilities include standard meteorological instrumentation, a broadband and spectral radiometer suite, and remote sensing instruments. This instrumentation provides researchers with data from climate regimes not previously explored. The AMF2 also has available space, power, and data processing capabilities for additional instruments

172

ARM - Facility News Article  

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Education Kiosk Launched on Manus Island Staff of the Papua New Guinea National Weather Service pose with the soon-to-be-revealed ARM kiosk. Staff of the Papua New Guinea National...

173

ARM - Facility News Article  

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International Polar Year Draws on ARM Education and Outreach Efforts International Polar Year Draws on ARM Education and Outreach Efforts Bookmark and Share International Polar Year (IPY) kicks off on March 1, and education and outreach efforts are an integral part of the international activities. In collaboration with several other agencies, ARM Education and Outreach staff are working to promote awareness of the IPY and climate research on the North Slope of Alaska. Many of the resources developed previously by ARM Education and Outreach are being utilized in several of these efforts as IPY outreach coordinators strive to incorporate traditional knowledge of climate change into their educational programs. Community members check out the interactive climate kiosk at its permanent home in the Iñupiat Heritage Center in Barrow, Alaska.

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ARM - Facility News Article  

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Trace Gases Targeted During Aircraft Carbon Field Campaign Trace Gases Targeted During Aircraft Carbon Field Campaign Bookmark and Share During the Aircraft Carbon field campaign, ARM researchers will add a set of carbon-cycle instruments and sample collection systems to existing aircraft that routinely collect aerosol measurements at the ARM Southern Great Plains site. During the Aircraft Carbon field campaign, ARM researchers will add a set of carbon-cycle instruments and sample collection systems to existing aircraft that routinely collect aerosol measurements at the ARM Southern Great Plains site. Because Earth's atmosphere is comprised almost entirely of nitrogen and oxygen (78% and 21% by volume, respectively), the remaining 1% of the gases are referred to as "trace gases." Trace gases include harmless inert gases,

175

ARM - Facility News Article  

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how it fits into the goals of ARM and DOE. Dr. Gannet Hallar, Desert Research Institute (DRI) at Storm Peak Laboratory in Steamboat Springs, Colo., presented a lecture on aerosol...

176

ARM - Facility News Article  

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attended numerous others sessions and a variety of Town Hall meetings, including one on "Big Data" and another on the "Future of Research in the EU." Rotating duties at the ARM...

177

ARM - Facility News Article  

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servers With the welcome addition of Google via google.arm.gov, users can now see query results from all the website servers, including the Data Archive and the External Data...

178

ARM - Facility News Article  

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temperature, and humidity. ARM operations personnel will launch the balloons at 6 a.m. and 6 p.m. GMT, offsetting launches from the National Weather Service (NWS) research...

179

ARM - Facility News Article  

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than any other quarter on record-961 The U.S. Department of Energy requires national user facilities to report facility use by total visitor days and facility to track actual...

180

Field Campaign Guidelines (ARM Climate Research Facility)  

Science Conference Proceedings (OSTI)

The purpose of this document is to establish a common set of guidelines for the Atmospheric Radiation Measurement (ARM) Climate Research Facility for planning, executing, and closing out field campaigns. The steps that guide individual field campaigns are described in the Field Campaign Tracking database tool and are tailored to meet the scope of each specific field campaign.

Voyles, JW

2011-01-17T23:59:59.000Z

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181

ARM - Facility News Article  

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Facility News Data Collection from Mobile Facility on Gan Island Suspended Local weather balloon launch volunteers pose with the AMF team on Gan Island after completing their...

182

ARM - Facility News Article  

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approximately 22,500 square kilometers, or the approximate area of a modern climate model grid cell. Centered around the SGP Central Facility, these extended facilities are...

183

ARM - Facility News Article  

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External Data Center Gets a Big Boost External Data Center Gets a Big Boost Bookmark and Share In addition to providing database support to the ARM Program, the External Data Center (XDC) identifies and acquires "external" sources of data to augment the data being generated within the program. These external data are transformed from their original received form to data sets of greater value to ARM researchers. These transformations may involve subsetting, merging distinct sets, changing format, averaging, or applying algorithms to produce new geophysical parameters. Recently, a locally attached storage system was added to the XDC production server, removing a significant bottleneck in the data transfer process and improving throughput by more than a factor of two. The storage area on the XDC server is used to collect intermediate files

184

ARM - Facility News Article  

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Battle With Bugs Nearly Over Thanks to New Radar Battle With Bugs Nearly Over Thanks to New Radar Bookmark and Share The new W-band ARM cloud radar, or WACR, provides improved sensitivity for detecting tiny objects in the atmosphere to an altitude of 5 km. The instrument's antenna is located adjacent to the millimeter wave cloud radar (MMCR) antenna on top of the MMCR shelter; the rest of the unit is located inside (inset). The new W-band ARM cloud radar, or WACR, provides improved sensitivity for detecting tiny objects in the atmosphere to an altitude of 5 km. The instrument's antenna is located adjacent to the millimeter wave cloud radar (MMCR) antenna on top of the MMCR shelter; the rest of the unit is located inside (inset). The main purpose of the millimeter wavelength cloud radar (MMCR) is to

185

ARM - Facility News Article  

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Arctic Winter Water Vapor IOP Starts; Microwave Radiometer Profiler Arctic Winter Water Vapor IOP Starts; Microwave Radiometer Profiler Deployed Bookmark and Share Some of the instruments collecting data during the Arctic Winter Water Vapor IOP include ARM's microwave radiometer profiler (left) and microwave radiometer (right), and NOAA's ground-based scanning radiometer (middle). Some of the instruments collecting data during the Arctic Winter Water Vapor IOP include ARM's microwave radiometer profiler (left) and microwave radiometer (right), and NOAA's ground-based scanning radiometer (middle). The Arctic Winter Water Vapor Intensive Operational Period (IOP), a collaborative effort with the National Oceanic and Atmospheric Administration (NOAA) Environmental Technology Laboratory, began on March 10 in Barrow, Alaska. The major goal of the Arctic Winter Water Vapor IOP

186

ARM - Facility News Article  

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Aircraft Comes ALIVE During Field Campaign at the Southern Great Plains Aircraft Comes ALIVE During Field Campaign at the Southern Great Plains Bookmark and Share Outside the hangar in Ponca City, Oklahoma, the optical head of the AATS-14 (inset) can be seen as the white dome on the roof of the Jetstream-31 aircraft Outside the hangar in Ponca City, Oklahoma, the optical head of the AATS-14 (inset) can be seen as the white dome on the roof of the Jetstream-31 aircraft Researchers from ARM Program and National Aeronautical and Space Administration (NASA) took to the skies in September for an 11-day Aerosol Lidar Validation Experiment (ALIVE) at the ARM Southern Great Plains (SGP) site. The ALIVE field campaign was conducted to collect airborne remote sensing data on atmospheric aerosols for validation studies of the Raman

187

ARM - Facility News Article  

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Bigger, Better Cessna Ready to Record Aerosol and Carbon Cycle Data Bigger, Better Cessna Ready to Record Aerosol and Carbon Cycle Data Bookmark and Share Replacing the smaller Cessna 172, the new turbo-charged Cessna 206 prepares for departure to Ponca City, Oklahoma, where it will be managed by Greenwood Aviation. Replacing the smaller Cessna 172, the new turbo-charged Cessna 206 prepares for departure to Ponca City, Oklahoma, where it will be managed by Greenwood Aviation. To meet new requirements in the airborne aerosol and carbon-cycle measurements taken over ARM's Southern Great Plains (SGP) site, a new Cessna Turbo 206 is replacing the smaller Cessna 172XP. The new aircraft has been contracted by ARM to conduct combined in situ aerosol profiling and airborne carbon measurements for the next two years. Airborne measurements of carbon cycle trace gases at the SGP will provide data to

188

ARM - Facility News Article  

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November 30, 2008 Facility News Site Operations Centralized Through New Tracking System Bookmark and Share Tracking over 300 instrument systems distributed around the world is a...

189

ARM - Facility News Article  

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instruments and equipment, as well as local facilities such as hospitals, groceries, and gas stations. Next steps will involve such items as securing access to power from nearby...

190

ARM - Facility News Article  

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15 and 21 will remain intact, along with the Central Facility (C1) near Lamont. Instrumentation at the remaining sites will be consolidated into the new, smaller footprint....

191

ARM - Facility News Article  

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August 2, 2013 Facility News 2014 Funding Opportunity Available for Early Career Scientists The U.S. Department of Energy's Office of Science is now accepting research...

192

ARM - Facility News Article  

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October 31, 2008 Facility News Breakthrough User Interface Delivers Statistical Views of Data With its "drill-down" preview feature, the Statistical Browser is the first example...

193

ARM - Facility News Article  

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June 30, 2007 Facility News New Radar Wind Profiler Joins AMF Instrument Suite in Germany The 1290 MHz wind profiler (foreground) joins the eddy correlation system (background)...

194

ARM - SGP Boundary Facility  

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facilities-located at Hillsboro, Kansas; Morris, Oklahoma; Purcelll, Oklahoma and Vici, Oklahoma (north, east, south and west, respectively)-marked the approximate midpoint of...

195

ARM - NSA Barrow Facility  

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Barrow Facility Barrow Facility NSA Related Links Facilities and Instruments Barrow Atqasuk ES&H Guidance Statement Operations Science Field Campaigns Visiting the Site Images Information for Guest Scientists Contacts NSA Barrow Facility Location: 71° 19' 23.73" N, 156° 36' 56.70" W Altitude: 8 meters The Barrow facility was dedicated in July 1997 and chosen because the Arctic is particularly sensitive to climate changes. Barrow is located at the northernmost point in the United States, 330 miles north of the Arctic Circle. Also known as the Top of the World, Barrow is Alaska's largest Eskimo village (home to 4,581 people). Tax revenue from the Slope's oil fields pay for services borough wide, and natural gas is used to heat homes and generate electricity in Barrow. Many residents, however, maintain

196

ARM - Facility News Article  

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28, 2005 [Facility News] 28, 2005 [Facility News] Readiness of New Lidar Evaluated at Southern Great Plains Site Bookmark and Share Aircraft for the Boundary Layer CO2 Intensive Operational Period will fly over the SGP Central Facility using both spirals and racetrack patterns. Data will be collected under a variety of cloud and meteorological conditions. Aircraft for the Boundary Layer CO2 Intensive Operational Period will fly over the SGP Central Facility using both spirals and racetrack patterns. Data will be collected under a variety of cloud and meteorological conditions. As the focus of the Boundary Layer Carbon Dioxide (CO2) Intensive Operational Period (IOP) starting in March, science collaborators at ITT Industries and the National Aeronautics and Space Administration (NASA)

197

ARM - Facility News Article  

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15, 2004 Facility News Education and Outreach Program Visits Schools in the Tropics Bookmark and Share A native islander is interviewed in his natural setting at Manus Island as...

198

ARM - Facility News Article  

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24, 2011 Facility News New Radar is a "Can't Miss" on Manus Resting atop a 60-foot tower, the new radar's antenna is visible above the treetops from most vantage points on...

199

ARM - Facility News Article  

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Exchange Researchers installed a continuous 222Rn monitor at the base of the 60-meter tower at the SGP Central Facility. A sampling tube connected to the tower supplies air to...

200

ARM - Facility News Article  

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15, 2009 Facility News Internet Upgrade Speeds Data Transfer from Tropics Bookmark and Share View this video to see how the millimeter wave cloud radar works. View this video to...

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201

ARM - Facility News Article  

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August 15, 2004 Facility News SuomiNet-type Instruments Tested and Ready for Tropics Bookmark and Share The SuomiNet software integrates a network of global positioning systems...

202

ARM - Facility News Article  

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Capability Added to Cloud Radar As a prelude to great things to come throughout the user facility, a new 95-gigahertz scanning W-band cloud radar was installed in late...

203

ARM - Facility News Article  

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September 30, 2009 Facility News Climate Change Lesson Plan Selected for MyHealthySchool.com Bookmark and Share A lesson plan about climate change in the Arctic was selected by...

204

ARM - Facility News Article  

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DOE achieve its goal to provide open access to experimental data, as set forth in the DOE 2011 Strategic Plan. As a scientific user facility serving researchers both in the United...

205

ARM - Facility News Article  

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Mission Under Control: Scientists Simulate Upcoming Field Campaign Mission Under Control: Scientists Simulate Upcoming Field Campaign Bookmark and Share The Egrett will fly in stacked formations with the Proteus during the upcoming Tropical Warm Pool International Cloud Experiment. This flight pattern will allow simultaneous sampling of the upper and lower parts of the cirrus anvils as well as remote measurements. The Egrett will fly in stacked formations with the Proteus during the upcoming Tropical Warm Pool International Cloud Experiment. This flight pattern will allow simultaneous sampling of the upper and lower parts of the cirrus anvils as well as remote measurements. Between September 7-9, ARM researchers and international collaborators involved in flight operations for the Tropical Warm Pool International Cloud Experiment, or TWP-ICE, met at Sandia National Laboratories to

206

ARM - Facility News Article  

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Infrared Sky Imager Takes a Shot in the Dark Infrared Sky Imager Takes a Shot in the Dark Bookmark and Share Processed images from the Infrared Sky Imager are limited to a field-of-view (FOV) of 160 degrees to eliminate the problems inherent in retrievals along the horizon line. This is where any cloud signal is masked by the integrated infrared signal along the long path length through the atmosphere. Processed images from the Infrared Sky Imager are limited to a field-of-view (FOV) of 160 degrees to eliminate the problems inherent in retrievals along the horizon line. This is where any cloud signal is masked by the integrated infrared signal along the long path length through the atmosphere. Imaging technologies help scientists correlate and compare data retrieved by sensors and lasers against visual data. One such technology used by ARM

207

ARM - Facility News Article  

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New Web Interface for Solar Tracking is Right on Target New Web Interface for Solar Tracking is Right on Target Bookmark and Share New solar tracking interface helps eliminate judgment calls and create an objective assessment of tracker performance each day. New solar tracking interface helps eliminate judgment calls and create an objective assessment of tracker performance each day. At ARM's Tropical Western Pacific site, radiometer sensors mounted on solar trackers provide critical radiation balance measurements. If a tracker is off even a small amount, the data from the diffuse radiometers and the normal incidence pyrheliometer (NIP) are worthless, and therefore the overall combined data coming from the site's other instruments is less valuable. As part of an investigation into performance problems with the

208

ARM - Facility News Article  

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Conditions Range from Classic to Record-Breaking as Field Campaign Conditions Range from Classic to Record-Breaking as Field Campaign Concludes Bookmark and Share Closely resembling a rice paddy, this soggy cotton field near Chickasha, Oklahoma, on June 27 exemplifies the atypical surface conditions throughout the CLASIC experiment domain as the campaign drew to a close. (Photo courtesy Tom Jackson, USDA.) Closely resembling a rice paddy, this soggy cotton field near Chickasha, Oklahoma, on June 27 exemplifies the atypical surface conditions throughout the CLASIC experiment domain as the campaign drew to a close. (Photo courtesy Tom Jackson, USDA.) Not even record-setting precipitation could dampen the spirits of the Cloud and Land Surface Interaction Campaign (CLASIC) science team as the campaign at the ARM Southern Great Plains (SGP) site drew to a close on June 30.

209

ARM - Facility News Article  

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New 3-Channel Microwave Radiometer Deployed at Southern Great Plains Site New 3-Channel Microwave Radiometer Deployed at Southern Great Plains Site Bookmark and Share Newly installed at the SGP site, the scanning 3-channel microwave radiometers have different sized lenses to accommodate both the K-band and W-band frequency. The difference in lens size is necessary to achieve similar field of views. Newly installed at the SGP site, the scanning 3-channel microwave radiometers have different sized lenses to accommodate both the K-band and W-band frequency. The difference in lens size is necessary to achieve similar field of views. Throughout ARM, measurements of precipitable water vapor and liquid water path are provided by microwave radiometers. These measurements are essential for improving scientific understanding of clouds and how they are

210

ARM - Facility News Article  

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Kids Learn About Weather at Day Camps in June Kids Learn About Weather at Day Camps in June Bookmark and Share To earn their Weather Badges, Girl Scouts rotated through a variety of learning stations, including one featuring instruments for measuring atmospheric properties. Campers blew air onto the radiation shields surrounding the temperature and humidity sensor to observe any changes recorded by the instrument. To earn their Weather Badges, Girl Scouts rotated through a variety of learning stations, including one featuring instruments for measuring atmospheric properties. Campers blew air onto the radiation shields surrounding the temperature and humidity sensor to observe any changes recorded by the instrument. On June 6, education and outreach staff from the ARM Southern Great Plains (SGP) site spent four hours helping local Girl Scouts earn their Weather

211

ARM - Facility News Article  

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Wildlife Challenges Lead to Wireless Solutions Wildlife Challenges Lead to Wireless Solutions Bookmark and Share As reported in late 2006, a total precipitation sensor (TPS) was installed near the ARM North Slope of Alaska (NSA) site in Barrow, to provide measurements of boundary layer (surface to 1000-m altitude) environmental conditions. After falling victim to curious and possibly hungry lemmings and other wildlife in the area, the fiber optic cable used to transfer data from the sensor to the Great White instrument shelter was recently replaced with a wireless data acquisition system and virtual access port. This not only negates the possibility of further cable damage from our furry friends, but reduces the potential for water-related damage during peak melting season and allows remote access for monitoring the data.

212

ARM - About ARM  

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ARM About Become a User Recovery Act Mission FAQ History Organization Participants Facility Statistics Forms Contacts Facility Documents ARM Management Plan (PDF, 335KB) Field...

213

ARM - Facility News Article  

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November 3, 2010 [Facility News] November 3, 2010 [Facility News] Arctic Campaign Cut Short; Spring Restart A Possibility Bookmark and Share An unfortunate incident in the early stages of the Arctic Lower Troposphere Observed Structure (ALTOS) field campaign at Oliktok Point on the North Slope of Alaska has resulted in the campaign being terminated. The primary in situ measurement platform for the campaign was a tethered balloon for making ascents through the clouds with instruments that measure cloud microphysical properties, while ground-based instruments simultaneously collect additional data. During one of the balloon's initial flights, its primary and secondary tethers broke. A radio-controlled cut-down device was activated to bring down the balloon, which landed with its instrument

214

ARM - Facility News Article  

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6, 2007 [Facility News] 6, 2007 [Facility News] Radiative Heating in Unexplored Bands Campaign Begins Today Bookmark and Share This chart shows the spectral and height dependence of the infrared cooling rates for a mid-latitude summer profile. Note that the majority of the infrared cooling in the middle and upper tropsphere occurs in spectral regions that RHUBC will investigate. This chart shows the spectral and height dependence of the infrared cooling rates for a mid-latitude summer profile. Note that the majority of the infrared cooling in the middle and upper tropsphere occurs in spectral regions that RHUBC will investigate. In conjunction with other scientific activities taking place during International Polar Year 2007-2008, today (February 26) an international research team begins a three-week field campaign in Barrow, Alaska. The

215

ARM - Facility News Article  

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31, 2004 [Facility News] 31, 2004 [Facility News] New Technique Used to Measure Ice and Liquid in Clouds Bookmark and Share A mirror angled at 45 degrees inside the "winglet" viewing port deflects sunlight to the optical fiber and into the detector housed inside the "Great White" shelter at Barrow. A mirror angled at 45 degrees inside the "winglet" viewing port deflects sunlight to the optical fiber and into the detector housed inside the "Great White" shelter at Barrow. Difficulties in modeling the effects of clouds on climate arise largely from the insufficient number of observations needed to sufficiently understand cloud processes. Science collaborators at the National Oceanic and Atmospheric Administrations (NOAA) Aeronomy Laboratory have developed a

216

ARM - Facility News Article  

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January 31, 2010 [Facility News] January 31, 2010 [Facility News] STORMVEX Science Team Confirms Site Plans; Outreach Begins at Weather Summit Bookmark and Share Dr. Ashley Williamson introduces the STORMVEX campaign to Weather Summit attendees. Dr. Ashley Williamson introduces the STORMVEX campaign to Weather Summit attendees. In late January, meteorologists from a dozen major news markets across the country gathered in Steamboat Springs, Colorado, for an annual event called the "Weather Summit" where they received a preview of the Storm Peak Lab Cloud Property Validation Experiment, or STORMVEX, field campaign scheduled to begin next fall. Meanwhile, down the hall, the STORMVEX science team reviewed the status of the campaign components thus far, discussed remaining instrument issues, and made assignments to complete a

217

ARM - Facility News Article  

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July 31, 2010 [Facility News] July 31, 2010 [Facility News] Containers for Aerosol Observing Systems Pass Acceptance Testing Bookmark and Share Left to right: Pat Maloy, Stephen Springston, and Mike Ritsche inspect the AMF2 AOS container. They checked for proper locations of unistrut on the ceiling, walls and floor for connecting racks and other equipment, as well as functioning of HVAC units and infrared heaters (above Mike's head). Red lights are required for nighttime ship operations, and the hatch in ceiling will accommodate the aerosol stack. Left to right: Pat Maloy, Stephen Springston, and Mike Ritsche inspect the AMF2 AOS container. They checked for proper locations of unistrut on the ceiling, walls and floor for connecting racks and other equipment, as well as functioning of HVAC units and infrared heaters (above Mike's head). Red

218

ARM - Facility News Article  

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January 31, 2006 [Facility News] January 31, 2006 [Facility News] Media Day Kicks Off Tropical Cloud Study in Australia Bookmark and Share While on the ground, the Twin Otter (left) and Proteus (right) are sharing hangar space at the Royal Australian Air Force base for the duration of TWP-ICE field operations. While on the ground, the Twin Otter (left) and Proteus (right) are sharing hangar space at the Royal Australian Air Force base for the duration of TWP-ICE field operations. Two days after a highly successful media day, January 21 marked the official start of flight operations for the Tropical Warm Pool International Cloud Experiment in Darwin, Australia. Science team members are guiding the aircraft missions from the Bureau of Meteorology's Forecast Center in Darwin; the rest of the experiment activities are being managed

219

ARM - Facility News Article  

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31, 2006 [Facility News] 31, 2006 [Facility News] Comprehensive Instrument Validation Campaign Concludes Bookmark and Share As the Aqua satellite moves along, the AIRS mirror scans a "swath" across the Earth's surface and directs infrared energy into the instrument. This energy is separated into wavelengths, which are transferred from Aqua to computers on the ground for additional processing. (Source: http://airs.jpl.nasa.gov As the Aqua satellite moves along, the AIRS mirror scans a "swath" across the Earth's surface and directs infrared energy into the instrument. This energy is separated into wavelengths, which are transferred from Aqua to computers on the ground for additional processing. (Source: http://airs.jpl.nasa.gov After almost four years, the last soundings in the final phase of the

220

ARM - Facility News Article  

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January 15, 2006 [Facility News] January 15, 2006 [Facility News] Location, Location, Location... Field Campaign Focuses on Latitude Effects Bookmark and Share A scintillometer was used to detect atmospheric optical disturbances-called scintillations-caused by temperature, pressure and humidity. The instrument emits light from two transmitters, shown at left. The light traverses the local atmosphere, perturbed by density fluctuations. Some of the light enters the receiver, shown at right. (Image from Scintec at www.scintec.com.) A scintillometer was used to detect atmospheric optical disturbances-called scintillations-caused by temperature, pressure and humidity. The instrument emits light from two transmitters, shown at left. The light traverses the local atmosphere, perturbed by density fluctuations. Some of the light

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221

ARM - Facility News Article  

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29, 2012 [Facility News] 29, 2012 [Facility News] Workshop Identifies Critical Climate Science Challenges Bookmark and Share This DOE report summarizes a two-and-a-half day workshop held between U.S. and European collaborators to review outstanding climate change science questions related to clouds, aerosols and precipitation, and the observational strategies for addressing them. This DOE report summarizes a two-and-a-half day workshop held between U.S. and European collaborators to review outstanding climate change science questions related to clouds, aerosols and precipitation, and the observational strategies for addressing them. Clouds and aerosols remain as major sources of uncertainty in computer models of Earth systems. In large part, this uncertainty is due to a lack

222

ARM - Facility News Article  

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August 31, 2008 [Facility News] August 31, 2008 [Facility News] Phase 2 of Orbiting Carbon Observatory Field Campaign Begins Bookmark and Share A camera, weather station, and sun tracker with a protective dome are located on the roof of the fully automated FTS mobile laboratory. Inside the shelter, the spectrometer receives the reflected solar beam from the sun tracker, while the main computer system operates all the instruments and acquires the data. A camera, weather station, and sun tracker with a protective dome are located on the roof of the fully automated FTS mobile laboratory. Inside the shelter, the spectrometer receives the reflected solar beam from the sun tracker, while the main computer system operates all the instruments and acquires the data. The Orbiting Carbon Observatory, or OCO, is a National Aeronautics and

223

ARM - Facility News Article  

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30, 2006 [Facility News] 30, 2006 [Facility News] Precipitation Sensor on Duty at North Slope of Alaska Bookmark and Share The precipitation sensor was installed about 5 feet above the surface on the piling in the foreground, with power connected through a nearby Climate Reference Network box (background). The precipitation sensor was installed about 5 feet above the surface on the piling in the foreground, with power connected through a nearby Climate Reference Network box (background). Extremely low temperatures and humidity in the northern hemisphere make it very difficult to obtain accurate precipitation measurements. However, because the impacts of climate change are shown to occur most rapidly in the sensitive Arctic environment, these measurements are needed for characterizing boundary layer (surface to 1000-m altitude) conditions and

224

ARM - Facility News Article  

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August 6, 2009 [Facility News] August 6, 2009 [Facility News] Research Team Publishes Results from In-Depth Study of Sahel Climate System Bookmark and Share The Sahel region of West Africa has experienced long-term drought accompanied by profound socioeconomic consequences over the past 30 years. It is a favored location for the development of tropical easterly waves that may generate hurricanes. The Sahel region of West Africa has experienced long-term drought accompanied by profound socioeconomic consequences over the past 30 years. It is a favored location for the development of tropical easterly waves that may generate hurricanes. In a series of eight papers published between 2008 and 2009 in the Journal of Geophysical Research-Atmospheres, an international team of researchers

225

ARM - Publications: Science Team Meeting Documents  

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LASE Characterization of Water Vapor, Aerosol, and Cloud Distributions Over LASE Characterization of Water Vapor, Aerosol, and Cloud Distributions Over the ARM Southern Great Plains Central Facility During AFWEX Ismail, S. (a), Ferrare, R.A. (a), Browell, E.V. (a), Kooi, S.A. (b), Brasseur L.H. (b), Clayton, M.B. (b), Brackett, V. (b), Goldsmith, J.E.M. (c), Whiteman, D.N. (d), and Barrick, J. (a), NASA Langley Research Center (a), SAIC Inc., Hampton, Virginia (b), Sandia National Laboratories (c), NASA Goddard Space Flight Center (d) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting NASA's Lidar Atmospheric Sensing Experiment (LASE) system was operated during the ARM/FIRE Water Vapor Experiment (AFWEX) to characterize the upper tropospheric water vapor field over the ARM Center Facility (CF) as part of the third Water Vapor Intensive Observation Period (WVIOP3). LASE

226

ARM - Publications: Science Team Meeting Documents  

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Comparison of Aerosol Properties Within and Above the Atmospheric Boundary Comparison of Aerosol Properties Within and Above the Atmospheric Boundary Layer at the ARM SGP Site Delle Monache, L.(a), Perry, K.D.(a), and Cederwall, R.T.(b), San Jose State University (a), Lawrence Livermore National Laboratory (b) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting The objective of this work is to determine under what conditions, if any, measurements of aerosol properties made at the surface at the ARM SGP Central Facility are representative of aerosol properties within the column of air above the surface. This is important in assessing the value of data collected at the ARM Aerosol Observation System (AOS) for developing and diagnosing cloud and radiation parameterizations involving aerosol properties within and above the atmospheric boundary layer (ABL). The study

227

ARM - Publications: Science Team Meeting Documents  

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Comparison of Stratus Cloud Optical Depths Retrieved from Surface and GOES Comparison of Stratus Cloud Optical Depths Retrieved from Surface and GOES Measurements over the SGP ARM Central Facility Dong, X., and Smith, W.L. Jr., Analytical Services and Materials, Inc.; Minnis, P., NASA Langley Research Center Eighth Atmospheric Radiation Measurement (ARM) Science Team Meeting For reliable application of satellite datasets in cloud process and single column models, it is important to have a reasonable estimate of the errors in the observed cloud properties. When properly used, ground-based instruments can provide a cloud truth dataset for estimating errors in the satellite products. Data taken during the spring 1994 ARM Intensive Observation Period (IOP), ARM Enhanced Shortwave Experiment (ARESE), and SUbsonic Aircraft Contrail and Cloud Effects Special Study (SUCCESS) are

228

ARM - Publications: Science Team Meeting Documents  

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GPS Measured Water Vapor Variability at the ARM SGP CF GPS Measured Water Vapor Variability at the ARM SGP CF Braun, J. (a), Rocken, C. (a), and Schmid, B. (b), UCAR (a), BAER (b) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting Ground based Global Positioning System (GPS) stations can measure precipitable water vapor (PWV) and slant water vapor (SWV). SWV is the integrated amount of water vapor along the slant path from the GPS transmitter to the station. The ARM program has sponsored the University Corporation for Atmospheric Research (UCAR) to install and operate a network of single frequency GPS receivers at the Southern Great Plains (SGP) Central Facility (CF). Fourteen stations were installed in 1999, and an additional nine stations in 2000. The entire network covers approximately 40 square kilometers roughly centered around the SGP CF. This

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ARM - Publications: Science Team Meeting Documents  

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An Overview of Water Vapor IOP (WVIOP) 2000 and ARM/FIRE Water Vapor An Overview of Water Vapor IOP (WVIOP) 2000 and ARM/FIRE Water Vapor EXperiment (AFWEX) Tobin, D., Revercomb, H., and Turner, D.D., University of Wisconsin-Madison Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting WVIOP 2000 and AFWEX, two field experiments with focus on the accuracy of ARM water vapor measurements, have recently been conducted. WVIOP 2000, the third in a series of WVIOPs which have studied the accuracy of lower tropospheric water vapor measurements, ran from 18 September to 8 October 2000 and consisted of ground based operations primarily out of the SGP central facility. AFWEX was an interagency experiment with the primary goal of assessing the accuracy of upper level (~8-12 km) water vapor measurements. It was conducted from 27 November to 15 December 2000 and

230

ARM - Publications: Science Team Meeting Documents  

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Infrared Cloud Imager (ICI) Measurements of Cloud Statistics During the Infrared Cloud Imager (ICI) Measurements of Cloud Statistics During the 2003 Cloudiness Intercomparison Campaign Gregory, L., Wagener, R., Ma, L.L., and Cialella, A., Brookhaven National Laboratory Fourteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting The process of creating ARM data-streams from external data sources is described from identification of scientific need as determined by the science working groups to implementation and documentation, which involves ARM's task management tools: Engineering Change Request/Order, Baseline Change Request, Data Object Design/Birth of a Data Stream, eXternal Data Stream documentation. Pitfalls and typical delays are illustrated with recently completed data-stream ingests. Some procedural changes are

231

ARM - Publications: Science Team Meeting Documents  

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Comparison of Daily Broadband Surface Albedos Measured at Six Extended Comparison of Daily Broadband Surface Albedos Measured at Six Extended Facilities in the ARM Southern Great Plains Cloud and Radiation Testbed Hamm, K.G., University of Oklahoma Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting An analysis of time series of daily hemispherical broadband surface albedo for 1998-1999 from six ARM Extended Facilities has been performed. The results show that the mean annual albedo differs by as much as 30% among the six sites. The annual range of daily albedos also varies among the sites. For example, albedos measured at the tallgrass prairie near Pawhuska, OK show a range of daily albedo between 0.15 and 0.20 for 1998, while daily albedos measured at a grazed pasture near Cordell, OK for the same time period have a range between 0.17 and 0.24 (or 40% higher than at

232

ARM - Publications: Science Team Meeting Documents: Cloud Radiative Forcing  

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Cloud Radiative Forcing at the ARM Climate Research Facility: Part 2. The Cloud Radiative Forcing at the ARM Climate Research Facility: Part 2. The Vertical Redistribution of Radiant Energy by Clouds. Mace, Gerald University of Utah Benson, Sally University of Utah Kato, Seiji Hampton University/NASA Langley Research Center Documentation with data of the effects of clouds on the radiant energy balance of the surface and atmosphere represent a critical shortcoming in the set of observations that are needed to ascertain the validity of model simulations of the earth's climate. While clouds are known to cool the climate system from TOA radiation budget studies, the redistribution of energy between the surface and atmosphere and within the atmosphere by clouds has not been examined in detail. Using data collected at the Atmospheric Radiation Measurement Program (ARM) Southern Great Plains (SGP)

233

ARM - Publications: Science Team Meeting Documents  

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Water Vapor Intensive Operating Periods: General Results, Status and Plans Water Vapor Intensive Operating Periods: General Results, Status and Plans Revercomb, H.E., Tobin, D.C., Knuteson, R.O., and Feltz, W.F., University of Wisconsin-Madison; Turner, D.D., Pacific Northwest National Laboratory Ninth Atmospheric Radiation Measurement (ARM) Science Team Meeting Accurate measurements of atmospheric water vapor are very important for climate research and monitoring. Unexpectedly large uncertainties of sonde water vapor observations implied by Atmospheric Radiation Measurement (ARM) Program's radiation measurements led to special Water Vapor Intensive Observation Periods (IOPs) conducted in 1996 and 1997 at the Southern Great Plains (SGP) central facility. The goal was to use the complement of ARM advanced instrumentation to better quantify the problem and to find ways of

234

ARM - Publications: Science Team Meeting Documents  

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Shortwave and Longwave Flux and Cooling Rate Profiles for the ARM Central Shortwave and Longwave Flux and Cooling Rate Profiles for the ARM Central Facility Clough, S.A. (a), Delamere, J.S. (a), Mlawer, E.J. (a), Cederwall, R.T. (b), Revercomb, H. (c), Tobin, D. (c), Turner, D.D. (c), Knuteson, R.O. (c), Michalsky, J.J. (d), Kiedron, P.W. (d), Ellingson, R.G. (e), Krueger, S.K. (f), Mace, G.G. (f), Shippert, T. (g), and Zhang, M.H.(h), Atmospheric and Environmental Research, Inc. (a), Lawrence Livermore National Laboratory (b), University of Wisconsin-Madison (c), State University of New York, Albany (d), University of Maryland (e), University of Utah (f), Pacific Northwest National Laboratory (g), State University of New York, Stony Brook (h) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting Accurate representations of the cooling rate profile, the surface flux and

235

ARM - Publications: Science Team Meeting Documents  

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LASE Characterization of Water Vapor Over the ARM SGP During AFWEX LASE Characterization of Water Vapor Over the ARM SGP During AFWEX Ismail, S.(a), Ferrare, R.A.(a), Browell, E.V.(a), Kooi, S.A.(b), Brasseur, L.H.(b), Clayton, M.B.(b), Brackett, V.(b), Turner, D.D. (c), Goldsmith, J.E.M.(d), Whiteman, D.N.(e), Barrick, J.(a), Sachse, G.(a), Diskin, G.(a), Podolske, J.(f), Schmidlin, F.J.(g), and Bosenberg, J.(h), NASA Langley (a), SAIC (b), Pacific Northwest National Laboratory (c), Sandia National Laboratories (d), NASA Goddard (e), NASA Ames (f), NASA Wallops (g), Max Planck Institute (h) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting NASA's Lidar Atmospheric Sensing Experiment (LASE) system was operated during the ARM/FIRE Water Vapor Experiment (AFWEX) to characterize the upper tropospheric (UT) water vapor field over the ARM Center Facility (CF)

236

ARM - Publications: Science Team Meeting Documents  

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Spatial Hetergeneity in Mid-Summer Fluxes of Carbon, Water and Energy in Spatial Hetergeneity in Mid-Summer Fluxes of Carbon, Water and Energy in Agriculutural Plots Near the SGP Central Facility Fischer, M.L.(a), Billesbach, D.(b), Berry, J.(c), Riley, W.R.(a), and Torn, M.S.(a), Lawrence Berkeley National Laboratory (a), University of Nebraska (b), Carnegie Institution of Washington (c) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting Patterns of land use and management are likely to dominate the spatial heterogeneity in cycles of energy, carbon, and water in ecosystems of the Southern Great Plains (SGP). We report recent progress on measuring and modeling spatial heterogeneity in land surface-atmosphere exchange for different crops in the footprint of a flux system mounted on the ARM SGP Central Facility 60 m tower. The first phase of our the "Portable Flux

237

ARM - Publications: Science Team Meeting Documents  

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Evaluating the NCEP Global Forecast Model Clouds Evaluating the NCEP Global Forecast Model Clouds Lazarus, S.M. (a), Krueger, S.K. (a), Jenkins, M.A. (a), and Pan, H.-L. (b), University of Utah (a), National Centers for Environmental Prediction (b) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting As part of a collaborative effort with the National Center for Environmental Prediction (NCEP), the University of Utah is now archiving (daily) column data from the NCEP Medium Range Forecast (MRF) model. Data are collected for 8 sites, 4 of which directly coincide with ARM facilities at Manus, Nauru, Barrow, and the Southern Great Plains (SGP) Central Facility (CF). The bevy of observational data at these locations offers a unique opportunity to evaluate model performance. Because cloud feedback

238

Facility worker technical basis document  

SciTech Connect

This report documents the technical basis for facility worker safety to support the Tank Farms Documented Safety Analysis and described the criteria and methodology for allocating controls to hazardous conditions with significant facility worker consequences and presents the results of the allocation.

EVANS, C.B.

2003-03-21T23:59:59.000Z

239

ARM - Publications: Science Team Meeting Documents: Publication...  

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Publication Trends of ARM Research Troyan, David Brookhaven National Laboratory This study summarizes the publication record of ARM research. Items of all types listed in the ARM...

240

FACILITY WORKER TECHNICAL BASIS DOCUMENT  

Science Conference Proceedings (OSTI)

This technical basis document was developed to support RPP-13033, ''Tank Farms Documented Safety Analysis (DSA). It describes the criteria and methodology for allocating controls to hazardous conditions with significant facility worker (FW) consequence and presents the results of the allocation. The criteria and methodology for identifying controls that address FW safety are in accordance with DOE-STD-3009-94, ''Preparation Guide for US Department of Energy Nonreactor Nuclear Facility Documented Safety Analyses''.

SHULTZ, M.V.

2005-03-31T23:59:59.000Z

Note: This page contains sample records for the topic "facility documents arm" from the National Library of EnergyBeta (NLEBeta).
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241

ARM - Publications: Science Team Meeting Documents  

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Preliminary Analysis of Horizontal Inhomogeneity for ARESE II Clouds Preliminary Analysis of Horizontal Inhomogeneity for ARESE II Clouds Marshak, A. (a), Wiscombe, W.J. (b), Davis, A.B. (c), and Pilewskie, P. (d), UMBC/JCET (a), NASA/GSFC (b), LANL (c), NASA/Ames (d) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting ARM Enhanced Shortwave Experiment (ARESE) II was conducted at the SGP site from February 21 through April 15, 2000. The identical set of radiometers simultaneously measured the broadband and narrowband fluxes, as well as spectral fluxes and radiances from the aircraft flying above clouds and on the ground. To escape sampling problems with only one aircraft flying a daisy pattern over the central facility, the whole experiment was focused on optically thick stratocumulus clouds. However, even heavy stratus clouds

242

ARM - Publications: Science Team Meeting Documents  

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Applications of the Aerosonde at NSA Applications of the Aerosonde at NSA Curry, J.A. and Holland, G.J., University of Colorado Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting The first ARM Aerosonde flights at Barrow in April 1999 were not successful owing to the aircraft's inability to fly under severe icing conditions. However, we were sufficiently encouraged by these initial flights to pursue further developments to make feasible Aerosonde flights in the Arctic. NSF has funded a major project to establish a long-term Aerosonde facility based in Barrow. Extensive research is underway on the topic of icing mitigation. A limited but successful mission was undertaken in Barrow during August 2000. In the coming year, flights are planned for April, August 2001. We hope to be able to fly the originally proposed

243

ARM - Publications: Science Team Meeting Documents  

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Improved Methods for Broadband Outdoor Radiometer Calibration (BORCAL) Improved Methods for Broadband Outdoor Radiometer Calibration (BORCAL) Wilcox, S.M., Andreas, A.M., Reda, I., and Myers, D.R., National Renewable Energy Laboratory Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting The ARM Program deploys approximately 100 radiometers to measure broadband solar radiation at stations in the North Slope of Alaska (NSA), Southern Great Plains (SGP), and Tropical Western Pacific (TWP) Cloud and Radiation Testbed (CART) sites. Two calibration events performed at the SGP Radiometer Calibration Facility (RCF) each year maintain radiometer calibration traceability to the World Radiometric Reference and assure reliable and uniform measurements at each CART site. Calibrations are performed using the Radiometer Calibration and Characterization (RCC)

244

ARM - Publications: Science Team Meeting Documents  

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A High Spectral Resolution Lidar for the Arctic - A Progress Report A High Spectral Resolution Lidar for the Arctic - A Progress Report Eloranta, E.W., Razenkov, I., Kuehn, R., Holz, R., Hedrick, J., and Garcia, J., University of Wisconsin-Madison Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting The University of Wisconsin is constructing a High Spectral Resolution Lidar for deployment in the Arctic. It is designed to operate as an internet appliance and require minimal attention from an onsite attendent. It will provide continuous well calibrated profiles of optical depth, cloud phase and backscatter cross sections. Deployment at the Point Barrow ARM facility is proposed. This poster will describe progess to date. Initial testing has demonstrated that the shared transmitter/reciever telescope design functions properly. While this approach eliminates alignment

245

ARM - Publications: Science Team Meeting Documents  

NLE Websites -- All DOE Office Websites (Extended Search)

Mining the ARM Data Set: A WWW-Staged Prototype Relational Database of ARM Data Mace, G.G. and Hudach, D.P., University of Utah Twelfth Atmospheric Radiation Measurement (ARM)...

246

ARM - Publications: Science Team Meeting Documents  

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Measurements at the DOE ARM NSA Site Dong, X. and Mace, G.G., University of Utah Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting The Arctic plays...

247

ARM - Publications: Science Team Meeting Documents  

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Radiation Measurement (ARM) Science Team Meeting With the complement of active and passive remote sensors at the four sites, the ARM program has generated (and continues to...

248

ARM - Publications: Science Team Meeting Documents  

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of Global Climate Models Using ARM Data Stephens, G.L., Gabriel, P., and Wood, N.B., Colorado State University Twelfth Atmospheric Radiation Measurement (ARM)...

249

ARM - Publications: Science Team Meeting Documents  

NLE Websites -- All DOE Office Websites (Extended Search)

Whole-Sky Imager Data Retrieval Whole-Sky Imager Data Retrieval Tooman, T.P., Christensen, G.J., Sandia National Laboratories; Shields, J., and Karr, M., Marine Physical Laboratory, Scripps Institution of Oceanography, University of California San Diego; Moore, S., and Sowle, D., Mission Research Corporation Ninth Atmospheric Radiation Measurement (ARM) Science Team Meeting The Whole-Sky Imager (WSI) is an automated imager used for assessing and documenting cloud fields and cloud field dynamics. Four WSI instruments have been deployed on hard surfaces: one in the Southern Great Plains, two in the Tropical Western Pacific, and one in the North Slope of Alaska. Additionally another instrument has been deployed on an ice breaker in the Polar Ice Cap - Surface Heat Budget of the Arctic (SHEBA). These electronic

250

ARM - Publications: Science Team Meeting Documents  

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Diurnal Cycle of Convection, Clouds, and Water Vapor in the Tropical Diurnal Cycle of Convection, Clouds, and Water Vapor in the Tropical Upper Troposphere Soden, B.J., NOAA/GFDL Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting The presence of large diurnal variations in convection over the tropics is well documented. The amplitude of the diurnal cycle is typically largest over land areas, but important variations are also observed over oceans. Precipitation, for example, generally peaks in the early evening over tropical land regions and in the early morning over oceans. Such land/ ocean phase differences have been the topic of considerable research and debate. Many of the most widely studied diurnal variations, such as precipitation, cloud cover, and outgoing longwave radiation, are directly associated with the atmospheric hydrologic cycle. Given its obvious role in

251

ARM - Publications: Science Team Meeting Documents  

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The March 2000 Cloud Intensive Observing Period; The Evolution of the The March 2000 Cloud Intensive Observing Period; The Evolution of the Synoptic-Scale Atmosphere and the Associated Cloud Radiative Forcing Mace, G.G.(a), Sonntag, K.L.(b), Kato, S.(c), Poellot, M.(d), Twohy, C.(e), Troth, S.(a), Zhang, Q.(a), and Minnis, P.(c), University of Utah (a), Unviersity of Oklahoma (b), NASA Langley Research Center (c), University of North Dakota (d), Oregon State University (e) During the first 3 weeks of March 2000, an intensive observing period (IOP) was held near the central facility of the Southern Great Plains ARM site. In conjunction with the ARESE II campaign, the objective of this IOP was to observe the 3-dimensional structure of the cloud field using multiple scanning and vertically pointing millimeter radars. In anticipation of

252

ARM - Publications: Science Team Meeting Documents  

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Radiosonde Intercomparison During the Fall 2000 Water Vapor IOP Radiosonde Intercomparison During the Fall 2000 Water Vapor IOP Lesht, B.M. (a) and Richardson, S.J. (b), Argonne National Laboratory (a), University of Oklahoma (b) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting We conducted 160 dual-radiosonde soundings during the fall 2000 Water Vapor Intensive Operations Period (WVIOP). The soundings were done every three hours at the SGP/CART site central facility from 1430 on 18 September 2000 through 1130 on 8 October 2000. The dual soundings included Vaisala RH-80H radiosondes from four different calibration lots as well as Vaisala RS-90 radiosondes. The radisondes were distributed during the experiment so as to conduct pairwise comparisons between RS-80s, RS-90s and RS-80s/RS-90s. Prior to the WVIOP we tested the calibration of these types of radiosondes

253

ARM - Publications: Science Team Meeting Documents  

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Some Results of the Comparison of the Solar Almucantar Sky Brightness Some Results of the Comparison of the Solar Almucantar Sky Brightness Observed Under the Cirri Conditions and the Calculated One Petrushin, A.G.(b), Shukurov, A.K.(a), Shukurov, K.A.(a), and Golitsyn, G.S.(a), A.M. Obukhov Institute of Atmospheric Physics, RAS (a), Institute of Experimental Meteorology, NPO "Typhoon" (b) Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting The selected measurements of the solar almucantar sky brightness were carried out at the Zvenigorod Research Facility of the A.M.Obukhov Institute of Atmospheric Physics (IAPh) RAS using the scanning photometer [1] developed in IAPh. These measurements were took place at the cloudy sky and the clear one and at various optical depth t that was controlled with

254

ARM - Publications: Science Team Meeting Documents  

NLE Websites -- All DOE Office Websites (Extended Search)

Combination of Temperature and Humidity Profiles from a Scanning 5-mm Combination of Temperature and Humidity Profiles from a Scanning 5-mm Radiometer and MWR-Scaled Radiosondes During the 1999 Winter NSA/AAO Radiometer Experiment Westwater, E.R.(a), Leuski, V.(a), and Racette, P.(b), CIRES, University of Colorado/NOAA-ETL (a), NASA/ Goddard Space Flight Center (b) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting A scanning 5-mm-wavelength radiometer was deployed during an Intensive Operating Periods (IOP) at the Atmospheric Radiation Measurement Program's Cloud and Radiation Testbed (CART) facilities. at the North Slope of Alaska/Adjacent Arctic Ocean site near Barrow, Alaska, during March of 1999. One goal was to evaluate the ability of an oxygen-band 5-mm microwave radiometer for measuring sharp temperature inversions that are typical

255

ARM - Publications: Science Team Meeting Documents  

NLE Websites -- All DOE Office Websites (Extended Search)

Particle Size Distributions Estimated During the 2001 Multi-Frequency Radar Particle Size Distributions Estimated During the 2001 Multi-Frequency Radar IOP Williams, C.R.(a) and Sekelsky, S.M.(b), University of Colorado at Boulder (a), University of Massachusetts at Amherst (b) Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting The 2001 Multi-Frequency Radar Intensive Operational Period (IOP) was designed to collect a long dataset of W-band (95 GHz), Ka-band (35 GHz), and S-band (2.8 GHz) vertical profiling observations to investigate insect scattering and precipitating particle scattering above the Southern Great Plains (SGP) Cloud and Radiation Testbed (CART) site. The 95 and 2.8 GHz vertically pointing radars were placed next to the permanently installed 35 GHz Millimeter Wave Cloud Radar (MMCR) at the SGP Central Facility from

256

ARM - ARM Science Board  

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Science Board Board Business About Become a User Recovery Act Mission FAQ History Organization Participants Facility Statistics Forms Contacts Facility Documents ARM Management...

257

ARM - Publications: Science Team Meeting Documents: ARM Radiative...  

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ARM Radiative Transfer Modeling and Remote Sensing Clough, Shepard Atmospheric and Environmental Research Shephard, Mark Atmospheric and Environmental Research, Inc. Mlawer, Eli...

258

ARM - Publications: Science Team Meeting Documents: ARM-UAV Instrument...  

NLE Websites -- All DOE Office Websites (Extended Search)

ARM-UAV Instrumentation Used On The Proteus Aircraft During The M-PACE Experiment McCoy, Robert Sandia National Laboratories Tooman, Tim Sandia National Laboratories The...

259

ARM - Publications: Science Team Meeting Documents  

NLE Websites -- All DOE Office Websites (Extended Search)

MOD06 Cloud Products and the ARM SGP Zhang, Y.(a) and Mace, G.G.(b), University of Utah (a), University of Utah (b) Thirteenth Atmospheric Radiation Measurement (ARM) Science...

260

ARM - Publications: Science Team Meeting Documents  

NLE Websites -- All DOE Office Websites (Extended Search)

A WWW-Staged Prototype ARM Database Utility Mace, G.G. and Hudach, D., University of Utah Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting Counting from when...

Note: This page contains sample records for the topic "facility documents arm" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

ARM - Publications: Science Team Meeting Documents  

NLE Websites -- All DOE Office Websites (Extended Search)

The ARM-UAV Grand Tour, SGP, NSA, TWP Tooman, T.T., Bolton, W.B.(a), and McCoy, R.F.(a), Sandia National Laboratories (a) Thirteenth Atmospheric Radiation Measurement (ARM) Science...

262

CANISTER HANDLING FACILITY DESCRIPTION DOCUMENT  

Science Conference Proceedings (OSTI)

The purpose of this facility description document (FDD) is to establish requirements and associated bases that drive the design of the Canister Handling Facility (CHF), which will allow the design effort to proceed to license application. This FDD will be revised at strategic points as the design matures. This FDD identifies the requirements and describes the facility design, as it currently exists, with emphasis on attributes of the design provided to meet the requirements. This FDD is an engineering tool for design control; accordingly, the primary audience and users are design engineers. This FDD is part of an iterative design process. It leads the design process with regard to the flowdown of upper tier requirements onto the facility. Knowledge of these requirements is essential in performing the design process. The FDD follows the design with regard to the description of the facility. The description provided in this FDD reflects the current results of the design process.

J.F. Beesley

2005-04-21T23:59:59.000Z

263

ARM - Publications: Science Team Meeting Documents: Update on the ARM  

NLE Websites -- All DOE Office Websites (Extended Search)

Update on the ARM SCM/CRM multi-year continuous forcing datasets at SGP Update on the ARM SCM/CRM multi-year continuous forcing datasets at SGP Xie, Shaocheng Lawrence Livermore National Laboratory Yio, John DOE/Lawrence Livermore National Laboratory Klein, Stephen Lawrence Livermore National Laboratory Cederwall, Richard Lawrence Livermore National Laboratory Statistical study of SCM/CRM simulations requires a long-term (preferably, multiyear) large-scale forcing data. The current approach to develop such multiyear datasets at SGP is to use the NOAA mesoscale model RUC (Rapid Update Cycle) analyses constrained with the ARM surface and TOA measurements by using a variational analysis approach. Using this method, the LLNL ARM data infrastructure team developed a 2-year continuous forcing dataset for 1999-2000 two years ago. Since then, several ARM surface and

264

ARM - Publications: Science Team Meeting Documents: Using ARM data to  

NLE Websites -- All DOE Office Websites (Extended Search)

Using ARM data to evaluate the dependence of surface downward longwave Using ARM data to evaluate the dependence of surface downward longwave radiation on near-surface temperature and water vapour path, in both ARM observations and the Met Office NWP model. Henderson, Peter Environmental Systems Science Centre Slingo, Anthony Environmental Systems Science Centre In this work, we continue our comparisons between ARM data and simulations from the UK Met Office Numerical Weather Prediction (NWP) model. The present analysis focuses on the variables that control the downwelling longwave radiation at the surface, in particular the column water vapour and near-surface temperature. Water vapour is both a source and a sink of latent heat, is an active modulator of atmospheric radiative transfer and therefore influences both the general circulation and the global energy

265

ARM - ARM Climate Research Facility Contributions to International Polar  

NLE Websites -- All DOE Office Websites (Extended Search)

Research Support International Polar Year Begins at ACRF with 3-week Campaign in Barrow Aerosol Affects on Clouds To Be Studied Yearlong Study to Improve Polar Measurements of Radiative Energy Education Efforts Educational Kiosk CD Available at No Cost-Request Yours Today! POLAR-PALOOZA: Climate science goes on tour! Partnership Extends Support for National Science Teacher Conference Teacher's Domain Combines Culture and Climate Other Links ACRF IPY Home U.S. IPY Home ARM Climate Research Facility Contributions to International Polar Year (IPY) The Department of Energy's International Polar Year (IPY) contributions will be conducted at the Atmospheric Radiation Measurement Climate Research Facility (ARM) located in the North Slope of Alaska. This DOE user facility

266

ARM - Publications: Science Team Meeting Documents  

NLE Websites -- All DOE Office Websites (Extended Search)

Turbulence Properties Derived from MMCR Doppler Moments Mace, G. G., University of Utah Ninth Atmospheric Radiation Measurement (ARM) Science Team Meeting We are developing an...

267

ARM - Publications: Science Team Meeting Documents  

NLE Websites -- All DOE Office Websites (Extended Search)

Factors Vernon, E.N. and Mace, G.G., Department of Meteorology, Unviversity of Utah Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting The extensive...

268

ARM - Publications: Science Team Meeting Documents  

NLE Websites -- All DOE Office Websites (Extended Search)

Millimeter Radar and Microwave Radiometer Data Dong, X. and Mace, G.G., University of Utah Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting A new algorithm...

269

ARM - Publications: Science Team Meeting Documents  

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Cloud Mask Products (MOD35) with MMCR Data Zhang, Q. and Mace, G.G., University of Utah Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting The...

270

ARM - Publications: Science Team Meeting Documents  

NLE Websites -- All DOE Office Websites (Extended Search)

of Cases Sampled During the 2000 Cloud IOP Sonntag, K. and Mace, G.G., University of Utah Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting Quantities...

271

ARM - Publications: Science Team Meeting Documents  

NLE Websites -- All DOE Office Websites (Extended Search)

of Cirrus Cloud Property Retrieval Algorithms Mace, G.G. and Zhang, Y., University of Utah Fourteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting The problem of...

272

ARM - Publications: Science Team Meeting Documents  

NLE Websites -- All DOE Office Websites (Extended Search)

Ackerman, T.P.(a), and Clothiaux, E.E.(b), Pacific Northwest National Laboratory (a), The Pennsylvania State University (b) Twelfth Atmospheric Radiation Measurement (ARM) Science...

273

ARM - Publications: Science Team Meeting Documents  

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Radiation Measurement (ARM) Science Team Meeting The Desert Research Institute (DRI) instantaneous cloud condensation nuclei (CCN) spectrometer and a 3010 TSI CN counter...

274

ARM - Publications: Science Team Meeting Documents  

NLE Websites -- All DOE Office Websites (Extended Search)

overlap in order to improve the general circulation models used to produce climate forecasts. The long term meteorological data gathered by the DOE ARM program offers a unique...

275

ARM - Publications: Science Team Meeting Documents  

NLE Websites -- All DOE Office Websites (Extended Search)

Model for Vector (Polarized) Radiative Transfer Min, Q. and Duan, M., State University of New York at Albany Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting...

276

ARM - Publications: Science Team Meeting Documents  

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Min, Q., and Michalsky, J. J., Atmospheric Sciences Research Inst., State University of New York at Albany Ninth Atmospheric Radiation Measurement (ARM) Science Team Meeting We...

277

ARM - Publications: Science Team Meeting Documents  

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designed to facilitate intercomparison of ARM data with the satellite data and include thermodynamic profiles, millmeter radar data, microwave radiometer data, surface...

278

ARM - Publications: Science Team Meeting Documents  

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Optical Remote Sensing Research at Montana State University Shaw, J.A., Repasky, K., and Carlsten, J.A., Montana State University Thirteenth Atmospheric Radiation Measurement (ARM)...

279

ARM - Publications: Science Team Meeting Documents  

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Cloud Optical Depth Retrievals DeSlover, D.H. and Knuteson, R.O., University of Wisconsin - Madison Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting Data...

280

ARM - Publications: Science Team Meeting Documents  

NLE Websites -- All DOE Office Websites (Extended Search)

Radiation Measurement (ARM) Science Team Meeting Satellite measurements using passive sensors are more accurate in measuring cloud tops than cloud bases especially in...

Note: This page contains sample records for the topic "facility documents arm" from the National Library of EnergyBeta (NLEBeta).
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281

ARM - Publications: Science Team Meeting Documents  

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Measurement (ARM) Science Team Meeting Measurements by airborne cloud radar and passive instruments such as the CSU Scanning Spectral Polarimeter (SSP) during the recent...

282

ARM - Publications: Science Team Meeting Documents  

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Subgrid-Scale Vertical Transport of Moisture and Energy Over the ARM SGP: Analysis of Measurements and Parameterizations in Cumulus Convection Schemes Zhang, M.H., State University...

283

ARM - Publications: Science Team Meeting Documents  

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New Parameterization of Droplet Nucleation Penner, J.E. and Chen, Y., University of Michigan Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting Several...

284

ARM - Publications: Science Team Meeting Documents  

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NASAGoddard Space Flight Center Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting This is a status report for the "International Intercomparison of...

285

ARM - Publications: Science Team Meeting Documents  

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M.J., Brookhaven National Laboratory Ninth Atmospheric Radiation Measurement (ARM) Science Team Meeting The Brookhaven National Laboratory has developed a shipboard radiation...

286

ARM - Publications: Science Team Meeting Documents  

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Northwest National Laboratory (e) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting Aerosol influences on shortwave radiation are substantial locally and...

287

ARM - Publications: Science Team Meeting Documents  

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Radiation Measurement (ARM) Science Team Meeting A retrieval method of photon pathlength distribution using Rotating Shadowband Spectroradiometer (RSS) measurements in the oxygen...

288

ARM - Publications: Science Team Meeting Documents  

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Satellite Determination of Large-Scale Ice Water Path Distribution During ARM IOPs Liu, G. and Zuiderweg, A., Florida State University Large-scale horizontal distribution and...

289

ARM - Publications: Science Team Meeting Documents: Investigation...  

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Investigation of high ice supersaturation in cirrus clouds using ARM data and an explicit cloud model Comstock, Jennifer Pacific Northwest National Laboratory Lin, Ruei-Fong NASA...

290

ARM - Publications: Science Team Meeting Documents  

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(ARM) Science Team Meeting Anthony Davis and Alexander Marshak have spearheaded a book proposal to Springer-Verlag on 3D radiative transfer in cloud layers and cloudy...

291

ARM - Publications: Science Team Meeting Documents  

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focus of this study is to estimate the confidence intervals of the Atmospheric Radiation Measurement (ARM) Enhanced Shortwave Experiment (ARESE) solar radiation measurements on...

292

ARM - Publications: Science Team Meeting Documents  

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traceable to an international standard is the first step in establishing research quality solar irradiance measurement capabilities. All radiometers used in the ARM Program for...

293

ARM - Publications: Science Team Meeting Documents  

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Y., Hampton University; Morcrette, J.-J., European Centre for Medium-Range Weather Forecasting Ninth Atmospheric Radiation Measurement (ARM) Science Team Meeting Data over the...

294

ARM - Publications: Science Team Meeting Documents  

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Measurement (ARM) Science Team Meeting Black carbon (BC), the predominant source of solar absorption in atmospheric aerosol, can be present therein as pure BC particles distinct...

295

ARM - Publications: Science Team Meeting Documents  

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Calculation of Forcing by Carbonaceous Aerosols Penner, J.E., Zhang, S., and Chuang, C., University of Michigan Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting...

296

ARM - Publications: Science Team Meeting Documents: Spectral...  

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over the ARM SGP area from multi-year satellite observations Trishchenko, Alexander Canada Centre for Remote Sensing Luo, Yi Canada Centre for Remote Sensing Li, Zhanqing...

297

ARM - Publications: Science Team Meeting Documents: Autonomous...  

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Autonomous Retrieval of Cloud and Aerosol Properties from ARM Micropulse Lidar Flynn, Connor Pacific Northwest National Laboratory Christy, Jason Columbia University Beus, Sherman...

298

ARM - Publications: Science Team Meeting Documents  

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ARM Micropulse Lidar: Configuration Upgrades and New Data Products Flynn, C.J., Mendoza, A., and Christy, J., Pacific Northwest National Laboratory Fourteenth Atmospheric Radiation...

299

ARM - Publications: Science Team Meeting Documents  

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in Stratus Clouds Evidence of High Ice Supersaturation in Cirrus Clouds Using ARM Raman Lidar Measurements* Local Correlations and Multifractal Behavior in Marine Boundary Layer...

300

ARM - Publications: Science Team Meeting Documents  

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Systems Laboratory is operating a network of GPS receivers located at each of their wind profiler sites. The University of Oklahoma, in cooperation with the ARM program,...

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301

ARM - Publications: Science Team Meeting Documents  

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Comparisons of a Cloud Resolving Model and ARM Data Comparisons of a Cloud Resolving Model and ARM Data Posselt, D., Mecikalski, J., Tanamachi, R., Feltz, W.F., Turner, D.D., Tobin, D., Knuteson, R.O., and Revercomb, H.E., University of Wisconsin - Madison Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting CIMSS/SSEC at the University of Wisconsin is currently running version 3.5 of the PSU/NCAR MM5 once per day at a resolution of 4 km over the ARM CART site domain. Simulations are performed using a sophisticated cloud-resolving microphysics scheme (Reisner 1998) and a radiative parameterization based on RRTM (Mlawer 1997). With selection of appropriate case studies, comparisons of the model output to ARM data can be used to evaluate the model's ability to reproduce boundary-layer thermal and

302

ARM - Publications: Science Team Meeting Documents  

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Improved Retrieval Of Cloud Liquid Water Path For ARM Microwave Improved Retrieval Of Cloud Liquid Water Path For ARM Microwave Radiometers Liljegren, J.C., Ames Laboratory Eighth Atmospheric Radiation Measurement (ARM) Science Team Meeting The Atmospheric Radiation Measurement (ARM) Program has deployed dual-frequency microwave water radiometers (MWRs) at its Cloud and Radiation Testbed (CART) sites in the U. S. Southern Great Plains (SGP), the Tropical Western Pacific (TWP), and the North Slope of Alaska/Adjacent Arctic Ocean (NSA/AAO). Although the integrated water vapor amount provided by these instruments has enjoyed increasing application, the primary purpose of these instruments has been to provide measurements of the integrated liquid water path in clouds. The liquid water path measurements have been widely used by ARM investigators to test cloud life cycle

303

ARM - Publications: Science Team Meeting Documents  

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Cloud and Radiative Properties Derived Over the ARM NSA Domain From AVHRR Cloud and Radiative Properties Derived Over the ARM NSA Domain From AVHRR Data Heck, P.W., Nguyen, L., Smith, W. L., Jr., Ayers, J.K., Doelling, D.R., and Spangenberg, D.A., Analytical Services and Materials, Inc.; Minnis, P., and Young, D.F., National Aeronautics and Space Administration-Langley Research Center Ninth Atmospheric Radiation Measurement (ARM) Science Team Meeting The Atmospheric Radiation Measurement (ARM) Program's polar sites on the North Slope of Alaska (NSA) measure time series of various atmospheric, cloud and radiative properties over a few selected areas. Satellite data are needed to provide measurements of similar properties between the sites and to estimate the radiation budget at the top of the atmosphere. Over the other ARM sites in the central United States and the Pacific, geostationary

304

ARM - Publications: Science Team Meeting Documents  

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Evaluation of Terra Aerosol and Water Vapor Measurements Using ARM SGP Data Evaluation of Terra Aerosol and Water Vapor Measurements Using ARM SGP Data Ferrare, R.A.(a), Brasseur, L.H.(b), Clayton, M.B.(b), Turner, D.D.(c), Remer, L.(d), and Gao, B.C.(e), NASA Langley (a), SAIC (b), Pacific Northwest National Laboratory (c), NASA Goddard (d), Naval Research Laboratory (e) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting Measurements from the Department of Energy Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP) site are used to evaluate atmospheric measurements derived from NASA's Moderate-Resolution Imaging Spectroradiometer (MODIS) and Multiangle Imaging Spectroradiometer (MISR) sensors on board the Terra satellite. MODIS and MISR AOT retrievals are evaluated using ARM SGP Cimel Sun photometer and MultiFilter Rotating

305

ARM - Publications: Science Team Meeting Documents  

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Evaluation of Simulated Clouds in the Community Atmospheric Model (CAM2): Evaluation of Simulated Clouds in the Community Atmospheric Model (CAM2): Over the Globe and at the ARM Site Zhang, M.H.(a) and Lin, W.Y.(a), Stony Brook University Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting We first compare seasonal climatology of the global distribution of ISCCP-type clouds in the NCAR CAM2 with observations from ISCCP. Model deficiencies in simulated clouds are highlighted. Model capability of simulating the observed response of different cloud types to ENSO is also discussed. We then use ARM cloud measurements at the ARM SGP to compare with the CAM cloud statistics at the same site. It is shown that several model deficiencies in the global cloud distribution are also present at the ARM site. Relevance of these model deficiencies to the interpretation of

306

ARM - Publications: Science Team Meeting Documents  

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Characterizing and Filling Temporal and Spatial Gaps in Time-Aggregated ARM Characterizing and Filling Temporal and Spatial Gaps in Time-Aggregated ARM Measurements for Use in Carbon Models Hargrove, W.W.(a), Brandt, C.C.(a), Jager, H.I.(a), Hanan, N.(b), and McCord, R.A.(a), Oak Ridge National Laboratory (ORNL)(a), Natural Resource Ecology Laboratory (NREL)(b) Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting Data gaps limit the use of ARM data as input for simulation models. Because the ARM program records actual measurements, circumstances unavoidably arise when instrument and storage failures create gaps in the temporal stream of measurements. Most temporal gaps are short in duration and affect only one or a few related parameters. However, some rare failures, such as wide-area power outages or ice storms, occasionally affect many measurement

307

ARM - Publications: Science Team Meeting Documents  

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Three-Dimensional Radiative Transfer Computations to Complement the ARM Three-Dimensional Radiative Transfer Computations to Complement the ARM Broadband Heating Rate Profile (BBHRP) Value Added Product (VAP) OHirok, W.(a), Gautier, C.(a), and Miller, M.A.(b), University of California, Santa Barbara (a), Brookhaven National Laboratory (b) Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting A core programmatic goal of ARM is to understand how cloud variability is associated with radiative flux variability. A major effort among the ARM working groups is now underway to produce the Broadband Heating Rate Profile (BBHRP) Value Added Product (VAP). The heating rate profiles are derived from Rapid Radiative Transfer Models (RRTMs) that use best estimates of cloud characteristics, gaseous profiles, aerosols and surface

308

ARM - Publications: Science Team Meeting Documents  

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Physical Retrieval of PWV and CLW with MonoRTM Using ARM MWR Data Physical Retrieval of PWV and CLW with MonoRTM Using ARM MWR Data Clough, S.A.(a), Cady-Pereira, K.(a), Boukabara, S.(a), and Liljegren, J.C.(b), Atmospheric and Environmental Research, Inc. (a), Argonne National Laboratory (b) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting The newly developed radiative transfer model, MonoRTM, has been utilized as the forward model in a physical retrieval method to obtain Precipitable Water Vapor (PWV) and Cloud Liquid Water (CLW) using ARM MWR data. The dependence of the forward model on water vapor and oxygen has been carefully analyzed in the context of the ARM dataset covering a three-year period from 1996 to 1998. A detailed error analysis for the forward model brightness temperatures at 23.8 GHz and 31.4 GHz has been has been

309

ARM - NSA Atqasuk Facility-Inactive  

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Atqasuk Facility-Inactive Atqasuk Facility-Inactive NSA Related Links Facilities and Instruments Barrow Atqasuk ES&H Guidance Statement Operations Science Field Campaigns Visiting the Site Images Information for Guest Scientists Contacts NSA Atqasuk Facility-Inactive Location: 70° 28' 19.11" N, 157° 24' 28.99" W Altitude: 20 meters The Atqasuk facility, which was part of the larger ARM Climate Research Facility (ARM) North Slope of Alaska site, was installed the summer of 1999 off of a road near the Atqasuk Airport and operated through 2010. Located approximately 70 miles south of Barrow, Atqasuk is adjacent to the Meade River. Its climate is much more continental than that of Barrow. Atqasuk (population 225) has an economy that is largely based on subsistence fishing and caribou hunting. The Atqasuk community

310

ARM - Publications: Science Team Meeting Documents: ARM Site Atmospheric  

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ARM Site Atmospheric State Best Estimates for AIRS Forward Model and ARM Site Atmospheric State Best Estimates for AIRS Forward Model and Retrieval Validation Tobin, David University of Wisconsin-Madison Revercomb, Henry University Of Wisconsin-Madison Knuteson, Robert University Of Wisconsin Feltz, Wayne University of Wisconsin Moy, Leslie University of Wisconsin-Madison Lesht, Barry Argonne National Laboratory Cress, Ted Pacific Northwest National Laboratory Strow, Larrabee Hannon, Scott Fetzer, Eric Jet Propulsion Laboratory The Atmospheric Infrared Sounder (AIRS) on the EOS Aqua platform is the first of a new generation of advanced hyperspectral atmospheric sounders with the capability of retrieving temperature and trace gas profiles with high vertical resolution and absolute accuracy. In the past few years ARM has played a major role in the validation of AIRS, including the launch of

311

ARM - Publications: Science Team Meeting Documents  

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The Use of the ARM WSI to Estimate the Atmospheric Optical Depth at Night The Use of the ARM WSI to Estimate the Atmospheric Optical Depth at Night Musat, I.C. and Ellingson, R.G., University of Maryland Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting The shortwave extinction by atmospheric constituents can be studied during the night, with the light of stars as a radiation source, using the ARM Whole Sky Imager (WSI). The digital images obtained with the WSI are processed to infer the star radiance at the TOA and the broadband atmospheric extinction coefficient. Subsequently, the broadband extinction is calculated from an atmosphere model, and the goodness of fit of the model with observations is assessed taking into account the known profiles of temperature, pressure, columnar mixing ratios of the gases, diverse

312

ARM - Publications: Science Team Meeting Documents  

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Sub-Grid-Scale Isentropic Transports on McRAS Evaluations Sub-Grid-Scale Isentropic Transports on McRAS Evaluations Using ARM-CART SCM Datasets Sud, Y.C., Walker, G.K., and Tao, W.-K., Climate and Radiation Branch, Laboratory for Atmospheres, NASA/Goddard Space Flight Center Fourteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting Influence of Sub-grid-Scale Isentropic Transports on McRAS: Evaluation using ARM-CART SCM Datasets. Y. C. Sud, G. K. Walker and W.-K. Tao In GCM-physics evaluations with the currently available ARM-CART SCM datasets, McRAS produced very similar character of near surface errors of simulated temperature and humidity containing typically warm and moist biases near the surface and cold and dry biases aloft. We argued it must have a common cause presumably rooted in the model physics. Lack of vertical adjustment

313

ARM - Publications: Science Team Meeting Documents  

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ARM Radiosonde Humidity Measurements and Proposed Corrections ARM Radiosonde Humidity Measurements and Proposed Corrections Based On AWEX Radiosonde Intercomparisons Miloshevich, L.M.(a), Lesht, B.M.(b), and Voemel, H.(c), National Center for Atmospheric Research (a), Argonne National Laboratory (b), NOAA/CMDL (c) Fourteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting ARM radiosonde relative humidity (RH) measurements are widely used in numerical modeling, remote sensor validation, and radiative transfer calculations, yet their accuracy as a function of temperature and RH has not been adequately quantified. During the AIRS Water vapor EXperiment (AWEX) at the SGP site in November 2003, 34 launches of multiple radiosondes on the same balloon were conducted, including 12 soundings from the University of Colorado's Cryogenic Frostpoint Hygrometer (CFH). The

314

ARM - Publications: Science Team Meeting Documents  

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Effects of Land-Surface Physics on the Cloud-Resolving Simulations During the ARM Summer 1997 IOP Wang, D.H. (a,b) and Xu, K.M.(b), Hampton University (a), NASA Langley Research...

315

ARM - Publications: Science Team Meeting Documents  

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Cloud Layer Thickness and Temperature Vernon, E.N.(a) and Mace, G.G.(b), University of Utah (a), University of Utah (b) Twelfth Atmospheric Radiation Measurement (ARM) Science...

316

ARM - Publications: Science Team Meeting Documents  

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8 Science Team Meeting 8 Science Team Meeting 1998 Proceedings Proceedings Sorted by Title Proceedings Sorted by Author Science Team Meeting Proceedings Cover image Proceedings of the Eighth Atmospheric Radiation Measurement (ARM) Science Team Meeting ARM-CONF-1998, March 1998 Tucson, Arizona For proper viewing, many of these proceedings should be viewed with Adobe Acrobat Reader. Download the latest version from the Adobe Reader website. View session papers by Author or Title. * Poster abstract only; an extended abstract was not provided by the author(s). History and Status of the ARM Program - March 1998 Session Papers A Cloud Climatology of the ARM CART Site S.M. Lazarus, S.K. Krueger, and G.G. Mace A Combination of the Separation of Variable and the T-Matrix Method for Computing Optical Properties of Spheroidal Particles*

317

ARM - Publications: Science Team Meeting Documents  

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Using ARM Measurements to Evaluate and Improve the Turbulent Boundary-Layer Using ARM Measurements to Evaluate and Improve the Turbulent Boundary-Layer Parameterization in the CCM Zhang, M.H. (a) and Yu, R.C. (a), State University of New York(a) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting Three-Dimensional advective tendencies at the Atmospheric Radiation Measurement (ARM) Program Southern Great Plains (SGP) site, together with diurnal variation of the clear-sky boundary layer atmosphere temperature and moisture, are used to study the down-gradient and "non-local" turbulent transport of heat and moisture in the atmospheric boundary layer. The observational results are then used to evaluate the boundary layer parameterization in the National Center for Atmospheric Research (NCAR) CCM3. It is found that the down-gradient turbulent transport in the CCM3 is

318

ARM - Publications: Science Team Meeting Documents  

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Fair - Weather Cumuli Climatology at the TWP ARM Site Fair - Weather Cumuli Climatology at the TWP ARM Site Kollias, P. and Albrecht B.A., University of Miami Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting Fair-weather cumuli are fundamental in regulating the vertical structure of water vapor and entropy in the lowest 2 km of the Earths atmosphere over vast areas of the oceans. Over two years of data from the mm-wavelength cloud radar, at the Nauru (TWP-ARM) site, are analyzed and a statistical description of the field of fair weather cumulus is inferred. Frequency diagrams of cloud thickness, fractional coverage, updraft-downdraft magnitudes and cloud reflectivity are calculated for four different classes of fair weather cumuli. Seasonal patterns are identified and their relationship to the thermodynamic structure of the boundary layer (wet-dry

319

ARM - Publications: Science Team Meeting Documents  

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Diurnal Cycle of Cloud Microphysical Properties from GOES Over the ARM Diurnal Cycle of Cloud Microphysical Properties from GOES Over the ARM Southern Great Plains Minnis, P., and Young, D.F., National Aeronautics and Space Administration-Langley Research Center; Smith, W.L., Jr., and Heck, P.W., Analytical Services and Materials, Inc. Ninth Atmospheric Radiation Measurement (ARM) Science Team Meeting Cloud coverage, height and optical depth have been derived from the Geostationary Operational Environmental Satellite (GOES) data taken over the Atmospheric Radiation Measurement (ARM) Program's Southern Great Plains (SGP) domain since 1994. While these parameters provide a valuable basis for understanding the interaction of clouds with the radiation budget, they do not provide a complete characterization of the cloud field. Phase

320

ARM - Publications: Science Team Meeting Documents  

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Comparison of MM5 Forecast Shortwave Radiation with ARM SGP Data Comparison of MM5 Forecast Shortwave Radiation with ARM SGP Data Armstrong, M.A. and Ellingson, R.G., University of Maryland Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting The performance of the Pennsylvania State University-National Center for Atmospheric Research Mesoscale Model 5 (MM5), in particular the shortwave downwelling (SW) flux calculations, is examined in this paper. Selected quantities output from the MM5 were compared with ARM SGP data gathered during the SCM intensive observation period (IOP) from June 18 to July 18, 1997. MM5 was run 29 times with a forecast length of 24 hours. The data were saved and then compared to radiosonde and pyranometer data. SW flux calculated from the MM5 deviated severely from that observed at the SGP

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321

ARM - Publications: Science Team Meeting Documents  

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Comparison of ARM Cloud Property Observations with CRM Simulations Comparison of ARM Cloud Property Observations with CRM Simulations Xu, K.-M. (a), Cederwall, R.T. (b), Xie, S.C. (b), and Yio, J.J. (b), NASA Langley Research Center (a), Lawrence Livermore National Laboratory (b) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting The cloud property observations are compared with cloud-resolving model simulated cloud properties in this study, using the Summer 1997 Intensive Observation Period (IOP) data of the ARM program. Midlatitude continental cumulus convection are simulated by seven 2-D and two 3-D cloud resolving models (CRMs), driven by observed large-scale advective temperature and moisture tendencies, surface turbulence fluxes, and radiative heating profiles during three subperiods of the Summer 1997 IOP. Each subperiod

322

ARM - Publications: Science Team Meeting Documents  

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Initial Measurements from the Compact Millimeter-Wave Radar Initial Measurements from the Compact Millimeter-Wave Radar Roman-Nieves, J.(a), Sekelsky, S.M.(a), Tooman, T.T.(b), and Bolton, W.B.(b), University of Massachusetts at Amherst (a), Sandia National Laboratories (b) Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting The University of Massachusetts at Amherst has developed a solid state compact 95 GHz millimeter-wave radar (CMR) for the ARM Unmanned Aerospace Vehicle (UAV) program. CMR has recently flown in ARM-UAV sponsored engineering flights and a cirrus science mission flying aboard the NASA Proteus aircraft. This poster presents the final CMR hardware configuration and results from ground-based and airborne engineering measurements. In addition we show airborne measurements form from the ARM-UAV 2002 Cirrus

323

ARM - Publications: Science Team Meeting Documents  

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Aerosol Indirect Effect: Evidence from the ARM SGP and NSA Sites Aerosol Indirect Effect: Evidence from the ARM SGP and NSA Sites Penner, J.E.(a), Chen, Y.(a), and Dong, X.(b), University of Michigan (a), University of North Dakota (b) Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting The ARM SGP site and the NSA site provide a unique opportunity to examine the effects of aerosols on cloud optical properties because the aerosol concnetrations at each site span the range between polluted and clean conditions. Here, we examine whether the effect of aerosols on clouds can adequately explain the observed relationship between the liquid water path observed at each site and the cloud optical depth required to determine the observed surface flux. Aerosol number concentration at the SGP site was determined from the observed CN number concentration as well as the

324

ARM - Publications: Science Team Meeting Documents  

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An Overview of ARM Satellite Cloud and Radiation Budget Datasets An Overview of ARM Satellite Cloud and Radiation Budget Datasets Minnis, P.(a), Nguyen, L.(a), Smith Jr., W.L.(a), Doelling, D.R.(b), Heck, P.W.(c), Khaiyer, M.M.(b), Palikonda, R.(b), Young, D.F.(a), Spangenberg, D.A.(b), Chakrapani, V.(b), Walter, B.J.(b), and Nowicki, G.D.(b), NASA Langley Research Center (a), Analytical Services and Materials, Inc. (b), CIMSS/University of Wisconsin-Madison (c) Fourteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting The derivation of cloud properties from satellite data has been greatly enhanced by the availability of new multispectral satellite imagers, the validation power of ARM instruments and IOPs, and increases in computer processing speeds. Likewise, the recent availability of broadband radiation

325

ARM - Publications: Science Team Meeting Documents  

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Cloud Height Statistics Derived from ARM Millimeter Cloud Radar Cloud Height Statistics Derived from ARM Millimeter Cloud Radar Kato, S. (a), Clothiaux, E.E. (b), and Xu, K.-M. (c), Hampton University (a), Pennsylvania State University (b), NASA Langley Research Center(c) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting The probability of occurrence of the cloud top height for a given altitude and relation to the geometrical cloud thickness are derived from radar reflectivity factor taken by a millimeter cloud radar operated at ARM Oklahoma site. Statistics derived using July 1997 data show that the cloud top is likely to occur at 12 km and clouds extend to the lower troposphere. Statistics derived using January 1998 data show that single layer boundary layer clouds are dominant. There is another cloud top peak, although less

326

ARM - Publications: Science Team Meeting Documents  

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ARM External Data: Recent Developments and Future Plans ARM External Data: Recent Developments and Future Plans Wagener, R., Gregory, L., Ma, L.L., and Cialella, A., Brookhaven National Laboratory Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting This poster lists new datastreams collected and processed by the ARM External Data Center since the last update in 1999 (MOLTS, TOMS, 30 min OK Mesonet, CSPHOT, TWP AVHRR, ECMWF, RUC, TAO Buoy, IAP). We describe briefly the software tools employed in converting these data to netCDF files, because data-users might find them helpful in dealing with the raw files themselves (GrADS, IDL, Perl). The priorities for future data acquisitions and ingests are set by consensus of the Science Working Groups. The current high priority new collections include: Suominet GPS data, Darwin Radar and

327

ARM - Publications: Science Team Meeting Documents  

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Direct Aerosol Forcing Calculated at the ARM Southern Great Plains Site Direct Aerosol Forcing Calculated at the ARM Southern Great Plains Site Ackerman, T.P., Flynn, D.M., and Long, C.N., Pacific Northwest National Laboratory Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting The continuous measurements of direct and diffuse solar radiation, water vapor column amount, and aerosol optical depth provided at the ARM SGP site permit us to calculate directly the actual magnitude of the direct aerosol forcing. Our methodology employs the clear sky detection algorithm of Long and Ackerman (2000) to identify cloudless periods. We then fit the downward solar flux at the surface during these periods with an empirical function, which provides us with a continuous mathematical representation of the surface flux under aerosol conditions. The flux under completely clear

328

ARM - Publications: Science Team Meeting Documents  

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ARM In The Classroom: Developing an Operational Forecasting Site for the ARM In The Classroom: Developing an Operational Forecasting Site for the NSA Harrington, J. Y.(a) and Olsson, P. Q.(b), The Pennsylvania State University (a), The University of Alaska Anchorage (b) Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting During the fall 2002 semester, the Department of Meteorology's Computer Applications in Meteorology course took on the project of developing an operational forecasting site for the ARM North Slope of Alaska and the Alaska Region. The course was designed around team-driven forecast products similar to what the students will find in the job environment. During the fall semester, the students were provided with a data feed from Alaska consisting of various forecast fields for the ETA model Alaska grid. The

329

ARM - Publications: Science Team Meeting Documents  

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Using GFS Weather Model to Reduce Diurnal Differences Between GPS PW and ARM MWR PW Van Hove, T.(a), Liljegren, J.C.(b), Rocken, C.(a), and Braun, J.(a), University Corporation for...

330

ARM - Publications: Science Team Meeting Documents  

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since April 2002. This poster will present a view of the 20022003 Australian summer monsoon through the use of data collected by both the ARM and existing Bureau of Meteorology...

331

ARM - Publications: Science Team Meeting Documents  

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R.H.(a), and Papakyriakou, T.N.(b), University of Miami, RSMAS (a), University of Manitoba, CEOS (b) Fourteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting As...

332

ARM - Publications: Science Team Meeting Documents  

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Instrumentation for the AMR-UAV Payload McCoy, R.F., Tooman, T.T., and Bolton, W.B., Sandia National Laboratories Thirteenth Atmospheric Radiation Measurement (ARM) Science Team...

333

ARM - Publications: Science Team Meeting Documents  

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and ARM Enhanced Shortwave Experiment Aircraft Data J.K. Ayers, D.R. Doelling, L. Nguyen, W.L. Smith, Jr., and P. Minnis Cloud Optical Properties Obtained from the...

334

ARM - Publications: Science Team Meeting Documents  

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M.W. An Overview of ARM Satellite Cloud and Radiation Budget Datasets* Minnis, P., Nguyen, L., Smith Jr., W.L., Doelling, D.R., Heck, P.W., Khaiyer, M.M., Palikonda, R., Young,...

335

ARM - Publications: Science Team Meeting Documents  

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Retrieval of Ice Water Path, Ice Particle Size, and Shape Mitchell, D.L., Arnott, W.P., and Ivanova, D.C., Desert Research Institute Twelfth Atmospheric Radiation Measurement (ARM)...

336

ARM - Publications: Science Team Meeting Documents  

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University of Utah has been archiving (daily) column data from the NCEP Medium Range Forecast (MRF) model for various sites over the globe. Four of these sites coincide with ARM...

337

ARM - Publications: Science Team Meeting Documents: Scanning...  

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November 2002 rejoined the program to participate in the SGP leg of the ARM-UAV "Grand Tour". S-HIS spectral coverage is 580-3000 cm-1 with a resolution of 0.5 cm-1, and spatially...

338

ARM - Publications: Science Team Meeting Documents  

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The ARM Blue/Green Period: 3-Channel Color Composites of GOES-8 Data The ARM Blue/Green Period: 3-Channel Color Composites of GOES-8 Data Wagener, R., and Gregory, L., Brookhaven National Laboratory, ARM External Data Center Konidaris, N., Carnegie Mellon University; Minnett, P.J., University of Miami, Rosenstiel School of Marine and Atmospheric Sciences Ninth Atmospheric Radiation Measurement (ARM) Science Team Meeting Despite the title and the general appearance of the resulting images, this is not an attempt to emulate art nor an expression of anybody's mood. It is simply an attempt to condense as much information as possible about a day's worth of Geostationary Operational Environmental Satellite (GOES) data onto a single web page. A 24-bit red, green, blue (RGB) color composite is derived by assigning the reflectivity in the GOES-8 visible channel to red,

339

Instrumentation Overview ARM Climate Research Facility 18th Annual...  

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Overview ARM Climate Research Facility 18th Annual ARM Science Team Meeting Jimmy Voyles Voyles STM.2008 Presentation Outline Voyles STM.2008 Presentation Outline * Program Science...

340

DOE/SC-ARM-12-006 ARM Climate Research Facility Radar Operations...  

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Database CM&PM Corrective Maintenance & Preventative Maintenance Database DMF Data Management Facility (ARM) DQ data quality DQO Data Quality Office (ARM) DQPR Data Quality...

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341

ARM - Publications: Science Team Meeting Documents  

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A Satellite-Based Assessment of Upper Tropospheric Water Vapor Measurements A Satellite-Based Assessment of Upper Tropospheric Water Vapor Measurements During AFWEX Soden, B.J.(a), Ferrare, R.A.(b), Goldsmith, J.E.M.(c), Smith, W.L.(d), Tobin, D.(e), Turner, D.D.(f), and Whiteman, D.N.(g), NOAA/GFDL (a), NASA/LaRC (b), Sandia National Laboratories (c), NASA/LaRC (d), UW/SSEC (e), Pacific Northwest National Laboratory (f), NASA/GSFC (g) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting Accurate measuremetns of upper tropospheric water vapor are critical both for understanding the flow of radiation and formation of clouds, and for the detection and attribution of climate change. In fall of 2000 ARM conducted the ARM-FIRE Water Vapor Experiment (AFWEX) to evaluate the accuracy of upper tropospheric water vapor measurements. The experiment

342

ARM - Publications: Science Team Meeting Documents  

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An Assessment of Upper Tropospheric Humidity Measurements at the ARM An Assessment of Upper Tropospheric Humidity Measurements at the ARM SGP/CART Site Soden, B.J. (a), Turner, D.D. (b), and Goldsmith, J.E.M. (c), NOAA/GFDL (a), Pacific Northwest National Laboratory (b), Sandia National Laboratories (c) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting Upper tropospheric water vapor plays a key role in regulating the flow of radiation through clear skies and the formation and dissipation of clouds. Unfortunately, due to the difficulty of accurately measuring this quantity, it remains a key uncertainty in GCM predictions of climate change. Much of the uncertainty surrounding upper tropospheric water vapor reflects an incomplete understanding of the processes which regulate its distribution and variations. This, in turn, reflects the lack of suitable observations

343

ARM - Publications: Science Team Meeting Documents  

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From Crops to Boundary Layer and Back Down Again: the ARM Carbon Project in From Crops to Boundary Layer and Back Down Again: the ARM Carbon Project in the Southern Great Plains Torn, M.S.(a), Berry, J.(b), Riley, W.J.(a), Fischer, M.L.(a), Billesbach, B.(c), Helliker, B.(b), and Giles, L.(b), Lawrence Berkeley National Laboratory (a), Carnegie Institution of Washington (b), University of Nebraska (c) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting One of the challenges in carbon cycle research is the vast range of scale that must be traversed by measurements and models. Our understanding of carbon cycle processes is being built from studies of enzymes, organisms and plot-scale studies of ecosystems, while our ultimate objective is to understand the mass and isotope balance of earth’s atmosphere. Spanning

344

ARM - Publications: Science Team Meeting Documents  

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Comparison of Spectral and Broadband Measurements of Surface Flux with Comparison of Spectral and Broadband Measurements of Surface Flux with Model Calculations on Clear Days at the ARM SGP Site Arking, A. (a), Liu, F. (a), Harrison, L. C. (b), Pilewskie, P. (c), and Chou, M.-D. (d), Johns Hopkins University (a), State University of New York, Albany (b), NASA Ames Research Center (c), NASA Goddard Space Flight Center (d) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting Observations of spectral and broadband solar irradiance at the ARM/SGP site have been compared with line-by-line model calculations. The spectral measurements were made with the SUNY Albany Rotating Shadowband Spectroradiometer (RSS) and the NASA Ames Solar Spectral Flux Radiometer (SSFR). The broadband measurements were made with the Baseline Solar

345

ARM - Publications: Science Team Meeting Documents  

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Development and Comparison of Ground- and Satellite-based Retrievals of Development and Comparison of Ground- and Satellite-based Retrievals of Cirrus Cloud Physical Properties d'Entremont, R.P.(a) and Mitchell, D.L.(b), Atmospheric and Environmental Research, Inc. (a), Desert Research Institute (b) Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting This project is designed to (1) develop new ground- and space-based retrieval methods for cirrus cloud ice water path (IWP), effective size (Deff), and visible extinction optical thickness (OT) using thermal infrared wavelength bands from 3.7 to 13 um, and (2) to compare these retrievals with others obtained by ARM investigators during various ARM IOPs. During year 1 of this project research focused primarily on the enhancing of satellite- and ground-based thermal infrared retrievals of

346

ARM - Publications: Science Team Meeting Documents  

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NREL Pyrheliometer Comparisons - 2002 NREL Pyrheliometer Comparisons - 2002 Reda, I. and Stoffel, T.L., National Renewable Energy Laboratory Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting All broadband shortwave radiometers used by the ARM Program are calibrated with absolute cavity radiometers traceable to the World Radiometric Reference (WRR). The WRR was developed and is maintained by the World Radiation Center under the auspices of the World Meteorological Organization. Each fall, the National Renewable Energy Laboratory (NREL) hosts annual comparisons of absolute cavity radiometers at the Solar Radiation Research Laboratory in Golden, Colorado. Since 1995, NREL has maintained the Transfer Standard Group (TSG) consisting of five radiometers belonging to NREL and the ARM Program. Our poster summarizes the results of

347

ARM - Publications: Science Team Meeting Documents  

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CAGEX Version 3: Tightening Shortwave Fluxes and Measurements of Surface CAGEX Version 3: Tightening Shortwave Fluxes and Measurements of Surface Spectral Characteristics Alberta, T.L., Analytical Services and Materials, Inc.; Charlock, T.P., National Aeronautics and Space Administration-Langley Research Center Ninth Atmospheric Radiation Measurement (ARM) Science Team Meeting Version 3 of the CAGEX (Clouds and Earth's Radiant Energy System [CERES]/Atmospheric Radiation Measurement [ARM]/Global Energy and Water Experiment [GEWEX]) is introduced. As with Version 2 (10/95) and Version 1 (4/94), Version 3 provides input data sufficient for broadband radiative transfer calculations; fluxes computed with those inputs and the Fu-Liou code as modified by Hu, Rose and Kratz; and measurements for validation and diagnostics. Along with the usual ARM data sets (Solar and Infrared

348

ARM - Publications: Science Team Meeting Documents  

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Using ARM GOES-8 Cloud and TOA Flux Properties to Estimate Surface Using ARM GOES-8 Cloud and TOA Flux Properties to Estimate Surface Radiation Budget Parameters Stackhouse, P.W., Jr. (a), Gupta, S.K. (b), Cox, S.J. (b), Minnis, P. (a), Smith, W.L., Jr. (b), and Khaiyer, M.M. (b), NASA Langley Research Center (a) Analytical Services and Materials, Inc. (b) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting The Global Energy and Water Cycle Experiment (GEWEX) Surface Radiation Budget Project (SRB) uses top-of-atmosphere (TOA) radiance measurements and cloud property retrievals to estimate surface fluxes on a global basis. Normally, GEWEX SRB algorithms rely on TOA radiances and cloud information derived from International Satellite Cloud Climatology Project (ISCCP) data. Here, we show first results of using SW and LW algorithms featured in

349

ARM - Publications: Science Team Meeting Documents  

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Irradiance Using Remotely Sensed Cloud Properties From Irradiance Using Remotely Sensed Cloud Properties From ARM's SGP Site Barker, H.W., Atmospheric Environment Service of Canada; Li, Z., Canada Centre for Remote Sensing; Clothiaux, E.E., and Ackerman, T.P., The Pennsylvania State University; Kato, S., National Aeronautics and Space Administration-Langley Research Center Ninth Atmospheric Radiation Measurement (ARM) Science Team Meeting Time series of profiles of cloud water content and droplet effective radii have been inferred from data obtained by a 35-GHz radar and a Microwave Radiometer (MWR) at the Atmospheric Radiation Measurement (ARM) Program's Southern Great Plains (SGP) site. These profiles initialize a Monte Carlo algorithm that predicts time series of broadband surface solar irradiance, which in turn are compared with coeval measurements. Special attention is

350

ARM - Publications: Science Team Meeting Documents  

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Sizes, Fractional Coverage, and Radar Doppler Moments Profiles of Sizes, Fractional Coverage, and Radar Doppler Moments Profiles of Fair-Weather Cumulus Clouds at the TWP ARM Site Kollias, P., Albrecht B.A., and Dow B.J., University of Miami Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting Fair-weather cumuli are fundamental in regulating the vertical structure of water vapor and entropy in the lowest 2 km of the Earth's atmosphere over vast areas of the oceans. Using data from the mm-wavelength cloud radar, the micro-pulse lidar and ceilometer at the Nauru (TWP-ARM) site, a statistical description of the field of fair weather cumulus is inferred. Frequency diagrams of cloud thickness, fractional coverage, updraft-downdraft magnitudes and cloud reflectivity are calculated. The relationship of the statistical behavior of the cumulus field to the

351

ARM - Publications: Science Team Meeting Documents  

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Interactions of Cumulus Convection and the Boundary Layer Over the Southern Interactions of Cumulus Convection and the Boundary Layer Over the Southern Great Plains Krueger, S.K. (a), Luo, Y. (a), Lazarus, S.M. (a), and Xu, K.-M. (b), University of Utah (a), NASA Langley Research Center (b) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting We are using observations and cloud-resolving model (CRM) simulations to better understand the interaction between deep cumulus convection and the boundary layer over the southern Great Plains of the United States. The observations are from a 29-day ARM SCM IOP that took place at the ARM SGP site during June and July 1997. The cumulus effects in the boundary layer are due to rain evaporation and fluxes due to cumulus updrafts and downdrafts. These effects can substantially modify the boundary layer in

352

ARM - Publications: Science Team Meeting Documents  

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The Second ARM Diffuse Horizontal Irradiance Comparison Fall 2003 The Second ARM Diffuse Horizontal Irradiance Comparison Fall 2003 Michalsky, J.J.(a), Dolce, R.(b), Dutton, E.G.(c), Long, C.N.(d), Jeffries, W.Q.(e), McArthur, L.J.B.(f), Philipona, R.(g), Reda, I.(h), and Stoffel, T.L.(h), State University of New York at Albany (a), Kipp & Zonen, Inc. (b), Climate Monitoring and Diagnostics Laboratory, NOAA (c), Pacific Northwest National Laboratory (d), Yankee Environmental Systems, Inc. (e), Meteorological Service of Canada (f), World Radiation Center (g), National Renewable Energy Laboratory (h) Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting The first diffuse horizontal irradiance comparison in the Fall 2001 revealed a consistency near the 2 W/m2 level among more than half of the pyranometers that participated. In planning for this second comparison the

353

ARM - Publications: Science Team Meeting Documents  

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Boundary Layer Structure and Fair-Weather Cumulus Characteristics at the Boundary Layer Structure and Fair-Weather Cumulus Characteristics at the TWP ARM Site - Comparisons with Other Tropical and Subtropical Sites Albrecht, B. and Kollias, P., University of Miami Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting Fair-weather cumuli are fundamental in regulating the vertical structure of water vapor and entropy in the lowest 2 km of the Earths atmosphere over vast areas of the oceans. Boundary layer structures and cloud characteristics observed at Nauru (ARM TWP) during suppressed convective conditions are compared with those observed at other tropical and subtropical sites. Over three years of data from the mm-wavelength cloud radar and ceilometer observations at the Nauru site are analyzed and a statistical description of the field of fair weather cumulus is inferred.

354

ARM - Publications: Science Team Meeting Documents  

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Towards Parameterization of Frontal Mesoscale Circulations and Cloudiness Towards Parameterization of Frontal Mesoscale Circulations and Cloudiness in GCMs Based on ARM Observations Norris, J.R.(a), Weaver, C.P.(b), Gordon, N.D.(c), and Klein, S.A.(d), Scripps Institution of Oceanography (a), Rutgers University (b), Scripps Institution of Oceanography (c), GFDL/NOAA (d) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting Cloudiness associated with extratropical cyclones is currently poorly represented in GCMs due to incorrect and insufficient representation of subgrid-scale processes. Since this can lead to erroneous cloud-climate feedbacks it is necessary to develop an understanding of the relationship between mesoscale cloud variability and large-scale synoptic forcing that will result in improved parameterization. Observations from the ARM

355

ARM - Publications: Science Team Meeting Documents  

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I Method I Method Potter, G.L.(a), Boyle, J.S.(a), Cederwall, R.T.(a), Fiorino, M.(a), Hnilo, J.J.(a), Phillips, T.J.(a), and Williamson, D.(b), Lawrence Livermore National Laboratory (a), National Center for Atmospheric Research (b) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting We present a methodology to diagnose GCM errors by using NWP analyses to initialize a climate model. The analysis is used as input in conjunction with ARM data to study the initial model drift (6-36 hours) from the observations. Simply put, a climate model is used in a weather forecast mode to see how quickly it drifts from the observed weather and detailed observations provided by the ARM program. This approach can be used to improve parameterizations responsible for models errors on longer time

356

ARM - Publications: Science Team Meeting Documents  

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International Pyrgeometer and Absolute Sky-scanning Radiometer Comparison International Pyrgeometer and Absolute Sky-scanning Radiometer Comparison at the NSA ARM site Barrow Stamnes, K. (a), Dutton, E.G. (b), Marty, Ch. (c), Michalsky, J.J. (d), Philipona, R. (e), Stoffel, T. (f), Storvold, R. (c), and Zak, B.D. (g), Stevens Institute of Technology, New Jersey (a), NOAA, Climate Monitoring and Diagnostics Laboratory (b), University of Alaska Fairbanks (c), State University of New York at Albany (d), World Radiation Center, Davos, Switzerland (e), National Renewable Energy Lab, Boulder (f), Sandia National Laboratories, Albuquerque (g) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting The first International Prgeometer and Absolute Sky-scanning Radiometer Comparison (IPASRC I), which was held in fall 1999 at the ARM SGP site in

357

ARM - Publications: Science Team Meeting Documents  

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An Improved Technique for Producing MPL Backscatter Profiles Properly An Improved Technique for Producing MPL Backscatter Profiles Properly Characterized at All Ranges Flynn, C.J. and Powell, D.M., Pacific Northwest National Laboratory Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting An important part of ARM's mission is the quantitative study of the effect of clouds and aerosol on radiative transfer and the energy budget. Micropulse Lidar (MPL) are an integral component of the ARM Program's measurement strategy with one deployed at each of the four major sites (SGP, TWP1, TWP2, and NSA). The MPL system is capable of producing vertical profiles of cloud and aerosol from ground level to the top of the atmosphere. However, the legitimacy of these profiles is sensitive to the calibration and system corrections of the individual MPL. In particular,

358

ARM - Publications: Science Team Meeting Documents  

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Validation of CERES/MODIS Cloud Property Retrievals Using Ground-Based Validation of CERES/MODIS Cloud Property Retrievals Using Ground-Based Measurements Obtained at the DOE ARM SGP Site Dong, X.(a), Minnis, P.(b), Sun-Mack, S.(b), and Mace, G.G.(a), University of Utah (a), NASA Langley Research Center (b) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting Cloud macrophysical and microphysical properties derived from the NASA TERRA (EOS-AM) Moderate Resolution Spectroradiometer (MODIS) as part of the Clouds and the Earth's Radiant Energy System (CERES) project during November 2000-June 2001 are compared to simultaneous ground-based observations. The ground-based data taken by the Atmospheric Radiation Measurement (ARM) Program are used as "ground truth" data set in the validation of the CERES cloud products and to improve the CERES daytime and

359

ARM - Publications: Science Team Meeting Documents  

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Evaluation of Terra MODIS Aerosol and Water Vapor Measurements Using ARM Evaluation of Terra MODIS Aerosol and Water Vapor Measurements Using ARM SGP Data Ferrare, R.A. (a), Brasseur, L.H. (b), Turner, D.D. (c,d), Tooman, T.P. (e), Remer, L. (f), and Gao, B-C. (g), NASA Langley Research Center (a), Science Applications International Corporation/NASA/LaRC (b), Pacific Northwest National Laboratory (c), University of Wisconsin-Madison (d), Sandia National Laboratories (e), NASA Goddard Space Flight Center (f), Naval Research Laboratory (g) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting NASA's Moderate-Resolution Imaging Spectroradiometer (MODIS) sensor on the Earth Observing System (EOS) Terra satellite platform has been measuring aerosol and water vapor parameters since February 2000. The MODIS aerosol

360

ARM - Publications: Science Team Meeting Documents  

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Comparison of Boundary Layer Cloud Properties using Surface and GOES Comparison of Boundary Layer Cloud Properties using Surface and GOES Measurements at the ARM SGP Site Dong, X. (a), Minnis, P. (b), Smith, W.L., Jr. (b), and Mace, G.G. (a), University of Utah (a), NASA Langley Research Center (b) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting Boundary layer cloud microphysical and radiative properties derived from GOES data during March 2000 cloud IOP at ARM SGP site are compared with simultaneous surface-based observations. The cloud-droplet effective radius, optical depth, and top-of-atmoshpere (TOA) albedo are retrieved from a 2-stream radiative transfer model in conjunction with ground-based measurements of cloud radar, laser ceilometer, microwave and solar radiometers. The satellite results are retrieved from GOES visible and

Note: This page contains sample records for the topic "facility documents arm" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

ARM - Publications: Science Team Meeting Documents  

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Meeting Meeting 1999 Proceedings Proceedings Sorted by Title Proceedings Sorted by Author Science Team Meeting Proceedings Cover image Proceedings of the Ninth Atmospheric Radiation Measurement (ARM) Science Team Meeting ARM-CONF-1999, March 1999 San Antonio, Texas For proper viewing, many of these proceedings should be viewed with Adobe Acrobat Reader. Download the latest version from the Adobe Reader website. View session papers by Author or Title. * Poster abstract only; an extended abstract was not provided by the author(s). A B C D E F G H I J K L M N O P Q R S T U V W X Y Z A Abshire, J.B. Development of a Compact Lidar to Profile Water Vapor in the Lower Troposphere Ackerman, T.P. A 25-Month Database of Stratus Cloud Properties Generated from Ground-Based Measurements at the ARM SGP Site

362

ARM - Publications: Science Team Meeting Documents  

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Initial Cloud Properties Derived from GMS Over the Tropical Western Pacific Initial Cloud Properties Derived from GMS Over the Tropical Western Pacific Doelling, D.R., Ho, S.-P., Smith, W.L., Jr., Analytical Services and Materials, Inc.; Minnis, P., National Aeronautics and Space Administration-Langley Research Center Ninth Atmospheric Radiation Measurement (ARM) Science Team Meeting Satellite data are needed to provide measurements of the earth-atmosphere shortwave (SW) albedo, outgoing longwave radiation (OLR), and cloud and surface radiative properties for the Atmospheric Radiation Measurement (ARM) Program's Tropical Western Pacific (TWP) domain. Geostationary Meteorological Satellite (GMS) data have been archived since November 1996 and provide the basis for monitoring these essential parameters over the ARM TWP. This paper describes the initial efforts and results of developing

363

ARM - Publications: Science Team Meeting Documents  

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an Improved Convective Triggering Mechanism in the NCAR CAM2 an Improved Convective Triggering Mechanism in the NCAR CAM2 under the CCPP-ARM Parameterization Testbed (CAPT) Framework Xie, S.C.(a), Cederwall, R.T.(a), Potter, G.L.(a), Boyle, J.S.(a), Yio, J.J.(a), Zhang, M.H.(b), and Lin, W.Y.(b), Lawrence Livermore National Laboratory (a), State University of New York at Stony Brook (b) Fourteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting In this study, we implement an improved convective triggering mechanism, which was developed by Xie and Zhang [2000] based on the ARM observations and Single-Column Model (SCM) tests, in the NCAR Community Atmosphere Model (CAM2) in order to reduce the problem that the model produces excessive warm season daytime precipitation over land. This problem is closely

364

DOE Designated User Facilities Multiple Laboratories * ARM Climate Research Facility  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Designated User Facilities Designated User Facilities Multiple Laboratories * ARM Climate Research Facility Argonne National Laboratory * Advanced Photon Source (APS) * Electron Microscopy Center for Materials Research * Argonne Tandem Linac Accelerator System (ATLAS) * Center for Nanoscale Materials (CNM) * Argonne Leadership Computing Facility (ALCF) * Brookhaven National Laboratory * National Synchrotron Light Source (NSLS) * Accelerator Test Facility (ATF) * Relativistic Heavy Ion Collider (RHIC) * Center for Functional Nanomaterials (CFN) * National Synchrotron Light Source II (NSLS-II ) (under construction) Fermi National Accelerator Laboratory * Fermilab Accelerator Complex Idaho National Laboratory * Advanced Test Reactor ** * Wireless National User Facility (WNUF)

365

ARM - Publications: Science Team Meeting Documents  

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On the Detection and Analysis of Multilayered Clouds: Comparison of MODIS On the Detection and Analysis of Multilayered Clouds: Comparison of MODIS Analyses with ARM CART Site Cloud Products Baum, B.A.(a), Nasiri, S.L.(b), and Mace, G.G.(c), NASA Langley Research Center (a), University of Wisconsin-Madison (b), University of Utah (c) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting We will present new ideas regarding the detection and analysis of multilayered clouds in Moderate Resolution Imaging Spectroradiometer (MODIS) imagery. Over the past year, the MODIS cloud property retrieval effort has matured considerably as algorithms have been improved and the instrument performance has been characterized more accurately. Errors caused by noise, striping, and out-of-band response have been reduced. We have developed and tested different approaches for daytime and nighttime

366

ARM - Publications: Science Team Meeting Documents  

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Parameterizing the Radiative Properties of Midlatitude Clouds Parameterizing the Radiative Properties of Midlatitude Clouds Sassen, K. (a), Comstock, J.M. (b), and Wang, Z. (a), University of Utah (a), Pacific Northwest National Laboratory (b) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting A major goal of the ARM program is to obtain the requisite information needed to improve the treatment of the radiative effects of clouds in large-scale models that ultimately must be relied on to predict the impact of human-induced activities on global climate change. The clouds of the middle and upper troposphere are especially difficult to treat because of their variable optical properties, which range from optically thin in the visible, and graybody emitters in the infrared, to dense blackbody emitters. Approaches to obtain this information involve the development of

367

ARM - Publications: Science Team Meeting Documents  

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Change of Atmospheric Boundary Layer Thermal Regime Induced by Aerosol as Change of Atmospheric Boundary Layer Thermal Regime Induced by Aerosol as Measured by MTP-5 Koldaev, A.V.(a), Kadygrov, E.N.(a), Khaikine, M.N.(a), Kuznetsova, I.N.(b), and Golitsyn, G.S.(c), Central Aerological Observatory (a), Hydrometeorological Center (b), A.M.Obukhov Institute of Atmospheric Physics Russian Academy of Science (c) Fourteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting Change in atmospheric boundary layer (ABL) radiation balance as caused by natural and anthropogenic reasons is an important topic of ARM Project. The influence of aerosol while its concentration was extremely high within a long period of time was studied experimentally. The case was observed in Moscow region with the transport of combustion products from peat and

368

ARM - Publications: Science Team Meeting Documents  

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The Surface Shortwave Radiation Budget in the ECMWF Forecast System The Surface Shortwave Radiation Budget in the ECMWF Forecast System Morcrette, J.-J., European Centre for Medium-Range Weather Forecasts, United Kingdom Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting The surface shortwave radiation (SSR) produced by the ECMWF forecast system since 1989 is studied with reference to the various versions of the shortwave radiation scheme. For the latest 6-spectral interval version, model SSR is compared with surface radiation measurements for recent periods, available as part of the Baseline Surface Radiation Network (BSRN), Surface Radiation Network (SURFRAD), and Atmospheric Radiation Measurement (ARM) programs. Comparisons on one-hour basis are emphasized to allow discrepancies to be more easily linked to differences between model

369

ARM - Publications: Science Team Meeting Documents  

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Winter Surface Radiative Energy Exchange at NSA: Cloudy vs. Clear Sky Winter Surface Radiative Energy Exchange at NSA: Cloudy vs. Clear Sky Stramler, K.(a), Del Genio, A.D.(b), and Rossow, W.(b), Columbia University (a), NASA/GISS (b) Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting ARM measurements at Point Barrow, Alaska show that atmospheric emission drives the winter variability of the surface radiative energy exchange, as the incursion of air masses of differing properties alternately warm and cool the snow surface and the snow-ground interface. The magnitude of the surface radiative energy exchange, however, appears to be in part dictated by the more slowly varying sub-surface temperatures. This is most evident when observing the inter-annual variability of clear-sky surface net longwave radiation at NSA; winter cloudy-sky surface net longwave radiation

370

ARM - Publications: Science Team Meeting Documents  

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0 Science Team Meeting 0 Science Team Meeting 2000 Proceedings Proceedings Sorted by Title Proceedings Sorted by Author Science Team Meeting Proceedings Cover image Proceedings of the Tenth Atmospheric Radiation Measurement (ARM) Science Team Meeting ARM-CONF-2000, March 2000 San Antonio, Texas For proper viewing, many of these proceedings should be viewed with Adobe Acrobat Reader. Download the latest version from the Adobe Reader website. View session papers by Author or Title. * Poster abstract only; an extended abstract was not provided by the author(s). Poster abstracts are not available online for this year. However, if you would like to request a copy of a specific poster abstract, please contact the Web Administrator. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z A Abshire, J.B.

371

ARM - Publications: Science Team Meeting Documents  

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Evaluation of Day-Night Continuity in Retrievals of Cloud Properties from Evaluation of Day-Night Continuity in Retrievals of Cloud Properties from GOES Heck, P.W.(a), Minnis, P.(b), Khaiyer, M.M.(a), Smith, Jr., W.L.(b), Young, D.F.(b), and Nguyen, L.(b), Analytical Services & Materials, Inc. (a), NASA Langley Research Center (b) Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting Currently, multi-spectral algorithms are being used to retrieve microphysical and radiative cloud p roperties from Geostationary Operational Environmental Satellite (GOES) imagery in a near-real time over a domain that includes the ARM Southern Great Plains (SGP) site. The Visible-Infrared-Solar i nfrared-Split window Technique (VISST) and Solar infrared- Infrared-Split window Technique (SIST) a re applied to half-hourly GOES data. The VISST is utilized during daylight hours while

372

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A Continuous Baseline Microphysical Retrieval (MICROBASE): Status of SGP A Continuous Baseline Microphysical Retrieval (MICROBASE): Status of SGP Version 1.2 and Prototype TWP Version Miller, M.A.(a), Johnson, K.L.(a), Jensen, M.P.(b), Mace, G.G.(c), Dong, X.(d), and Vogelmann, A.M.(a), Brookhaven National Laboratory (a), Columbia University (b), University of Utah (c), University of North Dakota (d) Fourteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting The interaction of clouds with incoming and outgoing radiation streams produces discontinuous regions of heating and cooling within the atmospheric column. These regions can influence the atmospheric circulations at multiple scales, as well as modify the existing cloud structures. The Broadband Heating Rate Project (BBHRP) within ARM has the goal of producing instantaneous snapshots of the heating and cooling rate

373

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Characterization and Calibration of the Commercial RSS Slated for Permanent Characterization and Calibration of the Commercial RSS Slated for Permanent Deployment at SGP Kiedron, P., Berndt, J., Yager, E., Harrison, L., and Michalsky, J., Atmospheric Sciences Research Center, SUNY at Albany, New York Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting The ARM program purchased a rotating shadowband spectroradiometer (RSS) that was manufactured by Yankee Environmental Systems, Inc. At ASRC the instrument went through initial acceptance tests and after corrections and modifications made by the manufacturer the instrument was characterized. The angular response, linearity, wavelength registration, out-of-band rejection, slit function, absolute spectral response and noise were measured. The purpose of instrument characterization is to provide the

374

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Cloud Base Height Cloud Base Height Kassianov, E., Long, C., and Christy, J., Pacific Northwest National Laboratory Fourteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting We have suggested a method for estimating Cloud Base Height (CBH) by using paired ground-based Total Sky Imagers (TSI) hemispherical observations (Kassianov and Long, 2003). Our results of the model-output inverse problem showed that, for broken clouds (single layer), moderately accurate CBH retrieval is possible. Both a TSI and a Hemispherical Sky Imager (HSI) were run simultaneously during the ARM Cloudiness Intercomparison IOP (Oklahoma, 2003). We use the data from these two instruments to evaluate the suggested method. We perform the CBH retrieval for a few fields of broken clouds (occurring at different altitudes) by using the suggested method. Then we

375

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Observations and Stochastic Modeling of Shortwave Radiative Transfer at the Observations and Stochastic Modeling of Shortwave Radiative Transfer at the ARM CART Sites Secora, J.M. and Veron, D.E., Rutgers University Stochastic modeling has been shown to be a promising technique for representing shortwave radiative transfer through fractional cloud fields and may be a suitable approach for characterizing the impact of macroscale inhomogeneity of the cloud field on the radiation in an Atmospheric General Circulation Model (AGCM) environment. To ascertain the conditions under which the stochastic approach would be appropriate in an AGCM, several steps have been taken. Initially, we have analyzed both microphysical and geometrical cloud characteristics for one year at three Atmospheric Radiation Measurement (ARM) Program Cloud and Radiation Testbed (CART)

376

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7 Science Team Meeting 7 Science Team Meeting 1997 Proceedings Proceedings Sorted by Title Proceedings Sorted by Author Science Team Meeting Proceedings Cover image Proceedings of the Seventh Atmospheric Radiation Measurement (ARM) Science Team Meeting ARM-CONF-1997, March 1997 San Antonio, Texas For proper viewing, many of these proceedings should be viewed with Adobe Acrobat Reader. Download the latest version from the Adobe Reader website. View session papers by Author or Title. Poster abstracts are not available online for this year. However, if you would like to request a copy of a specific poster abstract, please contact the Web Administrator. A Comparison of Integrated Water Vapor Sensors: WVIOP-96 J.C. Liljegren, E.R. Westwater, and Y. Han A Comparison of Observed Clear-Sky Surface Irradiance with

377

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Infrared Interferometric Measurements of the Air-Sea Temperature Difference Infrared Interferometric Measurements of the Air-Sea Temperature Difference Minnett, P.J., Rosenstiel School of Marine and Atmospheric Science, University of Miami Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting Marine Atmosphere Emitted Radiance Interferometers (M-AERI) have been mounted on several research ships on cruises in the world?s oceans, several in the areas of the ARM TWP and NSA-AAO sites. Accurate measurements of the skin sea-surface temperature and near-surface air temperatures are derived from the infrared spectral measurements, which, unlike conventional measurements of air-sea temperature difference, have a common calibration. This removes the largest source of uncertainty in the measurement of air-sea temperature differences, and thereby a major uncertainty in

378

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The Solar Spectrum 360 to 1050 nm from Rotating Shadowband The Solar Spectrum 360 to 1050 nm from Rotating Shadowband Spectroradiometer (RSS) Measurements at the Southern Great Plains Site Harrison, L.C., Berndt, J.L., Kiedron, P.W., Michalsky, J.J., Min, Q., and Schlemmer, J., Atmospheric Sciences Research Center, State University of New York, Albany Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting Two years of Langley extrapolations made from the Southern Great Plains (SGP) site of the Atmospheric Radiation Measurement (ARM) Program using two very different RSS instruments and a NIST-derived irradiance scale show larger extraterrrestrial solar irradiances in the 400 to 600 nm domain by as much as 4.5% compared to the Labs and Neckels [1968] data. Our results are more congruent with Thuiller et al. [1998] in this domain, but do not

379

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Formation of Fair-Weather Cumuli Formation of Fair-Weather Cumuli Zhu, P. and Albrecht, B., University of Miami Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting This study includes two related parts. In the first part, The formation of fair-weather cumuli has been analyzed based on both a simple mixed layer model and the data collected from the Atmospheric Radiation Measurement (ARM) program at the Southern Great Plains (SGP) site. By analyzing the conditions for the formation of fair-weather cumuli, we illustrate how different processes, such as the surface heat fluxes, the entrainment process at the boundary layer top, the vertical thermodynamic structure above the boundary layer, and the large-scale subsidence, control the formation of clouds. The results of our analysis show that it is the highly

380

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Improved Surface Emissivities Derived from Multispectral Satellite Data Improved Surface Emissivities Derived from Multispectral Satellite Data Over the ARM SGP Smith, W.L., Jr., Minnis, P., and Young, D.F., NASA Langley Research Center Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting Surface emissivity is an important parameter for many remote sensing applications but is difficult to determine because it requires an accurate specification of the surface skin temperature. Because of this, laboratory estimates of the emissivity of pure surfaces are often relied on which generally do not adequately simulate the Earth's natural surfaces as seen from a satellite imager in space. A technique has been developed to derive surface emissivity from clear-sky, multispectral satellite data for three infrared channels (3.9 or 3.7, 10.8 and 12.0 um) common to many of today's

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381

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3 Science Team Meeting 3 Science Team Meeting 1992 Proceedings Proceedings Sorted by Title Proceedings Sorted by Author Science Team Meeting Proceedings Proceedings of the Third Atmospheric Radiation Measurement (ARM) Science Team Meeting CONF-9303112, March 1-4,1993 Norman, Oklahoma For proper viewing, many of these proceedings should be viewed with Adobe Acrobat Reader. Download the latest version from the Adobe Reader website. View session papers by Author or Title. History and Status of the ARM Program - March 1993 History and Status of the Atmospheric Radiation Measurement Program - March 1993 P. Lunn, T. Cress, and G. Stokes Clear Skies A Study of Longwave Radiaiton Codes for Climate Studies: Validation with Observations and Tests in General Circulation Models - an Update R.G. Ellingson and F. Baer

382

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Exploration of Statistical Angular Radiance Closure in Cloudy Skies Exploration of Statistical Angular Radiance Closure in Cloudy Skies Evans, K.F.(a) and Wiscombe, W.J.(b), University of Colorado (a), NASA/Goddard (b) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting Most ARM cloudy sky radiation closure experiments have been performed with broadband fluxes. However, it is difficult to understand the causes of the inevitable discrepencies between the modeled and observed broadband fluxes in those closure experiments because the fluxes are extensively integrated over angle and wavelength. For example, knowing that a particular comparison disagrees by 50 W/m^2 is not particularly helpful in discovering which aspects of cloud remote sensing, radiative transfer, or measurements might be in error. Angular radiance closure compares the measured and

383

ARM - Publications: Science Team Meeting Documents  

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A Comparison of the TSI/WSI Cloud Fraction Estimates at the SGP A Comparison of the TSI/WSI Cloud Fraction Estimates at the SGP Slater, D.W.(a), Long, C.N.(a), and Tooman, T.P.(b), Pacific Northwest National Laboratory (a), Sandia National Laboratory (b) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting Beginning with the installation of the Total Sky Imager (TSI) at the ARM Southern Great Plains site in July, 2000, both the TSI and the Whole Sky Imager (WSI) have operated simultaneously in close proximity to one another. Both systems produce all-sky cloud fraction estimates as part of their primary products, though each uses distinctly different methods to arrive at these estimates. The purpose of this study is to provide a link between the large body of estimates produced by the WSI before the

384

ARM - Publications: Science Team Meeting Documents  

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1 Science Team Meeting 1 Science Team Meeting 2001 Proceedings Proceedings Sorted by Title Proceedings Sorted by Author Science Team Meeting Proceedings Cover image Proceedings of the Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting ARM-CONF-2001, March 2001 Atlanta, Georgia For proper viewing, many of these proceedings should be viewed with Adobe Acrobat Reader. Download the latest version from the Adobe Reader website. View session papers by Author or Title. * Poster abstract only; an extended abstract was not provided by the author(s). A 3-Year Climatology of Cloud and Radiative Properties Derived from GOES-8 Data Over the Southern Great Plains M.M. Khaiyer, A.D. Rapp, D.R. Doelling, M.L. Nordeen, W.L. Smith, Jr., and P. Minnis A 4-Year Study of the RASS Temperature Bias

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A Tale of Two Cirrus A Tale of Two Cirrus Poellot, M.R.(a), Mace, G.G.(b), and Arnott, W.P. (c), University of North Dakota (a), University of Utah (b), Desert Research Institute (c) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting On May 8, 1998, an orographically-forced cirrus layer overspread the DOE ARM Program's Southern Great Plains site and subsequently became mixed with anvil outflow from thunderstorms. These clouds were sampled in situ by the University of North Dakota Citation aircraft and remotely by an array of ground-based radar, lidar and radiometric instrumentation. The first of two aircraft flights sampled the orographic cirrus through a series of step climbs and spirals. During that time, the cloud was relatively uniform in depth and structure. Shortly after the start of the second flight, the

386

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Investigation of the Aerosol Indirect Effect at the Southern Great Plains Investigation of the Aerosol Indirect Effect at the Southern Great Plains Using Ground Based Remote Sensors and Modeling Feingold, G.(a), Lane, D.(b), and Min, Q.(c), NOAA/ETL (a), Rutgers University (b), ASRC, SUNY Albany (c) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting We are using ground-based remote sensors, supplemented by in situ measurements when available, to explore the aerosol indirect effect in non-precipitating, ice-free clouds. The study uses archived ARM data on sub-cloud aerosol extinction, cloud liquid water path, cloud optical depth, drop effective radius, and boundary layer dynamics to investigate the relationship between aerosol extinction and drop effective radius. Two approaches are being taken: the first is an empirical approach which

387

ARM - Publications: Science Team Meeting Documents  

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Large Eddy Simulations of Fair-Weather Cumulus Case at SGP Site Large Eddy Simulations of Fair-Weather Cumulus Case at SGP Site Zhu, P. and Albrecht, B.A., University of Miami Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting A fair-weather cumulus (FWC) case observed on July 6, 1997 at the ARM SGP site is simulated using RAMS model. In this study, we performed a series of numerical experiments to study the basic physics underlying the FWC and the evolution of these clouds in response to the change of external forcings and conditions. The simulations indicate that the evolution of shallow cumuli is very sensitive to the initial vertical structure of moisture and the variation of the entrainment moisture fluxes. Based on the penetration theory, we are able to develop a cloud initiation parameterization using

388

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Results of the Atmospheric Aerosol Condensation Activity Studies Results of the Atmospheric Aerosol Condensation Activity Studies Isakov, A.A. and Golitsyn, G.S., A.M.Obukhov Institute of Atmospheric Physics Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting Some new results are presented. of investigations of optical and microphysical characteristics of the atmospheric surface layer aerosol by means of spectropolarimeter The daily measurements were carried out in February - April 2000 at the Zvenigorod Scientific Station of the Institute within the Institut's ARM measurements Program. The spectropolarimeter measured the spectral dependencies of the polarization components of direct scattering coefficient D at three angles j = 450,900,1350 in spectral region l= 0.4 -0.75 mcm. During the measurement period about 500 records

389

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Radiative Effects of Cloud Inhomogeneity and Geometric Association over the Radiative Effects of Cloud Inhomogeneity and Geometric Association over the Tropical Western Pacific Warm Pool Jensen, M.P.(a) and DelGenio, A.D.(b), Department of Applied Physics and Applied Mathematics, Columbia University, NASA GISS (a), NASA GISS (b) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting The radiative and microphysical characteristics for several precipitating anvil systems observed by the TRMM satellite over the Manus or Nauru Island ARM sites are modelled. Reflectivity data from the TRMM Precipitation radar and GMS satellite infrared radiometer measurements are used to parametrize the three-dimensional cloud microphysics of each precipitating cloud system. These parameterized cloud properties are used as input for a

390

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7 Science Team Meeting 7 Science Team Meeting 1997 Proceedings Proceedings Sorted by Title Proceedings Sorted by Author Science Team Meeting Proceedings Cover image Proceedings of the Seventh Atmospheric Radiation Measurement (ARM) Science Team Meeting ARM-CONF-1997, March 1997 San Antonio, Texas For proper viewing, many of these proceedings should be viewed with Adobe Acrobat Reader. Download the latest version from the Adobe Reader website. View session papers by Author or Title. Poster abstracts are not available online for this year. However, if you would like to request a copy of a specific poster abstract, please contact the Web Administrator. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z A Acharya, P. Spectral Resolution Effects on Solar Irradiance Calculations Ackerman, S.A.

391

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Mapping of Surface Reflectance over the Southern Great Plains Region from Mapping of Surface Reflectance over the Southern Great Plains Region from Multiple Satellites Trishchenko, A.P.(a), Li, Z. (a,b), and Park, W. (a), Canada Centre for Remote Sensing, Ottawa, Canada (a), Now at ESSIC, Department of Meteorology, College Park (b) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting The ground-based ARM observations are limited to a handful of locations sparsely distributed in the South Great Plains (SGP). Mapping of surface narrow and broadband albedos are necessary for modeling and remote sensing studies to better describe the spatial variability of surface boundary conditions. In this study, we present surface narrowband and broadband reflectance, as well as the normalized difference vegetation index over the

392

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The CCPP-ARM Parameterization Test Bed (CAPT) The CCPP-ARM Parameterization Test Bed (CAPT) Potter, G.L.(a), Williamson, D.L.(b), Cederwall, R.T.(a), and Xie, S.(a), Lawrence Livermore National Laboratory (a), National Center for Atmospheric Research (b) In an attempt to improve GCMs that are used to project future climate change, we have borrowed a technique from the NWP community to identify and isolate model errors. We are using high-frequency (~6 hourly) NWP analyses both to realistically initialize (using the state fields: T, U, V, Q, and Ps) a climate GCM to evaluate the accuracy of its subsequent short-range weather forecasts and to diagnose the structure and growth of the identified forecast errors. The rationale is that most of the climate GCM's forecast errors can be attributed to parameterization deficiencies, once

393

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3 Science Team Meeting 3 Science Team Meeting 2003 Proceedings Proceedings Sorted by Title Proceedings Sorted by Author Science Team Meeting Proceedings Cover image Proceedings of the Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting ARM-CONF-2003, April 2003 Broomsfield, Colorado For proper viewing, extended abstracts should be viewed with Adobe Acrobat Reader. Download the latest version from the Adobe Reader website. View session papers by Author or Title. * Poster abstract only; an extended abstract was not provided by the author(s). A 20-year Data Set of Downwelling Longwave Flux at the Arctic Surface from TOVS Satellite Data Francis, J.A., Schweiger, A., and Key, J. A Comparison of Aerosol Scattering Parameters Obtained by Ground-Based Remote Sensing and In-situ Profile Flights*

394

ARM - Publications: Science Team Meeting Documents  

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Meeting Meeting 2002 Proceedings Proceedings Sorted by Title Proceedings Sorted by Author Science Team Meeting Proceedings Cover image Proceedings of the Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting ARM-CONF-2002, April 2002 St. Petersburg, Florida For proper viewing, extended abstracts should be viewed with Adobe Acrobat Reader. Download the latest version from the Adobe Reader website. View session papers by Author or Title. * Poster abstract only; an extended abstract was not provided by the author(s). A B C D E F G H I J K L M N O P Q R S T U V W X Y Z A Ackerman, S.A. Cloud Phase Determination in the Arctic Using AERI Data ERBE OLR and Cloud Type by Split Window* Ackerman, T.P. A Climatology of Shortwave Cloud Radiative Forcing Using Ground-Based Broadband Radiometric Time-Series*

395

ARM - Publications: Science Team Meeting Documents  

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New Meteorological Applications Using AERI Thermodynamic Profiling New Meteorological Applications Using AERI Thermodynamic Profiling Feltz, W.F.(a), Howell, H.B.(a), Knuteson, R.O.(a), Mecikalski, J.(b), Bedka, K.(a), Tanamachi, R.L.(c), and Posselt, D.(d), University of Wisconsin SSEC/CIMSS (a), University of Alabama - Huntsville (b), University of Oklahoma (c), Colorado State University (d) The DOE ARM program has supported the development of a robust and operational thermodynamic retrieval algorithm using AERI high spectral resolution infrared radiances. These retrievals of temperature and water vapor have been used for a number of ARM research projects including planetary boundary layer (PBL) large eddy simulation, NWP validation, PBL height estimation, and for investigating the utility of driving SCM/CRM models continuously at the SGP site. New AERIplus retrieval meteorological

396

ARM - Publications: Science Team Meeting Documents  

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On the Uncertainty of Inferring Absolute Cloud Fraction from Time Series of On the Uncertainty of Inferring Absolute Cloud Fraction from Time Series of Narrow Field of View Observations Ma, Y.-T.(a) and Ellingson, R. G.(b), University of Maryland at College Park (a), Florida State University (b) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting One way to parameterize longwave 3-D cloud effects is to relate the various cloud properties to a statistical cloud field parameter called the Probability of Clear Line of Sight (PCLS) and then to a simple integral parameter - the effective cloud fraction. In our ongoing study, we are trying to test various PCLS models with ARM cloud observations. Many of the cloud properties must be inferred from time series of zenith observations, whereas spatially averaged quantities are the ones desired. What are the

397

ARM - Publications: Science Team Meeting Documents  

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The Influence of Clouds, Aerosols, and Water Vapor on the Discrepancy The Influence of Clouds, Aerosols, and Water Vapor on the Discrepancy Between Modeled and Observed Atmospheric Absorption Arking, A. Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting Daily mean estimates of atmospheric absorption of solar radiation at the ARM/SGP site are obtained for 36 days during the fall season in 1995 and 1997. They are based on broadband observations of surface flux and satellite estimates of TOA albedo. Mean absorption in the vertical column is 0.246 (expressed as a ratio with respect to the incident flux at TOA). For 13 of the days, which are entirely free of clouds, the mean absorption is 0.245. Although clouds have no systematic effect on absorption, they do have an effect---sometimes causing an increase and sometimes a decrease

398

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Cloud Property Retrieval Using Combined Ground-Based Remote Sensors Cloud Property Retrieval Using Combined Ground-Based Remote Sensors Wang, Z. and Sassen, K., University of Utah Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting The Atmospheric Radiation Measurements Program (ARM) is making measurements with diverse ground-based remote sensors. To provide more complete and accurate cloud information, it is necessary to combine diverse measurements because of the different capabilities of various sensors. In this study, a remote sensing cloud detection algorithm has been developed that can differentiate between various atmospheric targets such as ice and water clouds, virga, precipitation, and aerosol layers. Cloud type and macrophysical properties are identified by combining ground-based polarization lidar, millimeter wave radar, infrared radiometer, and dual

399

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The Radiative Properties of Uniform and Broken Stratus: An Observational The Radiative Properties of Uniform and Broken Stratus: An Observational and Modelling Study Utilizing the Independent Column Approximation for Solar Radiative Transfer Clothiaux, E.E., The Pennsylvania State University; Barker, H.W., Atmospheric Environment Service of Canada; Kato, S., Hampton University; Dong, X., Analytical Service and Materials, Inc. Ackerman, T.P., The Pennsylvania State University; Liljegren, J.C., Ames Laboratory Ninth Atmospheric Radiation Measurement (ARM) Science Team Meeting The Millimeter-Wave Cloud Radar (MMCR) has operated continuously at the Atmospheric Radiation Measurement (ARM) Program's Southern Great Plains (SGP) site since November 11, 1996. As yet, much of the early data has not been calibrated correctly and insect contamination in the boundary layer is

400

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High Latitude Cloud Microphysical Properties from FTIR Data High Latitude Cloud Microphysical Properties from FTIR Data Lubin, D., Scripps Institution of Oceanography Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting The ARM AERI instruments record downwelling radiance spectra with sufficient radiometric calibration to enable the retrieval of important cloud microphysical properties. This poster will describe how radiative transfer simulations that include cloud thermodynamic phase (liquid water, ice, mixed phase) can be utilized with Fourier Transform Infrared (FTIR) spectroradiometer data. The presence of the ice phase in cloud alters the slope of the brightness temperature spectrum between 800 - 1200 inverse centimeters, such that ice can often be detected. The AERI near infrared channel also may have potential for cloud phase as discrimination.

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While these samples are representative of the content of NLEBeta,
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401

ARM - Publications: Science Team Meeting Documents  

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A Compact Millimeter-Wave Radar for UAV Applications A Compact Millimeter-Wave Radar for UAV Applications Bambha, R., Carswell, J., and Swift, C., University of Massachusetts Ninth Atmospheric Radiation Measurement (ARM) Science Team Meeting Assembly of the Compact Millimeter-wave Radar (CMR) has been completed at the University of Massachusetts, and ground-based cloud measurements have been acquired. The CMR is a 95-GHz solid-state radar intended for airborne cloud measurements. Funding for the project was provided by the Atmospheric Radiation Measurement-Unmanned Aerospace Vehicle (ARM-UAV) program with the eventual goal of developing a radar capable of operating on the Altus UAV. Simultaneous measurements made by CMR and the Cloud Profiling Radar System (CPRS) have been made to evaluate CMR's performance. CPRS is a larger

402

ARM - Publications: Science Team Meeting Documents  

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Evaluation of Upper Tropospheric Water Vapor in the NCAR Community Climate Evaluation of Upper Tropospheric Water Vapor in the NCAR Community Climate Model, CCM3, Using Modeled and Observed HIRS Radiances Iacono, M.J., Delamere, J.S., Mlawer, E.J., and Clough, S.A., Atmospheric and Environmental Research, Inc. Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting Upper tropospheric water vapor (UTWV) simulated by the National Center for Atmospheric Research Community Climate Model, CCM3, is evaluated by comparing modeled, clear sky, brightness temperatures to those observed from space by the High-resolution Infrared Radiation Sounder (HIRS). The climate model was modified to utilize a highly accurate longwave radiation model, RRTM, and a separate radiance module, both developed for the Atmospheric Radiation Measurement (ARM) Program. The radiance module

403

ARM - Publications: Science Team Meeting Documents  

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3D Delta-Diffusion and IR Monte-Carlo Methods for Radiative Transfer 3D Delta-Diffusion and IR Monte-Carlo Methods for Radiative Transfer Applied to Inhomogeneous Cirrus over the ARM-SGP Site Chen, Y.(a), Liou, K.N.(a), Gu, Y.(a), Ou, S.C.(a), and Mace, G.G.(b), University of California, Los Angeles (a), University of Utah (b) Fourteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting An efficient method based on a full multigrid approach has been developed to solve the 3D delta-diffusion radiative transfer equation, which utilizes four-term spherical harmonics expansion for the phase function and intensity. This method first solves the inhomogeneous partial differential equation on a number of coarse grids and subsequently performs interpolation to predivided fine grids to speed up the convergence of the solution, particularly useful for cloud radiation parameterization in

404

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Anomalous Radiative Absorption and Unbounded Cascade Models of Cloud Anomalous Radiative Absorption and Unbounded Cascade Models of Cloud Fields Schertzer, D., and Larchevêque, M., Université P.&M. Curie, Paris, France; Lovejoy, S., McGill University; Naud, C., Blackett Laboratory, Imperial College, London Ninth Atmospheric Radiation Measurement (ARM) Science Team Meeting One of the most achieving results of Atmospheric Radiation Measurement (ARM) Program could well have been the empirical finding of the anomalous radiative absorption of the atmosphere. We demonstrate that unbounded cascade models of cloud fields, rather than bounded cascade models, could give a theoretical and quantitative understanding of this phenomenon. Indeed, the former models keep contact with the physics and coherence of the turbulent cascades (velocity, temperature and liquid water content) and

405

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Analysis of the Aerosol-Cloud Interactions from Aircraft, Surface Analysis of the Aerosol-Cloud Interactions from Aircraft, Surface Measurements, and Cloud Parcel Model During the March 2000 IOP at the ARM SGP Site Delene, D.J.(a), Dong, X.(a), Chen, Y.(b), Poellot, M.(a), and Penner, J.E.(b), University of North Dakota (a), University of Michigan (b) Fourteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting One of the largest uncertainties in estimating anthropogenic forcing of climate change and in predicting future climates is the relationship between atmospheric aerosols and cloud properties. Aerosols affect cloud optical properties, cloud water content and cloud lifetime. A higher aerosol number concentration generally results in the nucleation of more smaller cloud droplets, which increases cloud albedo and results in a

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ARM - Publications: Science Team Meeting Documents  

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Meeting Meeting 2003 Proceedings Proceedings Sorted by Title Proceedings Sorted by Author Science Team Meeting Proceedings Cover image Proceedings of the Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting ARM-CONF-2003, April 2003 Broomsfield, Colorado For proper viewing, extended abstracts should be viewed with Adobe Acrobat Reader. Download the latest version from the Adobe Reader website. View session papers by Author or Title. * Poster abstract only; an extended abstract was not provided by the author(s). A B C D E F G H I J K L M N O P Q R S T U V W X Y Z A Abdou, W.A. Intercomparison of MISR Aerosol Retrievals with Sunphotometer and MODIS Results* Ackerman, T.P. Comparison of Observed and Modelled Liquid Water Path for Stratus and Stratocumulus Clouds at the SGP*

407

ARM - Publications: Science Team Meeting Documents  

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Consistency of ARESE II Cloud Absorption Estimates and Sampling Issues Consistency of ARESE II Cloud Absorption Estimates and Sampling Issues Oreopoulos, L.(a), Marshak, A.(a), and Cahalan, R.F.(b), JCET – University of Maryland Baltimore County (a), NASA-GSFC (b) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting Data from three cloudy days (March 3, 21, 29, 2000) of the ARM Enhanced Shortwave Experiment II (ARESE II) were analyzed. Grand averages of broadband absorptance among three sets of instruments were compared. Values of fractional absorptance were ~0.20-0.22 for all three days with the exception of March 3 when two sets of instruments gave values smaller by ~ 0.03-0.04. The robustness of these values was investigated by looking into possible sampling problems mainly with the aid of 500 nm spectral fluxes.

408

ARM - Publications: Science Team Meeting Documents  

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The MERGED_SOUNDING VAP: A Status Report and Description The MERGED_SOUNDING VAP: A Status Report and Description Miller, M.A.(a), Troyan, D.T.(a), and Mace, G.G.(b), Brookhaven National Laboratory (a), University of Utah (b) The Value-added Product (VAP) known as MERGED_SOUNDING has been deemed a very desirous component of ARMs suite of VAPs. To have a thermodynamics profile of the atmosphere at one-minute temporal intervals and uniform height levels available for ARM data users eliminates much redundancy and inconsistency as investigators will now have standard atmospheric profiles at their disposal. The values which constitute the thermodynamics profile include: Temperature, Relative Humidity, Vapor Pressure, Barometric Pressure, Wind Speed and Direction, and Dewpoint. The data integrated to form the MERGED_SOUNDING data stream comes from radiosonde launches, model

409

ARM - Publications: Science Team Meeting Documents  

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5 Science Team Meeting 5 Science Team Meeting 1995 Proceedings Proceedings Sorted by Title Proceedings Sorted by Author Science Team Meeting Proceedings Proceedings of the Fifth Atmospheric Radiation Measurement (ARM) Science Team Meeting ARM-CONF-1995, March 1995 San Diego, California For proper viewing, many of these proceedings should be viewed with Adobe Acrobat Reader. Download the latest version from the Adobe Reader website. View session papers by Author or Title. * Poster abstract only; an extended abstract was not provided by the author(s). A B C D E F G H I J K L M N O P Q R S T U V W X Y Z A Ackerman, T.P. A Boundary-Layer Cloud Study Using Southern Great Plains Cloud and Radiation Testbed (CART) Data A Comparison of Radiometric Fluxes Influenced by Parameterized Cirrus Clouds with Observed Fluxes at the Southern Great Plains (SGP) Cloud

410

ARM - Publications: Science Team Meeting Documents  

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Cirrus Cloud Statistics from a Cloud-Resolving Model Simulation Compared to Cirrus Cloud Statistics from a Cloud-Resolving Model Simulation Compared to Cloud Radar Observations Krueger, S.K. (a), Luo, Y. (a), Mace, G.G. (a), and Xu, K.-M. (b), University of Utah (a), NASA Langley Research Center (b) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting Mace, Clothiaux, and Ackerman (2000; MCA) determined the properties of cirrus clouds derived from one year (December 1996 to November 1997) of MMCR data collected at the SGP ARM site in Oklahoma. They also used additional measurements to retrieve the bulk microphysical properties of thin cirrus cloud layers. We sampled CRM results in a way that allows direct comparison to MCA's observations and retrievals of cirrus cloud properties. This allows evaluation, in a statistical sense, of the CRM's

411

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Correction of Sonde Upper Tropospheric Humidity Through Radiance Correction of Sonde Upper Tropospheric Humidity Through Radiance Assimilation Soden, B.J.(a), Turner, D.D.(b), and Lesht, B.M.(c), NOAA/GFDL (a), Pacific Northwest Natinal Laboratory (b), Argonne National Laboratory (c) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting The difficulty of measuring upper tropospheric water vapor from radiosonde instrumentation is widely recognized. Recent results from several ARM IOPs and the AFWEX field campaign have demonstrated a substantial dry bias in sonde measurements. Existing corrections for these measurements can improve the moisture concentrations at lower levels, but offer little improvement in the upper troposphere. Unfortunately, accurate measurements of upper tropospheric water vapor are necessary to constrain the transfer of

412

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Properties Over the North Slope of Alaska: A Comparison of Properties Over the North Slope of Alaska: A Comparison of Ground-Based and Space-Based Retrievals Storvold, R.(a), Marty, C.(a), Xiong, X.(b), Stamnes, K.H.(c), and Zak, B.D.(d), University of Alaska Fairbanks (a), QSS group Inc. (b), Stevens Institute of Technology (c), Sandia National Laboratories (d) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting In the Arctic there is a large seasonal variability in cloud cover, cloud base height, and cloud liquid water content. Cloud properties above the ARM/NSA CART site in Barrow are retrieved using a suite of different instruments and retrieval techniques. Daily and monthly averages of the cloud properties are derived for a full annual cycle using data from LIDAR, Whole Sky Imager, Cloud Radar, Micro Wave Radiometer, and Broadband

413

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Impact of an Improved Longwave Radiation Model, RRTM, on the Energy Budget Impact of an Improved Longwave Radiation Model, RRTM, on the Energy Budget and Thermodynamic Properties of the NCAR Climate Model, CCM3 Iacono, M.J., Mlawer, E.J., and Clough, S.A., Atmospheric and Environmental Research, Inc. Ninth Atmospheric Radiation Measurement (ARM) Science Team Meeting The effect of introducing a new longwave radiation parameterization, Rapid Radiative Transfer Model (RRTM), on the energy budget and thermodynamic properties of Version 3 of the National Center for Atmospheric Research (NCAR) Community Climate Model (CCM3) will be presented. RRTM is a rapid and accurate k-distribution radiative transfer model that has been developed for the Atmospheric Radiation Measurement (ARM) Program. Among the important features of the RRTM are its connection to radiation

414

ARM - Publications: Science Team Meeting Documents  

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Characterizing Diurnal CO2 Cycles in the Continental Boundary Layer Using Characterizing Diurnal CO2 Cycles in the Continental Boundary Layer Using Precise Concentration Measurements and a Simple Numerical Model Torn, M.S.(a), Riley, W.(a), Rischer, M.L.(a), Biraud, S.(a), and Berry, J.(b), Lawrence Berkeley National Laboratory (a), Carnegie Institution of Washington (b) Fourteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting In continental regions, atmospheric CO2 profiles are strongly influenced by atmospheric dynamics as well as ecosystem and anthropogenic fluxes. Relating site level measurements or atmospheric profiles to regional CO2 budgets may require methods to represent or evaluate these influences. At the Southern Great Plains ARM-CART, we are measuring precise CO2 concentrations continuously at 2-60 m and weekly at 300 and 3300 m agl. CO2

415

ARM - Publications: Science Team Meeting Documents  

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Validation of TERRA MODIS Cloud Properties Using Ground-Based Measurements Validation of TERRA MODIS Cloud Properties Using Ground-Based Measurements at the DOE ARM SGP Site Dong, X.(a), Xi, B.(a), Minnis, P.(b), Wielicki, B.(b), Sun-Mack, S.(c), Chen,Y.(c), and Mace, G.G.(d), University of North Dakota (a), NASA/Langley Research Center (b), SAIC, Inc. (c), University of Utah (d) Cloud macrophysical and microphysical/optical properties derived from the Moderate Resolution Imaging Spectroradiometer (MODIS) on Terra as part of the Clouds and the Earth's Radiant Energy System (CERES) project during February 2000-December 2001 are compared to simultaneous ground-based observations. The ground-based data taken over the Atmospheric Radiation Measurement (ARM) Program Southern Great Plains (SGP) site are used as cloud truth data set in the validation of the CERES Science Team derived

416

Calibration Facilities Documents | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Services » Calibration Facilities » Calibration Facilities Services » Calibration Facilities » Calibration Facilities Documents Calibration Facilities Documents October 17, 2013 Field Calibration Facilities for Environmental Measurement of Radium, Thorium, and Potassium (October 2013) The first edition of this report, released in October 1982, presented physical-characteristic information for the various DOE radiologic-instrument calibration facilities located throughout the U.S. Three subsequent editions have been released in an effort to update information regarding the current status of the facilities. June 30, 1994 Field Calibration Facilities for Environmental Measurement of Radium, Thorium, and Potassium (June 1994) Field Calibration Facilities for Environmental Measurement of Radium, Thorium, and Potassium (June 1994)

417

ARM - Forms  

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ARMForms About Become a User Recovery Act Mission FAQ History Organization Participants Facility Statistics Forms Contacts Facility Documents ARM Management Plan (PDF, 335KB) Field...

418

ARM - Publications: Science Team Meeting Documents  

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site. We illustrate the high precision CO2 and CO2 isotope monitoring system at the 60 m tower of the Central Facility. Preliminary results will be shown from the (1) initial...

419

ARM - Publications: Science Team Meeting Documents  

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DOE National User Facility in the Tropical Western Pacific Jones, L.(a), Sisterson, D.L.(b), Porch, W.(a), Mather, J.H.(c), and Long, C.N.(c), Los Alamos National Laboratory (a),...

420

ARM - Publications: Science Team Meeting Documents  

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path (LWP) data from the microwave water radiometer (MWR) at the central facility of the Oklahoma Cloud and Radiation Testbed (CART) site was analyzed by Wiscombe et al. (1995)....

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421

ARM - Publications: Science Team Meeting Documents  

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Angular Distribution of Intensity in a Flux of Radiation Scattered by a Angular Distribution of Intensity in a Flux of Radiation Scattered by a Cloud Dvoryashin, S.V., Shukurov, K.A., Shukurov, A.K., and Golitsyn, G.S., A.M.Obukhov Institute of Atmospheric Physics, RAS Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting A study of the angular distribution of intensity in a flux of solar radiation scattered by a cloud was carried out in conditions of translucent clouds (the disk of the Sun is visible). Using the digital video camera KODAK DC200, mounted on the sun tracker, the sky images with the angle of view 38 0) have been obtained in cloudy and cloudless conditions. During measurements the disk of the Sun was closed with a blend. Using the specially developed program the photometry of the received images was

422

ARM - Publications: Science Team Meeting Documents  

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On Problems in Simulating Boundary-layer Cumulus Clouds with Third-Order On Problems in Simulating Boundary-layer Cumulus Clouds with Third-Order Turbulence Closure Models Cheng, A.(a) and Xu, K.-M.(b), Atmospheric Sciences, NASA Langley Research Center (a), Center for Atmospheric Sciences, Hampton University (b) Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting A hierarchy of third-order turbulence closure models are used to simulate boundary-layer cumulus clouds from the Atmospheric Radiation Measurement in this study. A moist spurious oscillation is found in the Level-3 model, which predicts all third moments. The period of the oscillation is about 1000 s, which is resulted from the interaction of the mean liquid water gradient and the liquid water buoyancy terms in the third-moment equations. A reasonably large diffusion coefficient and a large dissipation at its

423

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Cloud-Radiation-Aerosol Experiment (1996) at IAPh, Russia Cloud-Radiation-Aerosol Experiment (1996) at IAPh, Russia Golitsyn, G.S., Anikine, P.P., and Sviridenkov, M.A., Obukhov Institute of Atmospheric Physics, Russian Academy of Sciences Eighth Atmospheric Radiation Measurement (ARM) Science Team Meeting In 1996, local measurements of the optical properties of the near-surface aerosol were carried out parallel with aureole measurements of the aerosol in the atmospheric column. The spectral radiation was measured by a complex of spectrometers. Global radiation was controlled by standard equipment (pyrheliometer, pyranometer, pyrgeometer). A microwave sounder was used to determine the liquid water path of clouds and water vapor content. Advanced Very High Resolution Radiometer (AVHRR) data from the National Oceanic and

424

ARM - Publications: Science Team Meeting Documents  

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Raman Lidar Characterization of the Vertical Variability of Aerosols and Raman Lidar Characterization of the Vertical Variability of Aerosols and Water Vapor Over the SGP Ferrare, R.A. (a), Turner, D.D. (b,g), Brasseur, L.H. (c), Tooman, T.P. (d), Dubovik, O. (e), Goldsmith, J.E.M. (d), Ogren, J.A. (f), and Feltz, W. (g), NASA Langley Research Center (a), Pacific Northwest National Laboratory (b), Science Applications International Corporation/NASA/LaRC (c), Sandia National Laboratories (d), SSAI/NASA Goddard Space Flight Center (e), NOAA Climate Monitoring and Diagnostics Laboratory (f), University of Wisconsin-Madison (g) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting The automated Southern Great Plains (SGP) Cloud and Radiation Testbed (CART) Raman Lidar routinely measures profiles of water vapor mixing ratio,

425

ARM - Publications: Science Team Meeting Documents  

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A Comparison of Surface Sensible Heat Flux at Atqasuk and Barrow A Comparison of Surface Sensible Heat Flux at Atqasuk and Barrow Shaw, W.J. (a), Doran, J.C. (b), and Hubbe, J.M. (c), Pacific Northwest National Laboratory Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting As part of the effort to discover the feedbacks between low-level arctic stratus and surface fluxes, we have operated an acoustic anemometer near Barrow, Alaska and a dual wavelength scintillometer near Atqasuk, which is 100 km to the south, in order to measure the surface turbulence heat flux. The systems operated unattended during the spring melt period of 2000, and the data were logged via internet or telephone connections. The acoustic anemometer was mounted on a tower attached to a barge grounded on a low island on the northeast side of Elson Lagoon. The anemometer was 8.5 m

426

ARM - Publications: Science Team Meeting Documents  

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A Satellite Cloud, Radiation and Precipitation Data Set for Cloud Model A Satellite Cloud, Radiation and Precipitation Data Set for Cloud Model Evaluation Xu, K.-M.(a), Wielicki, B.A.(a), Wong, T.(a), and Randall, D.A.(b), NASA Langley Research Center (a), Colorado State University (b) Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting To systematically evaluate cloud models including large-eddy simulation (LES), cloud-resolving models (CRMs), cloud parameterizations in general circulation models (GCMs), one needs a large set of cloud, radiation and precipitation data that are matched with simultaneous atmospheric state data. We have been using a technique to produce such a data set at the NASA Langley Research Center. Specifically, this technique classifies EOS (Earth Observing System) satellite data into distinct cloud systems or "cloud

427

ARM - Publications: Science Team Meeting Documents  

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NCDX: NetCdr Data eXtraction utility for Examination and Visualization of NCDX: NetCdr Data eXtraction utility for Examination and Visualization of Netcdf Data Flynn, C.J. and Ermold, B., Pacific Northwest National Laboratory Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting NCDX is a command-line utility designed for routine examination and extraction of data from netcdf files. Data can be displayed graphically (line-plot, scatter-plot, overlay, color-intensity, etc.) or extracted as ASCII data. In either case, results can be saved to disk or viewed directly on screen. Date and time can be displayed in a large variety of formats including calendar, julian, HHMMSS, fractional day, and others. It can accept multiple netcdf files as input producing merged results. NCDX can be used in either interactive or batch-processing mode making it suitable for

428

ARM - Publications: Science Team Meeting Documents  

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Absolute Radiance Calibration Techniques for the Whole Sky Imager Absolute Radiance Calibration Techniques for the Whole Sky Imager Shields, J.E. (a), Johnson, R.W. (a), Tooman, T.P. (b), Karr, M.E. (a), Burden, A.R. (a), and Baker, J.G. (a), Scripps Institution of Oceanography (a), Sandia National Laboratories (b) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting The Day/Night Whole Sky Imager is designed to provide absolute radiance distributions over the full upper hemisphere, as well as providing an assessment of cloud fraction and cloud spatial properties. In order to provide radiance distributions, the instrument must be calibrated using absolute radiometry techniques adapted for use with an imager. These techniques are particularly demanding due to the large dynamic range required to acquire data from full daylight to starlight. For example, a

429

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Activation Control: An Alternate Framework for Explaining Variation of Deep Activation Control: An Alternate Framework for Explaining Variation of Deep Convection Barr-Kumarakulasinghe, S.A., Brookhaven National Laboratory Eighth Atmospheric Radiation Measurement (ARM) Science Team Meeting An alternate conceptual framework with the ability to explain large scale variation in convection, but still have the ability to explain shorter time scale (weekly) variation of convection is presented. In contrast, the current quasi-equilibrium and statistical equilibrium control framework, appears to be only successful in explaining monthly and large scale variations in convection and circulation patterns. Mapes has referred to an alternate concept as activation control, though not actually offering a solution or methodology. This abstract presents an activation control

430

ARM - Publications: Science Team Meeting Documents  

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Evaluation of the Plane-Parallel Model from MISR Measurements Evaluation of the Plane-Parallel Model from MISR Measurements Horvath, A.(a), Davies, R.(b), and Diner, D.J.(b), University of Arizona (a), Jet Propulsion Laboratory (b) Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting Due to its simplicity and computational speed, the 1-D plane-parallel model enjoys widespread popularity in the satellite remote sensing of cloud microphysical properties. Just how well this model describes real clouds is a question rather difficult to answer with traditional single-angle observations. With the advent of near-simultaneous multiangle measurements, it is possible to evaluate the validity of the plane-parallel approach. This study used data from the Multiangle Imaging SpectroRadiometer (MISR) on NASA's TERRA (EOS-AM) platform. Only liquid clouds over oceans were

431

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Simulation of the Annual Cycle of Surface Albedo for SHEBA Simulation of the Annual Cycle of Surface Albedo for SHEBA Schramm, J.L., and Curry, J.A., University of Colorado Ninth Atmospheric Radiation Measurement (ARM) Science Team Meeting A single-column ice thickness distribution model is used to simulate the annual cycle of sea ice, snow and surface radiation characteristics over the Surface Heat Budget of the Arctic Ocean (SHEBA). The model is forced using surface flux data obtained at SHEBA. This poster focuses on the simulated surface albedo and the principal factors that determine it (snow and melt ponds). By comparing the model simulations with SHEBA observations, an assessment of our current parameterizations of snow, melt ponds and surface albedo is given. Some improvements to our model parameterizations have already been made based upon the comparison with

432

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Cloud Fraction Retrieval Utilizing Whole Sky Imagers Cloud Fraction Retrieval Utilizing Whole Sky Imagers Tooman, T.P., Sandia National Laboratories; Moore, S., and Sowle, D., Mission Research Corporation; Shields, J., Marine Physical Laboratory Eighth Atmospheric Radiation Measurement (ARM) Science Team Meeting Long-term statistics on cloud cover and cloud thickness are desirable for understanding how clouds affect climate. We are attempting to use images collected by the Whole Sky Imager (WSI) to extract this information. For nighttime retrieval, we intend to develop algorithms and software to detect star occultations due to clouds. For daytime retrievals, we intend to develop an appoach based on sky radiance variations. We have implemented software to detect star locations, to map image pixel space to celestial

433

ARM - Publications: Science Team Meeting Documents  

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Parameterization of Cloud-Radiation Interactions as Relevant to Climate Parameterization of Cloud-Radiation Interactions as Relevant to Climate Models: A New Dimension Stephens, G.L.(a), Wood, N.B.(a), Barker, H.W.(b), and Gabriel,P.(a), Colorado State University (a), Meteorological Service of Canada (b) Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting The parameterization of cloud-radiation interactions involve a number of levels of approximation. The focus of past programs like ICRCCM and I3RC have been directed largely towards assessing methods of solution while other efforts have gone into evaluating the parameterization of cloud optical properties. The parameterization of unresolved cloud variability, however, has received much less attention. A study that attempts to assess a number of the current empirical sub-grid parameterization methods has

434

ARM - Publications: Science Team Meeting Documents  

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Stratus Microphysical Parameters Using Radar and Visible Stratus Microphysical Parameters Using Radar and Visible Optical Depth Austin, R.T. and Stephens, G.L., Colorado State University, Fort Collins Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting A new algorithm for the retrieval of stratus cloud microphysical parameters was introduced last year and applied to measurements of maritime stratus clouds off the coast of California. The retrieval has been refined and applied to data from the Southern Great Plains CART site, as well as to the original California marine measurements. The poster will describe these refined results, discuss error analysis of the algorithm, show how the retrieval compares with analogous radar-only retrievals, and discuss other products and benefits of the algorithm's estimation theory formulation

435

ARM - Publications: Science Team Meeting Documents  

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Retrievals of Vertical Profiles of Cloud Ice Mass and Particle Retrievals of Vertical Profiles of Cloud Ice Mass and Particle Characteristic Size from MMCR Data Matrosov, S.Y.(a), Heymsfield, A.J.(b), Shupe, M.D.(c), and Korolev, A.V.(d), CIRES, University of Colorado and NOAA ETL (a), NCAR (b), STC (c), Canadian Atmospheric Service (d) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting A remote sensing method is proposed for the retrievals of vertical profiles of ice cloud microphysical parameters from ground-based measurements of radar reflectivity and Doppler velocity with a vertically pointed cloud radar. This method relates time-averaged Doppler velocities (which are used as a proxy for the reflectivity weighted particle fall velocities) to particle characteristic sizes such as median or mean. With estimated

436

ARM - Publications: Science Team Meeting Documents  

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Spectral Characterization of the Scattering and Absorption of Solar Spectral Characterization of the Scattering and Absorption of Solar Radiation by Aerosols and Clouds: Results from Several Recent Field Studies Pilewskie, P.(a), Rabbette, M.(b), Bergstrom, R.(b), Pommier, J.(b), and Howard, S.(b), NASA Ames Research Center (a), Bay Area Environmental Research Institute (b) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting Efforts to reduce the uncertainty in climate forcing due to the radiative effects of aerosols and clouds have led to the improvement of radiometric sensors used to measure the spectral distribution of solar radiation in the atmosphere. Because much of our current understanding of the solar radiation budget is derived from broadband (spectrally integrated) observations, newer spectrally resolved observations need to be examined in

437

ARM - Publications: Science Team Meeting Documents  

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Photoacoustic Instrument for Measurement of Aerosol or Gaseous Light Photoacoustic Instrument for Measurement of Aerosol or Gaseous Light Absorption Arnott, W.P., Moosmuller, H., and Rogers, C.F., Desert Research Institute Ninth Atmospheric Radiation Measurement (ARM) Science Team Meeting A photoacoustic instrument has been developed and evaluated for measurement of aerosol light absorption. This instrument produces a direct measure of absorption by use of a calibrated microphone and determination of laser power, in contrast to filter methods that require empirical calibration and are subject to strong effects of aerosol extinction. The instrument was evaluated during the winter of 1996-97 in Brighton, Colorado, during the North Front Range Air Quality Study (NFRAQS). Results of the instrument intercomparison with other methods during NFRAQS will be given along with

438

ARM - Publications: Science Team Meeting Documents  

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The Clear-Sky Diffuse 'Problem' at SGP: RSS Data & Analysis The Clear-Sky Diffuse 'Problem' at SGP: RSS Data & Analysis Harrison, L., Kiedron, P., and Min, Q., State University of new York, Albany Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting We analyze the spectral RSS data from the fall of 1999, when there were an unusual series of clear-sky cloud-free days at SGP. The RSS makes measurements of the spectral diffuse/direct ratio which are independent of calibration. We also extract typical optical depth analyis data from Langley regressions, and we retrieve column NO2 from correlation spectroscopy. We show that column NO2 is often well above clean-climatological background at SGP, and that this interacts with simple forms of aerosol-optical depth retrievals (which do not account for this)

439

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A New Approach for Obtaining Advection Profiles: Application to the SHEBA A New Approach for Obtaining Advection Profiles: Application to the SHEBA Column Morrison, H.(a) and Pinto, J.O.(b), University of Colorado (a), NCAR/University of Colorado (b) Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting Time-averaged vertically-integrated 3-D advections are inferred from heat and moisture budgets obtained from observations at SHEBA for April, May, June and July. Advection was a source of heat and moisture in the column budgets during the time period, balanced mostly by precipitation and radiative cooling. These inferred advections are used to evaluate and correct the 3D temperature and water vapor advection profiles obtained from operational forecasts of the ECMWF model. Advections from the ECMWF model are generally too warm and moist, particularly in July. These biases lead

440

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Long-Period Variations of UV-B Radiation From Results of Ozone Long-Period Variations of UV-B Radiation From Results of Ozone Reconstruction from Dendrochronologic Data Zuev, V.V. and Bondarenko, S.L., Institute of Atmospheric Optics Russian Academy of Sciences Tomsk, Russia Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting The thickness of stratospheric ozone layer modulates the level of UV-B radiation reaching the surface without cloudiness. The high level of UV-B radiation causes a stress of vegetation including trees. The stress-induced changes in physiologic processes are reflected in tree ring characteristics. The multi-centennial history of ozonosphere behavior is contained in annual tree rings on the basis of response to UV-B radiation effect. The dendrochronologic time series are statistically representative,

Note: This page contains sample records for the topic "facility documents arm" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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441

ARM - Publications: Science Team Meeting Documents  

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Evaluating Stochastic Radiative Transfer Evaluating Stochastic Radiative Transfer Lane, D.E. (a), Somerville, R.C.J. (b), and Iacobellis, S.F. (b), CIRES, University of Colorado, Boulder (a), Scripps Institution of Oceanography, University of California, San Diego (b) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting Stochastic modeling is a promising technique for representing shortwave radiative transfer through scattered, low-level clouds. A distinct advantage of this approach is that a stochastic model can accurately calculate the radiative heating rates through a broken cloud layer without requiring an exact description of the cloud geometry. In this paper a single-column model is employed to quantify the influence of the stochastic approach on model thermodynamics for times when broken cloud fields were

442

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Estimation of Temperature Effect of Fires Near Moscow in Summer-Fall 2002 Estimation of Temperature Effect of Fires Near Moscow in Summer-Fall 2002 Mokhov, I.I. and Gorchakova, I.A., Obukhov Institute of Atmosphere Physics RAS, Russia Fourteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting Local effect of cooling ΔT due to peatbog and forest fires near Moscow in summer-fall 2002 is estimated. These estimates are based on coordinated measurements at the Zvenigorod Scientific Station (55°42'N, 36°46'E) of our Institute. Continuous measurements of radiation balance components at the surface together with meteorological and aerological observations and determination of the aerosol optical depth τ were used to calculate the aerosol radiative forcing (ARF) at the surface ARF(0), at the top of the atmosphere ARF(∞), and for the whole atmosphere ARF (∞)- ARF(0).

443

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Numerical Tests of the Cloud-Surface Interaction Based Broken-Cloud Field Numerical Tests of the Cloud-Surface Interaction Based Broken-Cloud Field Optical Depth Retrieval: Sensitivity to Surface Albedo, Droplet Phase Function, Aerosol, and Instrument Noise Beaulne, A.(a), Barker, H.W.(b), Blanchet, J.P.(a), Pavloski, C.F.(c), Clothiaux, E.E.(c), and Marshak, A.(d), Universite du Quebec a Montreal (a), Environment Canada (b), The Pennsylvania State University (c), NASA-GSFC (d) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting The algorithm proposed by Barker and Marshak for inferring optical depth of broken clouds using surface radiometric data has been subject to several sensitivity tests. These include the impacts of uncertainties in specification of effective local surface albedo, droplet phase function,

444

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Seasonal Variability in Cloud Cover, Cloud Base Height, and Cloud Liquid Seasonal Variability in Cloud Cover, Cloud Base Height, and Cloud Liquid Water Content at the North Slope of Alaska and the Adjacent Arctic Ocean Takara, E.E. and Ellingson, R.G., University of Maryland Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting It is well known that complete radiative transfer calculations for broken cloud fields are extremely complex and time consuming. Furthermore, the solution for a particular broken cloud field is not particularly useful for evaluating cloud effects. For that reason, is common to parameterize the cloud effects by using an effective cloud fraction. In general circulation models, it is common to use theabsolute cloud amount as the effective cloud fractions. This can be an effective for cloud fields where the cloud

445

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Evidence for Aerosol Effects on AERI Clear-Sky Radiance at the SGP Evidence for Aerosol Effects on AERI Clear-Sky Radiance at the SGP Ma, Y., and Ellingson, R.G., University of Maryland Ninth Atmospheric Radiation Measurement (ARM) Science Team Meeting The Atmospheric Emitted Radiance Interferometer (AERI) Line-by-Line Radiative Transfer Model (LBLRTM) Quality Measurement Experiment (QME) 10-micron window residuals have been examined relative to the Multifilter Rotating Shadowband Radiometer (MFRSR) 0.87-micron optical depth for clear-sky periods during 1997-98. The analysis shows an increasing aerosol influence on the downwelling radiance with aerosol optical depth for columnar water totals below about 3 cm. Above 3 cm, the residuals become negatively correlated with both aerosol optical depth and precipitable water. This change in the characteristics suggests that the current LBLRTM

446

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A New Water Vapor Continuum Model: MT_CKD_1.0 A New Water Vapor Continuum Model: MT_CKD_1.0 Mlawer, E.J.(a), Clough, S.A.(a), and Tobin, D.C.(b), Atmospheric and Environmental Research, Inc. (a) University of Wisconsin - Madison (b) Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting For the first time since its inception, a new formulation for the CKD approach to the water vapor continuum has been generated. This new version is designated MT_CKD_1.0. The original CKD formulation, derived in 1980 based upon laboratory measurements due to Burch and collaborators, applied an empirically derived multiplicative factor (different for the self and foreign continua) to the line wing of the impact line shape. This resulted in a line shape that was super-Lorentzian in the near and intermediate line

447

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Retrieval of Mean Cosine of Aerosol Phase Function from Extinction and Sky Retrieval of Mean Cosine of Aerosol Phase Function from Extinction and Sky Brightness Measurements Zhuravleva, T.B.(a), Sviridenkov, M.A.(b), and Anikin, P.P.(b), Institute of Atmospheric Optics SB RAS, Tomsk, Russia (a), A.M. Obukhov Institute of Atmospheric Physics RAS, Moscow, Russia (b) Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting Asymmetry of the aerosol phase function together with optical thickness drive the magnitude of the aerosol radiative forcing. Two approaches are usually used to obtain the mean cosine of the phase function retrieval of the single scattering phase function from sky brightness measurements or calculations for the given aerosol size distribution and refractive index. We studied the possibility to determine the mean cosine directly from

448

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3-D Reconstruction of a Regional-Scale Cloud Field from Satellite Data 3-D Reconstruction of a Regional-Scale Cloud Field from Satellite Data for Use in a Broadband Monte Carlo Radiative Transfer Model Galinsky, V., Ramanathan, V., Boer, E., Podgorny, I., and Vogelmann, A. M., Center for Atmospheric Sciences-Scripps Institution of Oceanography Eighth Atmospheric Radiation Measurement (ARM) Science Team Meeting The absence of realistic 3-D cloud fields and their associated radiative transfer in current general circulation models (GCM) or radiative transfer models may result in large inconsistencies in the Earth's energy budget calculations. We investigate these effects by reconstructing the regional-scale, 3-D cloud field structure from multi-spectral satellite imagery. From this reconstruction, we compute the radiative fluxes using a

449

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Using a MFRSR to Calculate Direct and Diffuse Broadband Measurements from Using a MFRSR to Calculate Direct and Diffuse Broadband Measurements from Global Broadband Measurements Cornwall, C.R. (a,b), Hodges, G.B. (a,b), and DeLuisi, J.D. (b), University of Colorado Cooperative Institute for Research in Environmental Sciences (a), NOAA Air Resources Lab (b) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting Research Objective: To infer values of direct solar irradiance using data from a Multi-Filter Rotating Shadowband Radiometer (MFRSR) and a broadband pyranometer measuring global horizontal irradiance. Methodology: The MFRSR measures global and diffuse radiation over six narrow spectral bands as well as one broadband (silicon pyranometer). Values for corresponding direct normal irradiances are automatically calculated as part of the MFRSR

450

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A Comparison of High Spectral Resolution Infrared Cloud Boundary Algorithms A Comparison of High Spectral Resolution Infrared Cloud Boundary Algorithms using S-HIS and AERI Measurements Holz, R.E.(a), Antonelli, P.(a), Ackerman, S.(a), McGill, M.J.(a), Nagel, F.(a), Feltz, W.F.(a), and Turner, D.D.(b), Univeristy of Wisconsin, Madison (a), Pacific Northwest National Laboratory (b) Fourteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting Cloud top pressure is an important parameter in determining the radiative impact of clouds on climate. In addition, atmospheric temperature and moister retrievals of cloudy scenes using high spectral resolution data require the cloud altitude be known. The S-HIS is scheduled to fly on the Proteus during the upcoming M-PACE experiment. In addition to the SHIS a lidar system and an imager will accompany the SHIS during MPACE. This paper

451

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Application of a Non-local Turbulence Closure Scheme to a Single Column Application of a Non-local Turbulence Closure Scheme to a Single Column Model Ghan, S.J. (a) and Moeng, C.-H. (b), Pacific Northwest National Laboratory (a), National Center for Atmospheric Research (b) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting A non-local countergradient transport term is added to a turbulence kinetic energy scheme embedded in a single column model (SCM). The countergradient term is expressed in terms of a planetary boundary layer (PBL) velocity scale, the vertical profile of diffusivity, the depth of the PBL, and the fluxes of heat and moisture at the surface and at the top of the PBL. The fluxes at the top of the PBL are expressed in terms of the cloud top radiative cooling rate, the jump in liquid potential temperature and total

452

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Analysis of Humidity Halos Around Trade Wind Cumulus Clouds Analysis of Humidity Halos Around Trade Wind Cumulus Clouds Lu, M.-L.(a), Wang, J.(b), Freedman, A.(c), Jonsson, H.H.(d), Flagan, R.C.(a), McClatchey, R.A.(c), and Seinfeld, J.H.(a), California Institute of Technology (a), Brookhaven National Laboratory (b), Aerodyne Research, Inc. (c), Naval Postgraduate School (d) Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting Regions of enhanced humidity in the vicinity of cumulus clouds, so-called cloud halos, reflect features of cloud evolution, exert radiative effects and may serve as a locus for new particle formation. We describe here the results of an aircraft sampling campaign carried out near Oahu, Hawaii from July 31- Aug. 10, 2001, aimed at characterizing the properties of trade wind cumulus cloud halos. An Aerodyne Research Inc. fast spectroscopic

453

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Radar Observations of Large-Eddy Circulations and Turbulence in Boundary Radar Observations of Large-Eddy Circulations and Turbulence in Boundary Layer Clouds Albrecht, B.A. and Kollias, P., Umiversity of Miami Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting With the development and application of Doppler short wavelength radars, there has been an increased capability for explicitly resolving the vertical structure of boundary layer cloud circulations. Further, Doppler mm-wavelength radars used in a vertically pointing mode can provide information on the turbulence structure within the cloud volume sampled by the radar. Since these radar large eddy observations (LEO) are of the same resolution as that of Large Eddy Simulation models, they provide a means for explicitly evaluating LES (LEO for LES). Further the radar observations

454

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Full Spectrum Correlated-k for Shortwave Atmospheric Radiative Transfer Full Spectrum Correlated-k for Shortwave Atmospheric Radiative Transfer Pawlak, D.T.(a,b), Clothiaux, E.E.(a), Modest, M.M.(c), and Cole, J.N.S.(a), Department of Meteorology, The Pennsylvania State University (a), Air Force Institute of Technology, Civilian Institutions Graduate Programs Division (b), Department of Mechanical Engineering, The Pennsylvania State University (c) Fourteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting Fast and accurate atmospheric radiation heating and cooling rate calculations are important for improving global climate and numerical weather prediction model performance. The radiative transfer calculations in atmospheric models must be fast so that the underlying methods can actually be implemented in the models and the calculations must be accurate

455

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The Absorption of NIR Solar Radiation by Precipitation The Absorption of NIR Solar Radiation by Precipitation Evans, W.F.J.(a) and Puckrin, E.(b), Physics Department, Trent University (a), DRDC,Canada (b) Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting It has recently been shown by Ackerman (Physics Today; 2003) that good radiation codes can model the absorption of up to 100 W/m2 of short wave by clouds. However, spectral measurements of the transmission of solar infrared radiation through clear and cloudy skies with FTIR spectroscopy have indicated that still are certain clouds which absorb unexpectedly large amounts of near-infrared (NIR) radiation. The amounts are unexpected in the sense that radiation codes, including sophisticated algorithms such as MODTRAN4, do not model this strong NIR absorption effect. The absorption

456

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Aerosol Enhancement of Cloud Albedo Shown by Satellite Measurements and Aerosol Enhancement of Cloud Albedo Shown by Satellite Measurements and Chemical Transport Modeling Schwartz, S.E. (a), Harshvardhan (b), and Benkovitz C.M.(a), Brookhaven National Laboratory (a), Purdue University (b) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting The Twomey effect of enhanced cloud droplet concentration, optical depth, and albedo due to anthropogenic aerosols is thought to contribute substantially to radiative forcing of climate change over the industrial period. Present model-based estimates of this indirect forcing are highly uncertain. Increased cloud drop concentration and decreased effective radius indicative of the indirect effect have previously been shown in interhemispheric comparisons of satellite remote sensing data, but efforts

457

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The Darwin 2005 IOP The Darwin 2005 IOP May, P.T.(a), Jakob,C.(a), Long, C.N.(b), and Keenan, T.D.(a), Bureau of Meteorology Research Centre (a), Pacific Northwest National Laboratory (b) Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting A major field project is planned for Darwin in January to February 2005. Amongst its aims are the study of the structure and evolution of cirrus in monsoonal convection and how it differs from coastal and island storm generated cirrus, providing a data set suitable for CRM and SCM single column modeling efforts and validation of ground based remote sensors. Northern Australia experiences three distinct cloud regimes, a pronounced dry season, a transition season dominated by deep coastal convection and continental squall lines and a monsoon where the convection has a

458

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A Climatology of Cloud & Radiative Properties Derived from GMS-5 Data Over A Climatology of Cloud & Radiative Properties Derived from GMS-5 Data Over the Tropical Western Pacific Nordeen, M.L.(a), Doelling, D.R.(a), Khaiyer, M.M.(a), Rapp, A.D.(a), and Minnis, P.(b), Analytical Services & Materials, Inc. (a), National Aeronautics and Space Administration-Langley Research Center (b) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting Satellite derived cloud and radiative properties can provide continuous spatial and temporal coverage over the Tropical Western Pacific (TWP). The TWP is an area with few meteorological stations, but is an interesting region in global climate studies. Starting with the Nauru99 Intensive Operational Period (IOP) (June-July 1999), two years of hourly Geostationary Meteorological Satellite (GSM-5) images are used in the

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Resolving Models as Scaffolding for Cloud Parameterizations in Resolving Models as Scaffolding for Cloud Parameterizations in Large-Scale Models Pincus, R.(a), Klein, S.A.(b), Hannay, C.(a), and Xu, K.-M.(c), NOAA-CIRES Climate Diagnostics Center (a), NOAA Geophysical Fluid Dynamics Laboratory (b), NASA Langley Research Center (c) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting The treatment of clouds in large scale models has evolved from fixed to diagnostics to predictive as the importance of cloud feedbacks has become clear. In development now are schemes which account for the resolution-dependent sub-grid scale variability in condensate, which is thought to be a significant factor driving ad hoc model tuning. Parameterizations have their roots in theory, experiment, and observational data. It's very hard, though, to observe the four-dimensional structure of

460

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A Continuous Initial Estimate of Cloud Microphysical Structure Using A Continuous Initial Estimate of Cloud Microphysical Structure Using Surface-Based Remote Sensors and Parameterized Microphysics Miller, M.A. and Johnson, K.L., Brookhaven National Laboratory Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting Realistic heating rate profiles require an accurate and continuous accounting of cloud microphysical structure. To date, several highly constrained microphysical retrieval algorithms have been designed that operate on specific cloud systems. These algorithms are sufficiently specialized that they are generally applicable in a relatively narrow range of conditions. When these conditions are satisfied, heating profiles can be computed. While it may be possible to link several of these specialized algorithms to produce a semi-continuous description of cloud microphysical

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Effective Diameter in Radiation Transfer: Definition, Applications and Effective Diameter in Radiation Transfer: Definition, Applications and Limitations Mitchell, D. L., Desert Research Institute Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting Although the use of an effective radius for radiation transfer calculations in water clouds has been common for many years, the export of this concept to ice clouds has been fraught with uncertainty. A consensus appears to be building that a general definition of effective diameter, Deff, should involve the ratio of the size distribution (SD) volume (at bulk density) to projected area. This work further endorses this concept, describes its physical basis in terms of an effective photon path, and demonstrates the equivalency of a derived Deff definition for both water and ice clouds.

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6 Science Team Meeting 6 Science Team Meeting 1996 Proceedings Proceedings Sorted by Title Proceedings Sorted by Author Science Team Meeting Proceedings Proceedings of the Sixth Atmospheric Radiation Measurement (ARM) Science Team Meeting DOE CONF-9603149, March 1996 San Antonio, Texas For proper viewing, many of these proceedings should be viewed with Adobe Acrobat Reader. Download the latest version from the Adobe Reader website. View session papers by Author or Title. Poster abstracts are not available online for this year. However, if you would like to request a copy of a specific poster abstract, please contact the Web Administrator. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z A Ackerman, T.P. A Comparison Between Clear Sky Shortwave Flux Calculations and Observations During ARESE

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Mean 3D Radiative Transfer in Cloudy Columns: Further Empirical Evidence Mean 3D Radiative Transfer in Cloudy Columns: Further Empirical Evidence for Propagation Kernels with Power-Law Tails Davis, A.B. (a), Marshak, A. (b), and Barker, H.W. (c), Los Alamos National Laboratory (a), NASA Goddard Space Flight Center (b), Meteorological Service of Canada (c) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting For reasons of computational efficiency, current radiation parameterizations in GCMs are uniformly based on analytical 2-stream solutions of the 1D integro-differential radiative transfer equation (RTE). This is true even when there is an effort to account for subgrid variability which would normally call for the full 3D RTE. Indeed, state-of-the-art GCM radiation schemes use linear combinations of clear-

464

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An Anthology of Tropical Convection: Dynamical and Thermodynamical An Anthology of Tropical Convection: Dynamical and Thermodynamical Interactions and the Organization of Large-Scale Tropical Convection Webster, P.J., Program in Atmospheric and Oceanic Sciences, University of Colorado Ninth Atmospheric Radiation Measurement (ARM) Science Team Meeting There appears to be no universal relationship between large-scale organized convection and the magnitude of sea surface temperature (SST). Convection and mean precipitation maxima are often found on the equatorward side of maximum SST or even in the winter hemisphere of the tropics. Thus, there must exist other rules besides thermodynamical forcing that provide necessary conditions for convection. A survey of large-scale organized convection has been conducted in order to find necessary conditions for the

465

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Combination of the Separation of Variable and the T-matrix Method for Combination of the Separation of Variable and the T-matrix Method for Computing Optical Properties of Spheroidal Particles Schulz, F.M., Eide, H.A., and Stamnes, K., University of Alaska, Fairbanks; Stamnes, J.J., University of Bergen, Norway Eighth Atmospheric Radiation Measurement (ARM) Science Team Meeting The growing interest in nonspherical particles in recent years has led to significant improvements of various light scattering models for different kinds of nonspherical particles. One approach is to model size-shape distributions of randomly oriented particles by spheroids, whose light scattering properties can be rigorously calculated with the separation of variable method (SVM). The SVM can be used to model particles with spheroidal shapes departing significantly from sphericity. In contrast, the

466

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Empirical Model of Aerosol Uplifting from the Arid Area Empirical Model of Aerosol Uplifting from the Arid Area Gorchakov, G.I., Shukurov, K.A., and Golitsyn, G.S., A.M. Obukhov Institute of Atmospheric Physics, RAS Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting The model enables to make the estimates of the vertical fluxes of arid aerosol using measured data of the wind velocity. The model includes the following main elements: 1. The parameterization of the microstructure of the aerosol uplifted from the area. 2. Relationship between wind velocity and the submicron aerosol concentration. 3. The aerosol uplifting rates. It is found that there is the synchronism of the submicron and coarse aerosol fluctuation in convective conditions at the arid area. Vertical turbulent fluxes of the aerosol were determined regarding two regimes of aerosol

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Variations in the Ratio of IR Window Radiance to Microwave Water Path Variations in the Ratio of IR Window Radiance to Microwave Water Path Observed Under Cloudless Convection Platt, C.M.(a) and Austin, R.T.(b), Department of Atmospheric Science, Colorado State University, Fort Collins, Colorado Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting The measurement of the radiance of cirrus (and other) clouds at atmospheric window 8-13 micron wavelengths requires a correction for the water vapor radiance and transmittance below the clouds. Calculating radiances at the times of routine radiosonde ascents and interpolating the radiance/water path ratio between ascents can achieve this. However it has been observed experimentally that IR radiance/water path ratios appear to vary between radiosonde ascents away from the interpolated values. This occurs

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Influence of Smoke over Haze on Heating Rate and Radiative Forcing: Influence of Smoke over Haze on Heating Rate and Radiative Forcing: Consistency of Measurements from Aircraft, Ground and Satellite Vant-Hull, B., Taubman, B.F., and Li, Z., Department of Meteorology, University of Maryland, College Park Fourteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting On 8 July 2002, heavy and widespread smoke advected from fires in Quebec to the eastern seaboard of the US, rending an interesting aerosol scenario with strong absorbing aerosols (smoke) overlying scattering aerosols (industrial pollution). An aircraft equipped with a variety of aerosol and chemical sensors flew over five locations in Virginia and Maryland. This study evaluates the consistency of aerosol measurements made by a suite of air-borne, space-borne and ground-based instruments and evaluates the

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A New Approach for Computing Single Scattering Properties of Ice Clouds A New Approach for Computing Single Scattering Properties of Ice Clouds Using a Size-Shape Distribution of Spheroidal Particles Eide, H.A., and Stamnes, K., University of Alaska, Fairbanks; Stamnes, J.J., University of Bergen, Norway; Schulz, F.M., University of Rochester Ninth Atmospheric Radiation Measurement (ARM) Science Team Meeting Clouds are of paramount importance for the global energy balance and hence for our climate. In global circulation models (GCMs), designed to predict future climate, the effects of clouds are commonly based on the scattering and absorption properties of spherical particles. At high latitudes as well as at high enough altitudes anywhere on our planet, clouds frequently consist of ice particles that are far from spherical in shape. Ice

470

ARM - Publications: Science Team Meeting Documents  

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Spurious Oscillation in Simulating Boundary-Layer Cumulus Clouds with Spurious Oscillation in Simulating Boundary-Layer Cumulus Clouds with Third-Order Turbulence Closure Models Fischer, M.L.(a), Billesbach, D.P.(b), Riley, W.J.(a), Berry, J.A.(c), and Torn, M.S.(a), E.O. Lawrence Berkeley National Laboratory (a), University of Nebraska (b), Carnegie Institution of Washington (c) Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting Spatial heterogeneity in the mass and energy fluxes in the Southern Great Plains are controlled by a combination of driving variables (e.g. climate, topography and soil, vegetation, and land use and management). Accurate estimation of landscape-averaged ecosystem-atmosphere exchange hence suggests the need for predictive models tested with extensive ground based measurements and/or a measurement method with regional coverage. This is

471

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Scale Analysis of Spatial and Temporal Variability of Aerosol Optical Scale Analysis of Spatial and Temporal Variability of Aerosol Optical Properties Over the SGP Site based on MFRSR and MODIS Data Alexandrov, M.D.(a,b), Marshak, A.(b), Cairns, B.(a,b), Lacis, A.A.(b), and Carlson, B.E.(b), Columbia University (a), NASA (b) Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting We present scale-by-scale analysis of variability of atmospheric aerosol optical thickness (AOT) and (preliminary) of the Angstrom exponent. This analysis is based on retrievals from Multi-Filter Rotating Shadowband Radiometers (MFRSRs) and from Moderate Resolution Imaging Spectroradiometer (MODIS) satellite data. This type of analysis has been applied to a remote sensing aerosol dataset for the first time. The MFRSR data were collected

472

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Using Time-Height Cross-Sections of Cumulus Cloud Fields for Solar Using Time-Height Cross-Sections of Cumulus Cloud Fields for Solar Radiative Transfer Pincus, R.(a), Hannay, C.(a), and Evans, K.F.(b), NOAA-CIRES Climate Diagnostics Center (a), University of Colorado (b) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting How much must be known about a cloud field in order to accurately compute the reflected and transmitted flux? Given our limited abilities to measure the time-evolving three-dimensional structure of clous, and the high cost of making three-dimensional (3D) radiative transfer computations, we would like to determine the accuracy of various approximations used to convert remote sensing observations to domain averaged solar fluxes. We use highly resolved (50 m, 1 min) clouds fields from large eddy simulations of

473

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A Partially Prognostic Third-Order Closure Model for Modeling the Boundary A Partially Prognostic Third-Order Closure Model for Modeling the Boundary Layer Cheng, A.C.(a) and Xu, K.-M.(b), Center for Atmospheric Sciences, Hampton University (a), Atmospheric Sciences, NASA Langley Research Center (b) Fourteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting A new partially prognostic third-order closure (TOC) model is developed to model boundary-layer clouds in this study. The model assumes joint double Gaussian distributions of vertical velocity, temperature and moisture. The first and second moments of all variables as well as the third moments of vertical velocity, liquid-water potential temperature and total water mixing ratio are predicted to determine a proper probability density function (PDF). Once the PDF is known, the rest of the third moments and

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New Concepts for Improved Performance of Dynamical and Microphysical New Concepts for Improved Performance of Dynamical and Microphysical Parameterization of Clouds Sud, Y.C.(a) and Walker, G.K.(b), NASA/Laboratory for Atmospheres Goddard Space Flight Center Three new concepts were launched for: i) simulating more shallow convection, ii) capturing mid-level convection and iii) better simulating the boundary-layer convection forced boundary-layer clouds. Each process was prameterized and evaluated in the ARM-CART SCM environment. The individual and combined influence of these on the simulated boundary-layer, shallow cumulus, mid-level cloudiness were examined. In addition, a physically based vertical adjustment of the advective air-mass transport was parameterized to better capture the isentropic character of horizontal advection. This modification eliminated the near surface temperature biases

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Sun Photometer Laser and Lamp Based Radiometric Calibrations Sun Photometer Laser and Lamp Based Radiometric Calibrations Allen, D.W.(a), Souaidia, N.(a), Pietras, C.(b), Brown, S.(a), Lykke, R.(a), Frouin, R.(c), Deschamps, P.Y.(d), Fargion, G.(b), and Johnson, B.C.(a), National Institute of Standards and Technology (a), National Aeronautics and Space Administration, SAIC (b), Scripps Institution of Oceanography (c), Laboratoire d'Optique Atmospherique, France (d) Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting The goals of this study were to calibrate the radiometers using independent methods, evaluate the uncertainties for each method, and assess the influence of the results in terms of the science requirements. The radiometers were calibrated in irradiance and radiance mode using a monochromatic, laser-illuminated integrating sphere, in radiance mode using

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2 Science Team Meeting 2 Science Team Meeting 1992 Proceedings Proceedings Sorted by Title Proceedings Sorted by Author Science Team Meeting Proceedings Proceedings of the Second Atmospheric Radiation Measurement (ARM) Science Team Meeting DOE CONF-9110336, October 26-30, 1992 Denver, Colorado For proper viewing, many of these proceedings should be viewed with Adobe Acrobat Reader. Download the latest version from the Adobe Reader website. View session papers by Author or Title. * Poster abstract only; an extended abstract was not provided by the author(s). A B C D E F G H I J K L M N O P Q R S T U V W X Y Z A Ackerman, T. An Integrated Cloud Observation and Modeling Investigation in Support of the Atmospheric Radiation Measurement Program Tropical Western Pacific Project: Status Albrecht, B.

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Retrieval of Cirrus Particle Sizes Using a Spit-Window Technique: A Retrieval of Cirrus Particle Sizes Using a Spit-Window Technique: A Sensitivity Study Fu, Q. (a) and Sun, W.B. (b), University of Washington (a), Dalhousie University (b) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting The 8 - 12 um atmospheric window is an important spectral region for the remote sensing of the earth-atmosphere system. Since clouds are the major regulator of the global radiative energy budget, numerous methods have been developed to detect clouds and cloud properties based on satellite observations. Among them are the split-window techniques which are particularly useful for remote sensing of cirrus clouds. Owing to the large spectral variation of ice's imaginary refractive index over the atmospheric window, one can infer the effective ice particle sizes of cirrus clouds

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ARM - Publications: Science Team Meeting Documents  

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Passive Remote Sensing of Aerosol Properties from Aircraft Measurements Passive Remote Sensing of Aerosol Properties from Aircraft Measurements Over the SGP Cairns, B. (a), Lacis, A.A. (b), Carlson, B.E. (b), Alexandrov, A. (a), and Barnard, J.C. (c), Columbia University (a), NASA Goddard Institute for Space Studies (b), Pacific Northwest National Laboratory (c) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting The principal difficulties in retrieving aerosol loadings and microphysical properties using passive remote sensing measurements over land surfaces are the significant spectral and spatial variations in the observed intensities that are caused by the land surface. The may also be of use in remote sensing of the surface, being indicative of its roughness, or in the case of vegetation its leaf inclination distribution. It is believed that the

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ARM - Publications: Science Team Meeting Documents  

NLE Websites -- All DOE Office Websites (Extended Search)

Intial Results from an Automated High Spectral Resolution Lidar Intial Results from an Automated High Spectral Resolution Lidar Eloranta, E.W., University of Wisconsin-Madison Fourteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting An automated High Spectral Resolution Lidar constructed at the University of Wisconsin is nearly ready for an Arctic deployment. It is designed for remote operation as an Internet appliance requiring only minimal onsite attention. The system is currently installed in our roof top laboratory and is operating continuously as part of an extended shakedown test. Several months of data have been collected and archived on our web site (see arctic HSRL at "lidar.ssec.wisc.edu"). A web interface to browse and visualize data is provided along with tools to generate calibrated plots of

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ARM - Publications: Science Team Meeting Documents  

NLE Websites -- All DOE Office Websites (Extended Search)

The Use of Performance Metrics to Enhance Meteorological Operations The Use of Performance Metrics to Enhance Meteorological Operations Jakob, C.(a), Pincus, R.(b), Hannay, C.(b), and Xu, K.-M.(c), BMRC (a), NOAA/CIRES CDC (b), NASA Langley (c) Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting It is highly desirable to use cloud radar data in the evaluation of model simulations of clouds at various scales. Unfortunately there is an inherent mismatch between the spatial and temporal scales of the models and the observations. Usually this mismatch is overcome by time-averaging the observations and declaring the averages as representative for a given model spatial scale. Here we explore an alternative method of model evaluation that is based on the interpretation of model cloud predictions as probabilistic forecasts at the observation point. First we contrast

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ARM - Publications: Science Team Meeting Documents  

NLE Websites -- All DOE Office Websites (Extended Search)

Narrowband, Narrow Field-of-View Fast Infrared Filter Radiometry: Future Narrowband, Narrow Field-of-View Fast Infrared Filter Radiometry: Future Operation at CART Sites and Some Aspects of Water Vapor Absorption and Emission Platt, C.M.R. (a), Bennett, J.A. (b), Petraitis, B. (b), Austin, R.T. (a), and Young, S.A. (b), Colorado State University, Fort Collins (a), CSIRO Atmospheric Research, Aspendale, Australia (b) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting An infrared filter radiometer is being installed at the SGP CART site early in 2001. The radiometer is based on a previous Mark I version that was used successfully in field experiments in tropical Australia. The radiometer has a narrow field-of-view, compatible with lidar, is fast, at one-second-time constant, and has three channels at 8.62, 10.86 and 12.12 microns. It

482

ARM - Publications: Science Team Meeting Documents  

NLE Websites -- All DOE Office Websites (Extended Search)

The North Slope of Alaska CART and Arctic Change 2002 The North Slope of Alaska CART and Arctic Change 2002 Zak, B.D., Zirzow, J.A., and Einfeld, W., Sandia National Laboratories Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting The North Slope of Alaska/Adjacent Arctic Ocean (NSA/AAO) Cloud and Radiation Testbed (CART), operational since spring of 1998, is maturing just in time for the push to understand the far-reaching changes in the Arctic presently occurring. From the mid 1970s to the mid 1990s, arctic sea ice areal coverage has decreased about 5%, but ice thickness appears to have decreased about 40%. In addition, temperature and salinity patterns in the Arctic Ocean and the associated thermohaline circulation have been affected, as have many other climate-related processes. An Arctic

483

ARM - Publications: Science Team Meeting Documents  

NLE Websites -- All DOE Office Websites (Extended Search)

Comparison of Measurements of Liquid Water Path Comparison of Measurements of Liquid Water Path Lane, D.E. (a), Fairall, C.W. (b), Hazen, D. (b), and Orr, B. (b), Cooperative Institute for Research in Environmental Science, University of Colorado, Boulder (a), Environmental Technology Laboratory, National Oceanic and Atmospheric Administration, Boulder (b) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting Investigation of ship-based microwave radiometer observations from the equatorial Pacific during EPIC 99 indicated anomalously high values of liquid water content during clear sky conditions. Several possible sources of error were examined including the radiative transfer model employed to the original sondings, and application of the TIP calibrations. Further research has suggested that incorrect brightness temperatures were observed

484

ARM - Publications: Science Team Meeting Documents  

NLE Websites -- All DOE Office Websites (Extended Search)

Introducing WEB_MADS Introducing WEB_MADS Dedecker, R.G., Quinn, G.M., Garcia, R.K., and Revercomb, H.E., University of Wisconsin-Madison Space Science and Engineering Center Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting The Multiple AERI Display System (MADS) is a software package developed to allow remote access to and viewing of the operational AERI data streams produced by remotely operated AERI instruments. The MADS system was developed some years ago and operates on stand alone Personal Computers that run the OS/2 operating system and that acquire remote AERI data via the Internet. WEB-MADS is a Web based prototype version of MADS that allows remote access to the same AERI data and information using any standard Web Browser. As was the case with the original MADS, WEB-MADS provides a means for real

485

ARM - Publications: Science Team Meeting Documents  

NLE Websites -- All DOE Office Websites (Extended Search)

The Impact of a Revised Treatment of Cirrus Microphysics on the Radiation The Impact of a Revised Treatment of Cirrus Microphysics on the Radiation Budget of the Unified Model Edwards, J.M. (a), Mitchell, D.L. (b), Ivanova, D. (b), and Wilson, D.R. (a), Met Office, Hadley Centre for Climate Prediction and Research (a), Desert Research Institute (b) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting The Unified Model is used for both NWP and climate simulations at the Met Office. A parametrization of ice crystals as planar polycrystals was recently introduced into the climate and mesoscale NWP versions of this model, resulting in improvements to the radiation budget and a reduction in the upper tropospheric cold bias. Based on field observations, the size distribution is taken as bimodal and is characterized by a mean maximum

486

ARM - Publications: Science Team Meeting Documents  

NLE Websites -- All DOE Office Websites (Extended Search)

4 Science Team Meeting 4 Science Team Meeting 1994 Proceedings Proceedings Sorted by Title Proceedings Sorted by Author Science Team Meeting Proceedings Proceedings of the Fourth Atmospheric Radiation Measurement (ARM) Science Team Meeting DOE CONF-940277, March 1994 Charleston, South Carolina For proper viewing, many of these proceedings should be viewed with Adobe Acrobat Reader. Download the latest version from the Adobe Reader website. View session papers by Author or Title. * Poster abstract only; an extended abstract was not provided by the author(s). A B C D E F G H I J K L M N O P Q R S T U V W X Y Z A Abreu, L.W. MODTRAN3: Suitability as a Flux-Divergence Code Acharya, P. MODTRAN3: Suitability as a Flux-Divergence Code Ackerman, S.A. Atmospheric Emitted Radiance Interferometer Data Analysis Methods

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ARM - Publications: Science Team Meeting Documents  

NLE Websites -- All DOE Office Websites (Extended Search)

Uncertainties in the Line Intensities in the 1130 nm Band of Water Vapor Uncertainties in the Line Intensities in the 1130 nm Band of Water Vapor Giver, L.P. (a), Pilewskie, P. (a), Gore, W.J. (a), Chackerian, Jr., C. (b), Varanasi, P. (c), Freedman, R.S. (d), and Bergstrom, R. (e), NASA-Ames Research Center (a), SETI Institute (b), State University of New York at Stony Brook (c), Space Physics Research Institute (d), Bay Area Environmental Research Insitute (e) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting Belmiloud et al (GRL 27, 3703-3706 (2000)) have recently asserted that the line intensities in the 1130 nm band of water vapor band listed in the HITRAN database are much too weak. Giver et al (JQSRT 66, 101-105(2000)) pointed unit-conversion errors out in the intensity data previously appearing in the HITRAN database and corrected the intensity data so that

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ARM - Publications: Science Team Meeting Documents  

NLE Websites -- All DOE Office Websites (Extended Search)

Evaluation of Remote Sensing of the Single Scattering Albedo of Aerosols Evaluation of Remote Sensing of the Single Scattering Albedo of Aerosols During the Aerosol IOP Cairns, B.(a), Gianelli, S.M.(a), Carlson, B.E.(b), and Lacis, A.A.(b), Columbia University (a), NASA GISS (b) Fourteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting It has long been known that diffuse sky radiance and irradiance measurements are sensitive to the single scattering albedo of aerosols. The main difficulties in exploiting this sensitivity to try and remotely estimate the single scattering albedo of aerosols are uncertainties in the albedo and bidirectional reflectance distribution function of the surface and uncertainties in the calibration of the instruments used to make the measurements. The surface albedo measurements that are currently being

489

ARM - Publications: Science Team Meeting Documents  

NLE Websites -- All DOE Office Websites (Extended Search)

Evaluation of a Bulk Cloud Microphysics Model in Simulating Low-Level Evaluation of a Bulk Cloud Microphysics Model in Simulating Low-Level Arctic Mixed-Phase Clouds Using a New Single-Column Model Morison, H., Curry, J.A., and Mirocha, J., University of Colorado Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting The MM5 NCAR/Penn State mixed-phase bulk microphysical parameterization is evaluated using a new single column model (ARCSCM) in the context of arctic low-level mixed-phase clouds. ARCSCM is developed from the Arctic Regional Climate System Model (ARCSyM). Three mixed-phase clouds over SHEBA in May 1998 are simulated using the MM5 parameterization. Liquid water path (LWP) is underpredicted by ~ 75% compared to observations for the two cases that have a significant ice content, while LWP is accurately predicted (within

490

ARM - Publications: Science Team Meeting Documents  

NLE Websites -- All DOE Office Websites (Extended Search)

2 Science Team Meeting 2 Science Team Meeting 1992 Proceedings Proceedings Sorted by Title Proceedings Sorted by Author Science Team Meeting Proceedings Proceedings of the Second Atmospheric Radiation Measurement (ARM) Science Team Meeting DOE CONF-9110336, October 26-30, 1992 Denver, Colorado For proper viewing, many of these proceedings should be viewed with Adobe Acrobat Reader. Download the latest version from the Adobe Reader website. View session papers by Author or Title. Technical Sessions A Field Evaluation of NOAA Remote Sensor Measurements of Wind, Temperature, and Moisture B.E. Martner A Stochastic Formulation of Radiant Transfer in Clouds and Radiative Properties of Non-Uniform Clouds G.L. Stephens and P.D. Gabriel A Study of Longwave Radiation Codes for Climate Studies: Validation

491

ARM - Publications: Science Team Meeting Documents  

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Case Studies of Water Vapor Variability During the International H20 Case Studies of Water Vapor Variability During the International H20 Project 2002 Using GPS Braun, J., Rocken, C., and Kuo, Y.H., UCAR/COSMIC Fourteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting The International H20 Project 2002 (IHOP_2002) was a field experiment located in the United States Southern Great Plains whose primary objective was to improve warm season rainfall prediction through the collection of precise observations of the water cycle and their assimilation into numerical weather models. As part of a wide range of observing systems, more than 40 Global Positioning System (GPS) stations were operating in the experiment region during IHOP_2002. We present an analysis of the evolution of the water vapor field for significant storms that were captured by the

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