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Note: This page contains sample records for the topic "rain disdrometer disdrometer" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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1

ARM - Field Campaign - Rain Microphysics Study with Disdrometer and  

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

govCampaignsRain Microphysics Study with Disdrometer and Polarization govCampaignsRain Microphysics Study with Disdrometer and Polarization Radar Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Rain Microphysics Study with Disdrometer and Polarization Radar 2005.04.28 - 2005.06.30 Lead Scientist : Guifu Zhang For data sets, see below. Description Understanding rain microphysics is important for accurate rainfall rate estimation and for improving parameterization in numerical weather prediction (NWP). The NCAR video disdrometer was installed at the ARM site at the Kessler farm. The disdrometer was also put side-by-side with the NSSL disdrometer for comparison/calibration and to study sampling effects. The disdrometer observations were used to verify KOUN polarimeteric radar

2

ARM - Instrument - disdrometer  

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

govInstrumentsdisdrometer Documentation DISDROMETER : Handbook DISDROMETER : Instrument Mentor Monthly Summary (IMMS) reports DISDROMETER : Data Quality Assessment (DQA) reports...

3

Rain Gauge and Disdrometer Measurements during the Keys Area Microphysics Project (KAMP)  

Science Conference Proceedings (OSTI)

Four impact disdrometers and 27 tipping bucket rain gauges were operated at 11 different sites during August and September 2001, as part of the Keys Area Microphysics Project. The rain gauge and disdrometer network was designed to study the range ...

Ali Tokay; David B. Wolff; Katherine R. Wolff; Paul Bashor

2003-11-01T23:59:59.000Z

4

Comparison of Simulated Rain Rates from Disdrometer Data Employing Polarimetric Radar Algorithms  

Science Conference Proceedings (OSTI)

Disdrometer data collected during three spring days, with moderate to heavy rain in the Norman, Oklahoma region are used with various polarimetric radar algorithms to simulate rain rates. It is assumed that available measurables are 1) ...

N. Balakrishnan; Dúsan S. Zrni?; Julius Goldhirsh; John Rowland

1989-06-01T23:59:59.000Z

5

ARM - Datastreams - disdrometer  

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

Datastreamsdisdrometer Datastreamsdisdrometer Documentation Data Quality Plots Citation DOI: 10.5439/1025181 [ What is this? ] Generate Citation ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Datastream : DISDROMETER Disdrometer: measures rain drop size distribution Active Dates 2006.01.11 - 2014.01.09 Measurement Categories Atmospheric State, Cloud Properties Originating Instrument Impact Disdrometer (DISDROMETER) Measurements Only measurements considered scientifically relevant are shown below by default. Show all measurements Measurement Units Variable Altitude above mean sea level m alt Base time in Epoch seconds since 1970-1-1 0:00:00 0:00 base_time Diameter interval between drop size classes mm delta_diam ( drop_class )

6

Analysis of Video Disdrometer and Polarimetric Radar Data to Characterize Rain Microphysics in Oklahoma  

Science Conference Proceedings (OSTI)

In this paper, data from three 2-dimensional video disdrometers (2DVDs) and an S-band polarimetric radar are used to characterize rain microphysics in Oklahoma. Sampling errors from the 2DVD measurements are quantified through side-by-side ...

Qing Cao; Guifu Zhang; Edward Brandes; Terry Schuur; Alexander Ryzhkov; Kyoko Ikeda

2008-08-01T23:59:59.000Z

7

DOE/SC-ARM/TR-079 Disdrometer and Tipping Bucket Rain Gauge  

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

Disdrometer and Tipping Bucket Rain Gauge Handbook MJ Bartholomew December 2009 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

8

Two-Dimensional Video Disdrometer: A Description  

Science Conference Proceedings (OSTI)

This paper describes the design and operation of a two-dimensional video disdrometer (2DVD) for in situ measurements of precipitation drop size distribution. The instrument records orthogonal image projections of raindrops as they cross its ...

Anton Kruger; Witold F. Krajewski

2002-05-01T23:59:59.000Z

9

Comparison of Raindrop Size Distribution Measurements by Collocated Disdrometers  

Science Conference Proceedings (OSTI)

An impact-type Joss–Waldvogel disdrometer (JWD), a two-dimensional video disdrometer (2DVD), and a laser optical OTT Particle Size and Velocity (PARSIVEL) disdrometer (PD) were used to measure the raindrop size distribution (DSD) over a 6-month ...

Ali Tokay; Walter A. Petersen; Patrick Gatlin; Matthew Wingo

2013-08-01T23:59:59.000Z

10

Experimental Test of the Effects of Z–R Law Variations on Comparison of WSR-88D Rainfall Amounts with Surface Rain Gauge and Disdrometer Data  

Science Conference Proceedings (OSTI)

Reflectivity factors and rainfall rates found from Level II WSR-88D data for the National Weather Service (NWS) radar in Greer, South Carolina (KGSP), are compared with similar parameters found from disdrometer data collected at the Clemson ...

Carlton W. Ulbrich; Neil E. Miller

2001-06-01T23:59:59.000Z

11

Drop Axis Ratios from a 2D Video Disdrometer  

Science Conference Proceedings (OSTI)

Results from an experiment to measure the drop shapes using a 2D video disdrometer (2DVD) are reported. Under calm conditions, drops were generated from a hose located on a bridge 80 m above ground, this height being sufficient to allow drop ...

Merhala Thurai; V. N. Bringi

2005-07-01T23:59:59.000Z

12

An Optical Disdrometer for Use in High Wind Speeds  

Science Conference Proceedings (OSTI)

A new optical disdrometer has been developed that is optimized for use in high wind speeds, for example, on board ships. The minimal detectable size of droplets is 0.35 mm. Each drop is measured separately with regard to its size and residence ...

Martin Grossklaus; Klaus Uhlig; Lutz Hasse

1998-08-01T23:59:59.000Z

13

Flux Measurements of Pulsating Rain with a Disdrometer and Doppler Radar during Phase II of the Joint Tropical Rain Experiment in Malaysia  

Science Conference Proceedings (OSTI)

During the Joint Tropical Rain Experiment of the Malaysian Meteorological Service and the University of Toronto, pulsating raindrop ensembles, hereafter pulses, were observed in and around Penang Island. Using a Doppler radar on 25 October 1990, ...

Greg M. McFarquhar; Roland List; David R. Hudak; Robert P. Nissen; J. S. Dobbie; N. P. Tung; T. S. Kang

1996-06-01T23:59:59.000Z

14

Disdrometer Measurements during an Intense Rainfall Event in Central Illinois: Implications for Differential Reflectivity Radar Observations  

Science Conference Proceedings (OSTI)

Empirical relationships for estimating rainfall rate, liquid water content and median volume diameter from radar measurements of reflectivity factor and differential reflectivity are derived from a disdrometer record of a highly variable, heavy ...

T. A. Seliga; K. Aydin; H. Direskeneli

1986-06-01T23:59:59.000Z

15

Wind-Induced Error of Raindrop Size Distribution Measurement Using a Two-Dimensional Video Disdrometer  

Science Conference Proceedings (OSTI)

The authors investigate a disdrometer that provides information on raindrop size distribution, terminal velocity, and shape using video imaging technology. Two video cameras are enclosed in a large box and provide images of the passing drops. The ...

Vladislav Nešpor; Witold F. Krajewski; Anton Kruger

2000-11-01T23:59:59.000Z

16

Articulating and Stationary PARSIVEL Disdrometer Measurements in Conditions with Strong Winds and Heavy Rainfall  

Science Conference Proceedings (OSTI)

The influence of strong winds on the quality of optical PARticle SIze VELocity (PARSIVEL) disdrometer measurements is examined with data from Hurricane Ike in 2008 and from convective thunderstorms observed during the second Verification of the ...

Katja Friedrich; Stephanie Higgins; Forrest J. Masters; Carlos R. Lopez

17

A Self-Evaluating Disdrometer for the Measurement of Raindrop Size and Charge at the Ground  

Science Conference Proceedings (OSTI)

A disdrometer for the measurement of the co-spectra of raindrop size and charge is described which can evaluate to a significant extent spurious data caused by unavoidable drop overlap within the charge detector volume. The sizes of individual ...

C. D. Stow; K. Jones

1981-10-01T23:59:59.000Z

18

A Statistical and Physical Description of Hydrometeor Distributions in Colorado Snowstorms Using a Video Disdrometer  

Science Conference Proceedings (OSTI)

Winter-storm hydrometeor distributions along the Front Range in eastern Colorado are studied with a ground-based two-dimensional video disdrometer. The instrument provides shape, size, and terminal velocity information for particles that are ...

Edward A. Brandes; Kyoko Ikeda; Guifu Zhang; Michael Schönhuber; Roy M. Rasmussen

2007-05-01T23:59:59.000Z

19

Articulating and Stationary PARSIVEL Disdrometer Measurements in Conditions with Strong Winds and Heavy Rainfall  

Science Conference Proceedings (OSTI)

The influence of strong winds on the quality of optical Particle Size Velocity (PARSIVEL) disdrometer measurements is examined with data from Hurricane Ike in 2008 and from convective thunderstorms observed during the second Verification of the ...

Katja Friedrich; Stephanie Higgins; Forrest J. Masters; Carlos R. Lopez

2013-09-01T23:59:59.000Z

20

An Experimental Study of Small-Scale Variability of Radar Reflectivity Using Disdrometer Observations  

Science Conference Proceedings (OSTI)

Analysis of data collected by four disdrometers deployed in a 1-km2 area is presented with the intent of quantifying the spatial variability of radar reflectivity at small spatial scales. Spatial variability of radar reflectivity within the radar ...

Benjamin J. Miriovsky; A. Allen Bradley; William E. Eichinger; Witold F. Krajewski; Anton Kruger; Brian R. Nelson; Jean-Dominique Creutin; Jean-Marc Lapetite; Gyu Won Lee; Isztar Zawadzki; Fred L. Ogden

2004-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rain disdrometer disdrometer" 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

A Field Study of Reflectivity and Z–R Relations Using Vertically Pointing Radars and Disdrometers  

Science Conference Proceedings (OSTI)

Observations from a 16-month field study using two vertically pointing radars and a disdrometer at Wallops Island are analyzed to examine the consistency of the multi-instrument observations with respect to reflectivity and Z–R relations. The ...

Ali Tokay; Peter Hartmann; Alessandro Battaglia; Kenneth S. Gage; Wallace L. Clark; Christopher R. Williams

2009-06-01T23:59:59.000Z

22

Effect of Irregularities in the Diameter Classification of Raindrops by the Joss-Waldvogel Disdrometer  

Science Conference Proceedings (OSTI)

The Joss-Waldvogel Disdrometer (JWD) is an electromechanical counter designed to measure raindrop size distributions for the purpose of calculating radar reflectivities. It has performed this function successfully for 20 years. Recently, JWD ...

Brian E. Sheppard

1990-02-01T23:59:59.000Z

23

Winter Precipitation Microphysics Characterized by Polarimetric Radar and Video Disdrometer Observations in Central Oklahoma  

Science Conference Proceedings (OSTI)

The study of precipitation in different phases is important to understanding the physical processes that occur in storms, as well as to improving their representation in numerical weather prediction models. A 2D video disdrometer was deployed ...

Guifu Zhang; Sean Luchs; Alexander Ryzhkov; Ming Xue; Lily Ryzhkova; Qing Cao

2011-07-01T23:59:59.000Z

24

An Analysis of Errors in Drop Size Distribution Retrievals and Rain Bulk Parameters with a UHF Wind Profiling Radar and a Two-Dimensional Video Disdrometer  

Science Conference Proceedings (OSTI)

Vertically pointed wind profiling radars can be used to obtain measurements of the underlying drop size distribution (DSD) for a rain event by means of the Doppler velocity spectrum. Precipitation parameters such as rainfall rate, radar ...

Laura Kanofsky; Phillip Chilson

2008-12-01T23:59:59.000Z

25

Orientation Angle Distributions of Drops after an 80-m Fall Using a 2D Video Disdrometer  

Science Conference Proceedings (OSTI)

This note reports on the use of a 2D video disdrometer to estimate the orientation of drops (>2 mm) that were generated artificially and allowed to fall 80 m from a bridge with no obstruction and under calm conditions. This experimental setup ...

Gwo-Jong Huang; V. N. Bringi; M. Thurai

2008-09-01T23:59:59.000Z

26

Quantification of the Small-Scale Spatial Structure of the Raindrop Size Distribution from a Network of Disdrometers  

Science Conference Proceedings (OSTI)

The spatial structure of the raindrop size distribution (DSD) conveys crucial information for reliable quantitative estimation of rainfall using remote sensing techniques. To investigate this question, a network of 16 optical disdrometers has been ...

Joël Jaffrain; Alexis Berne

2012-05-01T23:59:59.000Z

27

Drop Size Distributions Measured by a 2D Video Disdrometer: Comparison with Dual-Polarization Radar Data  

Science Conference Proceedings (OSTI)

An analysis of drop size distributions (DSDs) measured in four very different precipitation regimes is presented and is compared with polarimetric radar measurements. The DSDs are measured by a 2D video disdrometer, which is designed to measure ...

Terry J. Schuur; Alexander V. Ryzhkov; Dusan S. Zrni?; Michael Schönhuber

2001-06-01T23:59:59.000Z

28

Listening to Raindrops from Underwater: An Acoustic Disdrometer  

Science Conference Proceedings (OSTI)

Different sized raindrops splashing on a water surface produce sound underwater that is distinctive and can be used to measure the drop size distribution in the rain. Five acoustically significant raindrop sizes are described. An inversion of the ...

Jeffrey A. Nystuen

2001-10-01T23:59:59.000Z

29

Drop Shapes and Axis Ratio Distributions: Comparison between 2D Video Disdrometer and Wind-Tunnel Measurements  

Science Conference Proceedings (OSTI)

Comparisons of drop shapes between measurements made using 2D video disdrometer (2DVD) and wind-tunnel experiments are presented. Comparisons are made in terms of the mean drop shapes and the axis ratio distributions. Very close agreement of the ...

M. Thurai; V. N. Bringi; M. Szakáll; S. K. Mitra; K. V. Beard; S. Borrmann

2009-07-01T23:59:59.000Z

30

Comparison of Raindrop Size Distribution Measurements by a Joss-Waldvogel Disdrometer, a PMS 2DG Spectrometer, and a POSS Doppler Radar  

Science Conference Proceedings (OSTI)

Three techniques for the measurement of raindrop size distributions are compared using data from a Joss-Waldvogel disdrometer (JWD), a Particle Measuring Systems 2DG spectrometer (PMS), and an Atmospheric Environment Service (AES) Precipitation ...

B. E. Sheppard; P. I. Joe

1994-08-01T23:59:59.000Z

31

A Methodology to Derive Radar Reflectivity–Liquid Equivalent Snow Rate Relations Using C-Band Radar and a 2D Video Disdrometer  

Science Conference Proceedings (OSTI)

The objective of this work is to derive equivalent radar reflectivity factor–liquid equivalent snow rate (Ze–SR) power-law relations for snowfall using the C-band King City operational weather radar and a 2D video disdrometer (2DVD). The 2DVD ...

Gwo-Jong Huang; V. N. Bringi; Robert Cifelli; David Hudak; W. A. Petersen

2010-04-01T23:59:59.000Z

32

Observations of Precipitation Size and Fall Speed Characteristics within Coexisting Rain and Wet Snow  

Science Conference Proceedings (OSTI)

Ground-based measurements of particle size and fall speed distributions using a Particle Size and Velocity (PARSIVEL) disdrometer are compared among samples obtained in mixed precipitation (rain and wet snow) and rain in the Oregon Cascade ...

Sandra E. Yuter; David E. Kingsmill; Louisa B. Nance; Martin Löffler-Mang

2006-10-01T23:59:59.000Z

33

ARM - Midlatitude Continental Convective Clouds Experiment (MC3E): Multi-Frequency Profilers, Parcivel Disdrometer (williams-disdro)  

DOE Data Explorer (OSTI)

This data was collected by the NOAA 449-MHz and 2.8-GHz profilers in support of the Department of Energy (DOE) and NASA sponsored Mid-latitude Continental Convective Cloud Experiment (MC3E). The profiling radars were deployed in Northern Oklahoma at the DOE Atmospheric Radiation Mission (ARM) Southern Great Plans (SGP) Central Facility from 22 April through 6 June 2011. NOAA deployed three instruments: a Parsivel disdrometer, a 2.8-GHz profiler, and a 449-MHz profiler. The parasivel provided surface estimates of the raindrop size distribution and is the reference used to absolutely calibrate the 2.8 GHz profiler. The 2.8-GHz profiler provided unattenuated reflectivity profiles of the precipitation. The 449-MHz profiler provided estimates of the vertical air motion during precipitation from near the surface to just below the freezing level. By using the combination of 2.8-GHz and 449-MHz profiler observations, vertical profiles of raindrop size distributions can be retrieved. The profilers are often reference by their frequency band: the 2.8-GHz profiler operates in the S-band and the 449-MHz profiler operates in the UHF band. The raw observations are available as well as calibrated spectra and moments. This document describes how the instruments were deployed, how the data was collected, and the format of the archived data.

Christopher Williams; Mike Jensen

34

Relative Performance of Automatic Rain Gauges under Different Rainfall Conditions  

Science Conference Proceedings (OSTI)

Six different types of automatic rain gauges, including tipping bucket, weighing, capacitance, optical, disdrometer, and acoustical sensors, were deployed for 17 months (September 1993–January 1995) at the NOAA Atlantic Oceanographic and ...

Jeffrey A. Nystuen

1999-08-01T23:59:59.000Z

35

Drop Shapes, Model Comparisons, and Calculations of Polarimetric Radar Parameters in Rain  

Science Conference Proceedings (OSTI)

Drop shapes derived from a previously conducted artificial rain experiment using a two-dimensional video disdrometer (2DVD) are presented. The experiment involved drops falling over a distance of 80 m to achieve their terminal velocities as well ...

M. Thurai; G. J. Huang; V. N. Bringi; W. L. Randeu; M. Schönhuber

2007-06-01T23:59:59.000Z

36

On the Shape–Slope Relation of Drop Size Distributions in Convective Rain  

Science Conference Proceedings (OSTI)

The relation between the slope and shape parameters of the raindrop size distribution parameterized by a gamma distribution is examined. The comparison of results of a simple rain shaft model with an empirical relation based on disdrometer ...

Axel Seifert

2005-07-01T23:59:59.000Z

37

Characteristics of the Raindrop Size Distribution and Drop Shape Relation in Typhoon Systems in the Western Pacific from the 2D Video Disdrometer and NCU C-Band Polarimetric Radar  

Science Conference Proceedings (OSTI)

The drop size distribution (DSD) and drop shape relation (DSR) characteristics that were observed by a ground-based 2D video disdrometer and retrieved from a C-band polarimetric radar in the typhoon systems during landfall in the western Pacific, ...

Wei-Yu Chang; Tai-Chi Chen Wang; Pay-Liam Lin

2009-10-01T23:59:59.000Z

38

Characteristics of Rain Integral Parameters during Tropical Convective, Transition, and Stratiform Rain at Gadanki and Its Application in Rain Retrieval  

Science Conference Proceedings (OSTI)

In the present study the characteristics of rain integral parameters during tropical convective (C), transition (T), and stratiform (S) types of rain are studied with the help of Joss–Waldvogel disdrometer (JWD), L-band, and very-high-frequency ...

Sanjay Sharma; Mahen Konwar; Diganta Kumar Sarma; M. C. R. Kalapureddy; A. R. Jain

2009-06-01T23:59:59.000Z

39

Comparison of Dual-Polarization Radar Measurements of Rain with Ground-Based Disdrometer Measurements  

Science Conference Proceedings (OSTI)

Dual-polarization radar measurements of ZH and ZDR, where ZDR = 10 logZH/ZV and ZH, ZV are the radar reflectivity factors for horizontal and vertical polarizations, respectively, are compared with values derived from raindrop-size distributions ...

J. W. F. Goddard; S. M. Cherry; V. N. Bringi

1982-02-01T23:59:59.000Z

40

A Climatology of Disdrometer Measurements of Rainfall in Finland over Five Years with Implications for Global Radar Observations  

Science Conference Proceedings (OSTI)

To improve the understanding of high-latitude rain microphysics and its implications for the remote sensing of rainfall by ground-based and spaceborne radars, raindrop size measurements have been analyzed that were collected over five years with a ...

Jussi Leinonen; Dmitri Moisseev; Matti Leskinen; Walter A. Petersen

2012-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "rain disdrometer disdrometer" 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

Drop shapes and fall speeds in rain: two contrasting examples  

Science Conference Proceedings (OSTI)

Two rain events are analyzed using two collocated 2D-video disdrometers (2DVD) and a C band polarimetric radar at 15 km distance. Both events had moderate-to-intense rainfall rates, but the second event had an embedded convective line. For the ...

M. Thurai; V. N. Bringi; W. A. Petersen; P. N. Gatlin

42

ARM - Instrument - rain  

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

govInstrumentsrain govInstrumentsrain Documentation RAIN : Handbook RAIN : Instrument Mentor Monthly Summary (IMMS) reports RAIN : Data Quality Assessment (DQA) reports ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Instrument : Rain Gauge (RAIN) Beneficiary of Recovery Act funding. Instrument Categories Surface Meteorology General Overview The tipping bucket rain gauge was located next to the disdrometer. It was replaced with a weighing bucket rain gauge in FY2010. Please contact the instrument mentor, if you have any questions. Output Datastreams rain : Rain gauge Primary Measurements The following measurements are those considered scientifically relevant. Precipitation Locations Eastern North Atlantic

43

Reflectivity, Rain Rate, and Kinetic Energy Flux Relationships Based on Raindrop Spectra  

Science Conference Proceedings (OSTI)

The relationships between radar reflectivity factor Z, rainfall rate R, and rainfall kinetic energy flux E were analyzed based on a multiyear raindrop spectra dataset recorded by a Joss–Waldvogel disdrometer in the Goodwin Creek research ...

Matthias Steiner; James A. Smith

2000-11-01T23:59:59.000Z

44

Distributions of Raindrop Sizes and Fall Velocities in a Semiarid Plateau Climate: Convective versus Stratiform Rains  

Science Conference Proceedings (OSTI)

Joint size and fall velocity distributions of raindrops were measured with a Particle Size and Velocity (PARSIVEL) precipitation particle disdrometer in a field experiment conducted during July and August 2007 at a semiarid continental site ...

Shengjie Niu; Xingcan Jia; Jianren Sang; Xiaoli Liu; Chunsong Lu; Yangang Liu

2010-04-01T23:59:59.000Z

45

ARM - Instrument Handbooks  

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

Bucket Rain Gauge DISDROMETER 2009 Doppler Lidar DL 2012 Eddy Correlation Flux Measurement System ECOR 2011 Energy Balance Bowen Ratio Station EBBR 2011 G-Band (183 GHz)...

46

Diagnosing the Intercept Parameter for Exponential Raindrop Size Distribution Based on Video Disdrometer Observations: Model Development  

Science Conference Proceedings (OSTI)

The exponential distribution N(D) = N0 exp(??D) with a fixed intercept parameter N0 is most commonly used to represent raindrop size distribution (DSD) in rainfall estimation and in single-moment bulk microphysics parameterization schemes. ...

Guifu Zhang; Ming Xue; Qing Cao; Daniel Dawson

2008-11-01T23:59:59.000Z

47

Errors in Estimating Raindrop Size Distribution Parameters Employing Disdrometer and Simulated Raindrop Spectra  

Science Conference Proceedings (OSTI)

There have been debates and differences of opinion over the validity of using drop size distribution (DSD) models to characterize precipitation microphysics and to retrieve DSD parameters from multiparameter radar measurements. In this paper, ...

Qing Cao; Guifu Zhang

2009-02-01T23:59:59.000Z

48

Drop-Size Distributions in Thunderstorms Measured by Optical Disdrometers during VORTEX2  

Science Conference Proceedings (OSTI)

When studying the influence of microphysics on the near-surface buoyancy tendency in convective thunderstorms, in situ measurements of microphysics near the surface are essential and those are currently not provided by most weather radars. In this ...

Katja Friedrich; Evan A. Kalina; Forrest J. Masters; Carlos R. Lopez

2013-04-01T23:59:59.000Z

49

An Optical Disdrometer for the Measurement of Raindrop Size Spectra in Windy Conditions  

Science Conference Proceedings (OSTI)

An instrument for measuring the size and concentration of raindrops is described which has the ability to function equally well in calm conditions and strong winds. Raindrops are detected optically in a shadowgraph-type imaging system. A unique ...

A. J. Illingworth; C. J. Stevens

1987-09-01T23:59:59.000Z

50

Monitoring the Reflectivity Calibration of a Scanning Radar Using a Profiling Radar and a Disdrometer  

Science Conference Proceedings (OSTI)

This paper describes a method of absolutely calibrating and routinely monitoring the reflectivity calibration from a scanning weather radar using a vertically profiling radar that has been absolutely calibrated using a collocated surface ...

Christopher R. Williams; Kenneth S. Gage; Wallace Clark; Paul Kucera

2005-07-01T23:59:59.000Z

51

ARM - Measurement - Hydrometeor fall velocity  

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

fall velocity fall velocity ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Hydrometeor fall velocity Fall velocity of hydrometeors (e.g. rain, snow, graupel, hail). Categories Cloud Properties Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments DISDROMETER : Impact Disdrometer LDIS : Laser Disdrometer WSACR : Scanning ARM Cloud Radar, tuned to W-Band (95GHz) Field Campaign Instruments DISDROMETER : Impact Disdrometer PDI : Phase Doppler Interferometer

52

Variability of Raindrop Size Distributions in a Squall Line and Implications for Radar Rainfall Estimation  

Science Conference Proceedings (OSTI)

The intrastorm variability of raindrop size distributions as a source of uncertainty in single-parameter and dual-parameter radar rainfall estimates is studied using time series analyses of disdrometer observations. Two rain-rate (R) estimators ...

Remko Uijlenhoet; Matthias Steiner; James A. Smith

2003-02-01T23:59:59.000Z

53

Experiments in Rainfall Estimation with a Polarimetric Radar in a Subtropical Environment  

Science Conference Proceedings (OSTI)

A unique dataset consisting of high-resolution polarimetric radar measurements and dense rain gauge and disdrometer observations collected in east-central Florida during the summer of 1998 was examined. Comparison of the radar measurements and ...

Edward A. Brandes; Guifu Zhang; J. Vivekanandan

2002-06-01T23:59:59.000Z

54

Multipeak Raindrop Size Distribution Observed by UHF/VHF Wind Profilers during the Passage of a Mesoscale Convective System  

Science Conference Proceedings (OSTI)

The Indian Mesosphere–Stratosphere–Troposphere radar (IMSTR), Lower Atmospheric Wind Profiler (LAWP), and Joss–Waldvogel (JW) disdrometer measurements during the passage of two distinctly different (in terms of total rain and rainfall rate) ...

B. Radhakrishna; T. Narayana Rao

2009-03-01T23:59:59.000Z

55

Rainfall Parameter Estimation from Dual-Radar Measurements Combining Reflectivity Profile and Path-integrated Attenuation  

Science Conference Proceedings (OSTI)

Rain rate estimation properties of multiparameter radar measurements combining radar reflectivity and microwave attenuations are studied through simulations using a two-year disdrometer dataset. In the first simulation, properties of “complete” ...

Toshiaki Kozu; Kenji Nakamura

1991-04-01T23:59:59.000Z

56

ARM TR-008  

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

Disdrometer and Tipping Bucket Rain Gauge Handbook January 2006 M.J. Bartholomew Work supported by the U.S. Department of Energy, Office of Science, Office of Biological and...

57

Lidar-Based Estimation of Small-Scale Rainfall: Empirical Evidence  

Science Conference Proceedings (OSTI)

A significant scale gap between radar and in situ measurements of rainfall using rain gauges and disdrometers indicates a pressing need for improved knowledge of rainfall variability at the spatial scales below those of today’s operational radar ...

Piotr A. Lewandowski; William E. Eichinger; Anton Kruger; Witold F. Krajewski

2009-03-01T23:59:59.000Z

58

First measurement of the small-scale spatial variability of the rain drop size distribution: Results from a crucial experiment and maximum entropy modeling  

E-Print Network (OSTI)

The main challenges of measuring precipitation are related to the spatio-temporal variability of the drop-size distribution, to the uncertainties that condition the modeling of that distribution, and to the instrumental errors present in the in situ estimations. This PhD dissertation proposes advances in all these questions. The relevance of the spatial variability of the drop-size distribution for remote sensing measurements and hydro-meteorology field studies is asserted by analyzing the measurement of a set of disdrometers deployed on a network of 5 squared kilometers. This study comprises the spatial variability of integral rainfall parameters, the ZR relationships, and the variations within the one moment scaling method. The modeling of the drop-size distribution is analyzed by applying the MaxEnt method and comparing it with the methods of moments and the maximum likelihood. The instrumental errors are analyzed with a compressive comparison of sampling and binning uncertainties that affect actual device...

Checa-Garcia, Ramiro

2013-01-01T23:59:59.000Z

59

ARM - Feature Stories and Releases Article  

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

3, 2012 [Feature Stories and Releases] 3, 2012 [Feature Stories and Releases] SGP Site Staff Share Successes, Challenges in the Name of Science Bookmark and Share Large-scale observation network in Korea opens door to new collaborations Daniel Hartsock and Dr. Kyungjeen Park look on as Pat Dowell describes the operation of a disdrometer at the SGP site. A sensor under the instrument's 'hood' measures rain rate and drop size distribution. Daniel Hartsock and Dr. Kyungjeen Park look on as Pat Dowell describes the operation of a disdrometer at the SGP site. A sensor under the instrument's 'hood' measures rain rate and drop size distribution. Dr. Kyungjeen Park, Korea Meteorological Administration, faces a tremendous responsibility: develop a microscale observing capability to support a major urban atmospheric measurement and modeling project. The project is to

60

Chlorophyll and acid rain  

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

Chlorophyll and acid rain Chlorophyll and acid rain Name: beachbum Status: N/A Age: N/A Location: N/A Country: N/A Date: Around 1993 Question: A while ago I read an article that stated that after a plant received acid rain, there seemed to be less of chlorophyll a and b in the plant. I was wondering where does the chlorophyll go and what is the actual process (cell structure affected?). Replies: I think that less chlorophyll being present would be more likely a result of less being produced. Plant cell constantly turn over cell material, it will also constantly produce more. So if one compares a plant not exposed to acid rain (presumably producing a normal amount of chlorophyll and the exposed plant then one sees that the exposed plant has less chlorophyll than the unexposed plant. I do not think I can answer the rest of your question.

Note: This page contains sample records for the topic "rain disdrometer disdrometer" 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.


61

ARM - Datastreams - rain  

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

Datastreamsrain Datastreamsrain Documentation Data Quality Plots Citation DOI: 10.5439/1025264 [ What is this? ] Generate Citation ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Datastream : RAIN Rain gauge Active Dates 2006.03.01 - 2014.01.09 Measurement Categories Atmospheric State Originating Instrument Rain Gauge (RAIN) Measurements Only measurements considered scientifically relevant are shown below by default. Show all measurements Measurement Units Variable Altitude above mean sea level m alt Base time in Epoch seconds since 1970-1-1 0:00:00 0:00 base_time Record with error unitless error_latch ( time ) Frequency average, sensor 1 Hz frequency1 ( time ) Frequency average, sensor 2 Hz frequency2 ( time )

62

(Acid rain workshop)  

SciTech Connect

The traveler presented a paper entitled Susceptibility of Asian Ecosystems to Soil-Mediated Acid Rain Damage'' at the Second Workshop on Acid Rain in Asia. The workshop was organized by the Asian Institute of Technology (Bangkok, Thailand), Argonne National Laboratory (Argonne, Illinois), and Resource Management Associates (Madison, Wisconsin) and was sponsored by the US Department of Energy, the United Nations Environment Program, the United Nations Economic and Social Commission for Asia and the Pacific, and the World Bank. Papers presented on the first day discussed how the experience gained with acid rain in North America and Europe might be applied to the Asian situation. Papers describing energy use projections, sulfur emissions, and effects of acid rain in several Asian countries were presented on the second day. The remaining time was allotted to discussion, planning, and writing plans for a future research program.

Turner, R.S.

1990-12-05T23:59:59.000Z

63

Rain sampling device  

DOE Patents (OSTI)

The present invention constitutes a rain sampling device adapted for independent operation at locations remote from the user which allows rainfall to be sampled in accordance with any schedule desired by the user. The rain sampling device includes a mechanism for directing wet precipitation into a chamber, a chamber for temporarily holding the precipitation during the process of collection, a valve mechanism for controllably releasing samples of the precipitation from the chamber, a means for distributing the samples released from the holding chamber into vessels adapted for permanently retaining these samples, and an electrical mechanism for regulating the operation of the device. 11 figures.

Nelson, D.A.; Tomich, S.D.; Glover, D.W.; Allen, E.V.; Hales, J.M.; Dana, M.T.

1991-05-14T23:59:59.000Z

64

In Search of the Rain Forest  

E-Print Network (OSTI)

Review: In Search of the Rain Forest By Candace Slater (Candace Slater (Ed. ). In Search of the Rain Forest. Durham:

Hamilton-Smith, Elery

2005-01-01T23:59:59.000Z

65

Singin' in the Rain  

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

Singin' in Singin' in the Rain News Featured Articles 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 Science Headlines Presentations & Testimony News Archives Contact Information Office of Science U.S. Department of Energy 1000 Independence Ave., SW Washington, DC 20585 P: (202) 586-5430 11.25.13 Singin' in the Rain Ultra water-repellent material developed at Brookhaven Lab may lead to many warming applications. Print Text Size: A A A Subscribe FeedbackShare Page Click to enlarge photo. Enlarge Photo Brookhaven Lab physicist Antonio Checco. Photo courtesy of Brookhaven National Laboratory When it comes to designing extremely water-repellent surfaces, shape and size matter. That's the finding of a group of scientists at the U.S. Department of Energy's Brookhaven National Laboratory, who investigated the

66

A Microcomputer Data-Acquisition System for Real-Time Processing of Raindrop Size Distribution Measured with the RD69 Distrometer  

Science Conference Proceedings (OSTI)

The disdrometer is an instrument used worldwide to measure the size distribution of raindrops at ground level. In this paper, a data-acquisition and real-time processing system designed for disdrometer measurements is presented. It is based on a ...

Bernard Campistron; Gilbert Despaux; Jean-Pierre Lacaux

1987-09-01T23:59:59.000Z

67

Optical Rain Gauge and Tipping Bucket Rain Gauge Comparisons  

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

Rain Gauge and Tipping Bucket Rain Gauge Comparisons Rain Gauge and Tipping Bucket Rain Gauge Comparisons at the ARM Climate Research Facility TWP Sites Michael T. Ritsche 1 , Donna J. Holdridge 1 , Amanda Deieso 2 , Amy Kanta 2 , and Jenni Prell 2 1 Environmental Science Division, Argonne National Laboratory, Argonne, IL 2 Department of Geography, Northern Illinois University, DeKalb, IL 1. Introduction Measurement of rainfall and precipitation is a difficult task even in the best of circumstances. Different types of gauges are used depending on the type of precipitation expected (solid or liquid) and the rate at which it falls. The ARM Program uses two types of precipitation sensors in its surface meteorological systems: the optical rain gauge (ORG) and the tipping bucket rain gauge (TBRG). The ORG was originally

68

ARM - Measurement - Hydrometeor Size Distribution  

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

Size Distribution Size Distribution ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Hydrometeor Size Distribution The number of hydrometeors observed in a given size range. Categories Cloud Properties, Atmospheric State Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments LDIS : Laser Disdrometer Datastreams LDIS : Laser Disdrometer Datastreams PARS2 : OTT Parsivel2 Laser Disdrometer VDIS : Video Disdrometer Datastreams VDIS : Video Disdrometer Drop Size Distribution

69

ARM - Facility News Article  

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

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

70

Biases of Rain Retrieval Algorithms for Spaceborne Radar Caused by Nonuniformity of Rain  

Science Conference Proceedings (OSTI)

The biases of various rain retrieval algorithms for a spaceborne rain radar due to nonuniformity of rain are studied using simple models and an actual time sequence of rainfall rate. A conventional rain retrieval algorithm in which measured radar ...

Kenji Nakamura

1991-06-01T23:59:59.000Z

71

A Probability Distribution Model for Rain Rate  

Science Conference Proceedings (OSTI)

A systematic approach is suggested for modeling the probability distribution of rain rate. Rain rate, conditional on rain and averaged over a region, is modeled as a temporally homogeneous diffusion process with appropriate boundary conditions. ...

Benjamin Kedem; Harry Pavlopoulos; Xiaodong Guan; David A. Short

1994-12-01T23:59:59.000Z

72

Warm Rain Study in Hawaii—Rain Initiation  

Science Conference Proceedings (OSTI)

More than 300 hours of aircraft flights were conducted in Hawaii from 1977 to 1979 to study precipitation mechanisms in warm rain. Airborne instruments were used to measure drop size distributions over the size range from cloud droplets to ...

Tsutomu Takahashi

1981-02-01T23:59:59.000Z

73

Controlling acid rain : policy issues  

E-Print Network (OSTI)

The policy and regulatory ramifications of U.S. acid rain control programs are examined; particularly, the alternative of a receptor-oriented strategy as constrasted to emission-oriented proposals (e.g., the Mitchell bill) ...

Fay, James A.

1983-01-01T23:59:59.000Z

74

Estimating Rain Rates from Tipping-Bucket Rain Gauge Measurements  

Science Conference Proceedings (OSTI)

This paper describes the cubic spline–based operational system for the generation of the Tropical Rainfall Measuring Mission (TRMM) 1-min rain-rate product 2A-56 from tipping-bucket (TB) gauge measurements. A simulated TB gauge from a Joss–...

Jianxin Wang; Brad L. Fisher; David B. Wolff

2008-01-01T23:59:59.000Z

75

Interactions between Rain and Wind Waves  

Science Conference Proceedings (OSTI)

Effects of rain on surface waves have been investigated in a circulating wind-wave tank. Surface displacement and slope spectra under different wind velocities were measured near the upwind and downwind edges of a region with simulated rains. ...

Ying-Keung Poon; Shih Tang; Jin Wu

1992-09-01T23:59:59.000Z

76

Rain Rate Estimates from Differential Polarization Measurements  

Science Conference Proceedings (OSTI)

This paper presents an analysis of the accuracy of rain rate estimates from data observed with a radar that has alternating horizontal and vertical polarization. Theoretical accuracies of rain rates from the reflectivity, the differential ...

M. Sachidananda; D. S. Zrni?

1987-12-01T23:59:59.000Z

77

NEWTON: Why Does It Rain  

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

Why Does It Rain? Why Does It Rain? Name: Drama Status: student Grade: K-3 Location: FL Country: USA Date: Fall 2011 Question: Why does it rain? Replies: Drama, When water is heated it evaporates into the air. You cannot see the water in the air, but sometimes you can feel it (especially when it is hot outside). Have you ever noticed that on some warm days it is really humid (sticky and sweaty) and other warm days it feels dry? You might have also noticed that in the morning, when the air is cool, you might find dew or mist on the leaves and grass. This occurs because cold air cannot hold much of moisture. There is a limit to the amount of water that air can hold. This limit is known as the saturation limit (or dew point). When the air is completely saturated and cannot hold any more water, then it comes down as rain (and leaves all that heat in the air).

78

A Piezoelectrical Rain Gauge for Application on Buoys  

Science Conference Proceedings (OSTI)

Rain gauge systems are required to measure rainfall data on buoys at oceanic sites that are not suited for conventional rain sensors. A piezoelectrical rain gauge has been developed for use on buoys, to provide rain measurements just above the ...

Jörg Förster; Giselher Gust; Siegfried Stolte

2004-02-01T23:59:59.000Z

79

ARM - Evaluation Product - Quantitative Precipitation Estimates (QPE) from  

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

ProductsQuantitative Precipitation Estimates (QPE) ProductsQuantitative Precipitation Estimates (QPE) from the CSAPR Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Evaluation Product : Quantitative Precipitation Estimates (QPE) from the CSAPR Site(s) SGP TWP General Description Precipitation rates from cloud systems can give a fundamental insight into the processes occurring in-cloud. While rain gauges and disdrometers can give information at a single point, remote sensors such as radars can provide rainfall information over a defined area. The QPE value-added product (VAP) takes the Corrected Moments in Antenna Coordinates VAP and maps the Rain_rate_A field onto a Cartesian grid at the surface. This field is the rain rate as determined using the specific attenuation (A, dBZ/km) due to two-way liquid attenuation after Ryzhkov et

80

Multimodal Raindrop Size Distributions  

Science Conference Proceedings (OSTI)

The raindrop size distributions (DSDs) observed over a short span usually have an erratic shape, with several relative maxima. This multimodal structure is studied from disdrometer data acquired in tropical and midlatitude areas. It is shown that ...

Henri Sauvageot; Manlandon Koffi

2000-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "rain disdrometer disdrometer" 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.


81

Observations of the Small-Scale Variability of Precipitation Using an Imaging Radar  

Science Conference Proceedings (OSTI)

For many years, spatial and temporal inhomogeneities in precipitation fields have been studied using scanning radars, cloud radars, and disdrometers, for example. Each measurement technique has its own advantages and disadvantages. Conventional ...

Robert D. Palmer; Boon Leng Cheong; Michael W. Hoffman; Stephen J. Frasier; F. J. López-Dekker

2005-08-01T23:59:59.000Z

82

Raindrop Size Distributions and the Radar Bright Band  

Science Conference Proceedings (OSTI)

The relationship between raindrop size distribution, measured with a disdrometer, and a radar parameter of the melting-layer bright band is investigated. The data, obtained in July 1993 in Switzerland, cover 120 h of precipitation. A good ...

A. Huggel; W. Schmid; A. Waldvogel

1996-10-01T23:59:59.000Z

83

Remote Sensing of Hail with a Dual Linear Polarization Radar  

Science Conference Proceedings (OSTI)

A technique for the remote sensing of hail with an S-band dual linear polarization radar is described. The method employs a new hail signal HDR, which is derived from disdrometer measurements of raindrop size distributions. Experimental ...

K. Aydin; T. A. Seliga; V. Balaji

1986-10-01T23:59:59.000Z

84

Simulation of Radar Reflectivity and Surface Measurements of Rainfall  

Science Conference Proceedings (OSTI)

Raindrop size distributions (RSDs) are often estimated using surface raindrop sampling devices (e.g., disdrometers) or optical array (2D-PMS) probes. A number of authors have used these measured distributions to compute certain higher-order RSD ...

V. Chandrasekar; V. N. Bringi

1987-09-01T23:59:59.000Z

85

Sensitivity of a Simulated Midlatitude Squall Line to Parameterization of Raindrop Breakup  

Science Conference Proceedings (OSTI)

This paper describes idealized simulations of a squall line observed on 20 June 2007, in central Oklahoma. Results are compared with measurements from dual-polarization radar and surface disdrometer. The baseline model configuration qualitatively ...

Hugh Morrison; Sarah A. Tessendorf; Kyoko Ikeda; Gregory Thompson

2012-08-01T23:59:59.000Z

86

Modeling the Variability of Drop Size Distributions in Space and Time  

Science Conference Proceedings (OSTI)

The information on the time variability of drop size distributions (DSDs) as seen by a disdrometer is used to illustrate the structure of uncertainty in radar estimates of precipitation. Based on this, a method to generate the space–time ...

Gyu Won Lee; Alan W. Seed; Isztar Zawadzki

2007-06-01T23:59:59.000Z

87

Modeling Raindrop Size Distribution and Z(R) Relations in the Western Mediterranean Area  

Science Conference Proceedings (OSTI)

This study shows the results of the modeling of drop size distributions (DSD) observed during a 2-yr study in Barcelona. Thirty-second individual sample collections of drop sizes and velocities were measured with an optical disdrometer and ...

Carlos Cerro; Bernat Codina; Joan Bech; Jeroni Lorente

1997-11-01T23:59:59.000Z

88

Instrumental Uncertainties in Z–R Relationships and Raindrop Fall Velocities  

Science Conference Proceedings (OSTI)

This study demonstrates the sensitivity of reflectivity–rainfall rate (Z–R) relationships, which were derived from disdrometer-based drop size distribution measurements, to the fall velocity of the drops. The dataset used comes from the ...

Christian Salles; Jean-Dominique Creutin

2003-02-01T23:59:59.000Z

89

Comparison of WPMM versus Regression for Evaluating Z–R Relationships  

Science Conference Proceedings (OSTI)

The accuracy of the estimation of Z–R relationships is evaluated for the Window Probability Matching Method (WPMM) and regression methods. The evaluation is based on experiments of random subsampling of disdrometer-obtained 1-min reflectivity Z ...

Daniel Rosenfeld; Eyal Amitai

1998-10-01T23:59:59.000Z

90

Raindrop Size Distribution Measurements in Tropical Cyclones  

Science Conference Proceedings (OSTI)

Characteristics of the raindrop size distribution in seven tropical cyclones have been studied through impact-type disdrometer measurements at three different sites during the 2004–06 Atlantic hurricane seasons. One of the cyclones has been ...

Ali Tokay; Paul G. Bashor; Emad Habib; Takis Kasparis

2008-05-01T23:59:59.000Z

91

Advanced Rain/No-Rain Classification Methods for Microwave Radiometer Observations over Land  

Science Conference Proceedings (OSTI)

Seto et al. developed rain/no-rain classification (RNC) methods over land for the Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI). In this study, the methods are modified for application to other microwave radiometers. The ...

Shinta Seto; Takuji Kubota; Nobuhiro Takahashi; Toshio Iguchi; Taikan Oki

2008-11-01T23:59:59.000Z

92

Evidence for an Oscillatory Rain Rate in a Midwestern Winter Rain  

Science Conference Proceedings (OSTI)

Rain rate during light precipitation in winter was measured with high temporal resolution optical systems at a site in Illinois. In addition to quasi-periodic variations, a clearly sinusoidal oscillation in rain rate was found imbedded in the ...

R. B. Fritz; R. J. Hill; J. T. Priestley; W. P. Schoenfeld

1988-02-01T23:59:59.000Z

93

The Relation between the Area-Average Rain Rate and the Rain Cell Size Distribution Parameters  

Science Conference Proceedings (OSTI)

A review of the literature on the rain cell diameter distribution (RCDD) is first presented. It shows that RCDD, for a given rain-rate threshold ?, is accurately described by an exponential distribution with an exponential parameter ? weakly ...

Henri Sauvageot; Frédéric Mesnard; Ricardo S. Tenório

1999-01-01T23:59:59.000Z

94

Urban Modification of Freezing-Rain Events  

Science Conference Proceedings (OSTI)

A new national database for freezing-rain occurrences during the 1945–2000 period provided an opportunity for a study of the potential urban effects on freezing-rain events. Numerous past studies of snowfall events in urban areas have defined ...

Stanley A. Changnon

2003-06-01T23:59:59.000Z

95

Sources of Data on Freezing Rain and Resulting Damages  

Science Conference Proceedings (OSTI)

Freezing rain produces major damages each year in the United States, and various affected groups continue to seek data on the incidence and losses produced by freezing rain. The various kinds of data available about freezing rain and related ...

Stanley A. Changnon; Tamara G. Creech

2003-10-01T23:59:59.000Z

96

SAR Imagery: Rain Forests, South America  

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

Images of Rain Forests in South America Images of Rain Forests in South America The ORNL DAAC now offers a CD-ROM volume containing Synthetic Aperture Radar (SAR) imagery of the rain forest region of South America, including the Amazon Basin. The images were collected during 1995-1996 as part of an international project led by the National Space Development Agency of Japan (NASDA) to map the world's rain forest regions to high resolution by means of SAR. The 4-disc volume--entitled "JERS-1 SAR Global Rain Forest Mapping Project: Vol. AM-1, South America"--is made available under the auspices of the Large-Scale Biosphere-Atmosphere Experiment in Amazonia (LBA). These CDs can be ordered through the ORNL DAAC at http://daac.ornl.gov/prepaks.shtml (look for the "LBA" listings).

97

Slide 1  

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

Estimates of Cloud and Rainfall Parameters Estimates of Cloud and Rainfall Parameters In the Atmospheric Vertical Column above the ARM SGP Site Sergey Matrosov CIRES, University of Colorado and NOAA Earth System Research Laboratory Retrievables: mean rainfall rate (R m ) and/or rain water path (RWP), cloud liquid water path (LWP) (D < 50 μm or so) (cloud and rain water can co-exist in the same volume) ice water path (IWP) and/or ice water content (IWC) profiles in a precipitating cloud above the freezing level (All retrieved parameters correspond to the same vertical column) Approach: attenuation based retrievals using WACR (and MMCR) in the liquid hydrometeor layer MMCR absolute reflectivity based retrievals of IWP and IWC (the reflectivities are corrected for attenuation) Instruments: WACR, MMCR, KVNX radar (NEXRAD), JWD (disdrometer)

98

Formalism for Comparing Rain Estimation Designs  

Science Conference Proceedings (OSTI)

Space-time averages of rain rates are needed in several applications. Nevertheless, they are difficult to estimate because the methods invariably leave gaps in the measurements in space or time. A formalism is developed which makes use of the ...

Gerald R. North; Shoichiro Nakamoto

1989-12-01T23:59:59.000Z

99

Temporal Sampling Requirements for Automatic Rain Gauges  

Science Conference Proceedings (OSTI)

Automatic rain gauges are needed to obtain rainfall statistics from remote locations and platforms. Many of these platforms cannot be serviced regularly, thus requiring unattended operations for many months. At such locations there is often a ...

Jeffrey A. Nystuen

1998-12-01T23:59:59.000Z

100

The Hunter Region (Australia) Acid Rain Project  

Science Conference Proceedings (OSTI)

Field measurements for the Hunter Region Acid Rain Project were conducted as a major co-operative effort by the New South Wales State Pollution Control Commission, the Electricity Commission of New South Wales, and the University of Newcastle in ...

Howard A. Bridgman; Robert Rothwell; Christopher Pang Way; Peng-Hing Tio

1988-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "rain disdrometer disdrometer" 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.


101

Freezing Rain: An Observational and Theoretical Study  

Science Conference Proceedings (OSTI)

Data from a Doppler radar, an instrumented aircraft, and several rawinsonde observations during freezing rain and ice pellet events have been analyzed for this study. From these data, 34 soundings were obtained that characterized the vertical ...

Ryan J. Zerr

1997-12-01T23:59:59.000Z

102

RADIOACTIVITY IN RAIN WATER IN BANGKOK  

SciTech Connect

In order to check the effect of nuclear explosions on the atmosphere over Bangkok, rain water was evaporated and the radioactivity of the residue obtained was counted by a G. M. counter. The result shows that the radioactivity in the rain water began to rise from the normal level since 26 September 1961, reached the maximum on 10 November 1961, and then slowly declined. Because the level of radiation remained above that of the Maximum Permissible Concentration (MPC) for only a short time, it did not constitute a health hazard. Analysis of the residue of rain water indicates that the increase in radiation is caused by the fall-out from the Russian tests of nuclear weapons in the air from September to October 1961. (auth)

Sundara-vicharana, Y.; Bhodigen, S.; Hayodom, V.

1961-12-01T23:59:59.000Z

103

Rain initiation time in turbulent warm clouds  

E-Print Network (OSTI)

We present a mean-field model that describes droplet growth due to condensation and collisions and droplet loss due to fallout. The model allows for an effective numerical simulation. We study how the rain initiation time depends on different parameters. We also present a simple model that allows one to estimate the rain initiation time for turbulent clouds with an inhomogeneous concentration of cloud condensation nuclei. In particular, we show that over-seeding even a part of a cloud by small hygroscopic nuclei one can substantially delay the onset of precipitation.

Falkovich, G; Vucelja, M

2004-01-01T23:59:59.000Z

104

Rain initiation time in turbulent warm clouds  

E-Print Network (OSTI)

We present a mean-field model that describes droplet growth due to condensation and collisions and droplet loss due to fallout. The model allows for an effective numerical simulation. We study how the rain initiation time depends on different parameters. We also present a simple model that allows one to estimate the rain initiation time for turbulent clouds with an inhomogeneous concentration of cloud condensation nuclei. In particular, we show that over-seeding even a part of a cloud by small hygroscopic nuclei one can substantially delay the onset of precipitation.

G. Falkovich; M. G. Stepanov; M. Vucelja

2004-11-22T23:59:59.000Z

105

A Study of the Mechanisms of Acid Rain Formation  

Science Conference Proceedings (OSTI)

Samples of rain, snow, cloud water, aerosols and soil were collected in Colorado to study the mechanisms of acid rain formation. Chemical compositions of various types of samples were analyzed to investigate the stepwise incorporation of ...

Farn Parungo; Clarence Nagamoto; Robin Maddl

1987-11-01T23:59:59.000Z

106

The Rain Profiling Algorithm Applied to Polarimetric Weather Radar  

Science Conference Proceedings (OSTI)

The algorithm developed in this paper for ground-based polarimetric radars is derived from those used for the spaceborne rain radar of TRMM (Tropical Rainfall Measurement Mission)—the so-called rain profiling algorithms. The characteristic of ...

Jacques Testud; Erwan Le Bouar; Estelle Obligis; Mustapha Ali-Mehenni

2000-03-01T23:59:59.000Z

107

Estimation of Mean Rain Rate through Censoring  

Science Conference Proceedings (OSTI)

A mixed lognormal distribution is fit to rain-rate data to estimate the space–time average. To mitigate problems associated with biased data, data below a minimum and above a maximum threshold are treated as if they are at the respective ...

Donald Martin

1999-06-01T23:59:59.000Z

108

ARMAR: An Airborne Rain-Mapping Radar  

Science Conference Proceedings (OSTI)

A new airborne rain-mapping radar (ARMAR) has been developed by NASA and the Jet Propulsion Laboratory for operation on the NASA Ames DC-8 aircraft. The radar operates at 13.8 GHz, the frequency to be used by the radar on the Tropical Rainfall ...

S. L. Durden; E. Im; F. K. Li; W. Ricketts; A. Tanner; W. Wilson

1994-06-01T23:59:59.000Z

109

Determination of Oceanic Rain Rate and Rain Cell Structure from Altimeter Waveform Data. Part I: Theory  

Science Conference Proceedings (OSTI)

The predominant effect of rain on altimeter data is through the attenuation it causes of radar pulses propagating through it. Both the ERS-1 and TOPEX/Poseidon have recorded sharp decreases in the observed backscatter ?0, which have been ...

Graham D. Quartly

1998-12-01T23:59:59.000Z

110

A Probabilistic View on the Rain Drop Size Distribution Modeling: a Physical Interpretation of Rain Microphysics  

Science Conference Proceedings (OSTI)

The Rain Drop Size Distribution (RDSD) is defined as the relative frequency of raindrops per given diameter in a volume. This paper describes a mathematically-consistent modeling of the RDSD drawing on probability theory. It is shown that this ...

Francisco J. Tapiador; Ziad S. Haddad; Joe Turk

111

Principal Modes of Variation of Rain-Rate Probability Distributions  

Science Conference Proceedings (OSTI)

Radar or satellite observations of an area generate sequences of rain-rate maps. From a gridded map a histogram of rain rates can be obtained representing the relative areas occupied by rain rates of various strengths. The histograms vary with ...

Thomas L. Bell; R. Suhasini

1994-09-01T23:59:59.000Z

112

ARM - Measurement - Precipitation  

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

govMeasurementsPrecipitation govMeasurementsPrecipitation ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Precipitation All liquid or solid phase aqueous particles that originate in the atmosphere and fall to the earth's surface. Categories Atmospheric State Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments CO2FLX : Carbon Dioxide Flux Measurement Systems DISDROMETER : Impact Disdrometer LDIS : Laser Disdrometer MWRHF : Microwave Radiometer - High Frequency

113

ARM - Instrument - vdis  

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

govInstrumentsvdis govInstrumentsvdis Documentation VDIS : Instrument Mentor Monthly Summary (IMMS) reports VDIS : Data Quality Assessment (DQA) reports ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Instrument : Video Disdrometer (VDIS) Instrument Categories Surface Meteorology General Overview A disdrometer is an instrument used to measure the drop size distribution and velocity of falling hydrometeors. The 2-dimensional video-disdrometer (vdis) is comprised of video cameras capable of observing individual hydrometeors from views perpendicular to each other. Two CCD line scan cameras are directed towards the measurement area. Objects passing thru the measurement area-which is determined by the cross-section of the two

114

ARM - Measurement - Hydrometeor size  

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

size size ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Hydrometeor size The size of a hydrometeor, measured directly or derived from other measurements . Categories Cloud Properties Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments DISDROMETER : Impact Disdrometer LDIS : Laser Disdrometer External Instruments CPOL : C-Band Polarimetric Radar Field Campaign Instruments EC-CONVAIR580-BULK : Environment Canada Convair 580 Bulk Parameters

115

The greenhouse effect and acid rain  

DOE Green Energy (OSTI)

The concentrations of carbon dioxide, methane, sulfur dioxide, nitrous oxides and chlorofluorocarbons is increasing in the earth's atmosphere. Increased concentrations of these trace gases could lead to global warming, increased acid rain and increased UV radiation on the earth's surface; however, the actual impacts are still uncertain and are also the subject of great debate. Application of clean'' energy sources such as geothermal are obviously desirable for decreasing these effects and improving our overall general environment. This paper briefly summarizes the global environment concerns, providing a backdrop for the following papers which describe the geothermal role in future environmental considerations. 5 refs., 2 figs., 1 tab.

Traeger, R.K.

1990-01-01T23:59:59.000Z

116

Evaluation and performance prediction of cooling tower rain zones.  

E-Print Network (OSTI)

??Cooling tower rain zone performance characteristics such as the loss coefficient and the Merkel number are evaluated and simulated. To this end the influence of… (more)

Pierce, Darren John

2007-01-01T23:59:59.000Z

117

Rain Attenuation Prediction Model for Lagos at Millimeter Wave Bands  

Science Conference Proceedings (OSTI)

Rain Attenuation Prediction Model for Lagos at Millimeter Wave bands” is the subject of this work. Lagos (geog. Lat. 6.350N and Long. 3.20E), is a coastal station in the rain forest area in the South-Western Nigeria with an altitude of 380 ...

Abayomi Isiaka Yussuff; Nor Hisham Haji Khamis

118

ARM - Site Instruments  

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

Darwin SiteInstruments Darwin SiteInstruments TWP Related Links Facilities and Instruments Manus Island Nauru Island Darwin, AUS ES&H Guidance Statement Operations Science Field Campaigns Year of Tropical Convection Visiting the Site TWP Fact Sheet Images Information for Guest Scientists Contacts Instruments : Central Facility, Darwin, Australia [ Single installation ] AERI Atmospheric Emitted Radiance Interferometer Radiometric Browse Plots Browse Data [ Single installation ] CSPHOT Cimel Sunphotometer Aerosols, Radiometric Browse Data [ Single installation ] DISDROMETER Impact Disdrometer Surface Meteorology Browse Plots Browse Data [ Single installation ] DL Doppler Lidar Cloud Properties Browse Data [ Single installation ] GNDRAD Ground Radiometers on Stand for Upwelling Radiation Radiometric Browse Plots

119

ARM - Site Instruments  

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

PacificInstruments PacificInstruments TWP Related Links Facilities and Instruments Manus Island Nauru Island Darwin, AUS ES&H Guidance Statement Operations Science Field Campaigns Year of Tropical Convection Visiting the Site TWP Fact Sheet Images Information for Guest Scientists Contacts Instruments : Tropical Western Pacific [ Installed at 3 facilities ] AERI Atmospheric Emitted Radiance Interferometer Radiometric Browse Plots Browse Data [ Installed at 2 facilities ] CSAPR C-Band ARM Precipitation Radar Cloud Properties Browse Data [ Installed at 3 facilities ] CSPHOT Cimel Sunphotometer Aerosols, Radiometric Browse Data [ Single installation ] DISDROMETER Impact Disdrometer Surface Meteorology Browse Plots Browse Data [ Single installation ] DL Doppler Lidar Cloud Properties Browse Data [ Installed at 3 facilities ]

120

Microsoft PowerPoint - 16.0855_Raines Draft Rev 4 | Department...  

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

0855Raines Draft Rev 4 Microsoft PowerPoint - 16.0855Raines Draft Rev 4 Microsoft PowerPoint - 16.0855Raines Draft Rev 4 More Documents & Publications Earned Value (EV) Analysis...

Note: This page contains sample records for the topic "rain disdrometer disdrometer" 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.


121

Comparison of Rain Rates over the Ocean Derived from TRMM Microwave Imager and Precipitation Radar  

Science Conference Proceedings (OSTI)

Surface rain rates over the ocean derived from the Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI) and precipitation radar (PR) are compared and systematic differences between TMI-derived rain rates and PR-derived rain rates are ...

Junji Ikai; Kenji Nakamura

2003-12-01T23:59:59.000Z

122

The greenhouse effect and acid rain  

SciTech Connect

The concentrations of carbon dioxide, methane, sulfur dioxide, nitrous oxides and chlorofluorocarbons is increasing in the earth's atmosphere. Increased concentrations of these trace gases could lead to global warming, increased acid rain and increased UV radiation on the earth's surface; however, the actual impacts are still uncertain and are also the subject of great debate. Application of clean'' energy sources such as geothermal are obviously desirable for decreasing these effects and improving our overall general environment. This paper briefly summarizes the global environment concerns, providing a backdrop for the following papers which describe the geothermal role in future environmental considerations. 5 refs., 2 figs., 1 tab.

Traeger, R.K.

1990-01-01T23:59:59.000Z

123

Acid rain: discerning the change in waters and woodlands  

Science Conference Proceedings (OSTI)

The research being done to establish the effects of acid rain on the earth's waters and woods is presented. It is pointed out that definitive answers cannot be possible because of the lack of scientifically credible, consistent, long-term data on trends. Various specific programs now under way to collect adequate data are highlighted. Researchers are not yet able to predict an area's susceptibility to acidic rain damage, but are more confident that acid rain is only a minimal threat to the earth's water and soil ecosystems. 13 figures.

Lihach, N.; Brocksen, R.; Goldstein, R.; Huckabee, J.; Kawaratani, R.; Mattice, J.; Murarka, I.; Perhac, R.

1983-11-01T23:59:59.000Z

124

Solar Decathlon: Rain and Shine | Department of Energy  

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

Solar Decathlon: Rain and Shine Solar Decathlon: Rain and Shine Solar Decathlon: Rain and Shine October 20, 2009 - 7:00am Addthis Drew Bittner Web Manager, Office of Energy Efficiency and Renewable Energy Friday marked the end of the Solar Decathlon competition. Team Germany won (for the second time) in a very competitive field, in a ceremony marked by gray skies, cold temperatures and rain. For all the bad weather, however, the mood in DC was very upbeat. This was the fourth Solar Decathlon, an event that has seen great strides since its launch in 2002. The mission of the event is to promote solar energy and energy efficiency in buildings, through innovative engineering and scholarly dedication. I would venture to say that this year might mark the event's greatest success, with TWO teams from Canada, as well as returning

125

Solar Decathlon: Rain and Shine | Department of Energy  

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

Solar Decathlon: Rain and Shine Solar Decathlon: Rain and Shine Solar Decathlon: Rain and Shine October 20, 2009 - 7:00am Addthis Drew Bittner Web Manager, Office of Energy Efficiency and Renewable Energy Friday marked the end of the Solar Decathlon competition. Team Germany won (for the second time) in a very competitive field, in a ceremony marked by gray skies, cold temperatures and rain. For all the bad weather, however, the mood in DC was very upbeat. This was the fourth Solar Decathlon, an event that has seen great strides since its launch in 2002. The mission of the event is to promote solar energy and energy efficiency in buildings, through innovative engineering and scholarly dedication. I would venture to say that this year might mark the event's greatest success, with TWO teams from Canada, as well as returning

126

The Effects of Rain on Topex Radar Altimeter Data  

Science Conference Proceedings (OSTI)

Rain has long been categorized as a contaminant of altimeter data, but little has been done previously to ascertain the magnitude and frequency of its effect or its geographical distribution. Proceeding from recent analysis of ERS-1 data, and the ...

G. D. Quartly; T. H. Guymer; M. A. Srokosz

1996-12-01T23:59:59.000Z

127

Freezing Rain Simulations for Fixed, Unheated Conductor Samples  

Science Conference Proceedings (OSTI)

The present paper reports on extensive experiments performed on short, fixed, unheated conductor samples in an outdoor freezing rain simulator. Their purpose is to relate the weight of ice (or, alternatively, the equivalent radial ice thickness) ...

M. L. Lu; N. Popplewell; A. H. Shah

2000-12-01T23:59:59.000Z

128

ATLAS Self-Siphoning Rain Gauge Error Estimates  

Science Conference Proceedings (OSTI)

This report describes sampling and error characteristics of self-siphoning rain gauges used on moored buoys designed and assembled at NOAA's Pacific Marine Environmental Laboratory (PMEL) for deployment in the tropical Pacific and Atlantic Oceans ...

Yolande L. Serra; Patrick A'Hearn; H. Paul Freitag; Michael J. McPhaden

2001-12-01T23:59:59.000Z

129

A Rain-Rate Retrieval Algorithm for Attenuated Radar Measurements  

Science Conference Proceedings (OSTI)

A dynamic regularization scheme for rain-rate retrievals from attenuated radar measurements is presented. Most regularization techniques, including the optimal estimation method, use the state-space parameters to regularize the problem, which ...

Prabhat K. Koner; Alessandro Battaglia; Clemens Simmer

2010-03-01T23:59:59.000Z

130

The Effects of Rain on ERS-1 Radar Altimeter Data  

Science Conference Proceedings (OSTI)

An investigation into a potentially important, but little-studied effect on altimeter data—rain contamination—has been carried out using ERS-1. The method involves identifying large changes in the radar backscatter coefficient and relating these ...

Trevor H. Guymer; Graham D. Quartly; Meric A. Srokosz

1995-12-01T23:59:59.000Z

131

A Climate Transect through Tropical Montane Rain Forest in Hawaii  

Science Conference Proceedings (OSTI)

Two years of climate data from a transect of three surface meteorological stations on the windward slopes of Mauna Loa, Hawaii, are analyzed. The stations constitute a transect between 700 and 1640 m through the wet, montane rain forest zone ...

James O. Juvik; Dennis Nullet

1994-11-01T23:59:59.000Z

132

The Development of Drop Size Distributions in Light Rain  

Science Conference Proceedings (OSTI)

A model of rain development based on the quasi-stochastic coalescence equation and including the sedimentation of drops has been used to study the formation of drop size distributions in conditions of weak updraft. Comparisons with “box model” ...

I. Zawadzki; E. Monteiro; F. Fabry

1994-04-01T23:59:59.000Z

133

An Overview of Acid Rain Monitoring Activities in North America  

Science Conference Proceedings (OSTI)

The various forms of acidic components that may be deposited from the atmosphere are reviewed. These components are classified into three categories: wet deposition (rain and snow), dry deposition (particles and gases), and special events (dews, ...

Joe Wisniewski; John D. Kinsman

1982-06-01T23:59:59.000Z

134

Variability of Space–Time Mean Rain Rate  

Science Conference Proceedings (OSTI)

A mixed lognormal distribution is fit to rain-rate data for the purpose of estimating the space–time mean. Using Fisher information, the large sample variance is obtained for grouped and ungrouped data estimates. The asymptotic variance results ...

B. Kedem; R. Pfeiffer; D. A. Short

1997-05-01T23:59:59.000Z

135

Estimating Rainfall in the Tropics Using the Fractional Time Raining  

Science Conference Proceedings (OSTI)

The relationship between the fractional time raining and tropical rainfall amount is investigated using raingage data and a point process model of tropical rainfall. Both the strength and the nature of the relationship are dependent upon the ...

Mark L. Morrissey; Witold F. Krajewski; Michael J. McPhaden

1994-03-01T23:59:59.000Z

136

Estimating the Uncertainty in Passive-Microwave Rain Retrievals  

Science Conference Proceedings (OSTI)

Current passive-microwave rain-retrieval methods are largely based on databases built offline using cloud models. Since the vertical distribution of hydrometeors within the cloud has a large impact on upwelling brightness temperatures, a forward ...

Dorothée Coppens; Ziad S. Haddad; Eastwood Im

2000-12-01T23:59:59.000Z

137

Comparison of Dual-Polarization Radar Estimators of Rain  

Science Conference Proceedings (OSTI)

Several polarimetric radar estimators of rain rate R and rainwater content M are examined. The accuracy of the estimators is analyzed using a gamma drop size distribution (DSD) simulation and a radar wavelength of 11 cm. The estimators that use ...

A. V. Ryzhkov; D. S. Zrni?

1995-04-01T23:59:59.000Z

138

Rain in Shallow Cumulus Over the Ocean: The RICO Campaign  

Science Conference Proceedings (OSTI)

Shallow, maritime cumuli are ubiquitous over much of the tropical oceans, and characterizing their properties is important to understanding weather and climate. The Rain in Cumulus over the Ocean (RICO) field campaign, which took place during ...

Robert M. Rauber; Harry T. Ochs III; L. Di Girolamo; S. Göke; E. Snodgrass; Bjorn Stevens; Charles Knight; J. B. Jensen; D. H. Lenschow; R. A. Rilling; D. C. Rogers; J. L. Stith; B. A. Albrecht; P. Zuidema; A. M. Blyth; C. W. Fairall; W. A. Brewer; S. Tucker; S. G. Lasher-Trapp; O. L. Mayol-Bracero; G. Vali; B. Geerts; J. R. Anderson; B. A. Baker; R. P. Lawson; A. R. Bandy; D. C. Thornton; E. Burnet; J-L. Brenguier; L. Gomes; P. R. A. Brown; P. Chuang; W. R. Cotton; H. Gerber; B. G. Heikes; J. G. Hudson; P. Kollias; S. K. Krueger; L. Nuijens; D. W. O'Sullivan; A. P. Siebesma; C. H. Twohy

2007-12-01T23:59:59.000Z

139

Test of the Specific Differential Propagation Phase Shift (KDP) Technique for Rain-Rate Estimation with a Ku-Band Rain Radar  

Science Conference Proceedings (OSTI)

The variation in drop size distribution (DSD) and the attenuation at higher frequencies are the two major impairments for quantitative rain-rate estimation. The sensitivity of rain-rate estimators (such as reflectivity factor Z, differential ...

K. Isiah Timothy; Toshio Iguchi; Yuji Ohsaki; Hiroaki Horie; Hiroshi Hanado; Hiroshi Kumagai

1999-08-01T23:59:59.000Z

140

Understanding the Importance of Microphysics and Macrophysics for Warm Rain in Marine Low Clouds. Part II: Heuristic Models of Rain Formation  

Science Conference Proceedings (OSTI)

Two simple heuristic model formulations for warm rain formation are introduced and their behavior explored. The first, which is primarily aimed at representing warm rain formation in shallow convective clouds, is a continuous collection model ...

Robert Wood; Terence L. Kubar; Dennis L. Hartmann

2009-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "rain disdrometer disdrometer" 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.


141

Relation between hydrogen isotopic ratios of bone collagen and rain  

Science Conference Proceedings (OSTI)

The hydrogen isotopic value ([delta]D) of deer bone collagen is related to both [delta]D of rain during the growing season and growing season relative humidity (RH). With correction for the effects of RH, bone [delta]D is related to growing season rain [delta]D in a simple manner with a slope of 1.0. This indicates that, with RH correction, there are no additional sources of bias in the [delta]D of bone due to unaccounted for biologic or climatic effects. Due to a low sensitivity of bone [delta]D to RH effects, both yearly and growing season rain [delta]D can be estimated with considerable accuracy (R = 0.97 and R = 0.96) from bone collagen [delta]D and [delta][sup 15]N. Here, [delta][sup 15]N is used to correct bone [delta]D for the effects of RH. From these estimates of rain [delta]D, it may then be possible to evaluate temperature since the [delta]D of rain primarily reflects local temperature. Therefore, the measurement of bone collagen [delta]D has good potential for evaluating paleoclimates.

Cormie, A.B.; Schwarcz, H.P. (McMaster Univ., Hamilton, Ontario (Canada)); Gray, J. (Univ. of Alberta, Edmonton (Canada))

1994-01-01T23:59:59.000Z

142

A Stochastic Raindrop Time Distribution Model  

Science Conference Proceedings (OSTI)

A disdrometer simultaneously measuring time of arrival and size of raindrops was set up in the Paris, France, area. Data collected over a period of 25 months (May 1992 to May 1994) are presented and analyzed to derive a long-term temporal model ...

J. Lavergnat; P. Golé

1998-08-01T23:59:59.000Z

143

An Experimental Study of Small-Scale Variability of Raindrop Size Distribution  

Science Conference Proceedings (OSTI)

An experimental study of small-scale variability of raindrop size distributions (DSDs) has been carried out at Wallops Island, Virginia. Three Joss–Waldvogel disdrometers were operated at a distance of 0.65, 1.05, and 1.70 km in a nearly straight ...

Ali Tokay; Paul G. Bashor

2010-11-01T23:59:59.000Z

144

Error Structure of Multiparameter Radar and Surface Measurements of Rainfall. Part III: Specific Differential Phase  

Science Conference Proceedings (OSTI)

Parts I and II of this three part paper dealt with the error structure of differential reflectivity and X-band specific attenuation in rainfall as estimated by radar and surface disdrometers. In this Part III paper we focus on the error structure ...

V. Chandrasekar; V. N. Bringi; N. Balakrishnan; D. S. Zrni?

1990-10-01T23:59:59.000Z

145

Aggregate Terminal Velocity/Temperature Relations  

Science Conference Proceedings (OSTI)

Terminal velocities of snow aggregates in storms along the Front Range in eastern Colorado are examined with a ground-based two-dimensional video disdrometer. Power-law relationships for particles having equivalent volume diameters of 0.5–20 mm ...

Edward A. Brandes; Kyoko Ikeda; Gregory Thompson; Michael Schönhuber

2008-10-01T23:59:59.000Z

146

New biology of red rain extremophiles prove cometary panspermia  

E-Print Network (OSTI)

This paper reports the extraordinary biology of the microorganisms from the mysterious red rain of Kerala, India. These chemosynthetic organisms grow optimally at an extreme high temperature of 300 degrees C in hydrothermal conditions and can metabolize inorganic and organic compounds including hydrocarbons. Stages found in their life cycle show reproduction by a special multiple fission process and the red cells found in the red rain are identified as the resting spores of these microbes. While these extreme hyperthermophiles contain proteins, our study shows the absence of DNA in these organisms, indicating a new primitive domain of life with alternate thermostable genetics. This new biology proves our earlier hypothesis that these microbes are of extraterrestrial origin and also supports our earlier argument that the mysterious red rain of Kerala is due to the cometary delivery of the red spores into the stratosphere above Kerala.

Godfrey Louis; A. Santhosh Kumar

2003-12-29T23:59:59.000Z

147

Possible Misidentification of Rain Type by TRMM PR over Tibetan Plateau  

Science Conference Proceedings (OSTI)

Rain-type statistics derived from Tropical Rainfall Measuring Mission (TRMM) precipitation radar (PR) standard product show that some 70% of raining pixels in the central Tibetan Plateau summer are stratiform—a clear contradiction to the common ...

Yunfei Fu; Guosheng Liu

2007-05-01T23:59:59.000Z

148

Incorporating Satellite Observations of “No Rain” in an Australian Daily Rainfall Analysis  

Science Conference Proceedings (OSTI)

Geostationary satellite observations can be used to distinguish potential rain-bearing clouds from nonraining areas, thereby providing surrogate observations of “no rain” over large areas. The advantages of including such observations are the ...

Elizabeth E. Ebert; Gary T. Weymouth

1999-01-01T23:59:59.000Z

149

On a New Approach for Instantaneous Rain Area Delineation in the Midlatitudes Using GOES Data  

Science Conference Proceedings (OSTI)

Using satellite and weather radar data, a simple clustering analysis has been used in order to differentiate between raining and nonraining clouds. Based on these results, a scheme is proposed for instantaneous rain area delineation in the ...

A. A. Tsonis; G. A. Isaac

1985-11-01T23:59:59.000Z

150

Quantitative Measurements of Path-Integrated Rain Rate by an Airborne Microwave Radiometer over the Ocean  

Science Conference Proceedings (OSTI)

Data on the airborne microwave radiometer, which is one of the sensors of the airborne microwave rain-scatterometer/radiometer (AMRS) system, are analyzed to infer path-integrated rain rate measured from topside. The equation of radiative ...

Masaharu Fujita; Ken'ichi Okamoto; Harunobu Masuko; Takeyuki Ojima; Nobuyoshi Fugono

1985-09-01T23:59:59.000Z

151

Computer-Controlled Automated Rain Sampler (CCARS) for Rainfall Measurement and Sequential Sampling  

Science Conference Proceedings (OSTI)

The Computer-Controlled Automated Rain Sampler (CCARS) is a combination rain gage and sequential sampler for precipitation chemistry measurements. The primary objectives of the design are low cost, versatility of operational mode, and remote ...

Stan D. Tomich; M. Terry Dana

1990-08-01T23:59:59.000Z

152

Estimation of Rain and Hail Rates in Mixed-Phase Precipitation  

Science Conference Proceedings (OSTI)

Precipitation comprising rain and hail is studied. Specifically, techniques to identify and quantify such precipitation in terms of rain and hail fall rates using dual polarized radar data, are presented. Included for consideration are ZH, the ...

N. Balakrishnan; D. S. Zrni?

1990-03-01T23:59:59.000Z

153

Optimal Thresholds for the Estimation of Area Rain-Rate Moments by the Threshold Method  

Science Conference Proceedings (OSTI)

Optimization of the threshold method, achieved by determination of the threshold that maximizes the correlation between an area-average rain-rate moment and the area coverage of rain rates exceeding the threshold, is demonstrated empirically and ...

David A. Short; Kunio Shimizu; Benjamin Kedem

1993-02-01T23:59:59.000Z

154

A Synoptic Overview of a Heavy Rain Event in Southern China  

Science Conference Proceedings (OSTI)

The meteorological events surrounding the heavy rains of 23–25 June 1983 in the Yangtze River Valley of China are investigated. The rains developed along a persistent quasi-stationary frontal boundary that separated warm, moist tropical air from ...

Kai-Yu Ma; Lance F. Bosart

1987-06-01T23:59:59.000Z

155

The Supercooled Warm Rain Process and the Specification of Freezing Precipitation  

Science Conference Proceedings (OSTI)

About 30% of freezing precipitation cases are observed to occur in a subfreezing atmosphere (contrary to the classical melting ice model). We explain these cases with the concept of the “supercolled warm rain process” (SWRP): the warm rain ...

George J. Huffman; Gene Alfred Norman Jr.

1988-11-01T23:59:59.000Z

156

Sensitivity of the Estimated Monthly Convective Rain Fraction to the Choice of Z–R Relation  

Science Conference Proceedings (OSTI)

This study investigates the sensitivity of the estimated monthly convective rain fraction—that is, the percentage of the areal rain accumulation contributed by precipitation identified as convective—to variations of the Z–R parameters used in ...

Matthias Steiner; Robert A. Houze Jr.

1997-05-01T23:59:59.000Z

157

Satellite Passive Microwave Rain Rate Measurement over Croplands during Spring, Summer and Fall  

Science Conference Proceedings (OSTI)

Rain rate algorithms for spring, summer and fall that have been developed from comparisons between the brightness temperatures measured by the Nimbus-7 Scanning Multichannel Microwave Radiometer (SMMR) and rain rates derived from operational WSR-...

Roy W. Spencer

1984-11-01T23:59:59.000Z

158

Comparisons of Instantaneous TRMM Ground Validation and Satellite Rain-Rate Estimates at Different Spatial Scales  

Science Conference Proceedings (OSTI)

This study provides a comprehensive intercomparison of instantaneous rain rates observed by the two rain sensors aboard the Tropical Rainfall Measuring Mission (TRMM) satellite with ground data from two regional sites established for long-term ...

David B. Wolff; Brad L. Fisher

2008-08-01T23:59:59.000Z

159

Is Virga Rain That Evaporates before Reaching the Ground?  

Science Conference Proceedings (OSTI)

The visual phenomenon called virga, a sudden change in the brightness of a precipitation shaft below a cloud, is commonly attributed to evaporation of raindrops. It is said to be rain that does not reach the ground. The optical thickness of an ...

Alistair B. Fraser; Craig F. Bohren

1992-08-01T23:59:59.000Z

160

A Rain Gauge for the Measurement of Finescale Temporal Variations  

Science Conference Proceedings (OSTI)

A rain gauge is described that quantizes rainwater collected by a funnel into equal-sized drops. Using a funnel of 150-mm diameter, the quantization corresponds to 1/160 mm of rainfall, enabling the measurement of low rainfall rates and the ...

C. David Stow; Stuart G. Bradley; Keith E. Farrington; Kim N. Dirks; Warren R. Gray

1998-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "rain disdrometer disdrometer" 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.


161

Apparatus for the Simulation of Rain in the Laboratory  

Science Conference Proceedings (OSTI)

Simulated rains are produced by directing a jet of water toward the periphery of an automobile tire that rotates opposite to the flow of water. The air and mechanical turbulence created by the rotating tire surface break the jet up into a spray ...

David R. Derenzo; Bernard Vonnegut

1981-01-01T23:59:59.000Z

162

The Effect of Rain in Calming the Sea  

Science Conference Proceedings (OSTI)

The effect of rain in damping surface waves appears to be significant in the estimation of wind speed from the backscatter of radar signal from the sea surface. The radar backscatter depends on the small-scale roughness of the sea surface. This ...

M. N. Tsimplis

1992-04-01T23:59:59.000Z

163

Probing Hurricanes with Stable Isotopes of Rain and Water Vapor  

Science Conference Proceedings (OSTI)

Rain and water vapor were collected during flights in Hurricanes Olivia (1994), Opal (1995), Marilyn (1995), and Hortense (1995) and analyzed for their stable isotopic concentrations, or ratios, H218O:H2O and HDO:H2O. The spatial patterns and ...

Stanley Gedzelman; James Lawrence; John Gamache; Michael Black; Edward Hindman; Robert Black; Jason Dunion; Hugh Willoughby; Xiaoping Zhang

2003-06-01T23:59:59.000Z

164

Polarimetric Attenuation Correction in Heavy Rain at C Band  

Science Conference Proceedings (OSTI)

The ability of C-band polarimetric radar to account for strong attenuation/differential attenuation is demonstrated in two cases of heavy rain that occurred in the Chicago, Illinois, metropolitan area on 5 August 2008 and in central Oklahoma on ...

Ji-Young Gu; A. Ryzhkov; P. Zhang; P. Neilley; M. Knight; B. Wolf; Dong-In Lee

2011-01-01T23:59:59.000Z

165

The Impacts of Different Satellite Data on Rain Estimation Schemes  

Science Conference Proceedings (OSTI)

Rain estimates for the Great Plains States were made for a one-month period, August 1979, using different combinations of satellite and other data. The data tested were as follows: 1) two satellite images per day without any other data, 2) four ...

Donald P. Wylie; Denise Laitsch

1983-07-01T23:59:59.000Z

166

Forcing Versus Feedback: Epidemic Malaria and Monsoon Rains in Northwest India  

E-Print Network (OSTI)

Forcing Versus Feedback: Epidemic Malaria and Monsoon Rains in Northwest India Karina Laneri1 the monsoonal rains. Consideration of a more complex model with clinical immunity demonstrates the robustness Feedback: Epidemic Malaria and Monsoon Rains in Northwest India. PLoS Comput Biol 6(9): e1000898. doi:10

Pascual, Mercedes

167

Computing a Probability Distribution for the Start of the Rains from a Markov Chain Model for Precipitation  

Science Conference Proceedings (OSTI)

The start of the rains is defined to be the first day, or two-day rain spell, in which greater than a specified total amount of rain occurs. A method of calculating the probability distribution of the start of the rains from a Markov chain model ...

R. D. Stern

1982-03-01T23:59:59.000Z

168

Revealing the Winds Under the Rain. Part I. Passive Microwave Rain Retrievals Using a New, Observations-Based, Parameterization of Sub-Satellite Rain Variability and Intensity: Algorithm Description.  

Science Conference Proceedings (OSTI)

Scatterometer ocean surface winds have been providing very valuable information to researchers and operational weather forecasters for over ten years. However, the scatterometer wind retrievals are compromised when rain is present. Merely flagging ...

S. M. Hristova-Veleva; P. S. Callahan; R. S. Dunbar; B. W. Stiles; S. H. Yueh; J. N. Huddleston; S. V. Hsiao; G. Neumann; M. H. Freilich; B. A. Vanhoff; R. W. Gaston; E. Rodriguez; D. E. Weissman

169

Results of Seeding for Dynamic Effects on Rain-Cell Properties in FACE-2  

Science Conference Proceedings (OSTI)

Volume scan radar studies incorporating the use of an elaborate method of defining and tracking convective rain cells through their lifetime have been used to

Abraham Gagin; Daniel Rosenfeld; William L. Woodley; Raul E. Lopez

1986-01-01T23:59:59.000Z

170

Temporal and Spatial Variations of Freezing Rain in the Contiguous United States: 1948–2000  

Science Conference Proceedings (OSTI)

A new freezing-rain-days database was used to define the spatial and temporal distributions of freezing-rain days across the contiguous United States. The database contained 988 stations, spanning the period 1948–2000. Areas averaging one or more ...

Stanley A. Changnon; Thomas R. Karl

2003-09-01T23:59:59.000Z

171

Processes Influencing Rain-Field Growth and Decay after Tropical Cyclone Landfall in the United States  

Science Conference Proceedings (OSTI)

This study measured rain-field sizes for tropical cyclones (TCs) after U.S. landfall and related changes in size to the diurnal cycle and extratropical transition (ET). For 45 TC landfalls, the spatial properties of the rain fields were calculated ...

Corene J. Matyas

2013-05-01T23:59:59.000Z

172

Heavy Rain Events over the South-Facing Slopes of Hawaii: Attendant Conditions  

Science Conference Proceedings (OSTI)

Heavy rain events (>100 mm day?1) over the southeast flank of Mauna Loa volcano on the island of Hawaii are examined using surface, rawinsonde, rain gauge, and satellite data. The events occur in the presence of four types of synoptic-scale ...

Kevin Kodama; Gary M. Barnes

1997-06-01T23:59:59.000Z

173

Stratiform Rain in the Tropics as Seen by the TRMM Precipitation Radar  

Science Conference Proceedings (OSTI)

Across the Tropics (20°N–20°S), the Tropical Rainfall Measuring Mission (TRMM) Precipitation Radar (PR) indicates that for reflectivities ?17 dBZ, stratiform precipitation accounts for 73% of the area covered by rain and 40% of the total rain ...

Courtney Schumacher; Robert A. Houze Jr.

2003-06-01T23:59:59.000Z

174

Correcting Active Scatterometer Data for the Effects of Rain Using Passive Radiometer Data  

Science Conference Proceedings (OSTI)

A model for the effects of rain on scatterometer data is proposed. Data from the Advanced Microwave Scanning Radiometer (AMSR) and the SeaWinds scatterometer, both on the Midori-II satellite, are used. The model includes three basic rain effects: ...

K. A. Hilburn; F. J. Wentz; D. K. Smith; P. D. Ashcroft

2006-03-01T23:59:59.000Z

175

Properties of the Threshold Method on a Radar Rain Cluster Basis  

Science Conference Proceedings (OSTI)

The average rain rate R is estimated with radar data at the radar beam height by measuring the fractional area F(?) of pixels above a preset rain-rate threshold ?. This work applies the “threshold method” to smaller areas. The threshold method ...

L. Li; S. Sénési

1997-11-01T23:59:59.000Z

176

Assessing the Relative Performance of Microwave-Based Satellite Rain-Rate Retrievals Using TRMM Ground Validation Data  

Science Conference Proceedings (OSTI)

Spaceborne microwave sensors provide critical rain information used in several global multisatellite rain products, which in turn are used for a variety of important studies, including landslide forecasting, flash flood warning, data assimilation,...

David B. Wolff; Brad L. Fisher

2009-06-01T23:59:59.000Z

177

Non-Rayleigh Scattering Effect in Rain Observations by an X- and Ka-band Dual-Wavelength Radar  

Science Conference Proceedings (OSTI)

The effect of non-Rayleigh scattering appearing in a rain observation experiment using a dual-wavelength rain radar, is investigated. The non-Rayleigh scattering effect causes a small difference between the effective radar reflectivity factor and ...

Kenji Nakamura; Hideyuki Inomata

1991-06-01T23:59:59.000Z

178

ARM - Datastreams - pars2  

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

Datastreamspars2 Datastreamspars2 Documentation Data Quality Plots ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Datastream : PARS2 OTT Parsivel2 Laser Disdrometer Active Dates 2012.09.24 - 2013.09.26 Measurement Categories Atmospheric State, Cloud Properties Originating Instrument Laser Disdrometer (LDIS) Measurements Only measurements considered scientifically relevant are shown below by default. Show all measurements Measurement Units Variable Altitude above mean sea level m alt Base time in Epoch seconds since 1970-1-1 0:00:00 0:00 base_time Class size width mm class_size_width ( particle_size ) Diameter of largest drop observed mm diameter_max ( time ) Diameter of smallest drop observed mm diameter_min ( time )

179

ARM - Measurement - Horizontal wind  

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

govMeasurementsHorizontal wind govMeasurementsHorizontal wind ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Horizontal wind The horizontal wind in terms of either speed and direction, or the zonal (u) and meridional (v) components. Categories Atmospheric State Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments SONDE : Balloon-Borne Sounding System CO2FLX : Carbon Dioxide Flux Measurement Systems ECOR : Eddy Correlation Flux Measurement System DISDROMETER : Impact Disdrometer

180

ARM - Datastreams - vdis  

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

Datastreamsvdis Datastreamsvdis Documentation Data Quality Plots Citation DOI: 10.5439/1025315 [ What is this? ] Generate Citation ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Datastream : VDIS Video Disdrometer Drop Size Distribution Active Dates 2011.02.28 - 2013.12.30 Measurement Categories Atmospheric State, Cloud Properties Originating Instrument Video Disdrometer (VDIS) Measurements Only measurements considered scientifically relevant are shown below by default. Show all measurements Measurement Units Variable Altitude above mean sea level m alt Base time in Epoch seconds since 1970-1-1 0:00:00 0:00 base_time Diameter of largest drop observed mm diameter_max ( time ) Diameter of smallest drop observed mm diameter_min ( time )

Note: This page contains sample records for the topic "rain disdrometer disdrometer" 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.


181

ARM - Datastreams - vdisdrops  

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

Datastreamsvdisdrops Datastreamsvdisdrops Documentation Data Quality Plots Citation DOI: 10.5439/1025316 [ What is this? ] Generate Citation ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Datastream : VDISDROPS Video Disdrometer Individual Drop Data Active Dates 2011.02.28 - 2014.01.08 Measurement Categories Atmospheric State, Cloud Properties Originating Instrument Video Disdrometer (VDIS) Measurements Only measurements considered scientifically relevant are shown below by default. Show all measurements Measurement Units Variable Altitude above mean sea level m alt Instrument effective measurement area mm^2 area ( time ) Base time in Epoch seconds since 1970-1-1 0:00:00 0:00 base_time Hydrometeor Geometry

182

Experimental 4D-Var Assimilation of SYNOP Rain Gauge Data at ECMWF  

Science Conference Proceedings (OSTI)

Four-dimensional variational data assimilation (4D-Var) experiments with 6-hourly rain gauge accumulations observed at synoptic stations (SYNOP) around the globe have been run over several months, both at high resolution in an ECMWF operations-...

Philippe Lopez

2013-05-01T23:59:59.000Z

183

Australian Heavy-Rain Days and Associated East Coast Cyclones: 1958–92  

Science Conference Proceedings (OSTI)

The authors present a comprehensive climatology of heavy rain and east coast cyclones from January 1958 to September 1992. A total of 80 cyclones, including nondeveloping systems, were objectively identified from daily rainfall and surface wind ...

Linda C. Hopkins; Greg J. Holland

1997-04-01T23:59:59.000Z

184

Rain Enhancement and Fog Elimination by Seeding with Charged Droplets. Part I: Theory and Numerical Simulations  

Science Conference Proceedings (OSTI)

A new method of droplet collision acceleration, with the purpose of rain enhancement and fog elimination, is proposed. According to the method, some fraction of the droplets is taken from clouds (or fog) themselves, charged, and then injected ...

A. Khain; V. Arkhipov; M. Pinsky; Y. Feldman; Ya Ryabov

2004-10-01T23:59:59.000Z

185

Analysis of Short Space–Time-Scale Variability of Oceanic Rain Using TOPEX/Jason  

Science Conference Proceedings (OSTI)

Information on the spatial and temporal variability of rain rate is important not only for meteorology and hydrology but also for the design of remote sensing and in situ measuring or of millimeter wave communication systems. The Ocean Topography ...

J. Tournadre; S. Bhandari

2009-01-01T23:59:59.000Z

186

Infrared and Visible Satellite Rain Estimation. Part II: A Cloud Definition Approach  

Science Conference Proceedings (OSTI)

This study examines the relationships between satellite infrared clouds and rainfall, and infrared-threshold visible clouds and rainfall. Clouds are defined by the outline of the 253 K isotherm. Cloud infrared area was highly correlated with rain ...

Andrew J. Negri; Robert F. Adler

1987-11-01T23:59:59.000Z

187

A Physically Based, Nondimensional Parameter for Discriminating between Locations of Freezing Rain and Ice Pellets  

Science Conference Proceedings (OSTI)

A nondimensional parameter is presented that can he used to help distinguish between conditions favorable for the occurrence of freezing rain and ice pellets. The parameter was derived from the well-established condition that most incidents of ...

Robert R. Czys; Robert W. Scott; K. C. Tang; Ronald W. Przybylinski; Michael E. Sabones

1996-12-01T23:59:59.000Z

188

Satellite and Numerical Model Investigation of Two Heavy Rain Events over the Central Mediterranean  

Science Conference Proceedings (OSTI)

Two heavy rain events over the Central Mediterranean basin, which are markedly different by genesis, dimensions, duration, and intensity, are analyzed. Given the relative low frequency of this type of severe storms in the area, a synoptic analysis ...

Sante Laviola; Agata Moscatello; Mario Marcello Miglietta; Elsa Cattani; Vincenzo Levizzani

2011-08-01T23:59:59.000Z

189

Rain Shedding and Rainwater Runoff Tests on Cast Iron Vented Manhole Covers for Con Edison  

Science Conference Proceedings (OSTI)

This report documents work EPRIsolutions performed for Con Edison that compares water penetration characteristics of two types of vented manhole covers with a solid cover and a manhole with no cover under typical and very heavy rain conditions.

2007-11-21T23:59:59.000Z

190

Influence of Rain-Rate Initialization, Cloud Microphysics, and Cloud Torques on Hurricane Intensity  

Science Conference Proceedings (OSTI)

This study examines the impact of rain-rate initialization (RINIT), microphysical modifications, and cloud torques (in the context of angular momentum) on hurricane intensity forecasts using a mesoscale model [the Advanced Research Weather ...

S. Pattnaik; C. Inglish; T. N. Krishnamurti

2011-02-01T23:59:59.000Z

191

The Role of Giant and Ultragiant Aerosol Particles in Warm Rain Initiation  

Science Conference Proceedings (OSTI)

Giant and ultragiant aerosol particles can play an important role in warm rain initiation. Recent aerosol measurements have established that particles as large as 100 ?m are a regular part of the atmospheric aerosol. When ingested in growing ...

David B. Johnson

1982-02-01T23:59:59.000Z

192

Model Rain and Clouds over Oceans: Comparison with SSM/I Observations  

Science Conference Proceedings (OSTI)

A comparison of global model cloud and rain parameterization output with satellite observed radiances was carried out. Hydrometeor profiles from ECMWF operational short-range forecasts were combined with a microwave radiative transfer model to ...

Frédéric Chevallier; Peter Bauer

2003-07-01T23:59:59.000Z

193

An Investigation of the Consistency of TAO–TRITON Buoy-Mounted Capacitance Rain Gauges  

Science Conference Proceedings (OSTI)

The common use of remotely located, buoy-mounted capacitance rain gauges in the tropical oceans for satellite rainfall verification studies provides motivation for an in situ gauge bias assessment. A comparison of the biases in rainfall catchment ...

Mark L. Morrissey; Howard J. Diamond; Michael J. McPhaden; H. Paul Freitag; J. Scott Greene

2012-06-01T23:59:59.000Z

194

The Second-Moment Climatology of the GATE Rain Rate Data  

Science Conference Proceedings (OSTI)

The first part of this paper presents the description of the GARP (Global Atmospheric Research Program) Atlantic Tropical Experiment 1 rain-rate data and its two-dimensional spectral and correlation characteristics, which have made it possible to ...

Ilya Polyak; Gerald North

1995-04-01T23:59:59.000Z

195

High-Resolution Imaging of Rain Systems with the Advanced Microwave Precipitation Radiometer  

Science Conference Proceedings (OSTI)

An Advanced Microwave Precipitation Radiometer (AMPR) has been developed and flown in the NASA ER-2 high-altitude aircraft for imaging various atmospheric and surface processes, primarily the internal structure of rain clouds. The AMPR is a ...

Roy W. Spencer; Robbie E. Hood; Frank J. Lafontaine; Eric A. Smith; Robert Platt; Joe Galliano; Vanessa L. Griffin; Elena Lobl

1994-08-01T23:59:59.000Z

196

Improving Estimates of Heavy and Extreme Precipitation Using Daily Records from European Rain Gauges  

Science Conference Proceedings (OSTI)

The long-term variability in heavy precipitation characteristics over Europe for the period 1950–2000 is analyzed using high-quality daily records of rain gauge measurements from the European Climate Assessment (ECA) dataset. To improve the ...

Olga Zolina; Clemens Simmer; Konstantin Belyaev; Alice Kapala; Sergey Gulev

2009-06-01T23:59:59.000Z

197

Rain Attenuation of Radar Echoes Considering Finite-Range Resolution and Using Drop Size Distributions  

Science Conference Proceedings (OSTI)

The classical rain attenuation correction scheme of Hitschfeld and Bordan (HIBO) and the newer iterative approach by Hildebrand (HL) are reconsidered. Although the motivation for the HL algorithm was an extension into ranges, where HIBO tends to ...

Gerhard Peters; Bernd Fischer; Marco Clemens

2010-05-01T23:59:59.000Z

198

Real-Time Correction of Spatially Nonuniform Bias in Radar Rainfall Data Using Rain Gauge Measurements  

Science Conference Proceedings (OSTI)

A procedure for real-time correction of spatially nonuniform bias in radar rainfall data using rain gauge measurements is described. Developed to complement the existing gauge-based bias correction procedures used in the National Weather Service (...

Dong-Jun Seo; J. P. Breidenbach

2002-04-01T23:59:59.000Z

199

Evaluating Light Rain Drop Size Estimates from Multi-Wavelength Micropulse Lidar Network Profiling  

Science Conference Proceedings (OSTI)

We investigate multi-wavelength retrievals of median equivolumetric drop diameter, D0, suitable for drizzle and light rain, through collocated 355/527 nm Micro Pulse Lidar NETwork (MPLNET) observations collected during precipitation occurring 9 ...

Simone Lolli; Ellsworth J. Welton; James. R. Campbell

200

How Does Rain Affect Surface Pressure in a One-Dimensional Framework?  

Science Conference Proceedings (OSTI)

The process of hydrostatic adjustment in a vertical column is discussed in the context of rain formation and sedimentation. The authors assume an event of instantaneous condensation in a midatmospheric layer that removes mass from the gas phase ...

Thomas Spengler; Joseph Egger; Stephen T. Garner

2011-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "rain disdrometer disdrometer" 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.


201

Intercomparison of Rain Gauge, Radar, and Satellite-Based Precipitation Estimates with Emphasis on Hydrologic Forecasting  

Science Conference Proceedings (OSTI)

This study compares mean areal precipitation (MAP) estimates derived from three sources: an operational rain gauge network (MAPG), a radar/gauge multisensor product (MAPX), and the Precipitation Estimation from Remotely Sensed Information using ...

Koray K. Yilmaz; Terri S. Hogue; Kuo-lin Hsu; Soroosh Sorooshian; Hoshin V. Gupta; Thorsten Wagener

2005-08-01T23:59:59.000Z

202

Uncertainties in Oceanic Radar Rain Maps at Kwajalein and Implications for Satellite Validation  

Science Conference Proceedings (OSTI)

The Kwajalein, Marshall Islands, Tropical Rainfall Measuring Mission (TRMM) ground validation radar has provided a multiyear three-dimensional radar dataset at an oceanic site. Extensive rain gauge networks are not feasible over the ocean and, ...

Robert A. Houze Jr; Stacy Brodzik; Courtney Schumacher; Sandra E. Yuter; Christopher R. Williams

2004-08-01T23:59:59.000Z

203

Climatologically Tuned Reflectivity-Rain Rate Relations and Links to Area-Time Integrals  

Science Conference Proceedings (OSTI)

Relations between either the point- or beam-averaged effective reflectivity, Ze, and surface rain rate, R, are determined by a probability matching method similar to that of Calheiros and Zawadzki, and Rosenfeld. The cumulative density functions (...

David Atlas; Daniel Rosenfeld; David B. Wolff

1990-11-01T23:59:59.000Z

204

A Remote-Sensing View of a Freezing-Rain Storm  

Science Conference Proceedings (OSTI)

A destructive freezing-rain storm on 15 February 1990 was observed intensively with advanced ground-based remote sensors and conventional instruments by the Lake Ontario Winter Storms (LOWS) project in upstate New York. A deep layer of warm, ...

Brooks E. Martner; Jack B. Snider; Robert J. Zamora; Gregory P. Byrd; Thomas A. Niziol; Paul I. Joe

1993-09-01T23:59:59.000Z

205

Analyses of 1-min Rain Rates Extracted from Weighing Raingage Recordings  

Science Conference Proceedings (OSTI)

A method for extracting 1-min rain rates from original weighing raingage recordings is described. The method allows the retrieval of rates for long periods at approximately 300 United States weather stations. The process combines magnification of ...

Paul Tattelman; Richard W. Knight

1988-08-01T23:59:59.000Z

206

Monsoon variation and vegetative drought patterns in the Luni Basin in the rain-shadow zone  

Science Conference Proceedings (OSTI)

Drought has a significant impact on agricultural, ecological and socio-economic spheres. Poor and delayed monsoon, high temperature and insufficient water resources lead to recurrent drought in the Luni River basin located in the rain-shadow zone of ...

C. Bhuiyan; F. N. Kogan

2010-04-01T23:59:59.000Z

207

Intercalibrated Passive Microwave Rain Products from the Unified Microwave Ocean Retrieval Algorithm (UMORA)  

Science Conference Proceedings (OSTI)

The Unified Microwave Ocean Retrieval Algorithm (UMORA) simultaneously retrieves sea surface temperature, surface wind speed, columnar water vapor, columnar cloud water, and surface rain rate from a variety of passive microwave radiometers ...

K. A. Hilburn; F. J. Wentz

2008-03-01T23:59:59.000Z

208

Regional and Local Influences on Freezing Drizzle, Freezing Rain,and Ice Pellet Events  

Science Conference Proceedings (OSTI)

Regional and local influences on frequency and type of freezing precipitation (freezing drizzle, freezing rain, and ice pellets) are investigated via in-depth climatologies of six continental United States (CONUS) sounding sites. For each site, ...

Ben C. Bernstein

2000-10-01T23:59:59.000Z

209

Can a Descending Rain Curtain in a Supercell Instigate Tornadogenesis Barotropically?  

Science Conference Proceedings (OSTI)

This paper investigates whether the descending rain curtain associated with the hook echo of a supercell can instigate a tornado through a purely barotropic mechanism. A simple numerical model of a mesocyclone is constructed in order to rule out ...

Robert Davies-Jones

2008-08-01T23:59:59.000Z

210

Rain-Related Impacts on Selected Transportation Activities and Utility Services in the Chicago Area  

Science Conference Proceedings (OSTI)

An intensive meteorological study of summer precipitation in the Chicago area during 1976–78 furnished detailed data needed to perform a study of the impacts of rain on selected transportation-related activities and on certain utility services. ...

Jan Bertness

1980-05-01T23:59:59.000Z

211

A Climatology of Freezing Rain in the Great Lakes Region of North America  

Science Conference Proceedings (OSTI)

A 15-yr climatology of freezing rain surrounding the Great Lakes region of North America has been constructed using data from rawinsondes, surface stations, and gridded reanalyses from the National Centers for Environmental Prediction. This ...

John Cortinas Jr.

2000-10-01T23:59:59.000Z

212

A Numerical Study of the Warm Rain Process in Orographic Clouds  

Science Conference Proceedings (OSTI)

A technique for numerical simulation of a stationary, two-dimensional laminar flow process is described. Based on this technique, a model for warm rain microphysics in an orographic cloud was developed. The model includes condensation, ...

Naihui Song; John Marwitz

1989-11-01T23:59:59.000Z

213

Intrinsic Ambiguities in the Retrieval of Rain Rates from Radar Returns at Attenuating Wavelengths  

Science Conference Proceedings (OSTI)

It is well known that there are significant deterministic ambiguities inherent in trying to determine the particular rain-rate profile that produced some given sequence of air- or spaceborne radar echo powers at a single attenuating frequency. ...

Ziad S. Haddad; Eastwood Im; Stephen L. Durden

1995-12-01T23:59:59.000Z

214

Convective Rain Rates and their Evolution during Storms in a Semiarid Climate  

Science Conference Proceedings (OSTI)

Rain rates and their evolution during summertime convective storms were analyzed for the semiarid climate of the northern High Plains. Radar data from a total of 750 radar echo clusters from the 1980 and 1981 summer cloud seeding operations of ...

AndréA. Doneaud; Stefano Ionescu-Niscov; James R. Miller Jr.

1984-08-01T23:59:59.000Z

215

The Role of Visible Data in Improving Satellite Rain-Rate Estimates  

Science Conference Proceedings (OSTI)

Data from the first Algorithm Intercomparison Project(AIP/1) collected over Japan and surrounding waters in June, July, and August 1989 are used in this study to assess the importance of visible data in satellite rain estimation techniques. The ...

Patrick W. S. King; William D. Hogg; Philip A. Arkin

1995-07-01T23:59:59.000Z

216

Use of Numerical Forecasts for Improving TMI Rain Retrievals over the Mountainous Area in Korea  

Science Conference Proceedings (OSTI)

Topographical influences on the Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI) rain retrievals over the terrain area of the Korean peninsula were examined using a training dataset constructed from numerical mesoscale model ...

Eun-Han Kwon; Byung-Ju Sohn; Dong-Eon Chang; Myoung-Hwan Ahn; Song Yang

2008-07-01T23:59:59.000Z

217

Rain Retrieval from TMI Brightness Temperature Measurements Using a TRMM PR–Based Database  

Science Conference Proceedings (OSTI)

This study focuses on improving the retrieval of rain from measured microwave brightness temperatures and the capability of the retrieved field to represent the mesoscale structure of a small intense hurricane. For this study, a database is ...

Nicolas Viltard; Corinne Burlaud; Christian D. Kummerow

2006-03-01T23:59:59.000Z

218

Allowance trading activity and state regulatory rulings : evidence from the U.S. Acid Rain Program  

E-Print Network (OSTI)

The U.S. Acid Rain Program is one of the first, and by far the most extensive, applications of a market based approach to pollution control. From the beginning, there has been concern whether utilities would participate ...

Bailey, Elizabeth M.

1996-01-01T23:59:59.000Z

219

Allowance trading activity and state regulatory rulings : evidence from the U.S. Acid Rain Program  

E-Print Network (OSTI)

The U.S. Acid Rain Program is one of the first, and by far the most extensive, applications of a market based approach to pollution control. From the beginning, there has been concern whether utilities would participate ...

Bailey, Elizabeth M.

1998-01-01T23:59:59.000Z

220

An Examination of Radar and Rain Gauge–Derived Mean Areal Precipitation over Georgia Watersheds  

Science Conference Proceedings (OSTI)

Compared to conventional rain gauge networks, the Weather Surveillance Radar-1988 Doppler provides precipitation estimates at enhanced spatial and temporal resolution that River Forecast Centers can use to improve streamflow forecasts. This study ...

Keith M. Stellman; Henry E. Fuelberg; Reggina Garza; Mary Mullusky

2001-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "rain disdrometer disdrometer" 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.


221

Doppler Polarimetric Radar Measurements of the Gamma Drop Size Distribution of Rain  

Science Conference Proceedings (OSTI)

The conversion of radar reflections into rain intensities is dependent upon assumptions regarding the drop size distribution. The gamma drop size distribution contains three unknown parameters; the number of parameters that can be obtained ...

H. W. J. Russchenberg

1993-12-01T23:59:59.000Z

222

Nimbus-7 37 GHz Radiances Correlated with Radar Rain Rates over the Gulf of Mexico  

Science Conference Proceedings (OSTI)

In a comparison between 37 GHz brightness temperatures from the Nimbus 7 Scanning Multichannel Microwave Radiometer and rain rates derived from the WSR-57 radars at Galveston, Texas and Apalachicola, Florida, it was found that the brightness ...

Roy W. Spencer; Barry B. Hinton; William S. Olson

1983-12-01T23:59:59.000Z

223

Correction of Polarimetric Radar Reflectivity Measurements and Rainfall Estimates for Apparent Vertical Profile in Stratiform Rain  

Science Conference Proceedings (OSTI)

A method for correcting the vertical profile of reflectivity measurements and rainfall estimates (VPR) in plan position indicator (PPI) scans of polarimetric weather radars in the melting layer and the snow layer during stratiform rain is ...

John Kalogiros; Marios N. Anagnostou; Emmanouil N. Anagnostou; Mario Montopoli; Errico Picciotti; Frank S. Marzano

2013-05-01T23:59:59.000Z

224

Climatological Characterization of Three-Dimensional Storm Structure from Operational Radar and Rain Gauge Data  

Science Conference Proceedings (OSTI)

Three algorithms extract information on precipitation type, structure, and amount from operational radar and rain gauge data. Tests on one month of data from one site show that the algorithms perform accurately and provide products that ...

Matthias Steiner; Robert A. Houze Jr.; Sandra E. Yuter

1995-09-01T23:59:59.000Z

225

Probabilistic Parameterizations of Visibility Using Observations of Rain Precipitation Rate, Relative Humidity, and Visibility  

Science Conference Proceedings (OSTI)

This study analyzes the occurrence of the visibility (Vis) versus precipitation rates (PR) for rain and versus relative humidity (RH) from surface observations that were collected during the Fog Remote Sensing and Modeling (FRAM) field project, ...

I. Gultepe; J. A. Milbrandt

2010-01-01T23:59:59.000Z

226

General Probability-matched Relations between Radar Reflectivity and Rain Rate  

Science Conference Proceedings (OSTI)

A method of deriving the relation between radar-observed reflectivities Ze and gauge-measured rain intensity, R is presented. It is based on matching the probabilities of the two variables. The observed reflectivity is often very different from ...

Daniel Rosenfeld; David B. Wolff; David Atlas

1993-01-01T23:59:59.000Z

227

Bayesian Retrieval of Complete Posterior PDFs of Oceanic Rain Rate from Microwave Observations  

Science Conference Proceedings (OSTI)

A new Bayesian algorithm for retrieving surface rain rate from Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI) over the ocean is presented, along with validations against estimates from the TRMM Precipitation Radar (PR). The ...

J. Christine Chiu; Grant W. Petty

2006-08-01T23:59:59.000Z

228

Data Transformation and Uncertainty in Geostatistical Combination of Radar and Rain Gauges  

Science Conference Proceedings (OSTI)

Geostatistics provides a popular framework for deriving high-resolution quantitative precipitation estimates (QPE) by combining radar and rain gauge data. However, the skewed and heteroscedastic nature of precipitation is in contradiction to ...

Rebekka Erdin; Christoph Frei; Hans R. Künsch

2012-08-01T23:59:59.000Z

229

An Automated Synoptic Typing Procedure to Predict Freezing Rain: An Application to Ottawa, Ontario, Canada  

Science Conference Proceedings (OSTI)

Freezing rain is a major weather hazard that can compromise human safety, significantly disrupt transportation, and damage and disrupt built infrastructure such as telecommunication towers and electrical transmission and distribution lines. In ...

Chad Shouquan Cheng; Heather Auld; Guilong Li; Joan Klaassen; Bryan Tugwood; Qian Li

2004-08-01T23:59:59.000Z

230

Synoptic-Scale Analysis of Freezing Rain Events in Montreal, Quebec, Canada  

Science Conference Proceedings (OSTI)

Freezing rain is a major environmental hazard that is especially common along the St. Lawrence River valley (SLRV) in southern Quebec, Canada. For large cities such as Montreal, severe events can have a devastating effect on people, property, and ...

Gina M. Ressler; Shawn M. Milrad; Eyad H. Atallah; John R. Gyakum

2012-04-01T23:59:59.000Z

231

Satellite Cloud Classification and Rain-Rate Estimation Using Multispectral Radiances and Measures of Spatial Texture  

Science Conference Proceedings (OSTI)

Twelve months of Southern Hemisphere (maritime) midlatitudes Advanced Very High Resolution Radiometer local area coverage data at full radiometric and spatial resolution have been collocated with rain-rate data from three Doppler weather radars.

Michael J. Uddstrom; Warren R. Gray

1996-06-01T23:59:59.000Z

232

Sensitivity of WSR-88D Rainfall Estimates to the Rain-Rate Threshold and Rain Gauge Adjustment: A Flash Flood Case Study  

Science Conference Proceedings (OSTI)

A strong thunderstorm produced a flash flood on the evening of 12 July 1996 in Buffalo Creek, Colorado, that caused two deaths and significant property damage. Most of the rain fell in a 1-h time period from 2000 to 2100 MDT. The performance of ...

Richard A. Fulton

1999-10-01T23:59:59.000Z

233

Photo of the Week: Rain or Shine, Preparing for the 2013 Hurricane Season |  

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

Rain or Shine, Preparing for the 2013 Hurricane Rain or Shine, Preparing for the 2013 Hurricane Season Photo of the Week: Rain or Shine, Preparing for the 2013 Hurricane Season May 15, 2013 - 1:16pm Addthis President Barack Obama listens to Acting Energy Secretary Daniel B. Poneman during a meeting with electric utility CEOs and trade association representatives at the Department of Energy in Washington, D.C., May 8, 2013. The group met to discuss lessons learned during the response to Hurricane Sandy, as well as the ongoing preparations for 2013 hurricane season, which begins June 1. | Official White House Photo by Pete Souza. President Barack Obama listens to Acting Energy Secretary Daniel B. Poneman during a meeting with electric utility CEOs and trade association representatives at the Department of Energy in Washington, D.C., May 8,

234

Watch Out for the Snakes! 21 Biologists and one Physicist in a Rain Forest  

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

Watch Out for the Snakes! 21 Biologists and one Physicist in a Rain Forest Watch Out for the Snakes! 21 Biologists and one Physicist in a Rain Forest in Nicaragua Speaker(s): Donald Grether Date: June 29, 2007 - 12:00pm Location: 90-3122 Don, his wife Becky, and their granddaughter Briana recently returned from spending almost three weeks at a field station in a rain forest in Nicaragua, along with UCLA faculty members, graduate students, and undergraduates. Our location was way off the beaten track, even for "eco-tourists", and could only be reached by a three-hour boat trip on Rio San Juan. No hot water or space heating or cooling, running water most but not all of the time, no electricity in our rooms, no windows, and no Internet. Sort of like a near-zero energy building. Don's presentation will include photos that give some sense of why we went, what it took to

235

APRIL 2006 F A LKOVICH ET AL. 591 Rain Initiation Time in Turbulent Warm Clouds  

E-Print Network (OSTI)

A mean field model is presented that describes droplet growth resulting from condensation and collisions and droplet loss resulting from fallout. The model allows for an effective numerical simulation. The numerical scheme that is conservative in water mass and keeps accurate count of the number of droplets is applied, and the way in which the rain initiation time depends on different parameters is studied. In particular, it is shown that the rain initiation time depends nonmonotonically (has a minimum) on the number of cloud condensation nuclei. Also presented is a simple model that allows one to estimate the rain initiation time for turbulent clouds with an inhomogeneous concentration of cloud condensation nuclei. It is argued that by overseeding even a part of a cloud by small hygroscopic nuclei one can substantially delay the onset of precipitation. 1.

Gregory Falkovich; Mikhail; G. Stepanov

2004-01-01T23:59:59.000Z

236

Macroeconomic impacts of clean coal technologies and acid rain legislation: A comparative analysis  

SciTech Connect

In 1987, the National Association of Manufacturers published a study documenting the negative macroeconomic impacts that could occur if proposed acid rain legislation were passed (NAM 1987). These negative impacts would result from the substantially higher electricity rates that would be needed to finance conventional pollution-control retrofits. The US Department of Energy's Office of Fossil Energy (DOE/FE) wanted to evaluate the macroeconomic impacts of nonregulatory approaches to reduce the emissions of acid rain precursors. DOE/FE therefore directed Argonne National Laboratory (ANL) to determine the potential for clean coal technologies (CCTs) to satisfy future electric load growth and achieve greater long-term reductions in emissions at a lower cost than could be achieved through a legislative mandate. This study documents the macroeconomic impacts of CCT deployment without acid rain legislation and compares these results with the corresponding impacts of using conventional technologies and meeting mandatory emission reductions. The Argonne Utility Simulation (ARGUS) model was used to determine the least-cost solution and incremental levelized system costs* over the period 1995-2030 for three scenarios: (1) a baseline scenario, in which no acid rain controls are mandated and no CCTs are deployed; (2) an acid rain (AR) scenario, in which legislation (S. 1894, 100th Congress) is mandated but no CCTs are deployed; and (3) a CCT scenario, in which maximum CCT deployment (specifically, integrated gasification combined-cycle or IGCC technology in repowering and new or greenfield'' applications) occurs but no acid rain legislation is mandated. The Data Resources Inc. (DRI) annual macroeconomic model (which was extended from 2010 to 2030) was used to compute the macroeconomic impacts of the AR and CCT scenarios. 2 refs., 28 figs.

Edwards, B.K.; South, D.W.; Veselka, T.D. (Argonne National Lab., IL (USA). Environmental Assessment and Information Sciences Div.); Gault, N.J. (DRI/McGraw-Hill Energy Service, Lexington, MA (USA))

1989-06-01T23:59:59.000Z

237

Frequency of Heavy Rainstorms on Areas from 10 to 10 000 km2, Defined Using Dense Rain Gauge Networks  

Science Conference Proceedings (OSTI)

Operation in Illinois of eight dense rain gauge networks of varying sizes, with each operating for 5–22 yr, provided data used to assess the temporal frequency of very heavy rain events on small- to moderate-sized areas. Initial testing reveals ...

Stanley A. Changnon

2002-04-01T23:59:59.000Z

238

Validation of the Rain Profiling Algorithm “ZPHI” from the C-Band Polarimetric Weather Radar in Darwin  

Science Conference Proceedings (OSTI)

An extensive application of a rain profiling algorithm (ZPHI) employing a C-band polarimetric radar (the C-POL radar of the Australian Bureau of Meteorology Research Centre in Darwin) is presented. ZPHI belongs to the class of rain profiling ...

Erwan Le Bouar; Jacques Testud; Tom D. Keenan

2001-11-01T23:59:59.000Z

239

An Approach to Estimate the Areal Rain-Rate Distribution from Spaceborne Radar by the Use of Multiple Thresholds  

Science Conference Proceedings (OSTI)

Estimates of rain rate derived from a spaceborne weather radar will be most reliable over an intermediate range of values. At light or heavy rain rates, where the signal-to-noise ratios are degraded either by small values of the backscattered ...

R. Meneghini; J. A. Jones

1993-02-01T23:59:59.000Z

240

A Comparison of NEXRAD WSR-88D Radar Estimates of Rain Accumulation with Gauge Measurements for High- and Low-Reflectivity Horizontal Gradient Precipitation Events  

Science Conference Proceedings (OSTI)

Radar-estimated rainfall amounts from the NEXRAD Weather Surveillance Radar precipitation accumulation algorithm were compared with measurements from numerous rain gauges (1639 radar versus gauge comparisons). Storm total rain accumulations from ...

Gerard E. Klazura; Jessica M. Thomale; D. Scott Kelly; Paul Jendrowski

1999-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "rain disdrometer disdrometer" 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.


241

Dynamics and Prediction of a Mesoscale Extreme Rain Event in the Baiu Front over Kyushu, Japan  

Science Conference Proceedings (OSTI)

A high-resolution version of the limited-area primitive equations model of the Bureau of Meteorology Research Centre is used to investigate the dynamics and prediction of the mesoscale, extreme rain event of 1 August 1993 over Kyushu. The model ...

Noel E. Davidson; Kazuo Kurihara; Teruyuki Kato; Graham Mills; Kamal Puri

1998-06-01T23:59:59.000Z

242

The Heavy Rain Event of 29 October 2000 in Hana, Maui  

Science Conference Proceedings (OSTI)

On 29 October 2000, the Hana region of Maui received 700 mm of rain in 7 h. Radar analyses revealed that the storm consisted of seven cells that were initiated along the southeast slope of Haleakala volcano. One of these cells survived for nearly ...

Ryan E. Lyman; Thomas A. Schroeder; Gary M. Barnes

2005-08-01T23:59:59.000Z

243

Measurements of the Transmission Loss of a Radome at Different Rain Intensities  

Science Conference Proceedings (OSTI)

Results on the transmission loss of a dry and a wet C-band weather radar radome at different rain intensities are presented. Two methods were used in the study, both carried out under laboratory conditions. In the first method, the complex ...

Mikko Kurri; Asko Huuskonen

2008-09-01T23:59:59.000Z

244

Torrential Rains on the Spanish Mediterranean Coast: Modeling the Effects of the Sea Surface Temperature  

Science Conference Proceedings (OSTI)

Torrential rains are a frequent meteorological risk in the Mediterranean Basin, and the work reported here is part of a long-term study that includes the analysis of the synoptic conditions involved in their genesis. This paper studies the role ...

Francisco Pastor; MarÍa J. Estrela; David Peñarrocha; Millán M. Millán

2001-07-01T23:59:59.000Z

245

Comparison of Bulk and Bin Warm-Rain Microphysics Models Using a Kinematic Framework  

Science Conference Proceedings (OSTI)

This paper discusses the development and testing of a bulk warm-rain microphysics model that is capable of addressing the impact of atmospheric aerosols on ice-free clouds. Similarly to previous two-moment bulk schemes, this model predicts the ...

Hugh Morrison; Wojciech W. Grabowski

2007-08-01T23:59:59.000Z

246

Polarimetric Estimates of a 1-Month Accumulation of Light Rain with a 3-cm Wavelength Radar  

Science Conference Proceedings (OSTI)

The authors evaluate rainfall estimates from the new polarimetric X-band radar at Bonn, Germany, for a period between mid-November and the end of December 2009 by comparison with rain gauges. The emphasis is on slightly more than 1-month ...

L. Borowska; D. Zrni?; A. Ryzhkov; P. Zhang; C. Simmer

2011-10-01T23:59:59.000Z

247

The Ground-Truth Problem for Satellite Estimates of Rain Rate  

Science Conference Proceedings (OSTI)

In this paper a scheme is proposed to use a point raingage to compare contemporaneous measurements of rain rate from a single-field-of-view estimate based on a satellite remote sensor such as a microwave radiometer. Even in the ideal case the ...

Gerald R. North; Juan B. Valdés; Eunho Ha; Samuel S. P. Shen

1994-08-01T23:59:59.000Z

248

Measurements of 7Be and 210Pb in Rain, Snow, and Hail  

Science Conference Proceedings (OSTI)

Measurements of the levels of 7Be and 210Pb are reported for rain, snow, and hail samples taken at Argonne, Illinois, and Socorro, New Mexico. These natural radioisotopes are indicators of the sources of the aerosols contributing materials to the ...

Jeffrey S. Gaffney; Kent A. Orlandini; Nancy A. Marley; Carl J. Popp

1994-07-01T23:59:59.000Z

249

Long-Lasting Trade-Wind Rain Showers in a Three-Dimensional Model  

Science Conference Proceedings (OSTI)

A three-dimensional warm rain model that included microphysics was used to study the reasons for ease of rainfall in Hawaiian clouds and the long-lasting rainfall from certain rainbands. It was found that drop recirculation occurs within these ...

Tsutomu Takahashi

1988-11-01T23:59:59.000Z

250

Local and Synoptic Environments Associated with Freezing Rain in the Contiguous United States  

Science Conference Proceedings (OSTI)

Local and synoptic conditions associated with freezing-rain events in the continental United States, as well as the temporal and spatial variability of these conditions, have been documented for the period 1976–90. It had been postulated that the ...

Chris C. Robbins; John V. Cortinas Jr.

2002-02-01T23:59:59.000Z

251

Climatology of Heavy Rain Events in the United States from Hourly Precipitation Observations  

Science Conference Proceedings (OSTI)

Flash flooding is frequently associated with heavy precipitation (defined here as ?1 in. h?1) occurring over a short period of time. To begin a study of flash flood–producing rain events, the Hourly Precipitation Dataset (HPD) is used to develop ...

Harold E. Brooks; David J. Stensrud

2000-04-01T23:59:59.000Z

252

Heavy Rains and Flooding in Montana: A Case for Operational Use of Symmetric Instability Diagnosis  

Science Conference Proceedings (OSTI)

A strongly developing cyclone east of the Rockies moved northward along the Montana/North Dakota border between 24–26 September 1986 and deposited over 1 in. of rain throughout much of eastern Montana. Included in this area of precipitation was ...

Glenn R. Lussky

1989-06-01T23:59:59.000Z

253

Study of a Heavy Rain Vortex Formed over the Eastern Flank of the Tibetan Plateau  

Science Conference Proceedings (OSTI)

A case of the heavy rain vortex which occurred during the period 14–15 July 1979 is studied using a limited-area mesoscale numerical model. This is a representative example of a group of warm southwest vortices that often form over the eastern ...

Bin Wang; Isidoro Orlanski

1987-07-01T23:59:59.000Z

254

Soil Thermal and Ecological Impacts of Rain on Snow Events in the Circumpolar Arctic  

Science Conference Proceedings (OSTI)

Rain on snow (ROS) events are rare in most parts of the circumpolar Arctic, but have been shown to have great impact on soil surface temperatures and serve as triggers for avalanches in the midlatitudes, and they have been implicated in ...

Kevin J. Rennert; Gerard Roe; Jaakko Putkonen; Cecilia M. Bitz

2009-05-01T23:59:59.000Z

255

The combined effect of rain and wind on airwater gas exchange: A feasibility study  

E-Print Network (OSTI)

rights reserved. 1. Introduction Air­water gas exchange is an important process on local, regional, and cycling of biogeochemically important trace gases. Gas exchange for slightly soluble gases is thought of the reduction. In order to examine the systematic effects of rain and wind on gas exchange in the natural

Ho, David

256

Synoptic and Mesoscale Structure of a Severe Freezing Rain Event: The St. Valentine's Day Ice Storm  

Science Conference Proceedings (OSTI)

A severe freezing rainstorm produced as much as 4.5 cm of freezing rain during an 18-h period at Champaign, Illinois, on 14–15 February 1990, resulting in over $12 million in damage, week-long power outages, and a federal disaster declaration. ...

Robert M. Rauber; Mohan K. Ramamurthy; Ali Tokay

1994-06-01T23:59:59.000Z

257

Organization and Environmental Properties of Extreme-Rain-Producing Mesoscale Convective Systems  

Science Conference Proceedings (OSTI)

This study examines the radar-indicated structures and other features of extreme rain events in the United States over a 3-yr period. A rainfall event is defined as “extreme” when the 24-h precipitation total at one or more stations surpasses the ...

Russ S. Schumacher; Richard H. Johnson

2005-04-01T23:59:59.000Z

258

Proposal for a Spaceborne Dual-Beam Rain Radar with Doppler Capability  

Science Conference Proceedings (OSTI)

The potential characteristics and performances of a spaceborne dual-beam radar (or stereo radar) operating at 24 GHz, and devoted primarily to the retrieval of rain-rate structure by using the stereo-radar analysis, were presented in a previous ...

Paul Amayenc; Jacques Testud; Mongi Marzoug

1993-06-01T23:59:59.000Z

259

Electric Utility Phase I Acid Rain Compliance Strategies for the Clean Air Act Amendments of 1990  

Reports and Publications (EIA)

The Acid Rain Program is divided into two time periods; Phase I, from 1995 through 1999, and Phase II, starting in 2000. Phase I mostly affects power plants that are the largest sources of SO2 and NOx . Phase II affects virtually all electric power producers, including utilities and nonutilities. This report is a study of the effects of compliance with Phase I regulations on the costs and operations of electric utilities, but does not address any Phase II impacts.

Information Center

1994-03-01T23:59:59.000Z

260

Further Experiments on the Effect of Tropical Atlantic Heating Anomalies upon GCM Rain Forecasts over the Americas  

Science Conference Proceedings (OSTI)

A series of real-data experiments is performed with a general circulation model to study the sensitivity of extended range rain forecasts over the Americas to the structure and magnitude of tropical beating anomalies. The emphasis is upon heat ...

Julio Buchmann; Lawrence E. Buja; Jan Paegle; Robert E. Dickinson

1995-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "rain disdrometer disdrometer" 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

Correction of the High-Latitude Rain Day Anomaly in the NCEP–NCAR Reanalysis for Land Surface Hydrological Modeling  

Science Conference Proceedings (OSTI)

A spurious wavelike pattern in the monthly rain day statistics exists within the National Centers for Environmental Prediction–National Center for Atmospheric Research (NCEP–NCAR) reanalysis precipitation product. The anomaly, which is an ...

Justin Sheffield; Alan D. Ziegler; Eric F. Wood; Yangbo Chen

2004-10-01T23:59:59.000Z

262

Correction of Drop Shape-Induced Errors on Rain Rates Derived from Radar-Measured Doppler Spectra at Vertical Incidence  

Science Conference Proceedings (OSTI)

The shape of larger raindrops shows a deviation from spheres. This leads to a radar backscatter cross section different from the Rayleigh cross section. The drop shape-induced error for deducing rain rates is calculated. The resulting correction ...

Dirk Klugmann; Carolin Richter

1995-06-01T23:59:59.000Z

263

Analysis of 2002 and 2003 Warm-Season Precipitation from the North American Monsoon Experiment Event Rain Gauge Network  

Science Conference Proceedings (OSTI)

Analyses of rainfall characteristics and their linkage to physiographic features are made from the North American monsoon experiment (NAME) Event Rain Gauge Network (NERN) in northwest Mexico. The findings are based on the network configuration ...

David J. Gochis; Alejandro Jimenez; Christopher J. Watts; Jaime Garatuza-Payan; W. James Shuttleworth

2004-12-01T23:59:59.000Z

264

APHRODITE: Constructing a Long-Term Daily Gridded Precipitation Dataset for Asia Based on a Dense Network of Rain Gauges  

Science Conference Proceedings (OSTI)

A daily gridded precipitation dataset covering a period of more than 57 yr was created by collecting and analyzing rain gauge observation data across Asia through the activities of the Asian Precipitation—Highly Resolved Observational Data Integration ...

Akiyo Yatagai; Kenji Kamiguchi; Osamu Arakawa; Atsushi Hamada; Natsuko Yasutomi; Akio Kitoh

2012-09-01T23:59:59.000Z

265

Intercomparison of Single-Frequency Methods for Retrieving a Vertical Rain Profile from Airborne or Spaceborne Radar Data  

Science Conference Proceedings (OSTI)

This paper briefly reviews several single-frequency rain profiling methods for an airborne or spaceborne radar. The authors describe the different methods from a unified point of view starting from the basic differential equation. This ...

Toshio Iguchi; Robert Meneghini

1994-12-01T23:59:59.000Z

266

On the Differences in Storm Rainfall from Hurricanes Isidore and Lili. Part I: Satellite Observations and Rain Potential  

Science Conference Proceedings (OSTI)

It has been well known for years that the heavy rain and flooding of tropical cyclones over land bear a weak relationship to the maximum wind intensity. The rainfall accumulation history and rainfall potential history of two North Atlantic ...

Haiyan Jiang; Jeffrey B. Halverson; Joanne Simpson

2008-02-01T23:59:59.000Z

267

The Improved AMSU Rain-Rate Algorithm and Its Evaluation for a Cool Season Event in the Western United States  

Science Conference Proceedings (OSTI)

Rain-rate retrievals from passive microwave sensors are useful for a number of applications related to weather forecasting. For example, in the United States, such estimates are useful for offshore rainfall systems approaching land and in regions ...

Shuang Qiu; Paul Pellegrino; Ralph Ferraro; Limin Zhao

2005-10-01T23:59:59.000Z

268

A Robust Error-Based Rain Estimation Method for Polarimetric Radar. Part I: Development of a Method  

Science Conference Proceedings (OSTI)

The algorithms used to estimate rainfall from polarimetric radar variables show significant variance in error characteristics over the range of naturally occurring rain rates. As a consequence, to improve rainfall estimation accuracy using ...

Acacia S. Pepler; Peter T. May; Merhala Thurai

2011-10-01T23:59:59.000Z

269

Diagnosis of the Warm Rain Process in Cloud-Resolving Models Using Joint CloudSat and MODIS Observations  

Science Conference Proceedings (OSTI)

This study examines the warm rain formation process in global and regional cloud-resolving models. Methodologies developed to analyze CloudSat and Moderate Resolution Imaging Spectroradiometer (MODIS) satellite observations are employed to ...

Kentaroh Suzuki; Graeme L. Stephens; Susan C. van den Heever; Takashi Y. Nakajima

2011-11-01T23:59:59.000Z

270

An Observational Study of the Relationship between Excessively Strong Short Rains in Coastal East Africa and Indian Ocean SST  

Science Conference Proceedings (OSTI)

Composites of SST, wind, rainfall, and humidity have been constructed for years of high rainfall during September, October, and November (SON) in equatorial and southern-central East Africa. These show that extreme East African short rains are ...

Emily Black; Julia Slingo; Kenneth R. Sperber

2003-01-01T23:59:59.000Z

271

Relationships between Radar Properties at High Elevations and Surface Rain Rate: Potential Use for Spaceborne Rainfall Measurements  

Science Conference Proceedings (OSTI)

Ground-based radar data have been used to investigate the relationship between reflectivity at high elevations and surface rain rates. Such relations are useful for rainfall measurements by spaceborne radars at attenuating wavelength such as the ...

Eyal Amitai

1999-03-01T23:59:59.000Z

272

Application of an Apple-II Computer in Real-Time Data Processing of Microwave Radiation Attenuation by Rain  

Science Conference Proceedings (OSTI)

Using an Apple-II microcomputer, real-time data acquisition, processing, staring and display of 12 GHz microwave radiation attenuation by rain have been implemented. The computer-radiometer interface consists of an address decoder, two three-...

Song Qian

1989-02-01T23:59:59.000Z

273

Characteristics of the Vertical Profiles of Dual-Frequency, Dual-Polarization Radar Data in Stratiform Rain  

Science Conference Proceedings (OSTI)

Airborne dual-wavelength and dual-polarization radar data are analyzed for measurements taken in stratiform rain in the western Pacific during September 1990. The focus of the paper is on the vertical profiles of the linear depolarization ratio, ...

R. Meneghini; H. Kumagai

1994-06-01T23:59:59.000Z

274

Characteristic Features of Warm-Type Rain Producing Heavy Rainfall over the Korean Peninsula Inferred from TRMM Measurements  

Science Conference Proceedings (OSTI)

In contrast to the view that deep convection causes heavy rainfall, Tropical Rainfall Measuring Mission (TRMM) measurements demonstrate that heavy rainfall (ranging from moderate to extreme rain rate) over the Korean peninsula is associated more ...

B. J. Sohn; Geun-Hyeok Ryu; Hwan-Jin Song; Mi-Lim Ou

2013-11-01T23:59:59.000Z

275

Numerical Simulation of a Rain Shower Affected by Waste Energy Released from a Cooling Tower Complex in a Calm Environment  

Science Conference Proceedings (OSTI)

An axisymmetric cloud model is used to investigate the evolution of convective cells and associated rain showers that develop due to the sensible and latent heat released into a calm atmosphere from an industrial cooling complex. The simulated ...

S. Guan; G. W. Reuter

1995-01-01T23:59:59.000Z

276

CPOL Radar-Derived Drop Size Distribution Statistics of Stratiform and Convective Rain for Two Regimes in Darwin, Australia  

Science Conference Proceedings (OSTI)

This note builds on prior technique development related to the classification of rain types utilizing C-band polarimetric (CPOL) radar measurements. While the prior work was preliminary and limited in scope, the authors elaborate here on the ...

M. Thurai; V. N. Bringi; P. T. May

2010-05-01T23:59:59.000Z

277

A Comparison of Gamma and Lognormal Distributions for Characterizing Satellite Rain Rates from the Tropical Rainfall Measuring Mission  

Science Conference Proceedings (OSTI)

This study investigates the spatial characteristics of nonzero rain rates to develop a probability density function (PDF) model of precipitation using rainfall data from the Tropical Rainfall Measuring Mission (TRMM) satellite. The minimum ?2 ...

Hye-Kyung Cho; Kenneth P. Bowman; Gerald R. North

2004-11-01T23:59:59.000Z

278

An Analysis of Freezing Rain, Freezing Drizzle, and Ice Pellets across the United States and Canada: 1976–90  

Science Conference Proceedings (OSTI)

A comprehensive analysis of freezing rain, freezing drizzle, and ice pellets was conducted using data from surface observations across the United States and Canada. This study complements other studies of freezing precipitation in the United ...

John V. Cortinas Jr.Ben C. Bernstein; Christopher C. Robbins; J. Walter Strapp

2004-04-01T23:59:59.000Z

279

Characteristic features of warm-type rain producing heavy rainfall over the Korean peninsula inferred from TRMM measurements  

Science Conference Proceedings (OSTI)

In contrast to the view that deep convection causes the heavy rainfall, Tropical Rainfall Measuring Mission (TRMM) measurements demonstrate that heavy rainfall (ranging from moderate to extreme rain rate) over the Korean peninsula is associated ...

B.J. Sohn; Geun-Hyeok Ryu; Hwan-Jin Song; Mi-Lim Ou

280

Voluntary compliance with market-based environment poliy [sic] : evidence from the U.S. acid rain program  

E-Print Network (OSTI)

The U.S. acid rain program, Title IV of the 1990 Clean Air Act Amendments, is a pioneering experience in environmental regulation by setting a market for electric utility emissions of sulfur dioxide (SO2) and by including ...

Montero, Juan Pablo

Note: This page contains sample records for the topic "rain disdrometer disdrometer" 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.


281

Rain water transport and storage in a model sandy soil with hydrogel particle additives  

E-Print Network (OSTI)

We study rain water infiltration and drainage in a dry model sandy soil with superabsorbent hydrogel particle additives by measuring the mass of retained water for non-ponding rainfall using a self-built 3D laboratory set-up. In the pure model sandy soil, the retained water curve measurements indicate that instead of a stable horizontal wetting front that grows downward uniformly, a narrow fingered flow forms under the top layer of water-saturated soil. This rain water channelization phenomenon not only further reduces the available rain water in the plant root zone, but also affects the efficiency of soil additives, such as superabsorbent hydrogel particles. Our studies show that the shape of the retained water curve for a soil packing with hydrogel particle additives strongly depends on the location and the concentration of the hydrogel particles in the model sandy soil. By carefully choosing the particle size and distribution methods, we may use the swollen hydrogel particles to modify the soil pore structure, to clog or extend the water channels in sandy soils, or to build water reservoirs in the plant root zone.

Y. Wei; D. J. Durian

2013-10-23T23:59:59.000Z

282

Using biodiversity methods to assess the impacts of oil and gas development in tropical rain forests  

Science Conference Proceedings (OSTI)

Oil and gas development in tropical rain forests has attracted international attention because of the potentially adverse effects on the forest ecosystems. Biodiversity is a topic of particular concern, but is difficult to assess for small areas of disturbance. In July 1992 we used light traps to compare insect diversity at canopy and ground level as a means of detecting the impacts of an exploratory well site and related facilities within mature Amazonian rain forest in the Oriente Province of Ecuador. Replicate samples were collected at the well site, in a nearby area of agricultural development, and in a reference site within mature forest. Species richness was determined, and diversity indices were calculated for each set of samples. Results indicated that changes in diversity could be detected in the canopy and at ground level at the well site, but that the reduction in diversity was small. Biological diversity was substantially reduced in the area of agricultural development. Limitations and possible applications of this approach are discussed.

Reagan, D.P.; Silva del Poso, X. [Woodward-Clyde Consultants, Denver, CO (United States)]|[Sociedad Entomologica Ecuatoriana, Quito (Ecuador)

1995-06-01T23:59:59.000Z

283

Core hole drilling and the ''rain current'' phenomenon at Newberry Volcano, Oregon  

SciTech Connect

Two core holes have been completed on the flanks of Newberry Volcano, Oregon. Core hole Geo N-1 has a heat flow of 180 mW m/sup -2/, reflecting subsurface temperatures, sufficient for commerical exploitation of geothermally generated electricity. GEO N-3, which has a heat flow of 86 mW m/sup -2/, is less encouraging. We emphasize the ''rain curtain'' effect with the hope that a detailed discussion of this phenomenon at two distinct localities will lead to a better understanding of the physical processes in operation. Cole hole GEO N-1 was cored to a depth of 1387 m at a site located 9.3 km south of the center of the volcano. Core hole GEO N-3 was cored to a depth of 1220 m at a site located 12.6 km north of the center of the volcano. Both core holes penetrated interbedded pyroclastic lava flows and lithic tuffs ranging in composition from basalt to rhyolite, basaltic andesite being the most common rock type. Potassium-argon age dates range up to 2 Ma. Caving and sloughing were encountered in both core holes at depths near the regional water table. Both core holes penetrate three distinct thermal regimes. The uppermost regime is isothemal at mean air temperature down to about 900-1000 m (the rain curtain).

Swanberg, C.A.; Walkey, W.C.; Combs, J.

1988-09-10T23:59:59.000Z

284

Rain-Induced Increase in Background Radiation Detected by Radiation Portal Monitors  

Science Conference Proceedings (OSTI)

A complete understanding of both the steady state and transient background measured by Radiation Portal Monitors (RPMs) is essential to predictable system performance, as well as maximization of detection sensitivity. To facilitate this understanding, a test bed for the study of natural background in RPMs has been established at the Oak Ridge National Laboratory. This work was performed in support of the Second Line of Defense Program's mission to detect the illicit movement of nuclear material. In the present work, transient increases in gamma ray counting rates in RPMs due to rain are investigated. The increase in background activity associated with rain, which has been well documented in the field of environmental radioactivity, originates from the atmospheric deposition of two radioactive daughters of radon-222, namely lead-214 and bismuth-214 (henceforth {sup 222}Rn, {sup 214}Pb and {sup 214}Bi). In this study, rainfall rates recorded by a co-located weather station are compared with RPM count rates and High Purity Germanium spectra. The data verifies these radionuclides are responsible for the dominant transient natural background fluctuations in RPMs. Effects on system performance and potential mitigation strategies are discussed.

Hausladen, Paul [ORNL; Blessinger, Christopher S [ORNL; Guzzardo, Tyler [ORNL; Livesay, Jake [ORNL

2012-07-01T23:59:59.000Z

285

Overview of the oxidation and scavenging characteristics of April rains (OSCAR) experiment  

SciTech Connect

The OSCAR (Oxidation and Scavenging Characteristics of April Rains) field experiment was conducted in April, 1981, as part of the MAP3S/RAINE program. The OSCAR study was designed to provide detailed characterizations of the physicochemical and dynamical features of selected cyclonic storm systems as they traversed the eastern U.S. Major experiment components included sequential precipitation chemistry measurements, aircraft measurements both in cloud and in clear air in storm inflow regions, surface-level air chemistry measurements, and supporting meteorological measurements. The precipitation chemisty network consisted of an intermediate-density network with 37 sampling sites covering the region from southern Ontario to Tennessee and from Illinois to New Hampshire, and a high-density network with 47 sampling sites located in a 100 by 100 km area in northeast Indiana. A total of four storm events were studied during the experiment. The report describes the design and operational aspects for the high-density and intermediate-density components of the experiment, and the composition of the integrated OSCAR data set which has been developed. A synoptic meteorological description of the four storm events studied during OSCAR is also provided. 17 references, 13 figures, 8 tables.

Easter, R.C.; Dana, M.T.; Thorp, J.M.; Busness, K.M.; Hales, J.M.; Raynor, G.S.; Benkovitz, C.M.; Tanner, R.L.; Shannon, J.D.

1984-04-01T23:59:59.000Z

286

Theoretical Analysis and Meteorological Interpretation of the Role of Raindrop Shape on Microwave Attenuation and Propagation Phase Shifts: Implication for the Radar Measurement of Rain  

Science Conference Proceedings (OSTI)

In rain radars can measure various powers of the drop diameter averaged over the drop size distribution. These averages can then be used to infer rain water content (W) or the rainfall rate in still air (R0). Besides being sensitive to drop sizes ...

A. R. Jameson

1989-02-01T23:59:59.000Z

287

The U.S. Acid rain program: Key insights from the design, operation, and assessment of a Cap-and-Trade program  

Science Conference Proceedings (OSTI)

The authors' 15 years of experience with the Acid Rain Program suggests that for regional or larger-scale air pollution problems, such as acid rain and pollution transport, a well-designed cap-and-trade program can be cost-effective, flexible, and easy to implement with clear benefits that can be sustained into the future. (author)

Napolitano, Sam; Schreifels, Jeremy; Stevens, Gabrielle; Witt, Maggie; LaCount, Melanie; Forte, Reynaldo; Smith, Kenon

2007-08-15T23:59:59.000Z

288

Microsoft PowerPoint - 16.0855_Raines Draft Rev 4  

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

Management Update Management Update Project Management Update Bob Raines Director, Project Management Systems and Assessments * Everybody's Favorite Subject Cost Estimating * Cost Estimating * EVMS * Metrics * Take Aways Agenda 2 Agenda * Ahead of Schedule On Budget - S-2's Stretch Goal 177 Projects $92B TPC - 177 Projects, $92B TPC * Front End Planning - User Acceptance Testing - Comprehensive Training - System Documentation - Capacity/Throughput Testing Capacity/Throughput Testing - Communications via ESC * Thank You For Your Support! * Ensure New Contracts Include PARS II Requirement PARS II Everyone's Favorite Subject 3 PARS II : Everyone s Favorite Subject * DOE is Taking Advantage of PARS II Taking Advantage of PARS II Taking Advantage of PARS II Taking Advantage of PARS II - SC is Using PARS II For an IT Project

289

Managing nontechnical risks associated with seismic operations in the tropical rain forests of Ecuador  

Science Conference Proceedings (OSTI)

Companies operating in sensitive areas are being challenged to address the environmental and social issues while preserving these areas for future generations. This increased international attention on environmental and sociocultural issues has led Amoco to focus efforts on developing new ideas and strategies to facilitate environmental and cultural management. In Ecuador, the major oil producing region is the Ecuadorian portion of the Amazon Basin, referred to locally as the Oriente. Amoco Ecuador BV recently completed a seismic acquisition program in the Oriente with minimum impact to the environment and the communities within the project area. The goal of this article is to describe Amoco`s experience in managing environmental, social, and public perception issues associated with seismic operations in the rain forests of Ecuador.

Barker, G.; Smith, G.R.; Vacas, F.J. [Amoco Corp., Houston, TX (United States); Swingholm, E.K.; Yuill, R.M.; Aleman, M.A.

1997-04-21T23:59:59.000Z

290

The Influence of Entrainment and Mixing on the Initial Formation of Rain in a Warm Cumulus Cloud  

Science Conference Proceedings (OSTI)

The objective of this study is to address the problem of the production of rain in warm cumulus clouds that has been observed to occur within about 20 min. A hybrid model approach is used where a microphysical parcel model is run along ...

William A. Cooper; Sonia G. Lasher-Trapp; Alan M. Blyth

2013-06-01T23:59:59.000Z

291

Tests of Rain Profiling Algorithms for a Spaceborne Radar Using Raincell Models and Real Data Precipitation Fields  

Science Conference Proceedings (OSTI)

This paper compares the performances of several algorithms for profiling the rain rate from a spaceborne radar. Three techniques are considered: single frequency (or SF) at 13.8, or 24 GHz; dual frequency (or DF) at 13.8 and 24 GHz; and dual beam ...

Jacques Testud; Paul Amayenc; Xiankang Dou; Taoufix Tani

1996-04-01T23:59:59.000Z

292

The Use of Partial Cloudiness in a Warm-Rain Parameterization: A Subgrid-Scale Precipitation Scheme  

Science Conference Proceedings (OSTI)

A method is proposed on how to handle the effects of partial cloudiness in a warm-rain microphysical scheme and how to generate subgrid-scale precipitation. The method is simple and concerns essentially two ideas: the use of the vertical ...

Peter Bechtold; Jean Pierre Pinty; Patrick Mascart

1993-12-01T23:59:59.000Z

293

Correction of Radar Reflectivity and Differential Reflectivity for Rain Attenuation at X Band. Part I: Theoretical and Empirical Basis  

Science Conference Proceedings (OSTI)

In this two-part paper, a correction for rain attenuation of radar reflectivity (ZH) and differential reflectivity (ZDR) at the X-band wavelength is presented. The correction algorithm that is used is based on the self-consistent method with ...

S-G. Park; V. N. Bringi; V. Chandrasekar; M. Maki; K. Iwanami

2005-11-01T23:59:59.000Z

294

The Relation of Radar to Cloud Area-Time Integrals and Implications for Rain Measurements from Space  

Science Conference Proceedings (OSTI)

In this work we determine the relationships between satellite-based and radar-measured area-time integrals (ATI) for convective storms and show how both depend upon the climatological conditional mean rain rate Rc, and the ratio of the measured ...

David Atlas; Thomas L. Bell

1992-09-01T23:59:59.000Z

295

Rain versus Snow in the Sierra Nevada, California: Comparing Doppler Profiling Radar and Surface Observations of Melting Level  

Science Conference Proceedings (OSTI)

The maritime mountain ranges of western North America span a wide range of elevations and are extremely sensitive to flooding from warm winter storms, primarily because rain falls at higher elevations and over a much greater fraction of a basin’s ...

Jessica D. Lundquist; Paul J. Neiman; Brooks Martner; Allen B. White; Daniel J. Gottas; F. Martin Ralph

2008-04-01T23:59:59.000Z

296

CAMS–OPI: A Global Satellite–Rain Gauge Merged Product for Real-Time Precipitation Monitoring Applications  

Science Conference Proceedings (OSTI)

A method has been developed to produce real-time rain gauge–satellite merged analyses of global monthly precipitation. A dataset of these analyses spans the period from January 1979 to the present, which is sufficiently long to allow the ...

John E. Janowiak; Pingping Xie

1999-11-01T23:59:59.000Z

297

Dynamics of coronal rain and descending plasma blobs in solar prominences: I. Fully ionised case  

E-Print Network (OSTI)

Observations of active regions and limb prominences often show cold, dense blobs descending with an acceleration smaller than that of free fall. The dynamics of these condensations falling in the solar corona is investigated in this paper using a simple fully ionised plasma model. We find that the presence of a heavy condensation gives rise to a dynamical rearrangement of the coronal pressure that results in the formation of a large pressure gradient that opposes gravity. Eventually this pressure gradient becomes so large that the blob acceleration vanishes or even points upwards. Then, the blob descent is characterised by an initial acceleration phase followed by an essentially constant velocity phase. These two stages can be identified in published time-distance diagrams of coronal rain events. Both the duration of the first stage and the velocity attained by the blob increase for larger values of the ratio of blob to coronal density, for larger blob mass, and for smaller coronal temperature. Dense blobs ar...

Oliver, R; Terradas, J; Zaqarashvili, T V; Khodachenko, M L

2013-01-01T23:59:59.000Z

298

Current and Future Carbon Budgets of Tropical Rain Forest: A Cross Scale Analysis. Final Report  

DOE Green Energy (OSTI)

The goal of this project was to make a first assessment of the major carbon stocks and fluxes and their climatic determinants in a lowland neotropical rain forest, the La Selva Biological Station, Costa Rica. Our research design was based on the concurrent use of several of the best available approaches, so that data could be cross-validated. A major focus of our effort was to combine meteorological studies of whole-forest carbon exchange (eddy flux), with parallel independent measurements of key components of the forest carbon budget. The eddy flux system operated from February 1998 to February 2001. To obtain field data that could be scaled up to the landscape level, we monitored carbon stocks, net primary productivity components including tree growth and mortality, litterfall, woody debris production, root biomass, and soil respiration in a series of replicated plots stratified across the major environmental gradients of the forest. A second major focus of this project was on the stocks and changes of carbon in the soil. We used isotope studies and intensive monitoring to investigate soil organic stocks and the climate-driven variation of soil respiration down the soil profile, in a set of six 4m deep soil shafts stratified across the landscape. We measured short term tree growth, climate responses of sap flow, and phenology in a suite of ten canopy trees to develop individual models of tree growth to daytime weather variables.

Oberbauer, S. F.

2004-01-16T23:59:59.000Z

299

Relationships between Rain Characteristics and Environment. Part I: TRMM Precipitation Features and the Large-Scale Environment over the Tropical Pacific  

Science Conference Proceedings (OSTI)

Differences in the characteristics of rain systems in the eastern Pacific (EP) intertropical convergence zone (ITCZ) and the western Pacific (WP) warm pool are quantitatively examined in relation to the large-scale environment. This study mainly ...

Chie Yokoyama; Yukari N. Takayabu

2012-09-01T23:59:59.000Z

300

Evaluation of a Satellite Multispectral VIS–IR Daytime Statistical Rain-Rate Classifier and Comparison with Passive Microwave Rainfall Estimates  

Science Conference Proceedings (OSTI)

A daytime surface rain-rate classifier, based on artificial neural networks (ANNs), is proposed for the Spinning Enhanced Visible and Infrared Imager (SEVIRI) on board the Meteosat-8 geostationary satellite. It is developed over the British Isles ...

Davide Capacci; Federico Porcù

2009-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "rain disdrometer disdrometer" 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.


301

Global Precipitation Estimates Based on a Technique for Combining Satellite-Based Estimates, Rain Gauge Analysis, and NWP Model Precipitation Information  

Science Conference Proceedings (OSTI)

The “satellite-gauge-model” (SGM) technique is described for combining precipitation estimates from microwave satellite data, infrared satellite data, rain gauge analyses, and numerical weather prediction models into improved estimates of global ...

George J. Huffman; Robert F. Adler; Bruno Rudolf; Udo Schneider; Peter R. Keehn

1995-05-01T23:59:59.000Z

302

Satellite Data Assimilation in Numerical Weather Prediction Models. Part II: Uses of Rain-Affected Radiances from Microwave Observations for Hurricane Vortex Analysis  

Science Conference Proceedings (OSTI)

A hybrid variational scheme (HVAR) is developed to produce the vortex analysis associated with tropical storms. This scheme allows for direct assimilation of rain-affected radiances from satellite microwave instruments. In the HVAR, the ...

Fuzhong Weng; Tong Zhu; Banghua Yan

2007-11-01T23:59:59.000Z

303

Synoptic-Scale Environments of Predecessor Rain Events Occurring East of the Rocky Mountains in Association with Atlantic Basin Tropical Cyclones  

Science Conference Proceedings (OSTI)

The synoptic-scale environments of predecessor rain events (PREs) occurring to the east of the Rocky Mountains in association with Atlantic basin tropical cyclones (TCs) are examined. PREs that occurred during 1988–2010 are subjectively classified ...

Benjamin J. Moore; Lance F. Bosart; Daniel Keyser; Michael L. Jurewicz

2013-03-01T23:59:59.000Z

304

Distant Effects of a Recurving Tropical Cyclone on Rainfall in a Midlatitude Convective System: A High-Impact Predecessor Rain Event  

Science Conference Proceedings (OSTI)

Recent research has identified predecessor rain events (PREs), which are mesoscale regions of heavy rainfall that occur 1000 km poleward and downshear of recurving tropical cyclones (TCs). PREs typically occur 24–36 h prior to the arrival of the ...

Russ S. Schumacher; Thomas J. Galarneau Jr.; Lance F. Bosart

2011-02-01T23:59:59.000Z

305

Difficulties with Correcting Radar Rainfall Estimates Based on Rain Gauge Data: A Case Study of Severe Weather in Montana on 16–17 June 2007  

Science Conference Proceedings (OSTI)

The principal source of information for operational flash flood monitoring and warning issuance is weather radar–based quantitative estimates of precipitation. Rain gauges are considered truth for the purposes of validating and calibrating real-...

Steven V. Vasiloff; Kenneth W. Howard; Jian Zhang

2009-10-01T23:59:59.000Z

306

The Challenge of Forecasting Heavy Rain and Flooding throughout the Eastern Region of the National Weather Service. Part I: Characteristics and Events  

Science Conference Proceedings (OSTI)

Heavy rain and flooding are of particular concern to forecasters throughout the eastern and southeastern United States. In this paper, the unique combination of synoptic-scale and mesoscale weather conditions and topographic factors that ...

Kenneth D. Lapenta; Barbara J. McNaught; Steven J. Capriola; Louis A. Giordano; Charles D. Little; Stephen D. Hrebenach; Gary M. Carter; Mario D. Valverde; Derek S. Frey

1995-03-01T23:59:59.000Z

307

The Numerical Simulation of Clouds, Rains and Airflow over the Vosges and Black Forest Mountains: A Meso-? Model with Parameterized Microphysics  

Science Conference Proceedings (OSTI)

A three-dimensional meso-? model with parameterized microphysics is presented. The model is capable of simulating orographically forced clouds, rain, and airflow. Tests using a two-dimensional version confirm the ability of the model to replicate ...

Everett C. Nickerson; Evelyne Richard; Robert Rosset; David R. Smith

1986-02-01T23:59:59.000Z

308

Validation and Development of Melting Layer Models Using Constraints by Active/Passive Microwave Observations of Rain and the Wind-Roughened Ocean Surface  

Science Conference Proceedings (OSTI)

A physically based method is developed to estimate the microphysical structure of the melting layer in stratiform rain using airborne observations by a dual-frequency radar and a 10.7-GHz radiometer. The method employs a nonlinear optimal ...

Shannon T. Brown; Christopher S. Ruf

2007-04-01T23:59:59.000Z

309

The Challenge of Forecasting Heavy Rain and Flooding throughout the Eastern Region of the National Weather Service. Part II: Forecast Techniques and Applications  

Science Conference Proceedings (OSTI)

Over the years, as the recognition and understanding of the structure and climatic frequency of heavy-rain events has expanded, there has been a corresponding improvement in the available forecast guidance on both the national and local level. ...

Harold H. Opitz; Solomon G. Summer; David A. Wert; Warren R. Snyder; Richard J. Kane; Raymond H. Brady; Paul M. Stokols; Stephan C. Kuhl; Gary M. Carter

1995-03-01T23:59:59.000Z

310

Spatial and Microphysical Characteristics of Low-Ceiling, Temperature-Inverted Clouds in Warm Overrunning and Freezing-Rain Conditions: A Case Study  

Science Conference Proceedings (OSTI)

In-flight microphysical measurements in classical freezing-rain conditions were used to study the vertical and horizontal characteristics of the precipitation and associated low-ceiling, stratiform clouds, which are usually present as overcast in ...

Richard K. Jeck

2011-10-01T23:59:59.000Z

311

A Space-Filling Algorithm to Extrapolate Narrow-Swath Instantaneous TRMM Microwave Rain-Rate Estimates Using Thermal IR Imagery  

Science Conference Proceedings (OSTI)

A space-filling algorithm (SFA) based on 2D spectral estimation techniques was developed to extrapolate the spatial domain of the narrow-swath near-instantaneous rain-rate estimates from Tropical Rainfall Measuring Mission (TRMM) precipitation ...

Ana P. Barros; Kun Tao

2008-11-01T23:59:59.000Z

312

The Area-Time-Integral Technique to Estimate Convective Rain Volumes over Areas Applied to Satellite Data—A Preliminary Investigation  

Science Conference Proceedings (OSTI)

Early work attempting to apply GOES rapid scan satellite data to a recently developed simple radar technique used to estimate convective rain volumes over areas in a semiarid environment (the northern Great Plains) is described.

AndréA. Doneaud; James R. Miller Jr.; L. Ronald Johnson; Thomas H. Vonder Haar; Patrick Laybe

1987-01-01T23:59:59.000Z

313

Initiation and Organizational Modes of an Extreme-Rain-Producing Mesoscale Convective System along a Mei-Yu Front in East China  

Science Conference Proceedings (OSTI)

The initiation and organization of a quasi-linear extreme-rain-producing mesoscale convective system (MCS) along a Meiyu front in East China during the midnight-to-morning hours of 8 July 2007 are studied using high-resolution surface observations ...

Yali Luo; Yu Gong; Da-Lin Zhang

314

A Class of Single- and Dual-Frequency Algorithms for Rain-Rate Profiling from a Spaceborne Radar. Pad I: Principle and Tests from Numerical Simulations  

Science Conference Proceedings (OSTI)

A class of single- and dual-frequency algorithms that can be used to infer rain-rate profile from a downward-looking spaceborne radar operating at attenuating frequencies is presented. These algorithms rely on use of power-law relations between ...

Mongi Marzoug; Paul Amayenc

1994-12-01T23:59:59.000Z

315

A Class of Single- and Dual-Frequency Algorithms for Rain-Rate Profiling from a Spaceborne Radar. Part II: Tests from Airborne Radar Measurements  

Science Conference Proceedings (OSTI)

In Part I, four single-frequency (SF) algorithms and a dual-frequency (DF) algorithm for range profiling of the rain rate from a spaceborne radar were described and tested from numerical simulations. In Part II, performances of these algorithms ...

Paul Amayenc; Jean Philippe Diguet; Mongi Marzoug; Taoufik Tani

1996-02-01T23:59:59.000Z

316

Superposition of the Neyman–Scott Rectangular Pulses Model and the Poisson White Noise Model for the Representation of Tropical Rain Rates  

Science Conference Proceedings (OSTI)

A point process model for tropical rain rates is developed through the derivation of the third moment expression for a combined point process model. The model is a superposition of a Neyman–Scott rectangular pulse model and a Poisson white noise ...

Mark L. Morrissey

2009-04-01T23:59:59.000Z

317

The south central Texas heavy rain event of October 1998: an MM5 simulation and diagnosis of convective initiation  

E-Print Network (OSTI)

During the weekend of 17-18 October 1998, extremely heavy rainfall over south central Texas resulted in widespread flash flooding and numerous river floods. Southern Hays County received 760 mm of rainfall, and an area of 18,000 km² recorded over 250 mm. The convection began in a weakly forced environment well ahead of a cold front that was forecast to trigger the storms. The Penn State University/NCAR Mesoscale Model version 5 (MM5) was used to diagnose the extent and magnitude of upward motion, the convective potential of the environment, and the causes of the upward motion that contributed to the convective initiation. A rainfall analysis constructed from all available observations and radar estimates was used for a quantitative comparision with the MM5-simulated rainfall. The MM5's success in simulating many aspects of the rainfall suggested that the atmospheric processes that brought about this heavy rain event were also present in the model simulation. Using a 48-km model grid, upward motion was found to be more than sufficient to cause deep convection in the conditionally unstable atmosphere of south Texas. The cause of the upward motion was attributed to differential warm advection focused by a low-level jet centered over the region where convection began.

Scott, Richard Kevin

2001-01-01T23:59:59.000Z

318

Comparison of Drop Size Distribution Parameter (D0) and Rain Rate from S-Band Dual-Polarized Ground Radar, TRMM Precipitation Radar (PR), and Combined PR–TMI: Two Events from Kwajalein Atoll  

Science Conference Proceedings (OSTI)

The estimation of the drop size distribution parameter [median volume diameter (D0)] and rain rate (R) from the Tropical Rainfall Measuring Mission (TRMM) precipitation radar (PR) as well as from combined PR–TRMM Microwave Imager (TMI) algorithms ...

V. N. Bringi; Gwo-Jong Huang; S. Joseph Munchak; Christian D. Kummerow; David A. Marks; David B. Wolff

2012-11-01T23:59:59.000Z

319

ARM - Field Campaign - Midlatitude Continental Convective Clouds Experiment  

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

Experiment (MC3E) Experiment (MC3E) Campaign Links Science Plan MC3E Website Related Campaigns Midlatitude Continental Convective Clouds Experiment: 2DVD Support 2011.04.22, Schwaller, SGP Midlatitude Continental Convective Clouds Experiment (MC3E): Airborne Instruments 2011.04.22, Poellot, AAF Midlatitude Continental Convective Clouds Experiment (MC3E): Multi-Frequency Profilers 2011.04.22, Williams, SGP Midlatitude Continental Convective Clouds Experiment: Parsivel Disdrometer Support 2011.04.22, Schwaller, SGP Midlatitude Continental Convective Clouds Experiment (MC3E): Inner Domain Thermodynamic Profiling during MC3E 2011.04.22, Turner, SGP Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Midlatitude Continental Convective Clouds Experiment (MC3E)

320

Pingin' in the rain  

Science Conference Proceedings (OSTI)

Residential Internet connections are susceptible to weather-caused outages: Lightning and wind cause local power failures, direct lightning strikes destroy equipment, and water in the atmosphere degrades satellite links. Outages caused by severe events ... Keywords: ThunderPing, outage, ping, weather

Aaron Schulman; Neil Spring

2011-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "rain disdrometer disdrometer" 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.


321

Controlling acid rain  

E-Print Network (OSTI)

High concentrations of sulfuric and nitric acid in raTn fn the northeastern USA are caused by the large scale combustion of fossil fuels within this region. Average precipitation acidity is pH 4.2, but spatial and temporal ...

Fay, James A.

1983-01-01T23:59:59.000Z

322

Minisodar Measurements of Rain  

Science Conference Proceedings (OSTI)

Measurements of raindrop fall velocity spectra have been made with a minisodar. Amplitude calibration of the system enables the calculation of drop size parameters such as number density, water density, and surface area using methods similar to ...

R. L. Coulter; T. J. Martin; T. M. Weckwerth

1989-06-01T23:59:59.000Z

323

Chemical alteration of limestone and marble samples exposed to acid rain and weathering in the eastern United States, 1984--1988  

Science Conference Proceedings (OSTI)

In a long-term program that began in 1984, limestone and marble briquettes have been exposed to both anthropogenic acid deposition and natural weathering of four field sites in the eastern United States. Similar tests began at an Ohio site in 1986. Effects of exposure on the briquettes and other materials at the sites are evaluated periodically by several federal agencies cooperating in the National Acid Precipitation Assessment Program (NAPAP). A primary contribution of Argonne National Laboratory to the NAPAP has been chemical analysis to determine changes in the samples caused by exposure to the environment. Wet chemical analysis was used to detect sulfates, nitrates, fluorides, chlorides, and a series of metal cations in sequential layers of stone removed from the briquettes after field exposure. Results from the first four years of the program indicate that rinsing by rain keeps skyward-facing stone relatively clean of reaction products, especially sulfate, the most abundant product. On groundward-facing samples, sulfate concentrations increased linearly with exposure time, and values were proportional to atmospheric SO{sub 2} concentrations at the site. Sulfate concentrations in groundward samples were much higher in limestone than in marble, because of the greater porosity of the limestone. A steep sulfate gradient was seen in both sample types from the surface to the interior. On skyward surfaces, material losses per rain event due to complete dissolution of accumulated sulfates were approximately equal to concentrations measured in runoff. Preexposed limestone samples had sulfate accumulations deep in their interiors, while fresh, unexposed limestone did not. No substantial changes in cation accumulations wee detected in either limestone or marble.

Reimann, K.J.

1991-06-01T23:59:59.000Z

324

Estimating the Accuracy of Polarimetric Radar–Based Retrievals of Drop-Size Distribution Parameters and Rain Rate: An Application of Error Variance Separation Using Radar-Derived Spatial Correlations  

Science Conference Proceedings (OSTI)

The accuracy of retrieving the two drop size distribution (DSD) parameters, median volume diameter (D0), and normalized intercept parameter (NW), as well as rain rate (R), from polarimetric C-band radar data obtained during a cool-season, long-...

M. Thurai; V. N. Bringi; L. D. Carey; P. Gatlin; E. Schultz; W. A. Petersen

2012-06-01T23:59:59.000Z

325

Improved Coupled Z?R and k?R Relations and the Resulting Ambiguities in the Determination of the Vertical Distribution of Rain from the Radar Backscatter and the Integrated Attenuation  

Science Conference Proceedings (OSTI)

Several algorithms to calculate a rain-rate profile from a single-frequency air- or spaceborne radar backscatter profile and a given path-integrated attenuation have been proposed. The accuracy of any such algorithm is limited by the ambiguities ...

Z. S. Haddad; A. R. Jameson; E. Im; S. L. Durden

1995-12-01T23:59:59.000Z

326

Lake-Effect Rain Events  

Science Conference Proceedings (OSTI)

Seven years of autumnal (September–November) precipitation data are examined to determine the characteristics of lake-effect precipitation downwind of Lake Erie. Atmospheric conditions for each lake-effect event are compiled and the mean ...

Todd J. Miner; J. M. Fritsch

1997-12-01T23:59:59.000Z

327

A ACID RAIN Audrey Gibson  

E-Print Network (OSTI)

acid and nitric acid. Sunlight increases the rate of most of these reactions. Electric utility plants;Gas Natural Sources Concentration Carbon dioxide CO2 Decomposition 355 ppm Nitric oxide NO Electric, 2010 #12;Gas Non-Natural Sources Concentration Nitric oxide NO Internal Combustion (cars) 0.2 ppm

Toohey, Darin W.

328

How Often Does It Rain?  

Science Conference Proceedings (OSTI)

Daily precipitation data from worldwide stations and gridded analyses and from 18 coupled global climate models are used to evaluate the models' performance in simulating the precipitation frequency, intensity, and the number of rainy days ...

Ying Sun; Susan Solomon; Aiguo Dai; Robert W. Portmann

2006-03-01T23:59:59.000Z

329

Effect of CH4 and O2 variations on rates of CH4 oxidation and stable isotope fractionation in tropical rain forest soils  

Science Conference Proceedings (OSTI)

Methane-oxidizing bacteria are the primary sink for CH{sub 4} in reduced soils, and account for as much as 90 percent of all CH{sub 4} produced. Methanotrophic bacteria strongly discriminate against the heavy isotopes of carbon, resulting in CH{sub 4} emissions that are significantly more enriched in {sup 13}C than the original source material. Previous studies have used an isotope mass balance approach to quantify CH{sub 4} sources and sinks in the field, based on the assumption that the fractionation factor for CH{sub 4} oxidation is a constant. This study quantifies the effect of systematic variations in CH{sub 4} and O{sub 2} concentrations on rates of CH{sub 4} oxidation and stable isotope fractionation in tropical rain forest soils. Soils were collected from the 0-15 cm depth, and incubated with varying concentrations of CH{sub 4} (100 ppmv, 500 ppmv, 1000 ppmv, and 5000 ppmv) or O{sub 2} (3 percent, 5 percent, 10 percent, and 21 percent). The isotope fractionation factor for CH{sub 4} oxidation was calculated for each incubation using a Rayleigh fractionation model. Rates of CH{sub 4} oxidation varied significantly between CH{sub 4} treatments, with the 100 ppmv CH{sub 4} treatment showing the lowest rate of CH{sub 4} uptake, and the other 3 treatments showing similar rates of CH{sub 4} uptake. Rates of CH{sub 4} oxidation did not vary significantly between the different O{sub 2} treatments. The fractionation factor for CH{sub 4} oxidation varied significantly between the different CH{sub 4} treatments, with the 5000 ppmv CH{sub 4} treatment showing the largest {sup 13}C-enrichment of residual CH{sub 4}. In treatments where CH{sub 4} concentration was not rate-limiting (> 500 ppmv CH{sub 4}), the fractionation factor for CH{sub 4} oxidation was negatively correlated with CH{sub 4} oxidation rate (P activity or CH{sub 4} pool size.

Teh, Yit Arn; Conrad, Mark; Silver, Whendee L.; Carlson, Charlotte M.

2003-10-01T23:59:59.000Z

330

Effect of CH4 and O2 variations on rates of CH4 oxidation and stable isotope fractionation in tropical rain forest soils  

SciTech Connect

Methane-oxidizing bacteria are the primary sink for CH{sub 4} in reduced soils, and account for as much as 90 percent of all CH{sub 4} produced. Methanotrophic bacteria strongly discriminate against the heavy isotopes of carbon, resulting in CH{sub 4} emissions that are significantly more enriched in {sup 13}C than the original source material. Previous studies have used an isotope mass balance approach to quantify CH{sub 4} sources and sinks in the field, based on the assumption that the fractionation factor for CH{sub 4} oxidation is a constant. This study quantifies the effect of systematic variations in CH{sub 4} and O{sub 2} concentrations on rates of CH{sub 4} oxidation and stable isotope fractionation in tropical rain forest soils. Soils were collected from the 0-15 cm depth, and incubated with varying concentrations of CH{sub 4} (100 ppmv, 500 ppmv, 1000 ppmv, and 5000 ppmv) or O{sub 2} (3 percent, 5 percent, 10 percent, and 21 percent). The isotope fractionation factor for CH{sub 4} oxidation was calculated for each incubation using a Rayleigh fractionation model. Rates of CH{sub 4} oxidation varied significantly between CH{sub 4} treatments, with the 100 ppmv CH{sub 4} treatment showing the lowest rate of CH{sub 4} uptake, and the other 3 treatments showing similar rates of CH{sub 4} uptake. Rates of CH{sub 4} oxidation did not vary significantly between the different O{sub 2} treatments. The fractionation factor for CH{sub 4} oxidation varied significantly between the different CH{sub 4} treatments, with the 5000 ppmv CH{sub 4} treatment showing the largest {sup 13}C-enrichment of residual CH{sub 4}. In treatments where CH{sub 4} concentration was not rate-limiting (> 500 ppmv CH{sub 4}), the fractionation factor for CH{sub 4} oxidation was negatively correlated with CH{sub 4} oxidation rate (P < 0.003, r{sup 2} = 0.86). A multiple regression model that included initial CH{sub 4} concentration and CH{sub 4} oxidation rate as independent variables accounted for 94 percent of the variability in the isotope fractionation data, suggesting that both factors are important in determining the extent of isotopic fractionation (P < 0.002, r{sup 2} = 0.94). The fractionation factor for CH{sub 4} oxidation did not vary significantly between the different O{sub 2} treatments. These results challenge the assumption that the isotope fractionation factor for CH{sub 4} oxidation remains constant, regardless of metabolic activity or CH{sub 4} pool size.

Teh, Yit Arn; Conrad, Mark; Silver, Whendee L.; Carlson, Charlotte M.

2003-10-01T23:59:59.000Z

331

ARM - Midlatitude Continental Convective Clouds Experiment (MC3E): Multi-Frequency Profilers, Surface Meteorology (williams-surfmet)  

DOE Data Explorer (OSTI)

This data was collected by the NOAA 449-MHz and 2.8-GHz profilers in support of the Department of Energy (DOE) and NASA sponsored Mid-latitude Continental Convective Cloud Experiment (MC3E). The profiling radars were deployed in Northern Oklahoma at the DOE Atmospheric Radiation Mission (ARM) Southern Great Plans (SGP) Central Facility from 22 April through 6 June 2011. NOAA deployed three instruments: a Parsivel disdrometer, a 2.8-GHz profiler, and a 449-MHz profiler. The parasivel provided surface estimates of the raindrop size distribution and is the reference used to absolutely calibrate the 2.8 GHz profiler. The 2.8-GHz profiler provided unattenuated reflectivity profiles of the precipitation. The 449-MHz profiler provided estimates of the vertical air motion during precipitation from near the surface to just below the freezing level. By using the combination of 2.8-GHz and 449-MHz profiler observations, vertical profiles of raindrop size distributions can be retrieved. The profilers are often reference by their frequency band: the 2.8-GHz profiler operates in the S-band and the 449-MHz profiler operates in the UHF band. The raw observations are available as well as calibrated spectra and moments. This document describes how the instruments were deployed, how the data was collected, and the format of the archived data.

Christopher Williams; Mike Jensen

332

ARM - Midlatitude Continental Convective Clouds Experiment (MC3E): Multi-Frequency Profilers, S-band Radar (williams-s_band)  

DOE Data Explorer (OSTI)

This data was collected by the NOAA 449-MHz and 2.8-GHz profilers in support of the Department of Energy (DOE) and NASA sponsored Mid-latitude Continental Convective Cloud Experiment (MC3E). The profiling radars were deployed in Northern Oklahoma at the DOE Atmospheric Radiation Mission (ARM) Southern Great Plans (SGP) Central Facility from 22 April through 6 June 2011. NOAA deployed three instruments: a Parsivel disdrometer, a 2.8-GHz profiler, and a 449-MHz profiler. The parasivel provided surface estimates of the raindrop size distribution and is the reference used to absolutely calibrate the 2.8 GHz profiler. The 2.8-GHz profiler provided unattenuated reflectivity profiles of the precipitation. The 449-MHz profiler provided estimates of the vertical air motion during precipitation from near the surface to just below the freezing level. By using the combination of 2.8-GHz and 449-MHz profiler observations, vertical profiles of raindrop size distributions can be retrieved. The profilers are often reference by their frequency band: the 2.8-GHz profiler operates in the S-band and the 449-MHz profiler operates in the UHF band. The raw observations are available as well as calibrated spectra and moments. This document describes how the instruments were deployed, how the data was collected, and the format of the archived data.

Christopher Williams

333

ARM - Midlatitude Continental Convective Clouds Experiment (MC3E): Multi-Frequency Profilers, Vertical Air Motion (williams-vertair)  

DOE Data Explorer (OSTI)

This data was collected by the NOAA 449-MHz and 2.8-GHz profilers in support of the Department of Energy (DOE) and NASA sponsored Mid-latitude Continental Convective Cloud Experiment (MC3E). The profiling radars were deployed in Northern Oklahoma at the DOE Atmospheric Radiation Mission (ARM) Southern Great Plans (SGP) Central Facility from 22 April through 6 June 2011. NOAA deployed three instruments: a Parsivel disdrometer, a 2.8-GHz profiler, and a 449-MHz profiler. The parasivel provided surface estimates of the raindrop size distribution and is the reference used to absolutely calibrate the 2.8 GHz profiler. The 2.8-GHz profiler provided unattenuated reflectivity profiles of the precipitation. The 449-MHz profiler provided estimates of the vertical air motion during precipitation from near the surface to just below the freezing level. By using the combination of 2.8-GHz and 449-MHz profiler observations, vertical profiles of raindrop size distributions can be retrieved. The profilers are often reference by their frequency band: the 2.8-GHz profiler operates in the S-band and the 449-MHz profiler operates in the UHF band. The raw observations are available as well as calibrated spectra and moments. This document describes how the instruments were deployed, how the data was collected, and the format of the archived data.

Christopher Williams; Mike Jensen

334

ARM - Midlatitude Continental Convective Clouds Experiment (MC3E): Multi-Frequency Profilers, 449 MHz Profiler(williams-449_prof)  

DOE Data Explorer (OSTI)

This data was collected by the NOAA 449-MHz and 2.8-GHz profilers in support of the Department of Energy (DOE) and NASA sponsored Mid-latitude Continental Convective Cloud Experiment (MC3E). The profiling radars were deployed in Northern Oklahoma at the DOE Atmospheric Radiation Mission (ARM) Southern Great Plans (SGP) Central Facility from 22 April through 6 June 2011. NOAA deployed three instruments: a Parsivel disdrometer, a 2.8-GHz profiler, and a 449-MHz profiler. The parasivel provided surface estimates of the raindrop size distribution and is the reference used to absolutely calibrate the 2.8 GHz profiler. The 2.8-GHz profiler provided unattenuated reflectivity profiles of the precipitation. The 449-MHz profiler provided estimates of the vertical air motion during precipitation from near the surface to just below the freezing level. By using the combination of 2.8-GHz and 449-MHz profiler observations, vertical profiles of raindrop size distributions can be retrieved. The profilers are often reference by their frequency band: the 2.8-GHz profiler operates in the S-band and the 449-MHz profiler operates in the UHF band. The raw observations are available as well as calibrated spectra and moments. This document describes how the instruments were deployed, how the data was collected, and the format of the archived data.

Christopher Williams; Mike Jensen

335

Observation and Analysis of Midwestern Rain Rates  

Science Conference Proceedings (OSTI)

A prototype meteorological station has been established in Iowa City for the measurement of surface meteorological parameters with accuracy and resolution sufficient to allow for modern dimensional and scaling analyses. The sensor characteristics ...

K. P. Georgakakos; A. A. Carsteanu; P. L. Sturdevant; J. A. Cramer

1994-12-01T23:59:59.000Z

336

Numerical Modeling of Orographically Forced Postfrontal Rain  

Science Conference Proceedings (OSTI)

A nonhydrostatic mesoscale model is used to simulate the dynamics and microphysics of postfrontal flow in the mountainous region of southeastern Australia. The aim of the paper is to determine if it is possible to use 2D models to simulate the ...

Deborah J. Abbs; Jørgen B. Jensen

1993-01-01T23:59:59.000Z

337

NH Acid Rain Control Act (New Hampshire)  

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

The Act is implemented under New Hampshire's acid deposition control program established under the Rules to Control Air Pollution in Chapter Env-A 400. The goal of the Act is to reduce emissions...

338

Acoustic Radar Studies of Rain Microphysics  

Science Conference Proceedings (OSTI)

Raindrop size distributions are obtained from the Doppler frequency spectrum of an acoustic radar. Number concentrations of 12 drop diameters with a minimum diameter 0.14 cm are obtained and averaged over 3–15 min at 20-m range gates from 20 to ...

S. G. Bradley

1997-06-01T23:59:59.000Z

339

In Search of the Rain Forest  

E-Print Network (OSTI)

oil extraction in Ecuador, the appropriation and industrialization of herbal medicine in the forests of Belize, a critical history

Hamilton-Smith, Elery

2005-01-01T23:59:59.000Z

340

Rain scavenging studies. Progress report No. 11  

SciTech Connect

The modeling of convective storm scavenging processes is going forward on two distinct fronts. The first of these relates to the microphysical processes, particularly to the study of their response to micro-dynamical components of the convective circulation. It is found that the droplet size spectra generated are responsive to variations of vertical velocity due to turbulence within the cloud and to humidity variations due to entrainment processes. Both sets of variations give responses that differ for different amplitudes and frequencies, i.e., rapid, small-amplitude eddies appear to enhance small-droplet development, whereas slow, large-amplitude oscillations tend to enhance large-droplet development. An allied study of the assumptions used in the microphysical equations is also being made. The second modeling effort is addressed to the problem of three-dimensional representation of convective dynamics. Equations are presented, and some of the problems under attack are discussed. (auth)

Dingle, A.N.

1975-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "rain disdrometer disdrometer" 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.


341

Robert B. Raines | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure...

342

A Survey of Radar Rain Measurement Techniques  

Science Conference Proceedings (OSTI)

Several methods used to estimate rainfall rate R are surveyed. The distribution N(D) of drop sizes is of central importance in determining the reflectivity factor Z, attenuation rate K, and R. With single-parameter measurement techniques either ...

Richard J. Doviak

1983-05-01T23:59:59.000Z

343

Jack Rains | Y-12 National Security Complex  

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

EARLY CHILDHOOD I was born 7-7-36, and I was one of eight children, and we were living at Norris Lake at Demre community when they started building TVA. Then my dad had...

344

Rain Rate and Water Content in Hurricanes Compared with Summer Rain in Miami, Florida  

Science Conference Proceedings (OSTI)

Liquid water content (g m?3), precipitation rate (mm h?1), and radar reflectivity (dBZ) are inferred from cross sections of particle images obtained by aircraft. Each dataset is presented in a probability format to display changing functional ...

Robert A. Black; John Hallett

2012-12-01T23:59:59.000Z

345

Rain/No-Rain Classification Methods for Microwave Radiometer Observations over Land Using Statistical Information for Brightness Temperatures under No-Rain Conditions  

Science Conference Proceedings (OSTI)

One of the goals of the Global Precipitation Measurement project, the successor to the Tropical Rainfall Measuring Mission (TRMM), is to produce a 3-hourly global rainfall map using several spaceborne microwave radiometers. It is important, ...

Shinta Seto; Nobuhiro Takahashi; Toshio Iguchi

2005-08-01T23:59:59.000Z

346

The Optimization and Calibration of a Rain Intensity Gauge  

Science Conference Proceedings (OSTI)

The high temporal variability of rainfall requires that measurements be taken at a high frequency for that variability to be recorded well, but most conventional gauges do not have this capability. The gauge described has a resolution estimated ...

John Sansom; Warren R. Gray

2002-01-01T23:59:59.000Z

347

Polarization Radar Measurements in Rain at 5 and 9 GHz  

Science Conference Proceedings (OSTI)

There is increased interest in dual-polarization radar measurements at 9 and 5 GHz not only for scientific reasons but also because such radars are less expensive to build and are easier to transport than 3-GHz S-band radars. Unfortunately, ...

A. R. Jameson

1991-11-01T23:59:59.000Z

348

The Droplike Nature of Rain and Its Invariant Statistical Properties  

Science Conference Proceedings (OSTI)

This study looks for statistically invariant properties of the sequences of inter-drop time intervals and drop diameters. The authors provide evidence that these invariant properties have the following characteristics: 1) large inter-drop time ...

Massimiliano Ignaccolo; Carlo De Michele; Simone Bianco

2009-02-01T23:59:59.000Z

349

A Microphysical Interpretation of Radar Reflectivity–Rain Rate Relationships  

Science Conference Proceedings (OSTI)

The microphysical aspects of the relationship between radar reflectivity Z and rainfall rate R are examined. Various concepts discussed in the literature are integrated into a coherent analytical framework and discussed with a focus on the ...

Matthias Steiner; James A. Smith; Remko Uijlenhoet

2004-05-01T23:59:59.000Z

350

Sensitivity Analysis of Rain Characteristics on HTO Concentration in Drops  

Science Conference Proceedings (OSTI)

Environmental and Organically Bound Tritium / Proceedings of the Ninth International Conference on Tritium Science and Technology (Part 2)

L. Patryl; D. Galeriu; P. Armand

351

Front Doors, Back Doors, and Trapdoors to Acid Rain Control  

E-Print Network (OSTI)

for Fossil-Fuel-Fired Steam Generators, 40 C.F.R. § 60.43a (for Fossil-Fuel-Fired Steam Generators, 40 C.F.R. § 60.43 (

Manor, C. Robert

1987-01-01T23:59:59.000Z

352

Rain Estimation from Infrared and Visible GOES Satellite Data  

Science Conference Proceedings (OSTI)

An automated statistical pattern recognition technique is presented that uses visible and IR satellite imagery to estimate instantaneous surface rainfall rates. The technique uses both brightness and textural statistics to estimate rainfall in 10 ...

Finbarr O'Sullivan; Carlyle H. Wash; Michael Stewart; Craig E. Motell

1990-03-01T23:59:59.000Z

353

Rain noise level measurements in a performing arts center  

Science Conference Proceedings (OSTI)

Noise level measurements made in a performance hall and in related spaces with subjectively described light

Robert C. Coffeen

2007-01-01T23:59:59.000Z

354

When It Rains, It Doesn't Always Pour  

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

Annually, Darwin sees three distinct climate patterns: a dry continental regime, a wet monsoon season, and a transition period between the two. Using data from weather instruments,...

355

Incentive mechanisms as a strategic option for acid rain compliance  

Science Conference Proceedings (OSTI)

Title IV of the Clean Air Act Amendments (CAAA) of 1990 (P.L. 101--549) establishes the use of flexible emission compliance strategies for electric utilities to reduce the emissions of add precursors (SO{sub 2}, NO{sub 2}). To control SO{sub 2} emissions, tradeable emission allowances will be used; NO{sub 2} emissions will be controlled by an emission standard, but a utility is permitted to average NO{sub 2} emissions systemwide to meet the standard. Both of these policies promote flexibility and cost savings for the utility while achieving the prescribed emission reduction goals of P.L. 101--549. The use of SO{sub 2} emission allowances has two notable benefits: A utility has the choice of a wide range of compliance methods allowing it to minimize compliance costs and second; the use of transferable emission allowances promote technological innovation with respect to emissions reduction/control. This report discusses the use of regulatory incentives towards the achievement of a Title IV goal of cost reduction of SO{sub 2} emissions.

South, D.W.; Bailey, K.A.; McDermott, K.A.

1991-12-31T23:59:59.000Z

356

Incentive mechanisms as a strategic option for acid rain compliance  

Science Conference Proceedings (OSTI)

Title IV of the Clean Air Act Amendments (CAAA) of 1990 (P.L. 101--549) establishes the use of flexible emission compliance strategies for electric utilities to reduce the emissions of add precursors (SO[sub 2], NO[sub 2]). To control SO[sub 2] emissions, tradeable emission allowances will be used; NO[sub 2] emissions will be controlled by an emission standard, but a utility is permitted to average NO[sub 2] emissions systemwide to meet the standard. Both of these policies promote flexibility and cost savings for the utility while achieving the prescribed emission reduction goals of P.L. 101--549. The use of SO[sub 2] emission allowances has two notable benefits: A utility has the choice of a wide range of compliance methods allowing it to minimize compliance costs and second; the use of transferable emission allowances promote technological innovation with respect to emissions reduction/control. This report discusses the use of regulatory incentives towards the achievement of a Title IV goal of cost reduction of SO[sub 2] emissions.

South, D.W.; Bailey, K.A.; McDermott, K.A.

1991-01-01T23:59:59.000Z

357

Rain on the Roof-Evaporative Spray Roof Cooling  

E-Print Network (OSTI)

This paper describes evaporative spray roof cooling systems, their components, performance and applications in various climates and building types. The evolution of this indirect evaporative cooling technique is discussed. Psychrometric and sol-air principles are covered and a simplified method of evaluation presented. A life cycle energy savings example is discussed. Benefits of roof life and roof top equipment efficiency and maintenance are covered as well as water consumption and performance trade-offs with alternate methods of roof heat gain control. Testimonials and case studies are presented. The gradual migration of business, industry, and populace to the southern United States was largely brought on by the advent of the practical air-conditioner, cheap electricity, and the harshness of northern winters. But while "wintering at Palm Beach" has been replaced by "Sun Belt industries" ; the compression-refrigeration cooling cycle is about the only thing separating millions of southerners (native and adopted) from August heat stroke and the Detroit News employment ads. This migration has been spurred by economic recessions which hit harder at the competitively populated northern centers than at the still growing industries of the south. These trends are important illustrations of the concern for efficient cooling strategies. Not only are homes in hot climates vulnerable to the now not-so-low cost of electricity but large, compact. and heavily occupied buildings (offices, schools, hospitals, theaters, etc.) often must air-condition year-around. In 1968. air-conditioning was 3% of U.S. end energy consumption compared to 18% for space heating and 25% for transportation. By 1980, according to Electric Power Research Institute's Oliver Yu, air-conditioning use was 12.5% of all electricity generated and by the year 2000 is projected to reach 16.7% "as migration slows and the GNP reaches a stable 3% growth rate" (EPRI 1982 to 1986 Overview and Strategy). Of further significance is the effect of air-conditioning loads on the peak generating requirements of electrical utilities. Because utilities must build generating capacity to meet peak requirements, they normally charge a higher summer kWh rate (for residential) and levy a peak kW demand charge on a monthly or even annual "ratchet" rate (for larger service customers). The June '83 cover of Houston City Magazine, in reference to future electrical rates, promised: "Pay or Sweat". Typical of many cooling or heat gain prevention strategies being employed on "innovative" buildings in warm climates, evaporative spray roof cooling (ESRC) systems (not to be confused with roof ponds) are not new. Like ventilated structures, ice house roofs, enhanced ventilation, masonry walls, night sky radiation and ground contact cooling, evaporative cooling in many forms has been around for centuries. (See Solar Age, July '82 and February '81 for related articles). Even the development of roof spray systems is not as newly founded as one might suspect.

Bachman, L. R.

1985-01-01T23:59:59.000Z

358

On nuclear scars, renewables, and an acid rain model  

SciTech Connect

The author argues that the extreme precautions observed at a nuclear power plant and throughout the nuclear industry create an interesting conflict in imagery. First, the safety measures far exceed the normal acceptable lengths taken to protect workers and the public at large in any other circumstance. Second, those very extremes in precaution contribute to public fear. Naturally, anti-nuclear radicals use this to great advantage by constantly trying to force more extreme measures on the industry. According to the author it happens even though some of these groups seem to realize that fighting the most environmentally benign source of power makes no sense.

Rittenhouse, R.C

1989-11-01T23:59:59.000Z

359

Universal Multifractals: Theory and Observations for Rain and Clouds  

Science Conference Proceedings (OSTI)

The standard model of atmospheric motions divides the atmosphere into distinct two- and three-dimensional isotropic turbulent regimes separated by a dimensional transition, the “mesoscale gap.” It is argued that the “gap” is fictional and that ...

Y. Tessier; S. Lovejoy; D. Schertzer

1993-02-01T23:59:59.000Z

360

Rain Detection and Quality Control of SeaWinds  

Science Conference Proceedings (OSTI)

A good assessment of the information content of scatterometer winds is particularly important in order to assimilate them in weather analysis. Besides retrieval problems in cases of a confused sea state, a particularly acute problem of Ku-band ...

M. Portabella; A. Stoffelen

2001-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "rain disdrometer disdrometer" 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

Some Comments on Passive Microwave Measurement of Rain  

Science Conference Proceedings (OSTI)

It is argued that because microwave radiation interacts much more strongly with hydrometeors than with cloud particles, microwave measurements from space offer a significant chance of making global precipitation estimates. Over oceans, passive ...

Thomas T. Wilheit

1986-10-01T23:59:59.000Z

362

Relating Convective and Stratiform Rain to Latent Heating  

Science Conference Proceedings (OSTI)

The relationship among surface rainfall, its intensity, and its associated stratiform amount is established by examining observed precipitation data from the Tropical Rainfall Measuring Mission (TRMM) Precipitation Radar (PR). The results show ...

Wei-Kuo Tao; Stephen Lang; Xiping Zeng; Shoichi Shige; Yukari Takayabu

2010-04-01T23:59:59.000Z

363

EPRI Freezing Rain Ice Mapping Project: Region 4  

Science Conference Proceedings (OSTI)

To ensure reliable electric service, accurate predictions of ice loads are needed for the design and evaluation of new and existing transmission lines. This report presents ice load maps for the states of North and South Dakota and documents the methodology used to generate them.

1997-12-19T23:59:59.000Z

364

The Mesoscale Dynamics of Freezing Rain Storms over Eastern Canada  

Science Conference Proceedings (OSTI)

A severe ice storm affected the east coast of Canada during the Canadian Atlantic Storms Project II. A hierarchy of cloud-resolving model simulations of this storm was performed with the objective of enhancing understanding of the cloud and ...

K. K. Szeto; A. Tremblay; H. Guan; D. R. Hudak; R. E. Stewart; Z. Cao

1999-05-01T23:59:59.000Z

365

Icing Severity in the December 2002 Freezing-Rain Storm from ASOS Data  

Science Conference Proceedings (OSTI)

The ice storm of 3–5 December 2002 affected the southern United States from Oklahoma to Virginia. The weight of ice on trees and power lines caused power outages lasting more than a week in some areas. The total precipitation across this region ...

Kathleen F. Jones; Allan C. Ramsay; J. Neal Lott

2004-07-01T23:59:59.000Z

366

A Combined Multisensor Optimal Estimation Retrieval Algorithm for Oceanic Warm Rain Clouds  

Science Conference Proceedings (OSTI)

The complicated interactions between cloud processes in the tropical hydrologic cycle and their responses to changes in environmental variables have been the focus of many recent investigations. Most studies that examine the response of the ...

Anita D. Rapp; G. Elsaesser; C. Kummerow

2009-11-01T23:59:59.000Z

367

Climatological Validation of TRMM TMI and PR Monthly Rain Products over Oklahoma  

Science Conference Proceedings (OSTI)

This paper reports the results from a regional validation study of monthly precipitation products generated from sensor measurements aboard the Tropical Rainfall Measuring Mission (TRMM) satellite. The study analyzed 4 yr of precipitation ...

Brad L. Fisher

2004-04-01T23:59:59.000Z

368

The Effect of Tropical Atlantic Heating Anomalies upon GCM Rain Forecasts over the Americas  

Science Conference Proceedings (OSTI)

Severe droughts occurred over eastern sections of North America and central sections of South America in 1986 and 1988. We summarize data suggesting that both periods were characterized by above-normal tropical Atlantic sea surface temperatures ...

Julio Buchmann; Jan Paegle; Lawrence E. Buja; Robert E. Dickinson

1990-02-01T23:59:59.000Z

369

A Revised Cloud Overlap Scheme for Fast Microwave Radiative Transfer in Rain and Cloud  

Science Conference Proceedings (OSTI)

The assimilation of cloud- and precipitation-affected observations into weather forecasting systems requires very fast calculations of radiative transfer in the presence of multiple scattering. At the European Centre for Medium-Range Weather ...

Alan J. Geer; Peter Bauer; Christopher W. O’Dell

2009-11-01T23:59:59.000Z

370

Infrared and Visible Satellite Rain Estimation. Part I: A Grid Cell Approach  

Science Conference Proceedings (OSTI)

The relationships between satellite-viewed cloudy (or partly cloudy) grid cells and the variability of the precipitation contained therein are explored. Using a 32 km grid and 30 min interval visible, infrared and radar data, 5 days of the ...

Andrew J. Negri; Robert F. Adler

1987-11-01T23:59:59.000Z

371

Heavy Rain in the Middle East Related to Unusual Jet Stream Properties  

Science Conference Proceedings (OSTI)

A major and fatal flooding event illustrative of rare similar cases in the Middle East was related to unusual characteristics of the jet stream. Contrary to the usual conditions, the jet stream had anticyclonic curvature and sloped northward with ...

Uri Dayan; Richard Abramski

1983-10-01T23:59:59.000Z

372

Rain Estimation from Satellites: An Examination of the Griffith-Woodley Technique  

Science Conference Proceedings (OSTI)

The Griffith-Woodley Technique (GWT) is an approach to estimating precipitation using infrared observations of clouds from geosynchronous satellites. It is examined in three ways: an analysis of the terms in the GWT equations; a case study of ...

Andrew J. Negri; Robert F. Adler; Peter J. Wetzel

1984-01-01T23:59:59.000Z

373

Radar and Rain Gauge Analysis of the Extreme Rainfall during Hurricane Danny’s (1997) Landfall  

Science Conference Proceedings (OSTI)

As a minimal hurricane, Danny moved over Mobile Bay around 0900 UTC 19 July 1997 and became stationary by midmorning, while situated within a synoptic col. Danny then evolved into an asymmetric storm with an intensely convective rainband that ...

Jeffrey M. Medlin; Sytske K. Kimball; Keith G. Blackwell

2007-05-01T23:59:59.000Z

374

Multiday Circulation and Precipitation Climatology during Winter Rain Events of Differing Intensities in Central Chile  

Science Conference Proceedings (OSTI)

The majority of precipitation in central Chile falls during austral winter with the passage of surface and upper-level low pressure systems and their associated surface fronts. Earlier studies have found the presence of a terrain-parallel, low-...

Bradford S. Barrett; Dominique Bastine Krieger; Caroline P. Barlow

2011-10-01T23:59:59.000Z

375

Impact of Atmospheric Infrared Sounder Data on the Numerical Simulation of a Historical Mumbai Rain Event  

Science Conference Proceedings (OSTI)

In this paper, the three-dimensional variational data assimilation scheme (3DVAR) in the fifth-generation Pennsylvania State University–National Center for Atmospheric Research (Penn State–NCAR) Mesoscale Model (MM5) is used to study the impact ...

Randhir Singh; P. K. Pal; C. M. Kishtawal; P. C. Joshi

2008-10-01T23:59:59.000Z

376

Combining CMORPH and Rain Gauges Observations over the Rio Negro Basin  

Science Conference Proceedings (OSTI)

Several algorithms that combine daily precipitation surface data and satellite Climate Prediction Center Morphing Technique (CMORPH) estimations were implemented and tested for the Rio Negro basin in northeastern Uruguay. Bias removal of satellite ...

Alejandra De Vera; Rafael Terra

2012-12-01T23:59:59.000Z

377

Influence of the Kuroshio in the East China Sea on the Early Summer (Baiu) Rain  

Science Conference Proceedings (OSTI)

Influence of the Kuroshio in the East China Sea on the baiu rainband is examined using satellite observations, a reanalysis dataset, and a regional atmospheric model from 2003 to 2008. Satellite observations and reanalysis data reveal that ...

Yoshi N. Sasaki; S. Minobe; T. Asai; M. Inatsu

2012-10-01T23:59:59.000Z

378

An Acid Rain Study in the Washington, D.C. Area  

Science Conference Proceedings (OSTI)

A field study in the Washington, D.C. area explored the impact of urban emissions and mesoscale meteorology on precipitation chemistry. The study was a follow-up to an earlier, considerably more industrialized, study in the Philadelphia area; ...

A. A. N. Patrinos; M. J. Leach; R. M. Brown; R. L. Tanner; F. S. Binkowski

1989-09-01T23:59:59.000Z

379

Satellite Retrievals of Arctic and Equatorial Rain and Snowfall Rates Using Millimeter Wavelengths  

E-Print Network (OSTI)

A new global precipitation retrieval algorithm for the millimeter-wave Advanced Microwave Sounding Unit is presented that also retrieves Arctic precipitation rates over surface snow and ice. This algorithm improves upon ...

Surussavadee, Chinnawat

380

Drop Size Separation in Numerically Simulated Convective Clouds and Its Effect on Warm Rain Formation  

Science Conference Proceedings (OSTI)

It is shown that, as a result of the flow diffluence at the upper levels of the cloud, droplets of different sizes move along different trajectories. The small droplets with negligible fall velocities will have higher probability of being carried ...

Yefim L. Kogan

1993-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "rain disdrometer disdrometer" 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.


381

A Preliminary Analysis of Spatial Variability of Raindrop Size Distributions during Stratiform Rain Events  

Science Conference Proceedings (OSTI)

The spatial variability of raindrop size distributions (DSDs) and precipitation fields is investigated utilizing disdrometric measurements from the four Precipitation Occurrence Sensor Systems (POSS) and radar reflectivity fields from S-band dual-...

Choong Ke Lee; Gyu Won Lee; Isztar Zawadzki; Kyung-Eak Kim

2009-02-01T23:59:59.000Z

382

Increasing Trend of Synoptic Activity and Its Relationship with Extreme Rain Events over Central India  

Science Conference Proceedings (OSTI)

The nature of the increasing frequency of extreme rainfall events (ERE) in central India is investigated by relating their occurrence to synoptic activity. Using a long record of the paths and intensities of monsoon synoptic disturbances, a ...

R. S. Ajayamohan; William J. Merryfield; Viatcheslav V. Kharin

2010-02-01T23:59:59.000Z

383

Mechanisms for Torrential Rain Associated with the Mei-Yu Development during SCSMEX 1998  

Science Conference Proceedings (OSTI)

A case of torrential precipitation associated with the mei-yu front, an Asian summer monsoon system east of the Tibetan Plateau, is studied using the coupled fifth-generation Pennsylvania State University–NCAR Mesoscale Model (MM5) and the NASA ...

Jian-Hua Qian; Wei-Kuo Tao; K-M. Lau

2004-01-01T23:59:59.000Z

384

Assessing the Potential for Rain Augmentation?The Nelspruit Randomized Convective Cloud Seeding Experiment  

Science Conference Proceedings (OSTI)

The experimental design, analyses, and results of the first Nelspruit randomized cloud seeding experiment are described. The experiment ran for three years, commencing in October 1984, and involved the on-top seeding of new cloud turrets growing ...

G. K. Mather; M. J. Dixon; J. M. de Jager

1996-09-01T23:59:59.000Z

385

Determination of Rain Cell Characteristics from the Analysis of TOPEX Altimeter Echo Waveforms  

Science Conference Proceedings (OSTI)

Radar meteorologists have estimated, over a number of years, rainfall rate with ground-based radars. Since the 1970s, use of weather radar as an active technique to measure rainfall from space has been proposed, and a number of radar concepts, ...

Jean Tournadre

1998-04-01T23:59:59.000Z

386

Evaluation of PERSIANN-CCS Rainfall Measurement Using the NAME Event Rain Gauge Network  

Science Conference Proceedings (OSTI)

Robust validation of the space–time structure of remotely sensed precipitation estimates is critical to improving their quality and confident application in water cycle–related research. In this work, the performance of the Precipitation ...

Yang Hong; David Gochis; Jiang-tao Cheng; Kuo-lin Hsu; Soroosh Sorooshian

2007-06-01T23:59:59.000Z

387

Modeled and Observed Variations in Storm Divergence and Stratiform Rain Production in Southeastern Texas  

Science Conference Proceedings (OSTI)

Storm divergence profiles observed by an S-band Doppler radar are compared to ensemble simulations of 10 disparate precipitating systems occurring in warm-season, weakly baroclinic, and strongly baroclinic environments in southeastern Texas. Eight ...

Larry J. Hopper Jr.; Courtney Schumacher

2012-04-01T23:59:59.000Z

388

Preliminary Results from Multiparameter Airborne Rain Radar Measurement in the Western Pacific  

Science Conference Proceedings (OSTI)

Preliminary results are presented from multiparameter airborne radar measurements of tropical storms. The experiment was conducted in the western Pacific in September 1990 with the NASA DC-8 aircraft that was equipped with a dual-wavelength radar ...

Hiroshi Kumagai; Robert Meneghini; Toshiaki Kozu

1993-02-01T23:59:59.000Z

389

Does Increased Predicted Warm-Season Rainfall Indicate Enhanced Likelihood of Rain Occurrence?  

Science Conference Proceedings (OSTI)

The likelihood of simulated rainfall above a specified threshold being observed is evaluated as a function of the amounts predicted by two mesoscale models. Evaluations are performed for 20 warm-season mesoscale convective system events over the ...

William A. Gallus Jr.; Moti Segal

2004-12-01T23:59:59.000Z

390

Raindrop Size Distribution and Radar Parameters in Coastal Tropical Rain Systems of Northeastern Brazil  

Science Conference Proceedings (OSTI)

A dataset on raindrop size distribution (DSD) gathered in a coastal site of the Alagoas state in northeastern Brazil is used to analyze some differences between continental and maritime rainfall parameters. The dataset is divided into two subsets. ...

Ricardo Sarmento Tenório; Marcia Cristina da Silva Moraes; Henri Sauvageot

2012-11-01T23:59:59.000Z

391

Identification of Atmospheric Fronts over the Ocean with Microwave Measurements of Water Vapor and Rain  

Science Conference Proceedings (OSTI)

This Paper describes some basic research techniques and algorithms developed to diagnose fronts in cyclonic storms over the ocean with data from satellite-borne microwave radiometers. The need for this research stems from the limited availability ...

Kristina B. Kanaros; Iffekhar Bhatti; Llynn A. Mcmurdie; Grant W. Petty

1989-12-01T23:59:59.000Z

392

Changes in TRMM Rainfall due to the Orbit Boost Estimated from Buoy Rain Gauge Data  

Science Conference Proceedings (OSTI)

During the first three-and-a-half years of the Tropical Rainfall Measuring Mission (TRMM), the TRMM satellite operated at a nominal altitude of 350 km. To reduce drag, save maneuvering fuel, and prolong the mission lifetime, the orbit was boosted ...

Jeremy D. DeMoss; Kenneth P. Bowman

2007-09-01T23:59:59.000Z

393

Mechanisms for Quasi-Stationary Behavior in Simulated Heavy-Rain-Producing Convective Systems  

Science Conference Proceedings (OSTI)

In this study, idealized numerical simulations are used to identify the processes responsible for initiating, organizing, and maintaining quasi-stationary convective systems that produce locally extreme rainfall amounts. Of particular interest ...

Russ S. Schumacher

2009-06-01T23:59:59.000Z

394

The Impacts of Multiscale Weather Systems on Freezing Rain and Snowstorms over Southern China  

Science Conference Proceedings (OSTI)

This paper investigated the interactions between the synoptic patterns, quasi-stationary fronts, eastward-propagating cloud clusters from the Tibetan Plateau, surface conditions, and atmospheric stratification processes associated with a 20-day ...

Jianhua Sun; Sixiong Zhao

2010-04-01T23:59:59.000Z

395

REFAME: Rain Estimation Using Forward-Adjusted Advection of Microwave Estimates  

Science Conference Proceedings (OSTI)

A new multiplatform multisensor satellite rainfall estimation technique is proposed in which sequences of Geostationary Earth Orbit infrared (GEO-IR) images are used to advect microwave (MW)-derived precipitation estimates along cloud motion ...

Ali Behrangi; Bisher Imam; Kuolin Hsu; Soroosh Sorooshian; Timothy J. Bellerby; George J. Huffman

2010-12-01T23:59:59.000Z

396

Acid Rain Science and Politics in Japan: A History of Knowledge and Action Toward Sustainability  

E-Print Network (OSTI)

and Action Toward Sustainability By Kenneth E. Wilkeningand Action Toward Sustainability . Cambridge, MA: MIT Press,three pollution-related sustainability crises since the end

Javed, M. Tayyeb

2005-01-01T23:59:59.000Z

397

Prediction of Clouds and Rain Using a z-Coordinate Nonhydrostatic Model  

Science Conference Proceedings (OSTI)

The most common option for numerical models of the atmosphere is to use model layers following the surface of the earth, using a terrain-following vertical coordinate. The present paper investigates the forecast of clouds and precipitation using ...

J. Steppeler; H. W. Bitzer; Z. Janjic; U. Schättler; P. Prohl; U. Gjertsen; L. Torrisi; J. Parfinievicz; E. Avgoustoglou; U. Damrath

2006-12-01T23:59:59.000Z

398

The Modification of Joint Size-Charge Distribution in Rain. Part II: Computations Involving Partial Coalescence  

Science Conference Proceedings (OSTI)

Raindrop collisional breakup is included in a model of joint size-charge distribution development. Consistent with experimental observations the model includes a finite filament (joining separating drops) that upon rupture produces charged ...

S. G. Bradley; C. D. Stow

1984-10-01T23:59:59.000Z

399

The Videosonde System and Its Use in the Study of East Asian Monsoon Rain  

Science Conference Proceedings (OSTI)

Knowledge about precipitation particles in clouds is a prerequisite for the study of precipitation and cloud electrification mechanisms. A videosonde that can inform in-cloud precipitation particle shape and charge has been designed and more than ...

Tsutomu Takahashi

2010-09-01T23:59:59.000Z

400

Effects of Different Rain Parameterizations on the Simulation of Mesoscale Orographic Precipitation  

Science Conference Proceedings (OSTI)

A detailed comparison is made between the results obtained from two microphysical parameterizations capable of simulating cloud and precipitation processes in a mesoscale model. The behavior of each microphysical scheme is first investigated in ...

Evelyne Richard; Nadine Chaumerliac

1989-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "rain disdrometer disdrometer" 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.


401

Tropical Plumes over Eastern North Africa as a Source of Rain in the Middle East  

Science Conference Proceedings (OSTI)

Tropical plumes (TPs) reflect tropical–extratropical interaction associated with the transport of moisture from the Tropics to extratropical latitudes. They are observed in satellite images as continuous narrow cloud bands ahead of upper-level ...

Shira Rubin; Baruch Ziv; Nathan Paldor

2007-12-01T23:59:59.000Z

402

1996 update on compliance and emissions trading under the U.S. acid rain program  

E-Print Network (OSTI)

November 1997This paper reports on the second year of compliance with the sulfur dioxide (SO2) emissions-reduction and -trading provisions of the Title IV of the 1990 Clean Air Act Amendments (CAAA). The material is intended ...

Ellerman, A. Denny

1998-01-01T23:59:59.000Z

403

Invariance in the Spatial Structure of Sahelian Rain Fields at Climatological Scales  

Science Conference Proceedings (OSTI)

The occurrence of rainfall in the semiarid regions is notoriously unreliable and characterized by great spatial variability over a large spectrum of timescales. Based on analytical considerations, an integrated approach is presented here in order ...

Abdou Ali; Thierry Lebel; Abou Amani

2003-12-01T23:59:59.000Z

404

Geostatistical Mapping of Precipitation from Rain Gauge Data Using Atmospheric and Terrain Characteristics  

Science Conference Proceedings (OSTI)

A geostatistical framework for integrating lower-atmosphere state variables and terrain characteristics into the spatial interpolation of rainfall is presented. Lower-atmosphere state variables considered are specific humidity and wind, derived ...

Phaedon C. Kyriakidis; Jinwon Kim; Norman L. Miller

2001-11-01T23:59:59.000Z

405

Giant Sea-Salt Aerosols and Warm Rain Formation in Marine Stratocumulus  

Science Conference Proceedings (OSTI)

The concentrations and sizes of smaller aerosols (radius smaller than 0.5 ?m) in the marine atmosphere vary owing to natural and anthropogenic factors. The concentrations and sizes of giant and ultragiant aerosols vary primarily due to wind-speed-...

Jørgen B. Jensen; Sunhee Lee

2008-12-01T23:59:59.000Z

406

Wintertime Nonbrightband Rain in California and Oregon during CALJET and PACJET: Geographic, Interannual, and Synoptic Variability  

Science Conference Proceedings (OSTI)

An objective algorithm presented in White et al. was applied to vertically pointing S-band (S-PROF) radar data recorded at four sites in northern California and western Oregon during four winters to assess the geographic, interannual, and ...

Paul J. Neiman; Gary A. Wick; F. Martin Ralph; Brooks E. Martner; Allen B. White; David E. Kingsmill

2005-05-01T23:59:59.000Z

407

Evaluation of Some Ground Truth Designs for Satellite Estimates of Rain Rate  

Science Conference Proceedings (OSTI)

In this paper point gauge measurements are analyzed as part of a ground truth design to validate satellite retrieval algorithms at the field-of-view spatial level (typically about 20 km). Even in the ideal case the ground and satellite ...

Eunho Ha; Gerald R. North; Chulsang Yoo; Kyung-Ja Ha

2002-01-01T23:59:59.000Z

408

Improved Passive Microwave Retrievals of Rain Rate over Land and Ocean. Part II: Validation and Intercomparison  

Science Conference Proceedings (OSTI)

A new passive microwave rainfall retrieval algorithm for the Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI) that relies on an a priori database derived from matchups between TMI brightness temperatures and precipitation radar (...

Grant W. Petty; Ke Li

2013-11-01T23:59:59.000Z

409

Separation of Propagation and Backscattering Effects in Rain for Circular Polarization Diversity S-Band Radars  

Science Conference Proceedings (OSTI)

Because precipitation particles are generally nonspherical, not only will microwave radiation be depolarized when reflected by precipitation, but also the polarization state of the transmitted wave will change as the radar beam penetrates the ...

Enrico Torlaschi; Anthony R. Holt

1993-08-01T23:59:59.000Z

410

A Study of the Error Covariance Matrix of Radar Rainfall Estimates in Stratiform Rain  

Science Conference Proceedings (OSTI)

The contribution of various physical sources of uncertainty affecting radar rainfall estimates at the ground is quantified toward deriving and understanding the error covariance matrix of these estimates. The focus here is on stratiform ...

Marc Berenguer; Isztar Zawadzki

2008-12-01T23:59:59.000Z

411

Near-Infrared Extinction in Rain Measured Using a Single Detector System  

Science Conference Proceedings (OSTI)

The performance and operation of an optical device to accurately measure extinction due to rainfall over a 100 m sample path is described. A collimated beam from an infrared light-emitting diode operating at 0.94 ?m is used as a sensing beam. A ...

F. J. Nedvidek; C. W. Schneider; Z. Kucerovsky; E. Brannen

1986-09-01T23:59:59.000Z

412

Thermodynamic and Kinematic Structure of a Snowband and Freezing Rain Event during STORM-FEST  

Science Conference Proceedings (OSTI)

A unique wintertime storm occurred on 12 February 1992 during the Stormscale Operational and Research Meteorology-Fronts Experiment Systems Test (STORM-FEST) field project. This storm consisted of a narrow east–west-oriented snow swath (max 20-cm ...

Hunter Coleman; John Marwitz

2002-02-01T23:59:59.000Z

413

Functional Fits to Some Observed Drop Size Distributions and Parameterization of Rain  

Science Conference Proceedings (OSTI)

A data sample of optical spectrometer measurements that were obtained in two tropical cyclones is analyzed. The resultant drop size distributions are normalized and their shape is found to exhibit some curvature-departure from exponentiality. ...

Paul T. Willis

1984-05-01T23:59:59.000Z

414

The Meteorological Parameterization of Specific Attenuation and Polarization Differential Phase Shift in Rain  

Science Conference Proceedings (OSTI)

This paper presents the theoretical bases and detailed polynomial expressions applicable to a wide range of naturally occurring drop size distributions for more accurate parameterizations of the specific attenuations at both horizontal and ...

A. R. Jameson

1993-11-01T23:59:59.000Z

415

Evidence from Tropical Raindrop Spectra of the Origin of Rain from Stratiform versus Convective Clouds  

Science Conference Proceedings (OSTI)

An analysis of temporal variations in gamma parameters of raindrop spectra is presented utilizing surface-based observations from the Tropical Ocean Global Atmosphere Couple Ocean-Atmosphere Experiment. An observed dramatic change in the N0 ...

Ali Tokay; David A. Short

1996-03-01T23:59:59.000Z

416

Spring Heavy Rain Events in Taiwan during Warm Episodes and the Associated Large-Scale Conditions  

Science Conference Proceedings (OSTI)

Daily rainfall data at 15 stations of the Taiwan Central Weather Bureau (CWB) and the gridded dataset of the National Centers for Environmental Prediction–National Center for Atmospheric Research (NCEP–NCAR) reanalysis during the period of ...

George Tai-Jen Chen; Zhihong Jiang; Ming-Chin Wu

2003-07-01T23:59:59.000Z

417

Microsoft PowerPoint - 07 Raines 2010 PMWS-Final BBB  

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

to align project baseline and contract GET TO GREEN: Achieve four month upwards trending EV data exceeding 0.90 in CPI and SPI by Jun 2010 Completion Date Estimates Total Project...

418

Digitizing Chart Recorder Data: Coordinate System Conversion for Rain Gauges and Similar Recording Instruments  

Science Conference Proceedings (OSTI)

Though chart recorder data are widely available for many environmental parameters over long periods of record, the nonorthogonal coordinate systems of many types of recorder charts complicates data extraction such that it is almost always manual; ...

M. Todd Walter; Paul Mutch; Christa D. Salmon; Donald K. McCool; Lars O. Hedin

1999-08-01T23:59:59.000Z

419

GNSS Precipitable Water Vapor from an Amazonian Rain Forest Flux Tower  

Science Conference Proceedings (OSTI)

Understanding the complex interactions between water vapor fields and deep convection on the mesoscale requires observational networks with high spatial (kilometers) and temporal (minutes) resolution. In the equatorial tropics, where deep ...

David K. Adams; Rui M. S. Fernandes; Jair M. F. Maia

2011-10-01T23:59:59.000Z

420

Effects of Rain Gauge Temporal Resolution on the Specification of a Z–R Relationship  

Science Conference Proceedings (OSTI)

The weather radar is an efficient alternative for measuring spatially varying rainfall covering a large area at a high temporal resolution. This paper studies the impact of rainfall gauge temporal resolution on optimal relationships between radar ...

Punpim Puttaraksa Mapiam; Nutchanart Sriwongsitanon; Siriluk Chumchean; Ashish Sharma

2009-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "rain disdrometer disdrometer" 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.


421

Comparison of Different Techniques for the Measurement of Precipitation in Tropical Montane Rain Forest Regions  

Science Conference Proceedings (OSTI)

Characteristics of different precipitation measurements in a tropical mountain valley in southern Ecuador are compared in this study to determine potential errors. The instruments are used for different ecological purposes like erosion studies, ...

R. Rollenbeck; J. Bendix; P. Fabian; J. Boy; W. Wilcke; H. Dalitz; M. Oesker; P. Emck

2007-02-01T23:59:59.000Z

422

Global Precipitation Retrievals Using the NOAA AMSU Millimeter-Wave Channels: Comparisons with Rain Gauges  

E-Print Network (OSTI)

A surface-precipitation-rate retrieval algorithm for 13-channel Advanced Microwave Sounding Unit (AMSU) millimeter-wave spectral observations from 23 to 191 GHz is described. It was trained using cloud-resolving fifth-generation ...

Surussavadee, Chinnawat

423

The Effects of Desert Particles Coated with Sulfate on Rain Formation in the Eastern Mediterranean  

Science Conference Proceedings (OSTI)

Measurements of aerosol composition in the eastern Mediterranean reveal that sulfate is found in most aerosol particles. Some of the large particles contain mixtures of chemicals such as sulfate and sea salt. The most striking observation is the ...

Zev Levin; Eliezer Ganor; Victor Gladstein

1996-09-01T23:59:59.000Z

424

A Satellite Passive 37-GHz Scattering-based Method for Measuring Oceanic Rain Rates  

Science Conference Proceedings (OSTI)

A combination of theory and measurement is used to develop a scattering-based method for quantitatively measuring rainfall over the ocean from Nimbus-7 Scanning Multichannel Microwave Radiometer (SMMR) 37-GHz observations. This technique takes ...

Roy W. Spencer

1986-06-01T23:59:59.000Z

425

Polarimetric Radar Rain Estimation through Retrieval of Drop Size Distribution Using a Bayesian Approach  

Science Conference Proceedings (OSTI)

This study proposes a Bayesian approach to retrieve raindrop size distributions (DSDs) and to estimate rainfall rates from radar reflectivity in horizontal polarization ZH and differential reflectivity ZDR. With this approach, the authors apply a ...

Qing Cao; Guifu Zhang; Edward A. Brandes; Terry J. Schuur

2010-05-01T23:59:59.000Z

426

Improved Passive Microwave Retrievals of Rain Rate Over Land and Ocean. 2. Validation and Intercomparison  

Science Conference Proceedings (OSTI)

A new passive microwave rainfall retrieval algorithm for the Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI) has been developed that relies on a prior database derived from matchups between TMI brightness temperatures and ...

Grant W. Petty; Ke Li

427

Improved Passive Microwave Retrievals of Rain Rate Over Land and Ocean. 1. Algorithm description  

Science Conference Proceedings (OSTI)

A new approach to passive microwave retrievals of precipitation is described that relies on an objective dimensional reduction procedure to filter, normalize, and decorrelate geophysical background noise while retaining the majority of radiometric ...

Grant W. Petty; Ke Li

428

Satellite-Derived Integrated Water Vapor and Rain Intensity Patterns: Indicators for Rapid Cyclogenesis  

Science Conference Proceedings (OSTI)

Rapidly deepening cyclones in midlatitudes are characterized by large cloud shields and abundant condensation qualitatively evident in infrared and visible satellite images. With the availability of passive microwave measurements from polar-...

Lynn A. McMurdie; Kristina B. Katsaros

1996-06-01T23:59:59.000Z

429

Wind Stress Curl and Wind Stress Divergence Biases from Rain Effects on QSCAT Surface Wind Retrievals  

Science Conference Proceedings (OSTI)

Surface vector wind datasets from scatterometers provide essential high-resolution surface forcing information for analyses and models of global atmosphere–ocean processes affecting weather and climate. The importance of realistic amplitude, high-...

Ralph F. Milliff; Jan Morzel; Dudley B. Chelton; Michael H. Freilich

2004-08-01T23:59:59.000Z

430

Turbulence Anisotropy Determined by Wind Profiler Radar and Its Correlation with Rain Events in Montreal, Canada  

Science Conference Proceedings (OSTI)

Turbulence inhomogeneities at 3-m scales can be either isotropic or anisotropic, and the degree of anisotropy can be measured with VHF wind profiler radars. Studies over a period of two years in Montreal, Quebec, Canada, have shown that for this ...

Anna Hocking; Wayne K. Hocking

2007-01-01T23:59:59.000Z

431

35-GHz Dual-Polarization Propagation Link for Rain-Rate Estimation  

Science Conference Proceedings (OSTI)

A 35-GHz dual-polarization propagation link (DPPL) is described and initial measurements are presented. The instrument is essentially a small, low-power, portable, dual linearly polarized pulsed radar that provides differential attenuation ...

Christopher S. Ruf; Kultegin Aydin; Savyasachee Mathur; Justin P. Bobak

1996-04-01T23:59:59.000Z

432

A Surface Wind Model–Based Method to Estimate Rain-Induced Radar Path Attenuation over Ocean  

Science Conference Proceedings (OSTI)

The rainfall retrieved using the Tropical Rainfall Measuring Mission (TRMM) precipitation radar (PR) depends on estimating the radar signal path-integrated attenuation using the surface reference technique (SRT). This technique assumes uniform ...

Li Li; Eastwood Im; Stephen L. Durden; Ziad S. Haddad

2002-05-01T23:59:59.000Z

433

Constructing Three-Dimensional Multiple-Radar Reflectivity Mosaics: Examples of Convective Storms and Stratiform Rain Echoes  

Science Conference Proceedings (OSTI)

The advent of Internet-2 and effective data compression techniques facilitates the economic transmission of base-level radar data from the Weather Surveillance Radar-1988 Doppler (WSR-88D) network to users in real time. The native radar spherical ...

Jian Zhang; Kenneth Howard; J. J. Gourley

2005-01-01T23:59:59.000Z

434

Understanding the Importance of Microphysics and Macrophysics for Warm Rain in Marine Low Clouds. Part I: Satellite Observations  

Science Conference Proceedings (OSTI)

The importance of macrophysical variables [cloud thickness, liquid water path (LWP)] and microphysical variables (effective radius re, effective droplet concentration Neff) on warm drizzle intensity and frequency across the tropics and subtropics ...

Terence L. Kubar; Dennis L. Hartmann; Robert Wood

2009-10-01T23:59:59.000Z

435

Ensemble-Based Analysis of Factors Leading to the Development of a Multiday Warm-Season Heavy Rain Event  

Science Conference Proceedings (OSTI)

This study makes use of operational global ensemble forecasts from the European Centre for Medium-Range Weather Forecasts (ECMWF) to examine the factors contributing to, or inhibiting, the development of a long-lived continental vortex and its ...

Russ S. Schumacher

2011-09-01T23:59:59.000Z

436

Observations of the Effect of Rain Temperature on the Surface Heat Flux in the Intertropical Convergence Zone  

Science Conference Proceedings (OSTI)

The thermohaline response of the ocean to a short (10 h) but intense (95 mm) nighttime rainfall event was observed during a transit through the ITCZ. Two CTD profiles and shipboard measurements of air–sea fluxes were consistent with the ...

P. Flament; M. Sawyer

1995-03-01T23:59:59.000Z

437

Raining lead around 250mya : a smoking gun for an Australian impact origin of the Permian Extinction.  

E-Print Network (OSTI)

studies by Steiner et al [4] in the Karoo Basin of South Africa suggest an interval less than 40,000 years" has also been applied recently to the better known P-T boundary layer in South Africa's Karoo Basin in the Karoo Supergroup (South Africa), Palaeogeography, Palaeoclimatology, Palaeoecology 194, 405-414 (2003

Angell, C. Austen

438

A Dynamic GIS–Multicriteria Technique for Siting the NASA–Clark Atlanta Urban Rain Gauge Network  

Science Conference Proceedings (OSTI)

Because Atlanta, Georgia, is a model of rapid transition from forest/agriculture land use to urbanization, NASA and other agencies have initiated programs to identify and understand how urban heat islands (UHIs) impact the environment in terms of ...

J. Marshall Shepherd; Olayiwola O. Taylor; Carlos Garza

2004-09-01T23:59:59.000Z

439

The Effect of Temperature on Attenuation-Correction Schemes in Rain Using Polarization Propagation Differential Phase Shift  

Science Conference Proceedings (OSTI)

Several investigators propose estimating the rates of attenuation using the difference in the phase with increasing distance between horizontally and vertically polarized microwaves. These attenuation estimates can then be used to correct ...

A. R. Jameson

1992-09-01T23:59:59.000Z

440

Observation of Spatial Variability of Diurnal Thermocline and Rain-Formed Halocline in the Western Pacific Warm Pool  

Science Conference Proceedings (OSTI)

High-resolution measurements of temperature and salinity were made in the near-surface layer of the ocean during the Tropical Oceans-Global Atmosphere Coupled Ocean-Atmosphere Response Experiment, using probes mounted on the bow of the R/V Moana ...

Alexander Soloviev; Roger Lukas

1996-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "rain disdrometer disdrometer" 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.


441

Validation and Intercomparison of SSM/I Rain-Rate Retrieval Methods over the Continental United States  

Science Conference Proceedings (OSTI)

An important source of error or ambiguity in the satellite passive microwave detection and estimation of precipitation rate over land is variable background emission, reflecting differences in surface temperature and moisture, soil type, and ...

Mark D. Conner; Grant W. Petty

1998-07-01T23:59:59.000Z

442

Factors Influencing the Development and Maintenance of Nocturnal Heavy-Rain-Producing Convective Systems in a Storm-Scale Ensemble  

Science Conference Proceedings (OSTI)

From 9 to 11 June 2010, a mesoscale convective vortex (MCV) was associated with several periods of heavy rainfall that led to flash flooding. During the overnight hours, mesoscale convective systems (MCSs) developed that moved slowly and produced ...

Russ S. Schumacher; Adam J. Clark; Ming Xue; Fanyou Kong

2013-08-01T23:59:59.000Z

443

Correction of Radar Reflectivity and Differential Reflectivity for Rain Attenuation at X Band. Part II: Evaluation and Application  

Science Conference Proceedings (OSTI)

In this paper, the attenuation-correction methodology presented in Part I is applied to radar measurements observed by the multiparameter radar at the X-band wavelength (MP-X) of the National Research Institute for Earth Science and Disaster ...

S-G. Park; M. Maki; K. Iwanami; V. N. Bringi; V. Chandrasekar

2005-11-01T23:59:59.000Z

444

Rain Production in Convective Clouds As Simulated in an Axisymmetric Model with Detailed Microphysics. Part I: Description of the Model  

Science Conference Proceedings (OSTI)

A hydrodynamic nonhydrostatic anelastic numerical model of an axisymmetric convective cloud is described in which the microphysical processes are treated in detail for different species of hydrometeors: drops. ice crystals, graupel, and snow ...

Tamir Reisin; Zev Levin; Shalva Tzivion

1996-02-01T23:59:59.000Z

445

Interannual Variation of the Winter Rainfall in Malaysia Caused by the Activity of Rain-Producing Disturbances  

Science Conference Proceedings (OSTI)

Heavy rainfall/flood (HRF) cyclones contribute close to two-thirds of the total rainfall PT in both parts of Malaysia [peninsular Malaysia (M) and west Borneo (B)]. Judging by the rainfall variance produced by these cyclones and its correlation (~...

Tsing-Chang Chen; Jenq-Dar Tsay; Ming-Cheng Yen; Jun Matsumoto

2013-07-01T23:59:59.000Z

446

On the Performance of a Low-Cost K-Band Doppler Radar for Quantitative Rain Measurements  

Science Conference Proceedings (OSTI)

This paper deals with the ability of a vertically pointing, FM–CW Doppler radar to measure quantitatively raindrop size distributions and rainfall intensity. The wavelength of the radar is 12.5 mm (K band). To improve estimates of the rainfall ...

Martin Löffler-Mang; Michael Kunz; Willi Schmid

1999-03-01T23:59:59.000Z

447

Seeding Effectiveness?The Interaction of Desert Dust and the Southern Margins of Rain Cloud Systems in Israel  

Science Conference Proceedings (OSTI)

Statistical analyses suggest that cloud seeding has caused a net increase of rainfall only in northern Israel. These analyses also identify the reported desert dust as a detrimental factor for the seeding effectiveness. This paper deals with the ...

Daniel Rosenfeld; Ronit Nirel

1996-09-01T23:59:59.000Z

448

The Modification of Joint Size–Charge Distribution in Rain. Part I: Computations which Exclude Partial Coalescence  

Science Conference Proceedings (OSTI)

The effect of individual charge-modifying processes is tested by following the development joint distributions of raindrop size and charge through a fall depth of 1 km beneath a weakly electrified warm cloud. Evaporation, ion capture and ...

S. G. Bradley; C. D. Stow

1984-10-01T23:59:59.000Z

449

Why a Large Amount of Rain Falls over the Sea in the Vicinity of Western Sumatra Island during Nighttime  

Science Conference Proceedings (OSTI)

Precipitation measurements from the Tropical Rainfall Measuring Mission satellite indicate that annual rainfall over the sea in the vicinity of western Sumatra Island is among the highest on the earth, and most of this rainfall occurs during ...

Peiming Wu; Masayuki Hara; Jun-ichi Hamada; Manabu D. Yamanaka; Fujio Kimura

2009-07-01T23:59:59.000Z

450

Dual-Doppler Radar Analysis of a Midlatitude Squall Line with a Trailing Region of Stratiform Rain  

Science Conference Proceedings (OSTI)

The mesoscale structure of a squall-line system that passed over Oklahoma on 22 May 1976 is investigated by dual-Doppler radar analysis. The mature storm consisted of a leading line of deep convection, which exhibited organized multicellular ...

Bradley F. Smull; Robert A. Houze Jr.

1987-08-01T23:59:59.000Z

451

Statistics of Drop Size Distribution Parameters and Rain Rates for Stratiform and Convective Precipitation during the North Australian Wet Season  

Science Conference Proceedings (OSTI)

C-band polarimetric radar measurements spanning two wet seasons are used to study the effects of the large-scale environment on the statistical properties of stratiform and convective rainfall around Darwin, Australia. The rainfall physical ...

Guillaume Penide; Vickal V. Kumar; Alain Protat; Peter T. May

2013-09-01T23:59:59.000Z

452

Combined Use of the Radar and Radiometer of TRMM to Estimate the Influence of Drop Size Distribution on Rain Retrievals  

Science Conference Proceedings (OSTI)

A combination of passive microwave and radar observations from the Tropical Rainfall Measuring Mission (TRMM) satellite is used to investigate the consistency between the two sensors. Rather than relying on some absolute “truth” to verify ...

Nicolas Viltard; Christian Kummerow; William S. Olson; Ye Hong

2000-12-01T23:59:59.000Z

453

Raindrop Size Distributions and Rain Characteristics in California Coastal Rainfall for Periods with and without a Radar Bright Band  

Science Conference Proceedings (OSTI)

Recent studies using vertically pointing S-band profiling radars showed that coastal winter storms in California and Oregon frequently do not display a melting-layer radar bright band and inferred that these nonbrightband (NBB) periods are ...

Brooks E. Martner; Sandra E. Yuter; Allen B. White; Sergey Y. Matrosov; David E. Kingsmill; F. Martin Ralph

2008-06-01T23:59:59.000Z

454

Variational Continuous Assimilation of TMI and SSM/I Rain Rates: Impact on GEOS-3 Hurricane Analyses and Forecasts  

Science Conference Proceedings (OSTI)

This study describes a 1D variational continuous assimilation (VCA) algorithm for assimilating tropical rainfall data using moisture/temperature time-tendency corrections as the control variable to offset model deficiencies. For rainfall ...

Arthur Y. Hou; Sara Q. Zhang; Oreste Reale

2004-08-01T23:59:59.000Z

455

Effects of soil structure destruction on methane production and carbon partitioning between methanogenic pathways in tropical rain forest soils  

E-Print Network (OSTI)

weathered soils of Puerto Rico: 1. Morphology, formation andForest, Commonwealth of Puerto Rico (Interim Publica- tion),in subtropical forests in Puerto Rico, Biotropica, 27, 138 –

Teh, Y A; Silver, W L

2006-01-01T23:59:59.000Z

456

A FOND FAREWELLAfter 12 years, President Shirley Raines bids adieu, page 10 DynAmIc Duos  

E-Print Network (OSTI)

Tigers ready for new athletic conference, page 24 RoARIng success Campaign surpasses lofty $250 million graduate uses art to help young people deal with physical and emotional problems. Space Odyssey by Gabrielle Maxey A U of M professor's study of space travel may have far- reaching implications for future

Dasgupta, Dipankar

457

A Study of the Error Covariance Matrix of Radar Rainfall Estimates in Stratiform Rain. Part II: Scale Dependence  

Science Conference Proceedings (OSTI)

The contribution of various physical sources of uncertainty affecting radar rainfall estimates at the ground has been recently quantified at a resolution typically used in schemes assimilating rainfall at the ground onto mesoscale models. Here, ...

Marc Berenguer; Isztar Zawadzki

2009-06-01T23:59:59.000Z

458

Cloud Layers, Particle Identification, and Rain-Rate Profiles from ZRVf Measurements by Clear-Air Doppler Radars  

Science Conference Proceedings (OSTI)

Networks of radars that point almost vertically and continuously measure the vertical profile of the horizontal wind will, in the future, be operated at many locations around the world. Although such radars are designed to measure the Doppler-...

E. E. Gossard; R. G. Strauch; D. C. Welsh; S. Y. Matrosov

1992-04-01T23:59:59.000Z

459

The Effect of Assimilating Rain Rates Derived from Satellites and Lightning on Forecasts of the 1993 Superstorm  

Science Conference Proceedings (OSTI)

Inadequate specification of divergence and moisture in the initial conditions of numerical models results in the well-documented “spinup” problem. Observational studies indicate that latent heat release can be a key ingredient in the ...

G. David Alexander; James A. Weinman; V. Mohan Karyampudi; William S. Olson; A. C. L. Lee

1999-07-01T23:59:59.000Z

460

"We'll get married if it rains": Farm women, courtship, and marriage in 1950s west Texas.  

E-Print Network (OSTI)

??This thesis is a study of courtship and the development of dating in 1950s West Texas. But aside from simply looking at courtship, this project… (more)

Humphreys, Krystal Amanda

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rain disdrometer disdrometer" 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.


461

Microwave Emission Brightness Temperature Histograms (METH) Rain Rates for Climate Studies: Remote Sensing Systems SSM/I Version-6 Results  

Science Conference Proceedings (OSTI)

A satellite microwave emission brightness temperature histograms (METH) technique has been applied to Special Sensor Microwave Imager (SSM/I) data taken on board the Defense Meteorological Satellite Program (DMSP) satellites and preprocessed by ...

Long S. Chiu; Roongroj Chokngamwong

2010-01-01T23:59:59.000Z

462

Tropical Warm Pool International Cloud Experiment (TWP-ICE): Cloud and Rain Characteristics in the Australian Monsoon  

SciTech Connect

The impact of oceanic convection on its environment and the relationship between the characteristics of the convection and the resulting cirrus characteristics is still not understood. An intense airborne measurement campaign combined with an extensive network of ground-based observations is being planned for the region near Darwin, Northern Australia, during January-February, 2006, to address these questions. The Tropical Warm Pool – International Cloud Experiment (TWP-ICE) will be the first field program in the tropics that attempts to describe the evolution of tropical convection, including the large scale heat, moisture, and momentum budgets, while at the same time obtaining detailed observations of cloud properties and the impact of the clouds on the environment. The emphasis will be on cirrus for the cloud properties component of the experiment. Cirrus clouds are ubiquitous in the tropics and have a large impact on their environment but the properties of these clouds are poorly understood. A crucial product from this experiment will be a dataset suitable to provide the forcing and testing required by cloud-resolving models and parameterizations in global climate models. This dataset will provide the necessary link between cloud properties and the models that are attempting to simulate them. The experiment is a collaboration between the U.S. Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) Program, the Bureau of Meteorology (BoM), the National Aeronautics and Space Administration (NASA), the European Commission DG RTD-1.2, and several United States, Australian, Canadian, and European Universities. This experiment will be undertaken over a 4-week period in early 2006. January and February corresponds to the wet phase of the Australia monsoon. This season has been selected because, despite Darwin’s coastal location, the convection that occurs over and near Darwin at this time is largely of maritime origin with a large fetch over water. Based on previous experiments, the convection appears typical of maritime convection with widespread convection that has complex organization, but is not as deep or as intense as continental or coastal convection. Therefore, it is expected that the convection and cloud characteristics will be representative of conditions typical for wide areas of the tropics.

PT May; C Jakob; JH Mather

2004-05-30T23:59:59.000Z

463

Why does air passage over forest yield more rain? Examining the coupling between rainfall, pressure and atmospheric moisture content  

Science Conference Proceedings (OSTI)

The influence of forest loss on rainfall remains poorly understood. Addressing this challenge Spracklen et al. recently presented a pan-tropical study of rainfall and land-cover that showed that satellite-derived rainfall measures were positively ...

A. M. Makarieva; V. G. Gorshkov; D. Sheil; A. D. Nobre; P. Bunyard; B.-L. Li

464

Equatorial Waves in the Upper Troposphere and Lower Stratosphere Forced by Latent Heating Estimated from TRMM Rain Rates  

Science Conference Proceedings (OSTI)

Equatorial atmospheric waves in the upper troposphere and lower stratosphere (UTLS), excited by latent heating, are investigated by using a global spectral model. The latent heating profiles are derived from the 3-hourly Tropical Rainfall ...

Jung-Hee Ryu; M. Joan Alexander; David A. Ortland

2011-10-01T23:59:59.000Z

465

Impact of the Vertical Variation of Cloud Droplet Size on the Estimation of Cloud Liquid Water Path and Rain Detection  

Science Conference Proceedings (OSTI)

Cloud droplet effective radius (DER) and liquid water path (LWP) are two key parameters for the quantitative assessment of cloud effects on the exchange of energy and water. Chang and Li presented an algorithm using multichannel measurements made ...

Ruiyue Chen; Fu-Lung Chang; Zhanqing Li; Ralph Ferraro; Fuzhong Weng

2007-11-01T23:59:59.000Z

466

Rainy-Season Duration Estimated from OLR versus Rain Gauge Data and the 2001 Drought in Southeast Brazil  

Science Conference Proceedings (OSTI)

Large precipitation deficits observed during the 2001 austral summer over the southeast region of Brazil contributed to the worsening of the energy crisis that was occurring in the country, with unprecedented social and economic consequences. ...

Sergio H. Franchito; V. Brahmananda Rao; Paulo R. B. Barbieri; Clovis M. E. Santo

2008-05-01T23:59:59.000Z

467

The Impact of Injection on Seismicity at The Geyses, California Geothermal Field  

E-Print Network (OSTI)

have been injecting steam condensate, local rain and streamhave been injecting steam condensate, local rain and stream

Majer, Ernest L.; Peterson, John E.

2008-01-01T23:59:59.000Z

468

Rainfall-Induced Changes in Actual Surface Backscattering Cross Sections and Effects on Rain-Rate Estimates by Spaceborne Precipitation Radar  

Science Conference Proceedings (OSTI)

In this study, the authors used Tropical Rainfall Measuring Mission precipitation radar (TRMM PR) data to investigate changes in the actual (attenuation corrected) surface backscattering cross section (?0e) due to changes in surface conditions ...

Shinta Seto; Toshio Iguchi

2007-10-01T23:59:59.000Z

469

Comparisons of Rain Rate and Reflectivity Factor Derived from the TRMM Precipitation Radar and the WSR-88D over the Melbourne, Florida, Site  

Science Conference Proceedings (OSTI)

Validating the results from the spaceborne Tropical Rainfall Measuring Mission (TRMM) precipitation radar (PR) requires comparisons with well-calibrated ground-based radar measurements. At altitudes near the storm top, where effects of PR signal ...

Liang Liao; Robert Meneghini; Toshio Iguchi

2001-12-01T23:59:59.000Z

470

Performance evaluation of interpolation methods for incorporating rain gauge measurements into NEXRAD precipitation data: A case study in the Upper Guadalupe River Basin  

Science Conference Proceedings (OSTI)

High spatial and temporal resolution of precipitation data is critical input for hydrological budget estimation and flash flood modeling. This study evaluated four methods (Bias Adjustment (BA), Simple Kriging with varying Local Means (SKlm), Kriging with External Drift (KED), and Regression Kriging (RK)) for their performances in incorporating gauge rainfall measurements into NEXRAD (Next Generation Weather Radar) Multisensor Precipitation Estimator (MPE) (hourly and 4 x 4 km{sup 2}). Measurements from a network of 50 gauges at the Upper Guadalupe River Basin, Central Texas and MPE data for the year 2004 were used in the study. We used three evaluation coefficients Percentage Bias (PB), Coefficient of Determination (R2), and Nash-Sutcliffe efficiency (NSE) to examine the performance of the four methods for preserving regional and local scale characteristics of observed precipitation data. The results show that the two Kriging-based methods (SKlm and RK) are in generally better than BA and KED and that the PB and NSE criteria are better than the R2 criterion in assessing the performance of the four methods. It is also worth noting that the performance of one method at regional scale may be different from its performance at local scale. Critical evaluation of the performance of different methods at local or regional scale should be conducted according to the different purposes. The results obtained in this study are expected to contribute to the development of more accurate spatial rainfall products for hydrologic budget and flash flood modeling.

Xie, Hongjie; Zhang, Xuesong; Yu, Beibei; Sharif, Hatim

2011-04-21T23:59:59.000Z

471

Simulation of Water and Energy Fluxes in an Old-Growth Seasonal Temperate Rain Forest Using the Simultaneous Heat and Water (SHAW) Model  

Science Conference Proceedings (OSTI)

In the Pacific Northwest (PNW), concern about the impacts of climate and land cover change on water resources and flood-generating processes emphasizes the need for a mechanistic understanding of the interactions between forest canopies and ...

Timothy E. Link; Gerald N. Flerchinger; Mike Unsworth; Danny Marks

2004-06-01T23:59:59.000Z

472

Rainfall Estimation in the Sahel. Part II: Evaluation of Rain Gauge Networks in the CILSS Countries and Objective Intercomparison of Rainfall Products  

Science Conference Proceedings (OSTI)

This study investigates the accuracy of various precipitation products for the Sahel. A first set of products is made of three ground-based precipitation estimates elaborated regionally from the gauge data collected by Centre Regional ...

Abdou Ali; Abou Amani; Arona Diedhiou; Thierry Lebel

2005-11-01T23:59:59.000Z

473

A Wind Tunnel Investigation of the Effect of an External, Vertical Electric Field on the Shape of Electrically Uncharged Rain Drops  

Science Conference Proceedings (OSTI)

Results are presented of a recent wind tunnel experiment in which electrically unchanged water drops of 1000–3000 ?m equivalent radius were freely suspended in the vertical air stream of the UCLA Cloud Tunnel. During their suspension, the drops ...

R. Rasmussen; C. Walcek; H.R. Pruppacher; S.K. Mitra; J. Lew; V. Levizzani; P.K. Wang; U. Barth

1985-08-01T23:59:59.000Z

474

An Evaluation of the Statistics of Rainfall Extremes in Rain Gauge Observations, and Satellite-Based and Reanalysis Products Using Universal Multifractals  

Science Conference Proceedings (OSTI)

Confidence in the estimation of variations in the frequency of extreme events, and specifically extreme precipitation, in response to climate variability and change is key to the development of adaptation strategies. One challenge to establishing ...

Xiaoming Sun; Ana P. Barros

2010-04-01T23:59:59.000Z

475

Impact of Cloud-Nucleating Aerosols in Cloud-Resolving Model Simulations of Warm-Rain Precipitation in the East China Sea  

Science Conference Proceedings (OSTI)

Cloud-nucleating aerosols emitted from mainland China have the potential to influence cloud and precipitation systems that propagate through the region of the East China Sea. Both simulations from the Spectral Radiation-Transport Model for ...

Stephen M. Saleeby; Wesley Berg; Susan van den Heever; Tristan L’Ecuyer

2010-12-01T23:59:59.000Z

476

Use of a Rain Gauge Network to Infer the Influence of Environmental Factors on the Propagation of Quasi-Linear Convective Systems in West Africa  

Science Conference Proceedings (OSTI)

The West African squall line is a key quasi-linear storm system that brings much of the precipitation observed in the data-poor Sudanian climate zone. Squall lines propagate at a wide range of speeds and headings, but the lack of operational ...

Jon M. Schrage; Andreas H. Fink

2007-10-01T23:59:59.000Z

477

Microbial Fuel Cells -Solar Times http://solar.rain-barrel.net/microbial-fuel-cells/ 1 of 3 6/28/2006 11:32 AM  

E-Print Network (OSTI)

a microbial fuel cell that digests wastes, instantly producing electricity. Just take a look at Dr. EmittCell.com Hydrogen Fuel Cells Buy Commercial & Educational Stacks PEM, Fuel Cell Generators & More! www a battery that generates electricity from deep sea composting micro-organisms that just love to break down

Lovley, Derek

478

The Impact of Precipitation Type Discrimination on Hydrologic Simulation: Rain–Snow Partitioning Derived from HMT-West Radar-Detected Brightband Height versus Surface Temperature Data  

Science Conference Proceedings (OSTI)

Hourly surface precipitation type (Ptype) grids (a total of 408 h from 1 December 2005 through April 20, 2006) were generated by mapping the elevation of the radar-detected brightband height (BBH) to terrain elevation during the 2005/06 ...

Naoki Mizukami; Victor Koren; Michael Smith; David Kingsmill; Ziya Zhang; Brian Cosgrove; Zhengtao Cui

2013-08-01T23:59:59.000Z

479

An Examination of Version-5 Rainfall Estimates from the TRMM Microwave Imager, Precipitation Radar, and Rain Gauges on Global, Regional, and Storm Scales  

Science Conference Proceedings (OSTI)

An evaluation of the version-5 precipitation radar (PR; algorithm 2A25) and Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI; algorithm 2A12) rainfall products is performed across the Tropics in two ways: 1) by comparing long-term ...

Stephen W. Nesbitt; Edward J. Zipser; Christian D. Kummerow

2004-07-01T23:59:59.000Z

480

Modified Hitschfeld–Bordan Equations for Attenuation-Corrected Radar Rain Reflectivity: Application to Nonuniform Beamfilling at Off-Nadir Incidence  

Science Conference Proceedings (OSTI)

As shown by Takahashi et al., multiple path attenuation estimates over the field of view of an airborne or spaceborne weather radar are feasible for off-nadir incidence angles. This follows from the fact that the surface reference technique, which ...

Robert Meneghini; Liang Liao

2013-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "rain disdrometer disdrometer" 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.


481

Microphysical Interpretation of Multi-Parameter Radar Measurements in Rain. Part I: Interpretation of Polarization Measurements and Estimation of Raindrop Shapes  

Science Conference Proceedings (OSTI)

The backscattered electric field received by a radar is related to the transmitted field by a backscatter matrix. In the case of single raindrops the elements in this matrix are determined by raindrop size and shape. At long radar wavelength ...

A. R. Jameson

1983-07-01T23:59:59.000Z

482

Microphysical Interpretation of Multi-Parameter Radar Measurements in Rain. Part II: Estimation of Raindrop Distribution Parameters by Combined Dual-Wavelength and Polarization Measurements  

Science Conference Proceedings (OSTI)

The radar reflectivity weighted mean axis ratio R¯ and the variance of the axis ratio distribution ?R2 of an ensemble of raindrops can be estimated from polarization radar measurements. If the shape function relating axis ratio to drop size is ...

A. R. Jameson

1983-07-01T23:59:59.000Z

483

Observational Evidence of the Influence of the Qinghai-Xizang (Tibet) Plateau on the Occurrence of Heavy Rain and Severe Convective Storms in China  

Science Conference Proceedings (OSTI)

The advance and distribution of the belts of rainfall and heavy rainfall in China are closely related to sudden seasonal changes in the general circulation over East Asia. but the latter, to a great extent, may be the result of thermal and ...

Shi-yen Tao; Yi-hui Ding

1981-01-01T23:59:59.000Z

484

Large-Scale Circulation Patterns Associated with Heavy Spring Rain Events over Taiwan in Strong ENSO and Non-ENSO Years  

Science Conference Proceedings (OSTI)

Daily rainfall data at 15 stations in Taiwan and the grid dataset of the National Centers for Environmental Prediction–National Center for Atmospheric Research during the period of February–March 1951–2000 were used to reveal the characteristics ...

Zhihong Jiang; George Tai-Jen Chen; Ming-Chin Wu

2003-08-01T23:59:59.000Z

485

Characteristics of Low-Level Jets over Northern Taiwan in Mei-Yu Season and Their Relationship to Heavy Rain Events  

Science Conference Proceedings (OSTI)

The present study investigates the characteristics of low-level jets (LLJs) (?12.5 m s?1) below 600 hPa over northern Taiwan in the mei-yu season and their relationship to heavy rainfall events (?50 mm in 24 h) through the use of 12-h sounding ...

George Tai-Jen Chen; Chung-Chieh Wang; David Ta-Wei Lin

2005-01-01T23:59:59.000Z

486

Parameterization of Canopy Structure and Leaf-Level Gas Exchange for an Eastern Amazonian Tropical Rain Forest (Tapajós National Forest, Pará, Brazil)  

Science Conference Proceedings (OSTI)

Carbon flux of Amazonian primary forest vegetation has been shown to vary both spatially and temporally. Process-based models are adequate tools to understand the basis of such variation and can also provide projections to future scenarios. The ...

Tomas F. Domingues; Joseph A. Berry; Luiz A. Martinelli; Jean P. H. B. Ometto; James R. Ehleringer

2005-10-01T23:59:59.000Z

487

Statistics of Drop Size Distribution parameters and rain rates for Stratiform and Convective precipitation during the North-Australian wet season  

Science Conference Proceedings (OSTI)

C-band polarimetric radar measurements spanning two wet seasons are used to study the effects of the large-scale environment on the statistical properties of stratiform and convective rainfall around Darwin, Australia. The rainfall physical ...

Guillaume Penide; Vickal V. Kumar; Alain Protat; Peter T. May

488

Use of a Radar Simulator on the Output Fields from a Numerical Mesoscale Model to Analyze X-Band Rain Estimators  

Science Conference Proceedings (OSTI)

A full radar simulator, which works with the 3D output fields from a numerical mesoscale model, has been developed. This simulator uses a T-matrix code to calculate synthetic radar measurements, accounts for both backscattering and propagation ...

E-P. Zahiri; M. Gosset; J-P. Lafore; V. Gouget

2008-03-01T23:59:59.000Z

489

Modulation of the Diurnal Cycle of Rainfall Associated with the MJO Observed by a Dense Hourly Rain Gauge Network at Sarawak, Borneo  

Science Conference Proceedings (OSTI)

This study investigates spatiotemporal characteristics of the diurnal cycle (DC) of rainfall over Sarawak in northwest Borneo Island, associated with large-scale intraseasonal disturbances represented by the Madden–Julian oscillation (MJO). This ...

Hironari Kanamori; Tetsuzo Yasunari; Koichiro Kuraji

2013-07-01T23:59:59.000Z

490

1  

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

Figure 2. The infrared sky imager at the SGP CF. Dynamic Rain Gauge Calibrator A new dynamic rain gauge calibrator has been built and is being used to calibrate rain...

491

RAINSAT. A One Year Evaluation of a Bispectral Method for the Analysis and Short-Range Forecasting of Precipitation Areas  

Science Conference Proceedings (OSTI)

RAINSAT uses under data to calibrate GOES visible and infra data in terms of probability of rain. It produces probability of rain maps and 3 h forecast probability of rain maps by extrapolation.

Patrick King; Tsoi-Ching Yip; J. David Steenbergen

1989-06-01T23:59:59.000Z

492

Improving Global Model Precipitation Forecasts over India Using Downscaling and the FSU Superensemble. Part II: Seasonal Climate  

Science Conference Proceedings (OSTI)

This study addresses seasonal forecasts of rains over India using the following components: high-resolution rain gauge–based rainfall data covering the years 1987–2001, rain-rate initialization, four global atmosphere–ocean coupled models, a ...

Arindam Chakraborty; T. N. Krishnamurti

2009-09-01T23:59:59.000Z

493

Page not found | Department of Energy  

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

and rain. http:energy.govenergysaverarticlessolar-decathlon-rain-and-shine Article Solar Decathlon: How Do WE Do Efficiency? The weather is cooling off, the trees look...

494

Indoor air movement acceptability and thermal comfort in hot-humid climates  

E-Print Network (OSTI)

is heavily weighted towards hydroelectricity, accounting forof rain to drive hydroelectricity generation) and inadequatelack of rain for the hydroelectricity based system) and poor

Candido, Christhina Maria

2010-01-01T23:59:59.000Z

495

PowerPoint Presentation  

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

Radius (um) Temperature (degree Celsius) Case 2 Heavy pollution Typical summer monsoon rain belt TMI Rainfall PR Rainfall Area Rainnon-Rain Discrepancy RH Cloud top T A...

496

The Potential Use of Summer Rainfall Enhancement in Illinois. Part II: Integration of Factors Affecting Enhancement Projects and Future Research  

Science Conference Proceedings (OSTI)

Rain-yield findings were integrated with the average incidence of rain days and areas distribution of rain in a potential rain-modification area in Illinois to simulate regional aspects of a cloud-seeding project over a 13 000 km2 area. Potential ...

Stanley A. Changnon

1993-03-01T23:59:59.000Z

497

Gridded Hourly Precipitation Analysis from High-Density Rain Gauge Network over the Yangtze–Huai Rivers Basin during the 2007 Mei-Yu Season and Comparison with CMORPH  

Science Conference Proceedings (OSTI)

Heavy rainfall hit the Yangtze–Huai Rivers basin (YHRB) of east China several times during the prolonged 2007 mei-yu season, causing the worst flood since 1954. There has been an urgent need for attaining and processing high-quality, kilometer-...

Yali Luo; Weimiao Qian; Renhe Zhang; Da-Lin Zhang

2013-08-01T23:59:59.000Z

498

Drop Size Ambiguities in the Retrieval of Precipitation Profiles from Dual-Frequency Radar Measurements  

Science Conference Proceedings (OSTI)

The threat of flooding from landfalling tropical cyclones is a function of the local variation in rain rate and rain accumulation. To date, these have been inferred from single-frequency radar reflectivity measurements. However, the Tropical ...

Ziad S. Haddad; Jonathan P. Meagher; Stephen L. Durden; Eric A. Smith; Eastwood Im

2006-01-01T23:59:59.000Z

499

A Real-Time Gridded Crop Model for Assessing Spatial Drought Stress on Crops in the Southeastern United States  

Science Conference Proceedings (OSTI)

The severity of drought has many implications for society. Its impacts on rain-fed agriculture are especially direct, however. The southeastern United States, with substantial rain-fed agriculture and large variability in growing-season ...

Richard T. McNider; John R. Christy; Don Moss; Kevin Doty; Cameron Handyside; Ashutosh Limaye; Axel Garcia y Garcia; Gerrit Hoogenboom

2011-07-01T23:59:59.000Z

500

Assessing Satellite-Based Rainfall Estimates in Semiarid Watersheds Using the USDA-ARS Walnut Gulch Gauge Network and TRMM PR  

Science Conference Proceedings (OSTI)

The rain gauge network associated with the Walnut Gulch Experimental Watershed (WGEW) in southeastern Arizona provides a unique opportunity for direct comparisons of in situ measurements and satellite-based instantaneous rain rate estimates like ...

Eyal Amitai; Carl L. Unkrich; David C. Goodrich; Emad Habib; Bryson Thill

2012-10-01T23:59:59.000Z