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Note: This page contains sample records for the topic "midlatitude continental convective" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

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)

2

ARM - Midlatitude Continental Convective Clouds  

Science Conference Proceedings (OSTI)

Convective processes play a critical role in the Earth's energy balance through the redistribution of heat and moisture in the atmosphere and their link to the hydrological cycle. Accurate representation of convective processes in numerical models is vital towards improving current and future simulations of Earths climate system. Despite improvements in computing power, current operational weather and global climate models are unable to resolve the natural temporal and spatial scales important to convective processes and therefore must turn to parameterization schemes to represent these processes. In turn, parameterization schemes in cloud-resolving models need to be evaluated for their generality and application to a variety of atmospheric conditions. Data from field campaigns with appropriate forcing descriptors have been traditionally used by modelers for evaluating and improving parameterization schemes.

Mike Jensen; Mary Jane Bartholomew; Anthony Del Genio; Scott Giangrande; Pavlos Kollias

2012-01-19T23:59:59.000Z

3

ARM - Midlatitude Continental Convective Clouds  

DOE Data Explorer (OSTI)

Convective processes play a critical role in the Earth's energy balance through the redistribution of heat and moisture in the atmosphere and their link to the hydrological cycle. Accurate representation of convective processes in numerical models is vital towards improving current and future simulations of Earths climate system. Despite improvements in computing power, current operational weather and global climate models are unable to resolve the natural temporal and spatial scales important to convective processes and therefore must turn to parameterization schemes to represent these processes. In turn, parameterization schemes in cloud-resolving models need to be evaluated for their generality and application to a variety of atmospheric conditions. Data from field campaigns with appropriate forcing descriptors have been traditionally used by modelers for evaluating and improving parameterization schemes.

Mike Jensen; Mary Jane Bartholomew; Anthony Del Genio; Scott Giangrande; Pavlos Kollias

4

BNL | Midlatitude Continental Convective Clouds Experiment (MC3E)  

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

Midlatitude Continental Convective Clouds Experiment Midlatitude Continental Convective Clouds Experiment Convective processes play a critical role in the Earth's energy balance through the redistribution of heat and moisture in the atmosphere and their link to the hydrological cycle. Accurate representation of convective processes in numerical models is vital towards improving current and future simulations of Earths climate system. Despite improvements in computing power, current operational weather and global climate models are unable to resolve the natural temporal and spatial scales important to convective processes and therefore must turn to parameterization schemes to represent these processes. In turn, parameterization schemes in cloud-resolving models need to be evaluated for their generality and application to a

5

ARM - Field Campaign - Midlatitude Continental Convective Clouds Experiment  

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

Experiment Experiment (MC3E): Multi-Frequency Profilers Related Campaigns Midlatitude Continental Convective Clouds Experiment (MC3E) 2011.04.22, Jensen, 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): Multi-Frequency Profilers 2011.04.22 - 2011.06.06 Lead Scientist : Christopher Williams For data sets, see below. Description The scientific focus was to study the vertical structure of precipitation in a vertical column over the SGP Central Facility. These multi-frequency profiler observations enabled directly measuring the vertical air motion and retrieving the raindrop size distributions from near the surface to just under the freezing level. These profilers were deployed during MC3E

6

Midlatitude Continental Convective Clouds Experiment (MC3E)  

SciTech Connect

Convective processes play a critical role in the Earth’s energy balance through the redistribution of heat and moisture in the atmosphere and subsequent impacts on the hydrologic cycle. Global observation and accurate representation of these processes in numerical models is vital to improving our current understanding and future simulations of Earth’s climate system. Despite improvements in computing power, current operational weather and global climate models are unable to resolve the natural temporal and spatial scales that are associated with convective and stratiform precipitation processes; therefore, they must turn to parameterization schemes to represent these processes. In turn, the physical basis for these parameterization schemes needs to be evaluated for general application under a variety of atmospheric conditions. Analogously, space-based remote sensing algorithms designed to retrieve related cloud and precipitation information for use in hydrological, climate, and numerical weather prediction applications often rely on physical “parameterizations” that reliably translate indirectly related instrument measurements to the physical quantity of interest (e.g., precipitation rate). Importantly, both spaceborne retrieval algorithms and model convective parameterization schemes traditionally rely on field campaign data sets as a basis for evaluating and improving the physics of their respective approaches. The Midlatitude Continental Convective Clouds Experiment (MC3E) will take place in central Oklahoma during the April–May 2011 period. The experiment is a collaborative effort between the U.S. Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) Climate Research Facility and the National Aeronautics and Space Administration’s (NASA) Global Precipitation Measurement (GPM) mission Ground Validation (GV) program. The field campaign leverages the unprecedented observing infrastructure currently available in the central United States, combined with an extensive sounding array, remote sensing and in situ aircraft observations, NASA GPM ground validation remote sensors, and new ARM instrumentation purchased with American Recovery and Reinvestment Act funding. The overarching goal is to provide the most complete characterization of convective cloud systems, precipitation, and the environment that has ever been obtained, providing constraints for model cumulus parameterizations and space-based rainfall retrieval algorithms over land that have never before been available. Several different components of convective cloud and precipitation processes tangible to both the convective parameterization and precipitation retrieval algorithm problem are targeted, such as preconvective environment and convective initiation, updraft/downdraft dynamics, condensate transport and detrainment, precipitation and cloud microphysics, spatial and temporal variability of precipitation, influence on the environment and radiation, and a detailed description of the large-scale forcing.

Jensen, MP; Petersen, WA; Del Genio, AD; Giangrande, SE; Heymsfield, A; Heymsfield, G; Hou, AY; Kollias, P; Orr, B; Rutledge, SA; Schwaller, MR; Zipser, E

2010-04-01T23:59:59.000Z

7

ARM - Midlatitude Continental Convective Clouds (jensen-sonde)  

DOE Data Explorer (OSTI)

A major component of the Mid-latitude Continental Convective Clouds Experiment (MC3E) field campaign was the deployment of an enhanced radiosonde array designed to capture the vertical profile of atmospheric state variables (pressure, temperature, humidity wind speed and wind direction) for the purpose of deriving the large-scale forcing for use in modeling studies. The radiosonde array included six sites (enhanced Central Facility [CF-1] plus five new sites) launching radiosondes at 3-6 hour sampling intervals. The network will cover an area of approximately (300)2 km2 with five outer sounding launch sites and one central launch location. The five outer sounding launch sites are: S01 Pratt, KS [ 37.7oN, 98.75oW]; S02 Chanute, KS [37.674, 95.488]; S03 Vici, Oklahoma [36.071, -99.204]; S04 Morris, Oklahoma [35.687, -95.856]; and S05 Purcell, Oklahoma [34.985, -97.522]. Soundings from the SGP Central Facility during MC3E can be retrieved from the regular ARM archive. During routine MC3E operations 4 radiosondes were launched from each of these sites (approx. 0130, 0730, 1330 and 1930 UTC). On days that were forecast to be convective up to four additional launches were launched at each site (approx. 0430, 1030, 1630, 2230 UTC). There were a total of approximately 14 of these high frequency launch days over the course of the experiment.

Mike Jensen; Jennifer Comstock; Anthony Del Genio; Scott Giangrande; Pavlos Kollias

8

ARM - Midlatitude Continental Convective Clouds (jensen-sonde)  

SciTech Connect

A major component of the Mid-latitude Continental Convective Clouds Experiment (MC3E) field campaign was the deployment of an enhanced radiosonde array designed to capture the vertical profile of atmospheric state variables (pressure, temperature, humidity wind speed and wind direction) for the purpose of deriving the large-scale forcing for use in modeling studies. The radiosonde array included six sites (enhanced Central Facility [CF-1] plus five new sites) launching radiosondes at 3-6 hour sampling intervals. The network will cover an area of approximately (300)2 km2 with five outer sounding launch sites and one central launch location. The five outer sounding launch sites are: S01 Pratt, KS [ 37.7oN, 98.75oW]; S02 Chanute, KS [37.674, 95.488]; S03 Vici, Oklahoma [36.071, -99.204]; S04 Morris, Oklahoma [35.687, -95.856]; and S05 Purcell, Oklahoma [34.985, -97.522]. Soundings from the SGP Central Facility during MC3E can be retrieved from the regular ARM archive. During routine MC3E operations 4 radiosondes were launched from each of these sites (approx. 0130, 0730, 1330 and 1930 UTC). On days that were forecast to be convective up to four additional launches were launched at each site (approx. 0430, 1030, 1630, 2230 UTC). There were a total of approximately 14 of these high frequency launch days over the course of the experiment.

Mike Jensen; Jennifer Comstock; Anthony Del Genio; Scott Giangrande; Pavlos Kollias

2012-01-19T23:59:59.000Z

9

ARM - Midlatitude Continental Convective Clouds (comstock-hvps)  

DOE Data Explorer (OSTI)

Convective processes play a critical role in the Earth's energy balance through the redistribution of heat and moisture in the atmosphere and their link to the hydrological cycle. Accurate representation of convective processes in numerical models is vital towards improving current and future simulations of Earths climate system. Despite improvements in computing power, current operational weather and global climate models are unable to resolve the natural temporal and spatial scales important to convective processes and therefore must turn to parameterization schemes to represent these processes. In turn, parameterization schemes in cloud-resolving models need to be evaluated for their generality and application to a variety of atmospheric conditions. Data from field campaigns with appropriate forcing descriptors have been traditionally used by modelers for evaluating and improving parameterization schemes.

Mike Jensen; Jennifer Comstock; Anthony Del Genio; Scott Giangrande; Pavlos Kollias

10

ARM - Midlatitude Continental Convective Clouds (comstock-hvps)  

Science Conference Proceedings (OSTI)

Convective processes play a critical role in the Earth's energy balance through the redistribution of heat and moisture in the atmosphere and their link to the hydrological cycle. Accurate representation of convective processes in numerical models is vital towards improving current and future simulations of Earths climate system. Despite improvements in computing power, current operational weather and global climate models are unable to resolve the natural temporal and spatial scales important to convective processes and therefore must turn to parameterization schemes to represent these processes. In turn, parameterization schemes in cloud-resolving models need to be evaluated for their generality and application to a variety of atmospheric conditions. Data from field campaigns with appropriate forcing descriptors have been traditionally used by modelers for evaluating and improving parameterization schemes.

Mike Jensen; Jennifer Comstock; Anthony Del Genio; Scott Giangrande; Pavlos Kollias

2012-01-06T23:59:59.000Z

11

ARM - Midlatitude Continental Convective Clouds - Single Column Model Forcing (xie-scm_forcing)  

Science Conference Proceedings (OSTI)

The constrained variational objective analysis approach described in Zhang and Lin [1997] and Zhang et al. [2001]was used to derive the large-scale single-column/cloud resolving model forcing and evaluation data set from the observational data collected during Midlatitude Continental Convective Clouds Experiment (MC3E), which was conducted during April to June 2011 near the ARM Southern Great Plains (SGP) site. The analysis data cover the period from 00Z 22 April - 21Z 6 June 2011. The forcing data represent an average over the 3 different analysis domains centered at central facility with a diameter of 300 km (standard SGP forcing domain size), 150 km and 75 km, as shown in Figure 1. This is to support modeling studies on various-scale convective systems.

Shaocheng Xie; Renata McCoy; Yunyan Zhang

2012-10-25T23:59:59.000Z

12

ARM - Midlatitude Continental Convective Clouds - Single Column Model Forcing (xie-scm_forcing)  

DOE Data Explorer (OSTI)

The constrained variational objective analysis approach described in Zhang and Lin [1997] and Zhang et al. [2001]was used to derive the large-scale single-column/cloud resolving model forcing and evaluation data set from the observational data collected during Midlatitude Continental Convective Clouds Experiment (MC3E), which was conducted during April to June 2011 near the ARM Southern Great Plains (SGP) site. The analysis data cover the period from 00Z 22 April - 21Z 6 June 2011. The forcing data represent an average over the 3 different analysis domains centered at central facility with a diameter of 300 km (standard SGP forcing domain size), 150 km and 75 km, as shown in Figure 1. This is to support modeling studies on various-scale convective systems.

Shaocheng Xie; Renata McCoy; Yunyan Zhang

13

ARM - Midlatitude Continental Convective Clouds - Ultra High Sensitivity Aerosol Spectrometer(tomlinson-uhsas)  

DOE Data Explorer (OSTI)

Ultra High Sensitivity Aerosol Spectrometer (UHSASA) A major component of the Mid-latitude Continental Convective Clouds Experiment (MC3E) field campaign was the deployment of an enhanced radiosonde array designed to capture the vertical profile of atmospheric state variables (pressure, temperature, humidity wind speed and wind direction) for the purpose of deriving the large-scale forcing for use in modeling studies. The radiosonde array included six sites (enhanced Central Facility [CF-1] plus five new sites) launching radiosondes at 3-6 hour sampling intervals. The network will cover an area of approximately (300)2 km2 with five outer sounding launch sites and one central launch location. The five outer sounding launch sites are: S01 Pratt, KS [ 37.7oN, 98.75oW]; S02 Chanute, KS [37.674, 95.488]; S03 Vici, Oklahoma [36.071, -99.204]; S04 Morris, Oklahoma [35.687, -95.856]; and S05 Purcell, Oklahoma [34.985, -97.522]. Soundings from the SGP Central Facility during MC3E can be retrieved from the regular ARM archive. During routine MC3E operations 4 radiosondes were launched from each of these sites (approx. 0130, 0730, 1330 and 1930 UTC). On days that were forecast to be convective up to four additional launches were launched at each site (approx. 0430, 1030, 1630, 2230 UTC). There were a total of approximately 14 of these high frequency launch days over the course of the experiment. These files contain brightness temperatures observed at Purcell during MC3E. The measurements were made with a 5 channel (22.235, 23.035, 23.835, 26.235, 30.000GHz) microwave radiometer at one minute intervals. The results have been separated into daily files and the day of observations is indicated in the file name. All observations were zenith pointing. Included in the files are the time variables base_time and time_offset. These follow the ARM time conventions. Base_time is the number seconds since January 1, 1970 at 00:00:00 for the first data point of the file and time_offset is the offset in seconds from base_time.

Jason Tomlinson; Mike Jensen

14

ARM - Midlatitude Continental Convective Clouds Microwave Radiometer Profiler (jensen-mwr)  

DOE Data Explorer (OSTI)

A major component of the Mid-latitude Continental Convective Clouds Experiment (MC3E) field campaign was the deployment of an enhanced radiosonde array designed to capture the vertical profile of atmospheric state variables (pressure, temperature, humidity wind speed and wind direction) for the purpose of deriving the large-scale forcing for use in modeling studies. The radiosonde array included six sites (enhanced Central Facility [CF-1] plus five new sites) launching radiosondes at 3-6 hour sampling intervals. The network will cover an area of approximately (300)2 km2 with five outer sounding launch sites and one central launch location. The five outer sounding launch sites are: S01 Pratt, KS [ 37.7oN, 98.75oW]; S02 Chanute, KS [37.674, 95.488]; S03 Vici, Oklahoma [36.071, -99.204]; S04 Morris, Oklahoma [35.687, -95.856]; and S05 Purcell, Oklahoma [34.985, -97.522]. Soundings from the SGP Central Facility during MC3E can be retrieved from the regular ARM archive. During routine MC3E operations 4 radiosondes were launched from each of these sites (approx. 0130, 0730, 1330 and 1930 UTC). On days that were forecast to be convective up to four additional launches were launched at each site (approx. 0430, 1030, 1630, 2230 UTC). There were a total of approximately 14 of these high frequency launch days over the course of the experiment. These files contain brightness temperatures observed at Purcell during MC3E. The measurements were made with a 5 channel (22.235, 23.035, 23.835, 26.235, 30.000GHz) microwave radiometer at one minute intervals. The results have been separated into daily files and the day of observations is indicated in the file name. All observations were zenith pointing. Included in the files are the time variables base_time and time_offset. These follow the ARM time conventions. Base_time is the number seconds since January 1, 1970 at 00:00:00 for the first data point of the file and time_offset is the offset in seconds from base_time.

Mike Jensen

15

ARM - Midlatitude Continental Convective Clouds - Ultra High Sensitivity Aerosol Spectrometer(tomlinson-uhsas)  

SciTech Connect

Ultra High Sensitivity Aerosol Spectrometer (UHSASA) A major component of the Mid-latitude Continental Convective Clouds Experiment (MC3E) field campaign was the deployment of an enhanced radiosonde array designed to capture the vertical profile of atmospheric state variables (pressure, temperature, humidity wind speed and wind direction) for the purpose of deriving the large-scale forcing for use in modeling studies. The radiosonde array included six sites (enhanced Central Facility [CF-1] plus five new sites) launching radiosondes at 3-6 hour sampling intervals. The network will cover an area of approximately (300)2 km2 with five outer sounding launch sites and one central launch location. The five outer sounding launch sites are: S01 Pratt, KS [ 37.7oN, 98.75oW]; S02 Chanute, KS [37.674, 95.488]; S03 Vici, Oklahoma [36.071, -99.204]; S04 Morris, Oklahoma [35.687, -95.856]; and S05 Purcell, Oklahoma [34.985, -97.522]. Soundings from the SGP Central Facility during MC3E can be retrieved from the regular ARM archive. During routine MC3E operations 4 radiosondes were launched from each of these sites (approx. 0130, 0730, 1330 and 1930 UTC). On days that were forecast to be convective up to four additional launches were launched at each site (approx. 0430, 1030, 1630, 2230 UTC). There were a total of approximately 14 of these high frequency launch days over the course of the experiment. These files contain brightness temperatures observed at Purcell during MC3E. The measurements were made with a 5 channel (22.235, 23.035, 23.835, 26.235, 30.000GHz) microwave radiometer at one minute intervals. The results have been separated into daily files and the day of observations is indicated in the file name. All observations were zenith pointing. Included in the files are the time variables base_time and time_offset. These follow the ARM time conventions. Base_time is the number seconds since January 1, 1970 at 00:00:00 for the first data point of the file and time_offset is the offset in seconds from base_time.

Jason Tomlinson; Mike Jensen

2012-02-28T23:59:59.000Z

16

ARM - Midlatitude Continental Convective Clouds Microwave Radiometer Profiler (jensen-mwr)  

SciTech Connect

A major component of the Mid-latitude Continental Convective Clouds Experiment (MC3E) field campaign was the deployment of an enhanced radiosonde array designed to capture the vertical profile of atmospheric state variables (pressure, temperature, humidity wind speed and wind direction) for the purpose of deriving the large-scale forcing for use in modeling studies. The radiosonde array included six sites (enhanced Central Facility [CF-1] plus five new sites) launching radiosondes at 3-6 hour sampling intervals. The network will cover an area of approximately (300)2 km2 with five outer sounding launch sites and one central launch location. The five outer sounding launch sites are: S01 Pratt, KS [ 37.7oN, 98.75oW]; S02 Chanute, KS [37.674, 95.488]; S03 Vici, Oklahoma [36.071, -99.204]; S04 Morris, Oklahoma [35.687, -95.856]; and S05 Purcell, Oklahoma [34.985, -97.522]. Soundings from the SGP Central Facility during MC3E can be retrieved from the regular ARM archive. During routine MC3E operations 4 radiosondes were launched from each of these sites (approx. 0130, 0730, 1330 and 1930 UTC). On days that were forecast to be convective up to four additional launches were launched at each site (approx. 0430, 1030, 1630, 2230 UTC). There were a total of approximately 14 of these high frequency launch days over the course of the experiment. These files contain brightness temperatures observed at Purcell during MC3E. The measurements were made with a 5 channel (22.235, 23.035, 23.835, 26.235, 30.000GHz) microwave radiometer at one minute intervals. The results have been separated into daily files and the day of observations is indicated in the file name. All observations were zenith pointing. Included in the files are the time variables base_time and time_offset. These follow the ARM time conventions. Base_time is the number seconds since January 1, 1970 at 00:00:00 for the first data point of the file and time_offset is the offset in seconds from base_time.

Mike Jensen

2012-02-01T23:59:59.000Z

17

The Kinematics of a Midlatitude, Continental Mesoscale Convective System and Its Mesoscale Vortex  

Science Conference Proceedings (OSTI)

The authors present a unique, scale-discriminating study of the environment-relative circulations within a mesoscale convective system (MCS) and mesoscale convective vortex (MCV). The MCS, a leading convective line and trailing stratiform region ...

Jason C. Knievel; Richard H. Johnson

2002-07-01T23:59:59.000Z

18

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

19

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

20

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

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


21

ARM - 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

22

Updraft and Downdraft Statistics of Simulated Tropical and Midlatitude Cumulus Convection  

Science Conference Proceedings (OSTI)

This paper presents a detailed analysis of updraft and downdraft statistics of simulated tropical oceanic and midlatitude continental cumulus convection, with an emphasis on the individual terms in the vertical momentum budget. Strong convective ...

Kuan-Man Xu; David A. Randall

2001-07-01T23:59:59.000Z

23

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

24

Similarity of Deep Continental Cumulus Convection as Revealed by a Three-Dimensional Cloud-Resolving Model  

Science Conference Proceedings (OSTI)

A three-dimensional cloud-resolving simulation of midlatitude continental convection during the Atmospheric Radiation Measurement (ARM) program summer 1997 intensive observation period (IOP) is used to study the similarity of several second and ...

Marat F. Khairoutdinov; David A. Randall

2002-09-01T23:59:59.000Z

25

Organizational Modes of Midlatitude Mesoscale Convective Systems  

Science Conference Proceedings (OSTI)

This paper discusses common modes of mesoscale convective organization. Using 2-km national composite reflectivity data, the authors investigated linear mesoscale convective systems (MCSs) that occurred in the central United States during May ...

Matthew D. Parker; Richard H. Johnson

2000-10-01T23:59:59.000Z

26

Midlatitude Continental Convective Clouds Experiment Science...  

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

aircraft will fly above and within the clouds while radar systems scan through the storm from multiple locations. At the same time, additional ground-based instruments will...

27

An Idealized Cloud-Resolving Framework for the Study of Midlatitude Diurnal Convection over Land  

Science Conference Proceedings (OSTI)

This paper introduces an idealized cloud-resolving modeling (CRM) framework for the study of midlatitude diurnal convection over land. The framework is used to study the feedbacks among soil, boundary layer, and diurnal convection. It includes a ...

Linda Schlemmer; Cathy Hohenegger; Jürg Schmidli; Christopher S. Bretherton; Christoph Schär

2011-05-01T23:59:59.000Z

28

Kinematic Vertical Motion and Relative Vorticity Profiles in a Long-Lived Midlatitude Convective System  

Science Conference Proceedings (OSTI)

Average kinematic vertical motion and relative vorticity profiles are presented for a long-lived midlatitude convective complex. A breakdown into active convective and stratiform precipitation regions shows very good agreement in the vertical ...

Lance F. Bosart

1986-06-01T23:59:59.000Z

29

Is Midlatitude Convection an Active or a Passive Player in Producing Global Circulation Patterns?  

Science Conference Proceedings (OSTI)

The ability of persistent midlatitude convective regions to influence hemispheric circulation patterns during the Northern Hemisphere summer is investigated. Global rainfall data over a 15-yr period indicate anomalously large July total rainfalls ...

David J. Stensrud; Jeffrey L. Anderson

2001-05-01T23:59:59.000Z

30

Factors Governing the Total Rainfall Yield from Continental Convective Clouds  

Science Conference Proceedings (OSTI)

Several important factors that govern the total rainfall from continental convective clouds were investigated by tracking thousands of convective cells in Israel and South Africa. The rainfall volume yield (Rvol) of the individual cells that ...

Daniel Rosenfeld; Abraham Gagin

1989-10-01T23:59:59.000Z

31

The Wake Uw in a Midlatitude Mesoseale Convective System Having Complex Convective Organintion  

Science Conference Proceedings (OSTI)

An analysis has been carried out of the surface pressure field in a highly complex mesoscale convective system that occurred on 3-4 June 1985 during the Oklahoma-Kansas Preliminary Regional Expeximent for STORM-Central (OK PRE-STORM). During its ...

Gregory J. Stumpf; Richard H. Johnson; Bradley F. Smull

1991-01-01T23:59:59.000Z

32

The Role of Entrainment in the Diurnal Cycle of Continental Convection  

Science Conference Proceedings (OSTI)

In continental convective environments, general circulation models typically produce a diurnal cycle of rainfall that peaks close to the noon maximum of insolation, hours earlier than the observed peak. One possible reason is insufficient ...

Anthony D. Del Genio; Jingbo Wu

2010-05-01T23:59:59.000Z

33

A Modeling Study on the Early Electrical Development of Tropical Convection: Continental and Oceanic (Monsoon) Storms  

Science Conference Proceedings (OSTI)

Numerical modeling studies of continental tropical and maritime tropical convection were conducted using the two-dimensional, nonhydrostatic, cloud electrification model developed at the South Dakota School of Mines and Technology. The model ...

Scot C. Randell; Steven A. Rutledge; Richard D. Farley; John H. Helsdon Jr.

1994-08-01T23:59:59.000Z

34

The Sensitivity of a Simulated Extratropical Mesoscale Convective System to Longwave Radiation and Ice-Phase Microphysics  

Science Conference Proceedings (OSTI)

A two-dimensional, nonhydrostatic version of the Colorado State University Regional Atmospheric Modeling System (RAMS) was applied to the simulation of a midlatitude, continental mesoscale convective system. A control simulation was established ...

Sue Chen; William R. Cotton

1988-12-01T23:59:59.000Z

35

Estimating the Orientation and Spacing of Midlatitude Linear Convective Boundary Layer Features: Cloud Streets  

Science Conference Proceedings (OSTI)

Linear features in a clear convective boundary layer (CBL) over the North Atlantic Ocean were studied during a weak cold air outbreak using a down-looking airborne lidar. Sequential lidar profiles were placed together and color coded to provide ...

S. H. Melfi; Stephen P. Palm

2012-01-01T23:59:59.000Z

36

A Climatology of Midlatitude Mesoscale Convective Vortices in the Rapid Update Cycle  

Science Conference Proceedings (OSTI)

Climatological characteristics of mesoscale convective vortices (MCVs) occurring in the state of Oklahoma during the late spring and summer of four years are investigated. The MCV cases are selected based on vortex detection by an objective ...

Eric P. James; Richard H. Johnson

2010-05-01T23:59:59.000Z

37

Interaction between Intraseasonal Oscillations of the Midlatitude Flow and Tropical Convection during 1979 Northern Summer: The Pacific Ocean  

Science Conference Proceedings (OSTI)

It has been inferred and illustrated by many studies in terms of outgoing longwave radiation (OLR) and velocity potential (?) that energy is input into the intraseasonal oscillation through tropical cumulus convection, especially over the monsoon ...

Tsing-Chang Chen; Ming-Chen Yen

1991-07-01T23:59:59.000Z

38

5, 1102911054, 2005 Convective gravity  

E-Print Network (OSTI)

ACPD 5, 11029­11054, 2005 Convective gravity waves at mid-latitudes Y. G. Choi et al. Title Page Discussions Wind-profiler observations of gravity waves produced by convection at mid-latitudes Y. G. Choi1­11054, 2005 Convective gravity waves at mid-latitudes Y. G. Choi et al. Title Page Abstract Introduction

Paris-Sud XI, Université de

39

Evolution of cloud-to-ground lightning characteristics within the convective region of a midlatitude squall line  

E-Print Network (OSTI)

The relationship between storm dynamics and cloud-to-ground (CG) lightning characteristics in the convective region of the 10-11 June 1985 PRE-STORM (Preliminary Regional Experiment for Stormscale Operational and Research Meteorology) squall line has been examined over a period of 49 minutes. Lightning data from the National Severe Storms Laboratory lightning detection network combined with seven dual-Doppler analyses provided a unique dataset in which to study this Mesoscale Convective System (MCS). The mature phase of this system passed through the dual-Doppler analysis domain during a period when the convective region made an apparent transition to a weaker convective state. For the overall system, the peak in flash rates was shown to lag the maximum in the vertical velocity by roughly 1 0 to 20 minutes. Cross-sectional analyses revealed numerous examples of this time lag along with a coincidence of descending mid-toupper level reflectivity features and increasing CG flash rates. Along-line dynamical differences in the convective region may have contributed to significant spatial variations in the flash rate. The northern portion of the line featured stronger, more continuous updrafts along with a relative sparseness of lightning strikes. The southern section displayed weaker, but more discrete cell evolution which coincided with a rather uniform and substantial number of CG strikes.

Billingsley, David Brian

1994-01-01T23:59:59.000Z

40

The Mesoscale Forcing of a Midlatitude Upper-Tropospheric Jet Streak by a Simulated Convective System. Part II: Kinetic Energy and Resolution Analysis  

Science Conference Proceedings (OSTI)

A kinetic energy (KE) analysis of the forcing of a mesoscale upper-tropospheric jet streak by organized diabaaic processes within the simulated convective system (SCS) that was discussed in Part I is presented in this study. The relative ...

Bart J. Wolf; Donald R. Johnson

1995-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "midlatitude continental convective" 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

Heat, Moisture, and Momentum Budgets of Isolated Deep Midlatitude and Tropical Convective Clouds as Diagnosed from Three-Dimensional Model Output. Part I: Control Experiments  

Science Conference Proceedings (OSTI)

This project uses a three-dimensional anelastic cloud model with a simple ice phase parameterization to evaluate the feedback between isolated deep convective clouds and their near surroundings. The horizontal Reynolds averaging approach of ...

Robert E. Schlesinger

1994-12-01T23:59:59.000Z

42

The Effect of Melting Processes on the Development of a Tropical and a Midlatitude Squall Line  

Science Conference Proceedings (OSTI)

Several sensitivity tests are performed to assess the effect of melting processes on the development of a midlatitude continental squall line and a tropical oceanic squall line. It is found that melting processes play an important role in the ...

W-K. Tao; J. R. Scala; B. Ferrier; J. Simpson

1995-06-01T23:59:59.000Z

43

Comments on “The Impact of the Ice Phase and Radiation on a Midlatitude Squall Line System”  

Science Conference Proceedings (OSTI)

This comment addresses two conclusions arising from a modeling study of Chin: that the contribution of mesoscale stratiform areas to large-scale heat and moisture budgets at midlatitudes is small compared to that associated with deep convection ...

Scott A. Braun; Robert A. Houze Jr.; Ming-Jen Yang

1996-05-01T23:59:59.000Z

44

Structures and Dynamics of Quasi-2D Mesoscale Convective Systems  

Science Conference Proceedings (OSTI)

Recently, three distinct archetypes for midlatitude linear mesoscale convective systems (MCSs) have been identified. This article focuses on the fundamentals of two of these archetypes: convective lines with trailing stratiform (TS) precipitation ...

Matthew D. Parker; Richard H. Johnson

2004-03-01T23:59:59.000Z

45

Balanced and Unbalanced Circulations in a Primitive Equation Simulation of a Midlatitude MCC. Part II: Analysis of Balance  

Science Conference Proceedings (OSTI)

A nonlinear balance condition, which permits the diagnosis of both balanced divergent and nondivergent flows, is presented. This analysis approach is applied to the results of a numerical simulation of a midlatitude mesoscale convective complex (...

Peter Q. Olsson; William R. Cotton

1997-02-01T23:59:59.000Z

46

Numerical Prediction of Convectively Driven Mesoscale Pressure Systems. Part I: Convective Parameterization  

Science Conference Proceedings (OSTI)

A parameterization formulation for incorporating the effects of midlatitude deep convection into mesoscale-numerical models is presented. The formulation is based on the hypothesis that the buoyant energy available to a parcel, in combination ...

J. M. Fritsch; C. F. Chappell

1980-08-01T23:59:59.000Z

47

Surface-Flux Regulation of the Coupling between Cumulus Convection and Baroclinic Waves  

Science Conference Proceedings (OSTI)

The authors examine the role of convection in the dynamics of eddy life cycles through numerical experiments using initial states that are baroclinically and conditionally unstable in midlatitudes. The location of wave-induced convection and its ...

William J. Gutowski Jr.; Weidong Jiang

1998-03-01T23:59:59.000Z

48

Aircraft Observation of Convection Waves over Southern Germany—A Case Study  

Science Conference Proceedings (OSTI)

A vertical cross section of 100 km × 10 km through a daytime midlatitude troposphere is analyzed using aircraft turbulence data with 1.5-m spatial resolution. Convectively forced internal gravity waves, also referred to as “convection waves,” ...

Thomas Hauf

1993-12-01T23:59:59.000Z

49

Simple Coupled Midlatitude Climate Models  

Science Conference Proceedings (OSTI)

A set of simple analytical models is presented and evaluated for interannual to decadal coupled ocean–atmosphere modes at midlatitudes. The atmosphere and ocean are each in Sverdrup balance at these long timescales. The atmosphere’s temperature ...

Lynne D. Talley

1999-08-01T23:59:59.000Z

50

COPT 81: A Field Experiment Designed for the Study of Dynamics and Electrical Activity of Deep Convection in Continental Tropical Regions  

Science Conference Proceedings (OSTI)

During May and June 1981 several French research organizations, the University of Abidjan (Ivory coast) and the Agency for security of Aeronautical Navigation (ASECNA), participated in the observational field program called “Convection Profonde ...

Gilles Sommeria; J. Testud

1984-01-01T23:59:59.000Z

51

Reply to “Comments on ‘Preconditioning Deep Convection with Cumulus Congestus’”  

Science Conference Proceedings (OSTI)

In his comment, D. M. Schultz asked for clarification concerning (i) the validity of the results of C. Hohenegger and B. Stevens for the development of convection over the midlatitudes and (ii) the exact meaning and computation of the term “...

Cathy Hohenegger; Bjorn Stevens

2013-12-01T23:59:59.000Z

52

The Influence of Buoyancy Flux from Estuaries on Continental Shelf Circulation  

Science Conference Proceedings (OSTI)

The release of freshwater from a midlatitude estuary to the continental shelf is modeled numerically as a Rossby adjustment problem using a primitive equation model. As the initial salinity front is relaxed, a first baroclinic-mode Kelvin wave ...

Andrew J. Weaver; William W. Hsieh

1987-11-01T23:59:59.000Z

53

Mesoscale Momentum Budget in a Midlatitude Squall Line: A Numerical Case Study  

Science Conference Proceedings (OSTI)

A meso?-scale momentum budget and its effect on larger-scale mean flow in a midlatitude mesoscale convective system are investigated using a numerical simulation of an intense squall line that occurred during 10–11 June 1985 PRE-STORM. It is ...

Kun Gao; Da-Lin Zhang; Mitchell W. Moncrieff; Han-Ru Cho

1990-05-01T23:59:59.000Z

54

Exploring the Land–Ocean Contrast in Convective Vigor Using Islands  

Science Conference Proceedings (OSTI)

Moist convection is well known to be generally more intense over continental than maritime regions, with larger updraft velocities, graupel, and lightning production. This study explores the transition from maritime to continental convection by ...

F. J. Robinson; S. C. Sherwood; D. Gerstle; C. Liu; D. J. Kirshbaum

2011-03-01T23:59:59.000Z

55

An Analysis of the Soil Moisture Feedback on Convective and Stratiform Precipitation  

Science Conference Proceedings (OSTI)

Land–atmosphere interactions in midlatitude continental regions are particularly active during the warm season. It is still unclear whether and under what circumstances these interactions may involve positive or negative feedbacks between soil ...

Lorenzo Alfieri; Pierluigi Claps; Paolo D’Odorico; Francesco Laio; Thomas M. Over

2008-04-01T23:59:59.000Z

56

Semiprognostic Tests of Kuo–Type Cumulus Parameterization Schemes in an Extratropical Convective System  

Science Conference Proceedings (OSTI)

Heat and moisture budgets associated with a midlatitude convective system (10–11 April 1979) are used to evaluate several versions of Kuo-type cumulus parameterization schemes on a semiprognostic basis.

Ying-Hwa Kuo; Richard A. Anthes

1984-08-01T23:59:59.000Z

57

The Role of Momentum Transport in the Motion of a Quasi-Idealized Mesoscale Convective System  

Science Conference Proceedings (OSTI)

Momentum transport is examined in a simulated midlatitude mesoscale convective system (MCS) to investigate its contribution to MCS motion. Momentum budgets are computed using model output to quantify the role of specific processes in determining ...

Kelly M. Mahoney; Gary M. Lackmann; Matthew D. Parker

2009-10-01T23:59:59.000Z

58

Heating, Moisture, and Water Budgets of Tropical and Midlatitude Squall Lines: Comparisons and Sensitivity to Longwave Radiation  

Science Conference Proceedings (OSTI)

A two-dimensional, time-dependent, and nonhydrostatic numerical cloud model is used to estimate the heating (Q1, moisture (Q2), and water budgets in the convective and stratiform regions for a tropical and a midlatitude squall line (EMEX and PRE-...

W. -K. Tao; J. Simpson; C. H. Sui; B. Ferrier; S. Lang; J. Scala; M. D. Chou; K. Pickering

1993-03-01T23:59:59.000Z

59

Continental drilling  

DOE Green Energy (OSTI)

The Workshop on Continental Drilling was convened to prepare a report for submission to the US Geodynamics Committee with respect to the contribution that could be made by land drilling to resolve major problems of geodynamics and consider the mechanisms by which the responsibility for scientific planning, establishment of priorities, administration, and budgeting for a land-drilling program within the framework of the aims of the Geodynamics Project would best be established. A new and extensive program to study the continental crust is outlined in this report. The Workshop focused on the following topics: processes in the continental crust (mechanism of faulting and earthquakes, hydrothermal systems and active magma chambers); state and structure of the continental crust (heat flow and thermal structure of the crust; state of ambient stress in the North American plate; extent, regional structure, and evolution of crystalline continental crust); short hole investigations; present state and needs of drilling technology; drill hole experimentation and instrumentation; suggestions for organization and operation of drilling project; and suggested level of effort and funding. Four recommendations are set down. 8 figures, 5 tables. (RWR)

Shoemaker, E.M. (ed.)

1975-01-01T23:59:59.000Z

60

Is the Midlatitude Zonal Flow Absolutely Unstable?  

Science Conference Proceedings (OSTI)

An analysis is performed of the growth and propagation of unstable baroclinic wave packets in relatively realistic midlatitude zonal currents. The absolute growth rates are calculated, incorporating the effects of both Ekman friction and ...

S. J. Lin; R. T. Pierrehumbert

1993-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "midlatitude continental convective" 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

Stochastic Dynamics of the Midlatitude Atmospheric Jet  

Science Conference Proceedings (OSTI)

The innate tendency of the background straining field of the midlatitude atmospheric jet to preferentially amplify a subset of disturbances produces a characteristic response to stochastic perturbation whether the perturbations are internally ...

Brian F. Farrell; Peteros J. Ioannou

1995-05-01T23:59:59.000Z

62

Precipitation and Cloud Structure in Midlatitude Cyclones  

Science Conference Proceedings (OSTI)

Composite mean fields and probability distribution functions (PDFs) of rain rate, cloud type and cover, cloud-top temperature, surface wind velocity, and water vapor path (WVP) are constructed using satellite observations of midlatitude cyclones ...

Paul R. Field; Robert Wood

2007-01-01T23:59:59.000Z

63

Sensitivity of a Cloud-Resolving Simulation of the Genesis of a Mesoscale Convective System to Horizontal Heterogeneities in Soil Moisture Initialization  

Science Conference Proceedings (OSTI)

This study examines the sensitivity of varying the horizontal heterogeneities of the soil moisture initialization (SMI) in the cloud-resolving grid of a real-data simulation of a midlatitude mesoscale convective system (MCS) during its genesis ...

William Y. Y. Cheng; William R. Cotton

2004-10-01T23:59:59.000Z

64

Northern and Mid-Latitude Soil Data Released  

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

and Mid-Latitude Soil Data Released The ORNL DAAC announces the release of the data set "Northern and Mid-Latitude Soil Database, Version 1." This data set was developed...

65

Convectively Driven Mixing in the Bottom Boundary Layer  

Science Conference Proceedings (OSTI)

Closely spaced vertical profiles through the bottom boundary layer over a sloping continental shelf during relaxation from coastal upwelling reveal structure that is consistent with convectively driven mixing. Parcels of fluid were observed ...

J. N. Moum; A. Perlin; J. M. Klymak; M. D. Levine; T. Boyd; P. M. Kosro

2004-10-01T23:59:59.000Z

66

Laboratory Models of Bay-Type Continental Shelves in the Winter  

Science Conference Proceedings (OSTI)

A laboratory experiment consisting of a shallow sea of constant depth bounded by a deep ocean through a uniformly sloping continental rise was conducted. The experiment is cooled from above, and there is a region that exhibits sinking convection ...

Takashige Sugimoto; John A. Whitehead

1983-10-01T23:59:59.000Z

67

Patterns of Convection in the Tropical Western Pacific  

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

Patterns of Convection in the Tropical Western Pacific Patterns of Convection in the Tropical Western Pacific J. H. Mather Pacific Northwest National Laboratory Richland, Washington Introduction Convection is ubiquitous throughout the maritime continent region. However, the frequency of convec- tion is not uniform. While much of this region does not experience seasons to the same degree as one finds in mid-latitudes, the annual cycle of the sun's passage does have a large impact on convection throughout the maritime continent and the tropical western Pacific. The distribution of islands also affects convection in a variety of ways. Atmospheric Radiation Measurement (ARM) Program has three sites in the Tropical Western Pacific (TWP) region, illustrated in Figure 1. The sites are located on Manus, Nauru, and at Darwin, Australia.

68

The Influence of Time-Dependent Melting on the Dynamics and Precipitation Production in Maritime and Continental Storm Clouds  

Science Conference Proceedings (OSTI)

Simulations of one maritime and four continental observed cases of deep convection are performed with the Hebrew University Cloud Model that has spectral bin microphysics. The maritime case is from observations made on 18 September 1974 during ...

Vaughan T. J. Phillips; Andrei Pokrovsky; Alexander Khain

2007-02-01T23:59:59.000Z

69

Numerical Simulation of a Midlatitude Squall Line in Two Dimensions  

Science Conference Proceedings (OSTI)

A two-dimensional, anelastic cloud model was used in attempts to numerically replicate the observed structure of a midlatitude squall line. Initial conditions were adapted from observations of the 22 May 1976 Oklahoma line. Model simulations were ...

Robert G. Fovell; Yoshi Ogura

1988-12-01T23:59:59.000Z

70

The Momentum Budget of an Intense Midlatitude Squall Line  

Science Conference Proceedings (OSTI)

Rawinsonde data from OK PRE-STORM are used to calculate the momentum budgets of an intense midlatitude squall-line system with a trailing stratiform region. Budgets have been computed at three separate times during the mature through dissipating ...

William A. Gallus Jr.; Richard H. Johnson

1992-03-01T23:59:59.000Z

71

The Effects of Orography on Midlatitude Northern Hemisphere Dry Climates  

Science Conference Proceedings (OSTI)

The role of mountains in maintaining extensive midlatitude arid regions in the Northern Hemisphere was investigated using simulations from the GFDL Global Climate Model with and without orography. In the integration with mountains, dry climates ...

A. J. Broccoli; S. Manabe

1992-11-01T23:59:59.000Z

72

Evaluation of Passive Microwave Precipitation Algorithms in Wintertime Midlatitude Situations  

Science Conference Proceedings (OSTI)

The second intercomparison project of the Global Precipitation Climatology Project examined the estimation of midlatitude, cool-season precipitation. As part of that effort, the authors report here on the results of two microwave techniques the ...

Andrew J. Negri; Eric J. Nelkin; Robert F. Adler; George J. Huffman; Christian Kummerow

1995-02-01T23:59:59.000Z

73

Airflow Through Midlatitude Cyclones and the Comma Cloud Pattern  

Science Conference Proceedings (OSTI)

Airflow through a developing midlatitude disturbance is analyzed in a relative-wind isentropic system in order to provide insight into how the cloud pattern evolves into the familiar comma shape. The model presented makes use of various concepts ...

Toby N. Carlson

1980-10-01T23:59:59.000Z

74

CAPE and Convective Events in the Southwest during the North American Monsoon  

Science Conference Proceedings (OSTI)

The relationship between atmospheric stability, measured as CAPE, and deep precipitating convection has been widely studied but is not definitive. In the maritime tropics, CAPE and precipitation are usually inversely correlated. In continental ...

David K. Adams; Enio P. Souza

2009-01-01T23:59:59.000Z

75

A Shallow-Convection Parameterization for Mesoscale Models. Part I: Submodel Description and Preliminary Applications  

Science Conference Proceedings (OSTI)

A shallow-convection parameterization suitable for both marine and continental regimes is developed for use in mesoscale models. The scheme is closely associated with boundary layer turbulence processes and can transition to either a deep-...

Aijun Deng; Nelson L. Seaman; John S. Kain

2003-01-01T23:59:59.000Z

76

Convection towers  

DOE Patents (OSTI)

Convection towers which are capable of cleaning the pollution from large quantities of air and of generating electricity utilize the evaporation of water sprayed into the towers to create strong airflows and to remove pollution from the air. Turbines in tunnels at the skirt section of the towers generate electricity. Other embodiments may also provide fresh water, and operate in an updraft mode.

Prueitt, Melvin L. (Los Alamos, NM)

1994-01-01T23:59:59.000Z

77

Convection towers  

DOE Patents (OSTI)

Convection towers which are capable of cleaning the pollution from large quantities of air, of generating electricity, and of producing fresh water utilize the evaporation of water sprayed into the towers to create strong airflows and to remove pollution from the air. Turbines in tunnels at the skirt section of the towers generate electricity, and condensers produce fresh water. 6 figs.

Prueitt, M.L.

1996-01-16T23:59:59.000Z

78

Convection towers  

DOE Patents (OSTI)

Convection towers which are capable of cleaning the pollution from large quantities of air, of generating electricity, and of producing fresh water utilize the evaporation of water sprayed into the towers to create strong airflows and to remove pollution from the air. Turbines in tunnels at the skirt section of the towers generate electricity, and condensers produce fresh water.

Prueitt, Melvin L. (Los Alamos, NM)

1996-01-01T23:59:59.000Z

79

Convection towers  

DOE Patents (OSTI)

Convection towers which are capable of cleaning the pollution from large quantities of air, of generating electricity, and of producing fresh water utilize the evaporation of water sprayed into the towers to create strong airflows and to remove pollution from the air. Turbines in tunnels at the skirt section of the towers generate electricity, and condensers produce fresh water.

Prueitt, Melvin L. (Los Alamos, NM)

1995-01-01T23:59:59.000Z

80

Continental Shelf Fishing  

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

Location: NA Country: NA Date: NA Question: Why do most commercial fisherman don't fish beyond the continental shelf? Replies: The deep waters of the ocean offer little food...

Note: This page contains sample records for the topic "midlatitude continental convective" 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

Convection towers  

DOE Patents (OSTI)

Convection towers which are capable of cleaning the pollution from large quantities of air and of generating electricity utilize the evaporation of water sprayed into the towers to create strong airflows and to remove pollution from the air. Turbines in tunnels at the skirt section of the towers generate electricity. Other embodiments may also provide fresh water, and operate in an updraft mode. 5 figures.

Prueitt, M.L.

1994-02-08T23:59:59.000Z

82

Changes in the Relationship between ENSO and Asia–Pacific Midlatitude Winter Atmospheric Circulation  

Science Conference Proceedings (OSTI)

Interdecadal changes in the relationship between El Niño–Southern Oscillation (ENSO) and midlatitude atmospheric circulation are investigated in this study. Comparison of associations between ENSO and midlatitude atmospheric circulation anomalies ...

Shengping He; Huijun Wang; Jiping Liu

2013-05-01T23:59:59.000Z

83

An Observational Study of Tropical–Midlatitude Interaction on Intraseasonal Time Scales during Winter  

Science Conference Proceedings (OSTI)

Eight Northern Hemisphere winters of five- and ten-day average midlatitude 500 mb heights and tropical outgoing IR are used in a correlative study of tropical-midlatitude interaction. The seasonal cycle and interannual variability are removed so ...

Brant Liebmann; Dennis L. Hartmann

1984-12-01T23:59:59.000Z

84

CONVECTION REACTOR  

DOE Patents (OSTI)

An homogeneous nuclear power reactor utilizing convection circulation of the liquid fuel is proposed. The reactor has an internal heat exchanger looated in the same pressure vessel as the critical assembly, thereby eliminating necessity for handling the hot liquid fuel outside the reactor pressure vessel during normal operation. The liquid fuel used in this reactor eliminates the necessity for extensive radiolytic gas rocombination apparatus, and the reactor is resiliently pressurized and, without any movable mechanical apparatus, automatically regulates itself to the condition of criticality during moderate variations in temperature snd pressure and shuts itself down as the pressure exceeds a predetermined safe operating value.

Hammond, R.P.; King, L.D.P.

1960-03-22T23:59:59.000Z

85

Vertical Velocity and Buoyancy Characteristics of Coherent Echo Plumes in the Convective Boundary Layer, Detected by a Profiling Airborne Radar  

Science Conference Proceedings (OSTI)

Aircraft and airborne millimeter-wave radar observations are used to interpret the dynamics of radar echoes and radar-inferred updrafts within the well-developed, weakly sheared continental convective boundary layer. Vertically pointing radar ...

Qun Miao; Bart Geerts; Margaret LeMone

2006-06-01T23:59:59.000Z

86

Convective heater  

DOE Patents (OSTI)

A convective heater for heating fluids such as a coal slurry is constructed of a tube circuit arrangement which obtains an optimum temperature distribution to give a relatively constant slurry film temperature. The heater is constructed to divide the heating gas flow into two equal paths and the tube circuit for the slurry is arranged to provide a mixed flow configuration whereby the slurry passes through the two heating gas paths in successive co-current, counter-current and co-current flow relative to the heating gas flow. This arrangement permits the utilization of minimum surface area for a given maximum film temperature of the slurry consistent with the prevention of coke formation. 14 figs.

Thorogood, R.M.

1983-12-27T23:59:59.000Z

87

Convective heater  

DOE Patents (OSTI)

A convective heater for heating fluids such as a coal slurry is constructed of a tube circuit arrangement which obtains an optimum temperature distribution to give a relatively constant slurry film temperature. The heater is constructed to divide the heating gas flow into two equal paths and the tube circuit for the slurry is arranged to provide a mixed flow configuration whereby the slurry passes through the two heating gas paths in successive co-current, counter-current and co-current flow relative to the heating gas flow. This arrangement permits the utilization of minimum surface area for a given maximum film temperature of the slurry consistent with the prevention of coke formation.

Thorogood, Robert M. (Macungie, PA)

1986-01-01T23:59:59.000Z

88

Convective heater  

DOE Patents (OSTI)

A convective heater for heating fluids such as a coal slurry is constructed of a tube circuit arrangement which obtains an optimum temperature distribution to give a relatively constant slurry film temperature. The heater is constructed to divide the heating gas flow into two equal paths and the tube circuit for the slurry is arranged to provide a mixed flow configuration whereby the slurry passes through the two heating gas paths in successive co-current, counter-current and co-current flow relative to the heating gas flow. This arrangement permits the utilization of minimum surface area for a given maximum film temperature of the slurry consistent with the prevention of coke formation.

Thorogood, Robert M. (Macungie, PA)

1983-01-01T23:59:59.000Z

89

Cumulus Convection and CISK in Midlatitudes. Part II: Comma-Cloud Formation in Cyclonic Shear Regions  

Science Conference Proceedings (OSTI)

Observational studies show that polar air stream cyclones form preferentially to the north of the polar front in regions of high vorticity and low static stability, although the baroclinicity may be stronger elsewhere. This phenomenon is ...

George C. Craig; Han-Ru Cho

1992-08-01T23:59:59.000Z

90

Interpretation of Doppler Weather Radar Displays of Midlatitude Mesoscale Convective Systems  

Science Conference Proceedings (OSTI)

The utility of color displays of Doppler-radar data in revealing real-time kinematic information has been demonstrated in past studies, especially for extratropical cyclones and severe thunderstorms. Such displays can also indicate aspects of the ...

Robert A. Houze Jr.; M. I. Biggerstaff; S. A. Rutledge; B. F. Smull

1989-06-01T23:59:59.000Z

91

Numerical Modeling of a Midlatitude Squall Line: Features of the Convection and Vertical Momentum Flux  

Science Conference Proceedings (OSTI)

A 4-h simulation is carried out for the 22 May 1976 squall line that passed through the mesonetwork of the National Severe Storm Laboratory in central Oklahoma. This squall line was more than 100 km wide, oriented north-south and traveled ...

Frank B. Lipps; Richard S. Hemler

1991-09-01T23:59:59.000Z

92

Stability and charging characteristics of the comma head region of continental winter cyclones  

Science Conference Proceedings (OSTI)

This paper presents analyses of the fine-scale structure of convection in the comma head of two continental winter cyclones and a 16-storm climatology analyzing the distribution of lightning within the comma head. A case study of a deep cyclone is ...

Robert M. Rauber; Joseph Wegman; David M. Plummer; Andrew A. Rosenow; Melissa Peterson; Greg M. McFarquhar; Brian F. Jewett; David Leon; Patrick S. Market; Kevin R. Knupp; Jason M. Keeler; Steven M. Battaglia

93

Severe Convective Wind Environments  

Science Conference Proceedings (OSTI)

Nontornadic thunderstorm winds from long-lived, widespread convective windstorms can have a tremendous impact on human lives and property. To examine environments that support damaging wind producing convection, sounding parameters from Rapid ...

Evan L. Kuchera; Matthew D. Parker

2006-08-01T23:59:59.000Z

94

Simulation of Effects of Atmospheric Aerosols on Deep Turbulent Convective Clouds Using a Spectral Microphysics Mixed-Phase Cumulus Cloud Model. Part II: Sensitivity Study  

Science Conference Proceedings (OSTI)

Effects of different size distributions of cloud condensational nuclei (CCN) on the evolution of deep convective clouds under dry unstable continental thermodynamic conditions are investigated using the spectral microphysics Hebrew University ...

A. Khain; A. Pokrovsky

2004-12-01T23:59:59.000Z

95

The convective structures associated with cloud-to-ground lightning in TOGA COARE Mesoscale Convective Systems  

E-Print Network (OSTI)

The TOGA COARE experiment was carried out in the western Pacific warm pool region from November 1992 through February 1993. Data from TOGA COARE provide the opportunity for comprehensive studies of tropical oceanic convection. This study seeks to understand more about the structures of tropical mesoscale convective systems in relation to their lightning activity and cold cloud area. The properties of convective cores within the MCSs, as well as their infrared (IR) cloud top temperatures are related to cloud-to-ground lightning. IR and lightning time histories for each case are compared, and the cases ranked by mean flashes per 10000 km2. For selected cases, radar/lightning overlays and vertical profiles of maximum radar reflectivities (VPRRs) are shown in order to describe the convective structures of cells that produced lightning, and also cells that did not produce lightning. IR cloud-top temperature and lightning histories indicate the highly variable nature of the TOGA COARE MCSs. Some MCSs which have very cold cloud-top temperatures have little or no lightning. When a system did produce lightning, more flashes generally occurred during its growth phase. Overall, IR measurements seem to be a poor indicator of lightning due to the lack of a clear relationship between the size of cold cloud-top area and cloud-to-ground flashes. The overall flash rates of the TOGA COARE MCSs support previous work which showed that tropical oceanic convection has an order of magnitude less cloud-to-ground lightning than continental convection. In fact, the highest flash rate for the 13 cases was less than the weakest continental case in a Texas MCS study (Toracinta et al. 1995). Examination of individual VPRR and of all convective VPRR from the 13 cases indicate a pronounced difference between lightning producing and non-lightning producing cells. Lightning producing convective cells have higher radar reflectivity in the 5.0- 8.0 km layer, and a slower decrease with height, both observations indicating larger ice particles in the mixed phase region between 00 C and-200 C.

Restivo, Michael Edward

1995-01-01T23:59:59.000Z

96

Estimation of Continental Precipitation Recycling  

Science Conference Proceedings (OSTI)

The total amount of water that precipitates on large continental regions is supplied by two mechanisms: 1) advection from the surrounding areas external to the region and 2) evaporation and transpiration from the land surface within the region. ...

Kaye L. Brubaker; Dara Entekhabi; P. S. Eagleson

1993-06-01T23:59:59.000Z

97

A Climatology of Midlatitude Continental Clouds from the ARM SGP Central Facility. Part II: Cloud Fraction and Surface Radiative Forcing  

Science Conference Proceedings (OSTI)

Data collected at the Department of Energy Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP) Central Facility (SCF) are analyzed to determine the monthly and hourly variations of cloud fraction and radiative forcing between ...

Xiquan Dong; Baike Xi; Patrick Minnis

2006-05-01T23:59:59.000Z

98

The Impacts of Climate Change on Autumn North Atlantic Midlatitude Cyclones  

Science Conference Proceedings (OSTI)

This study explores how midlatitude extratropical cyclone intensities, frequencies, and tracks can be modified under warming-induced conditions due to enhanced greenhouse gas (GHG) concentrations. Simulations were performed with the Canadian ...

Jing Jiang; William Perrie

2007-04-01T23:59:59.000Z

99

The Static Stability of the Midlatitude Troposphere: The Relevance of Moisture  

Science Conference Proceedings (OSTI)

It is generally accepted that the action of baroclinic waves in midlatitude is responsible for raising the static stability of the troposphere above moist neutrality. Previous efforts to quantify this process have concentrated on the stability ...

M. N. Juckes

2000-09-01T23:59:59.000Z

100

A Linear Stochastic Model of a GCM’s Midlatitude Storm Tracks  

Science Conference Proceedings (OSTI)

A linear stochastic model is used to simulate the midlatitude storm tracks produced by an atmospheric GCM. A series of six perpetual insolation/SST GCM experiments are first performed for each month. These experiments capture the “midwinter ...

Yunqing Zhang; Isaac M. Held

1999-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "midlatitude continental convective" 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

Midlatitude Eddies, Storm-Track Diffusivity, and Poleward Moisture Transport in Warm Climates  

Science Conference Proceedings (OSTI)

Recent work using both simplified and comprehensive GCMs has shown that poleward moisture transport across midlatitudes follows Clausius–Clapeyron scaling at temperatures close to modern, but that it reaches a maximum at sufficiently elevated ...

Rodrigo Caballero; John Hanley

2012-11-01T23:59:59.000Z

102

A Theory for Midlatitude Forcing of Tropical Motions during Winter Monsoons  

Science Conference Proceedings (OSTI)

In order to understand the northeasterly monsoon surges and associated tropical motions over Southeast Asia during northern winter, the dynamic response of the tropical atmosphere to midlatitude pressure surges is studied using the linearized ...

Hock Lim; C-P. Chang

1981-11-01T23:59:59.000Z

103

Atmospheric Response to Zonal Variations in Midlatitude SST: Transient and Stationary Eddies and Their Feedback  

Science Conference Proceedings (OSTI)

Midwinter storm track response to zonal variations in midlatitude sea surface temperatures (SSTs) has been investigated using an atmospheric general circulation model under aquaplanet and perpetual-January conditions. Zonal wavenumber-1 SST ...

Masaru Inatsu; Hitoshi Mukougawa; Shang-Ping Xie

2003-10-01T23:59:59.000Z

104

Midlatitude Baroclinic Rossby Waves in a High-Resolution OGCM Simulation  

Science Conference Proceedings (OSTI)

The effects of background baroclinic zonal flow and bottom pressure decoupling on midlatitude oceanic Rossby wave dynamics using a high-resolution OGCM simulation are investigated. To examine these effects, the phase speed and vertical structure ...

Kunihiro Aoki; Atsushi Kubokawa; Hideharu Sasaki; Yoshikazu Sasai

2009-09-01T23:59:59.000Z

105

The Heat Budget of a Midlatitude Squall Line and Implications for Potential Vorticity Production  

Science Conference Proceedings (OSTI)

The water and heat budgets for a midlatitude squall line are estimated from single- and dual-Doppler-radar data and thermodynamic data from rawinsonde and thermodynamic retrieval (from dual-Doppler winds). These data, along with models to ...

Scott A. Braun; Robert A. Houze Jr.

1996-05-01T23:59:59.000Z

106

The Role of Forcing in Cell Morphology and Evolution within Midlatitude Squall Lines  

Science Conference Proceedings (OSTI)

This study assesses the role of mesoscale forcing on cell morphology and early evolution of midlatitude squall lines. The forcing chosen was a cold front, simulated to frontal collapse to produce a specific set of thermodynamic profiles at the ...

Brian F. Jewett; Robert B. Wilhelmson

2006-12-01T23:59:59.000Z

107

A Diagnosis of Two Blocking Events That Occurred Simultaneously in the Midlatitude Northern Hemisphere  

Science Conference Proceedings (OSTI)

Using the Goddard Laboratory for Atmospheres Goddard Earth Observing System-1 analyses, the horizontal distribution of atmospheric forcing processes involved in the growth, maintenance, and decay of two Northern Hemisphere midlatitude blocking ...

Anthony R. Lupo

1997-08-01T23:59:59.000Z

108

Internal Feedbacks from Monsoon–Midlatitude Interactions during Droughts in the Indian Summer Monsoon  

Science Conference Proceedings (OSTI)

Results from a 20-yr simulation of a high-resolution AGCM forced with climatological SST, along with simplified model experiments and supplementary data diagnostics, are used to investigate internal feedbacks arising from monsoon–midlatitude ...

R. Krishnan; Vinay Kumar; M. Sugi; J. Yoshimura

2009-03-01T23:59:59.000Z

109

Dynamical Origin of Low-Frequency Variability in a Highly Nonlinear Midlatitude Coupled Model  

Science Conference Proceedings (OSTI)

A novel mechanism of decadal midlatitude coupled variability, which crucially depends on the nonlinear dynamics of both the atmosphere and the ocean, is presented. The coupled model studied involves quasigeostrophic atmospheric and oceanic ...

S. Kravtsov; P. Berloff; W. K. Dewar; M. Ghil; J. C. McWilliams

2006-12-01T23:59:59.000Z

110

A climatology of the structure, evolution and propagation of midlatitude cyclones in the Southeast United States  

Science Conference Proceedings (OSTI)

The seasonal and interannual variability of the structure, evolution, and propagation of midlatitude cyclones in the southeastern United States are studied using a composite analysis. Composites show that the axis of the wintertime upper-level ...

Rosana Nieto Ferreira; Linwood Hall; Thomas M. Rickenbach

111

Toward a Midlatitude Ocean Frequency–Wavenumber Spectral Density and Trend Determination  

Science Conference Proceedings (OSTI)

The time- and space-scale descriptive power of two-dimensional Fourier analysis is exploited to reanalyze the behavior of midlatitude variability as seen in altimetric data. These data are used to construct a purely empirical and analytical ...

Carl Wunsch

2010-10-01T23:59:59.000Z

112

Summertime Incursions of Midlatitude Air into Subtropical and Tropical South America  

Science Conference Proceedings (OSTI)

Transient incursions of midlatitude air to the east of the Andes Mountains into subtropical and tropical latitudes are a distinctive feature of the synoptic climatology over South America. The mean synoptic-scale structure of these incursions is ...

RenéD. Garreaud; John M. Wallace

1998-10-01T23:59:59.000Z

113

On the Midlatitude Circulation in a High-Resolution Model of the North Atlantic  

Science Conference Proceedings (OSTI)

This paper describes, and establishes the dynamical mechanisms responsible for, the large-scale, time-mean, midlatitude circulation in a high-resolution model of the North Atlantic basin. The model solution is compared with recently proposed ...

Frank O. Bryan; Claus W. Böning; William R. Holland

1995-03-01T23:59:59.000Z

114

The Impact of the Ice Phase and Radiation on a Midlatitude Squall Line System  

Science Conference Proceedings (OSTI)

A two-dimensional cloud model is used to study the interrelationships among cloud microphysics, radiation, and dynamics in a midlatitude broken-line squall system. The impact of the ice phase, longwave and shortwave radiation on the dynamic and ...

Hung-Neng S. Chin

1994-11-01T23:59:59.000Z

115

The Vertical Profile of Liquid and Ice Water Content in Midlatitude Mixed-Phase Altocumulus Clouds  

Science Conference Proceedings (OSTI)

The microphysical properties of mixed-phase altocumulus clouds are investigated using in situ airborne measurements acquired during the ninth Cloud Layer Experiment (CLEX-9) over a midlatitude location. Approximately ? of the sampled profiles are ...

Lawrence D. Carey; Jianguo Niu; Ping Yang; J. Adam Kankiewicz; Vincent E. Larson; Thomas H. Vonder Haar

2008-09-01T23:59:59.000Z

116

A Comparison of Tropical and Midlatitude Thunderstorm Evolution in Response to Wind Shear  

Science Conference Proceedings (OSTI)

The influence of vertical wind shear on storm development within a tropical environment is studied with the aid of two numerical models and compared with that in simulations of midlatitude storms. The simulations show that larger wind shears are ...

Ulrike Wissmeier; Robert Goler

2009-08-01T23:59:59.000Z

117

Coupled Ocean–Atmosphere Dynamics in a Simple Midlatitude Climate Model  

Science Conference Proceedings (OSTI)

Midlatitude air–sea interactions are investigated by coupling a stochastically forced two-layer quasigeostrophic channel atmosphere to a simple ocean model. The stochastic forcing has a large-scale standing pattern to simulate the main modes of ...

David Ferreira; Claude Frankignoul; John Marshall

2001-09-01T23:59:59.000Z

118

Energy of Midlatitude Transient Eddies in Idealized Simulations of Changed Climates  

Science Conference Proceedings (OSTI)

As the climate changes, changes in static stability, meridional temperature gradients, and availability of moisture for latent heat release may exert competing effects on the energy of midlatitude transient eddies. This paper examines how the ...

Paul A. O’Gorman; Tapio Schneider

2008-11-01T23:59:59.000Z

119

Mid-Latitude Mesoscale Temperature Variability in Six Multiship XBT Surveys  

Science Conference Proceedings (OSTI)

We discuss the spatial character of mesoscale temperature variability as observed in six midlatitude multiship expendable bathythermograph (XBT) surveys, two from the North Pacific and four from the North Atlantic. These surveys sample mid-ocean ...

D. E. Harrison; W. J. Emergy; J. P. Dugan; Bo-Cheng Li

1983-04-01T23:59:59.000Z

120

Low-Frequency Variability in the Midlatitude Baroclinic Atmosphere Induced by an Oceanic Thermal Front  

Science Conference Proceedings (OSTI)

This study examines the flow induced by an east–west-oriented oceanic thermal front in a highly idealized baroclinic model. Previous work showed that thermal fronts could produce energetic midlatitude jets in an equivalent-barotropic atmosphere ...

Yizhak Feliks; Michael Ghil; Eric Simonnet

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "midlatitude continental convective" 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

An Operational Ingredients-Based Methodology for Forecasting Midlatitude Winter Season Precipitation  

Science Conference Proceedings (OSTI)

An ingredients-based methodology (IM) for the operational analysis and prediction of midlatitude winter season precipitation is developed. Diagnostics for five fundamental physical ingredients involved in the production of precipitation—forcing ...

Suzanne W. Wetzel; Jonathan E. Martin

2001-02-01T23:59:59.000Z

122

Near-Tropopause Vertical Motion within the Trailing Stratiform Region of a Midlatitude Squall Line  

Science Conference Proceedings (OSTI)

Rawinsonde observations have been used to determine the flow structure in the vicinity of the tropopause atop the trailing stratiform precipitation region of an intense midlatitude squall line. Computations of vertical motion using the kinematic ...

Richard H. Johnson; William A. Gallus Jr.; Michael D. Vescio

1990-09-01T23:59:59.000Z

123

Autumn Precipitation Trends over Southern Hemisphere Midlatitudes as Simulated by CMIP5 Models  

Science Conference Proceedings (OSTI)

In recent decades, Southern Hemisphere midlatitude regions such as southern Africa, southeastern Australia, and southern Chile have experienced a reduction in austral autumn precipitation; the cause of which is poorly understood. This study ...

Ariaan Purich; Tim Cowan; Seung-Ki Min; Wenju Cai

2013-11-01T23:59:59.000Z

124

The Statistics and Structure of Subseasonal Midlatitude Variability in NASA GSFC GCMs  

Science Conference Proceedings (OSTI)

A comprehensive analysis of midlatitude intraseasonal variability in extended integrations of NASA GSFC general circulation models (GCMs) is conducted. This is approached by performing detailed intercomparisons of the representation of the storm ...

Dennis P. Robinson; Robert X. Black

2005-08-01T23:59:59.000Z

125

The Position of the Midlatitude Storm Track and Eddy-Driven Westerlies in Aquaplanet AGCMs  

Science Conference Proceedings (OSTI)

The sensitivity of the midlatitude storm track and eddy-driven wind to the sea surface temperature (SST) boundary forcing is studied over a wide range of perturbations using both simple and comprehensive general circulation models over aquaplanet ...

Jian Lu; Gang Chen; Dargan M. W. Frierson

2010-12-01T23:59:59.000Z

126

Interannual Variations of Total Ozone at Northern Midlatitudes Correlated with Stratospheric EP Flux and Potential Vorticity  

Science Conference Proceedings (OSTI)

At northern midlatitudes over the 1979–2002 time period, column ozone trends are observed to have maximum negative amplitudes in February and March. Here, the portion of the observed ozone interannual variability and trends during these months ...

L. L. Hood; B. E. Soukharev

2005-10-01T23:59:59.000Z

127

Boundary layer convergence induced by strong winds across a midlatitude SST front  

Science Conference Proceedings (OSTI)

Recent studies indicate that midlatitude SST fronts’ influence extends through the marine atmospheric boundary layer (MABL) into the free atmosphere, with implications for climate variability. To better understand the mechanisms of this ocean-to-...

Thomas Kilpatrick; Niklas Schneider; Bo Qiu

128

The Basic Effects of Atmosphere–Ocean Thermal Coupling on Midlatitude Variability  

Science Conference Proceedings (OSTI)

Starting from the assumption that the atmosphere is the primary source of variability internal to the midlatitude atmosphere–ocean system on intraseasonal to interannual timescales, the authors construct a simple stochastically forced, one-...

Joseph J. Barsugli; David S. Battisti

1998-02-01T23:59:59.000Z

129

Autumn precipitation trends over Southern Hemisphere midlatitudes as simulated by CMIP5 models  

Science Conference Proceedings (OSTI)

In recent decades, Southern Hemisphere midlatitude regions such as southern Africa, southeastern Australia and southern Chile have experienced a reduction in austral autumn precipitation; the cause of which is poorly understood. This study focuses ...

Ariaan Purich; Tim Cowan; Seung-Ki Min; Wenju Cai

130

Restratification after Deep Convection  

Science Conference Proceedings (OSTI)

An important, yet poorly understood, aspect of the water mass transformation process in the ocean is the manner in which the convected fluid, once formed, is accommodated and drawn into the general circulation. Following “violent mixing” in the ...

Helen Jones; John Marshall

1997-10-01T23:59:59.000Z

131

Deep Convective Rotational Solitary Waves and Mesoscale Convective Complexes  

Science Conference Proceedings (OSTI)

As an extension of CCI (conditional convective instability) theory, three-dimensional, deep and steady convective waves in a barotropic basic flow with an embedded moist zone were studied via perturbation methods. The basic state is assumed to be ...

Qin Xu

1987-06-01T23:59:59.000Z

132

The Convective Storm Initiation Project  

Science Conference Proceedings (OSTI)

The Convective Storm Initiation Project (CSIP) is an international project to understand precisely where, when, and how convective clouds form and develop into showers in the mainly maritime environment of southern England. A major aim of CSIP is ...

Keith A. Browning; Cyril J. Morcrette; John Nicol; Alan M. Blyth; Lindsay J. Bennett; Barbara J. Brooks; John Marsham; Stephan D. Mobbs; Douglas J. Parker; Felicity Perry; Peter A. Clark; Sue P. Ballard; Mark A. Dixon; Richard M. Forbes; Humphrey W. Lean; Zhihong Li; Nigel M. Roberts; Ulrich Corsmeier; Christian Barthlott; Bernhard Deny; Norbert Kalthoff; Samiro Khodayar; Martin Kohler; Christoph Kottmeier; Stephan Kraut; Michael Kunz; Jürgen Lenfant; Andreas Wieser; Judith L. Agnew; Dave Bamber; James McGregor; Karl M. Beswick; Malcolm D. Gray; Emily Norton; Hugo M. A. Ricketts; Andrew Russell; Geraint Vaughan; Ann R. Webb; Mark Bitter; Thomas Feuerle; Rolf Hankers; Helmut Schulz; Karen E. Bozier; Chris G. Collier; Fay Davies; Catherine Gaffard; Tim J. Hewison; Darcy N. Ladd; Elizabeth C. Slack; Joe Waight; Markus Ramatschi; David P. Wareing; Robert J. Watson

2007-12-01T23:59:59.000Z

133

Convection Patterns in a Pond  

Science Conference Proceedings (OSTI)

Unusual convection patterns were observed in snow-slush an a pond in Seattle, Wash., during January 1980 and again during February 1981. The patterns are reminiscent of spoke-type convection discovered experimentally by Busse and Whitehead (1974)...

Kristina B. Katsaros

1981-10-01T23:59:59.000Z

134

NATURAL CONVECTION IN ROOM GEOMETRIES  

E-Print Network (OSTI)

that convective heat transfer processes are These computer~vective .part of the heat transfer process ? elng studled*of convect i ve heat transfer processes, the behavior of a

Gadgil, A.

2008-01-01T23:59:59.000Z

135

Quantifying transport between the tropical and mid-latitude lower stratosphere  

Science Conference Proceedings (OSTI)

Airborne in situ observations of molecules with a wide range of lifetimes (methane, nitrous oxide, reactive nitrogen, ozone, chlorinated halocarbons, and halon-1211), used in a tropical tracer model, show that mid-latitude air is entrained into the tropical lower stratosphere within about 13.5 months; transport is faster in the reverse direction. Because exchange with the tropics is slower than global photochemical models generally assume, ozone at mid-latitudes appears to be more sensitive to elevated levels of industrial chlorine than is currently predicted. Nevertheless, about 45 percent of air in the tropical ascent region at 21 kilometers is of mid-latitude origin, implying that emissions from supersonic aircraft could reach the middle stratosphere. 49 refs., 5 figs.

Volk, C.M.; Dutton, G.S.; Gilligan, J.M. [National Oceanic and Atmospheric Administration, Boulder, CO (United States)] [and others

1996-06-21T23:59:59.000Z

136

NATURAL CONVECTION IN PASSIVE SOLAR BUILDINGS: EXPERIMENTS, ANALYSIS AND RESULTS  

E-Print Network (OSTI)

convection process and calculate convective heat transferthat convective heat transfer processes are highly dependentheat transfer process being studied* and

Gadgil, Ashok; Bauman, Fred; Kammerud, Ronald

2008-01-01T23:59:59.000Z

137

Observational Constraints on the Cloud Thermodynamic Phase in Midlatitude Storms CATHERINE M. NAUD  

E-Print Network (OSTI)

in the ice versus the liquid phase. Early prognostic cloud water parameterizations for stratiform clouds supercooled liquid water gradually gives way to ice in the mixed-phase regions of clouds are still poorlyObservational Constraints on the Cloud Thermodynamic Phase in Midlatitude Storms CATHERINE M. NAUD

138

EIS-0045: Coal Conversion Program, Continental Forest Industries...  

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

45: Coal Conversion Program, Continental Forest Industries, Combustors 1,2, and 3, Port Wentworth, Chatham County, Georgia EIS-0045: Coal Conversion Program, Continental Forest...

139

Convective Modifications of a Geostrophic Eddy Field  

Science Conference Proceedings (OSTI)

Ocean convection often occurs in regions of mesoscale eddy activity, where convective mixing and geostrophic eddy dynamics interact. The authors examine the interactions between a group of geostrophic eddies and convective mixing induced by ...

Sonya Legg; James C. McWilliams

2001-04-01T23:59:59.000Z

140

Tropical Convective Variability as 1/f Noise  

Science Conference Proceedings (OSTI)

Evidence is presented that the tropical convective variability behaves as 1/f noise for a 1–30-day period. This behavior is shown by analyzing the time series of convective available potential energy, which measures the degree of convective ...

Jun-Ichi Yano; Klaus Fraedrich; Richard Blender

2001-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "midlatitude continental convective" 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

Improving Convective Parameterization Using ARM Data  

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

Convective Parameterization Using ARM Data G. J. Zhang Center for Atmospheric Sciences Scripps Institution of Oceanography La Jolla, California Introduction Convective...

142

Radiative Transfer Simulations Using Mesoscale Cloud Model Outputs: Comparisons with Passive Microwave and Infrared Satellite Observations for Midlatitudes  

Science Conference Proceedings (OSTI)

Real midlatitude meteorological cases are simulated over western Europe with the cloud mesoscale model Méso-NH, and the outputs are used to calculate brightness temperatures at microwave frequencies with the Atmospheric Transmission at Microwave (...

Ingo Meirold-Mautner; Catherine Prigent; Eric Defer; Juan R. Pardo; Jean-Pierre Chaboureau; Jean-Pierre Pinty; Mario Mech; Susanne Crewell

2007-05-01T23:59:59.000Z

143

Extratropical Transition of Tropical Cyclones over the Western North Pacific. Part II: The Impact of Midlatitude Circulation Characteristics  

Science Conference Proceedings (OSTI)

Two characteristic midlatitude circulation patterns (labeled northwest and northeast) are found to be associated with extratropical transition (ET) of tropical cyclones over the western North Pacific Ocean. Although in both cases the tropical ...

Patrick A. Harr; Russell L. Elsberry; Timothy F. Hogan

2000-08-01T23:59:59.000Z

144

Effects of Serial Dependence and Large-Scale Tropospheric Circulation on Midlatitude North American Terrestrial Carbon Dioxide Exchange  

Science Conference Proceedings (OSTI)

Linear regression was used to relate modes of tropospheric circulation variability to estimates of gross ecosystem production (GEP) and ecosystem respiration (ER) measured at 14 midlatitude North American eddy covariance (EC) towers. The North ...

Robbie A. Hember; Peter M. Lafleur

2008-02-01T23:59:59.000Z

145

Response of the Midlatitude Jets, and of Their Variability, to Increased Greenhouse Gases in the CMIP5 Models  

Science Conference Proceedings (OSTI)

This work documents how the midlatitude, eddy-driven jets respond to climate change using model output from phase 5 of the Coupled Model Intercomparison Project (CMIP5). The authors consider separately the North Atlantic, the North Pacific, and ...

Elizabeth A. Barnes; Lorenzo Polvani

2013-09-01T23:59:59.000Z

146

A Numerical Study on the Atmospheric Circulation over the Midlatitude North Pacific during the Last Glacial Maximum  

Science Conference Proceedings (OSTI)

The dynamics of the atmospheric circulation change over the midlatitude North Pacific under the boundary conditions during the last glacial maximum (LGM) have been studied by atmospheric general circulation models (GCMs) with different ocean ...

Wataru Yanase; Ayako Abe-Ouchi

2010-01-01T23:59:59.000Z

147

The Relationship of Surface Pressure Features to the Precipitation and Airflow Structure of an Intense Midlatitude Squall Line  

Science Conference Proceedings (OSTI)

Observations from the Oklahoma–Kansas Preliminary Regional Experiment for STORM-Central (OK PRE-STORM) have been used to document the surface pressure features accompanying an intense midlatitude squall line with trailing stratiform ...

Richard H. Johnson; Paul J. Hamilton

1988-07-01T23:59:59.000Z

148

Estimates of Time and Space Scales at 300 Meters in the Midlatitude North Pacific from the TRANSPAC XBT Program  

Science Conference Proceedings (OSTI)

Estimates of length and time scales of temperature variability at 300 meters in the midlatitude North Pacific are made. Data are XBT traces collected from 1976 to 1984 in the TRANSPAC Volunteer Observing Ship program. Temperatures at 300 meters ...

Lynne D. Talley; Warren B. White

1987-12-01T23:59:59.000Z

149

Vertical Velocities in Continental Boundary Layer Stratocumulus...  

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

- Persist of long time-scales * Impact on radiation budget - High SW albedo compared to land or ocean Klein and Hartmann 1993 But Why Continental Clouds? * They do exist -...

150

Mesoscale Evolution of a Continental Occluded Cyclone  

Science Conference Proceedings (OSTI)

A diagnostic study of a continental occluding extratropical cyclone (ETC) during 1–2 November 1992 is presented using initializations from the Mesoscale Atmospheric Prediction System (MAPS), a hybrid sigma–isentropic coordinate model. Whereas ...

Patrick S. Market; James T. Moore

1998-07-01T23:59:59.000Z

151

Continental Slope Flow Northeast of Taiwan  

Science Conference Proceedings (OSTI)

Hydrographic observations and current measurements with a Shipboard Acoustic Doppler Current Profiler over the continental shelf–slope junction northeast of Taiwan during 10–17 August 1994 allow the construction of the mesoscale flow pattern ...

T. Y. Tang; Y. Hsueh; Y. J. Yang; J. C. Ma

1999-06-01T23:59:59.000Z

152

Drought Reconstructions for the Continental United States  

Science Conference Proceedings (OSTI)

The development of a 2° lat × 3° long grid of summer drought reconstructions for the continental United States estimated from a dense network of annual tree-ring chronologies is described. The drought metric used is the Palmer Drought Severity ...

Edward R. Cook; David M. Meko; David W. Stahle; Malcolm K. Cleaveland

1999-04-01T23:59:59.000Z

153

An analysis on the mid-latitude scintillation and coherence frequency bandwidth using transionospheric VHF signals  

Science Conference Proceedings (OSTI)

An analysis was perfonned on the mid-latitude scintillation and coherence frequency bandwidth (Fcoh) using transionospheric VHF signal data. The data include 1062 events spanning from November 1997 to June 2002. Each event records FORTE satellite received VHF signals from LAPP located at Los Alamos, New Mexico. Fcohs were derived to study scintillation characteristics on diurnal and seasonal variations, as well as changes due to solar and geomagnetic activities. Comparisons to the VHFIUHF coherence frequency bandwidth studies previously reported at equatorial and mid-latitude regions are made using a 4th power frequency dependence relationship. Furthennore, a wideband ionospheric scintillation model, WBMOD, was used to estimate Fcohs and compared with our VHF Fcoh values. Our analysis indicates mid-latitude scintillation characteristics that are not previously revealed. At the VHF bottom frequency range (3035 MHz), distinguished smaller Fcohs are found in time period from sunset to midnight, in wann season from May to August, and in low solar activity years. The effects of geomagnetic storm activity on Fcoh are characterized by a sudden transition at a Kp index of 50-60. Comparisons with median Fcohs estimated from other studies validated our VHF Fcohs for daytime while an order of magnitude larger Fcohs are found for nighttime, implying a time-dependent issue in applying the 4th order power relationship. Furthermore, comparisons with WBMOD-estimated Fcohs indicated generally matched median scintillation level estimates while differences do exist for those events undergoing high geomagnetic stonn activity which may imply underestimates of scintillation level by the WBMOD in the mid-latitude regions.

Juang, Zhen [Los Alamos National Laboratory; Roussel-dupre, Robert [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

154

Liquid convective diodes  

DOE Green Energy (OSTI)

Liquid convective diodes are analyzed by experiments and theory. The experiments include flow visualization and temperature measurements. The dynamic behavior of a diode is analyzed and explained. Performance of three diodes of different designs that were installed in a test cell this past winter showed an average 50% thermal efficiency over a three-month period. If only the performance of the most efficient diode among the three is considered, it is expected that this figure may be increased to 60% or possibly 65% with some design improvements. A simple analytical model, which was developed earlier, is discussed. A comparison of reservoir temperatures from one of the test cell diodes with predicted temperatures from the model showed excellent agreement. The good agreement indicates that the model contains the elements that are necessary to accurately predict site-specific diode performance.

Jones, G.F.

1984-01-01T23:59:59.000Z

155

A Numerical Simulation of Convectively Induced Turbulence above Deep Convection  

Science Conference Proceedings (OSTI)

At 1034 UTC 2 September 2007, a commercial aircraft flying from Jeju, South Korea, to Osaka, Japan, at an altitude of approximately 11.2 km encountered severe turbulence above deep convection. To investigate the characteristics and generation ...

Jung-Hoon Kim; Hye-Yeong Chun

2012-06-01T23:59:59.000Z

156

Convection in pulsating stars. II. RR Lyrae convection and stability  

Science Conference Proceedings (OSTI)

Convective model envelopes of two RR Lyrae stars are constructed, one centrally located in the instability strip, and one just beyond the red edge of the stip. Steady state solutions and small amplitude oscillations are studied using a nonlinear pulsation code. We find that convection has only a small effect on the stability of the hotter model, primarily due to turbulent pressure work (net driving) in the hydrogen ionization zone. The cooler model, however, shows strong reduction in both hydrogen and helium ionization driving, which quenches the pulsation. This effect is not directly attributable to convective PdV work, but probably reflects changes in structure and phase relations in the envelope due to convection.

Stellingwerf, R.F.

1982-11-01T23:59:59.000Z

157

Idealized Mesoscale Convective System Structure and Propagation Using Convective Parameterization  

Science Conference Proceedings (OSTI)

The development and propagation of mesoscale convective systems (MCSs) was examined within the Weather Research and Forecasting (WRF) model using the Kain–Fritsch (KF) cumulus parameterization scheme and a modified version of this scheme. ...

James Correia Jr.; Raymond W. Arritt; Christopher J. Anderson

2008-07-01T23:59:59.000Z

158

Heat distribution by natural convection  

DOE Green Energy (OSTI)

Natural convection between spaces in a building can play a major role in energy transfer. Two situations are investigated: convection through a single doorway into a remote room, and a convective loop in a two-story house with a south sunspace where a north stairway serves as the return path. A doorway-sizing equation is given for the single-door case. Detailed data are given from the monitoring of airflow in one two-story house and summary data are given for five others. Observations on the nature of the airflow and design guidelines are presented.

Balcomb, J.D.; Yamaguchi, K.

1983-01-01T23:59:59.000Z

159

The Transition to Strong Convection  

Science Conference Proceedings (OSTI)

Recent work has shown that observations of tropical precipitation conform to properties associated with critical phenomena in other systems. Here some of these universal properties are used to probe the physics of tropical convection empirically, ...

J. David Neelin; Ole Peters; Katrina Hales

2009-08-01T23:59:59.000Z

160

Mesoscale Convective Complexes in Africa  

Science Conference Proceedings (OSTI)

Digitized full-disk infrared satellite imagery from the European geostationary satellite (Meteosat) for 1986 and 1987 was used to construct a climatology of mesoscale convective complexes (MCCs) in Africa One hundred ninety-five systems formed ...

Arlene G. Laing; J. Michael Fritsch

1993-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "midlatitude continental convective" 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

Isentropic Analysis of Convective Motions  

Science Conference Proceedings (OSTI)

This paper analyzes the convective mass transport by sorting air parcels in terms of their equivalent potential temperature to determine an isentropic streamfunction. By averaging the vertical mass flux at a constant value of the equivalent ...

Olivier M. Pauluis; Agnieszka A. Mrowiec

2013-11-01T23:59:59.000Z

162

Integral Effects of Deep Convection  

Science Conference Proceedings (OSTI)

The large-scale, integral effect of convective elements (plumes) constituting an open-ocean chimney is investigated both theoretically and with a plume-resolving numerical model. The authors consider an initially homogeneous “patch” of ocean of ...

Uwe Send; John Marshall

1995-05-01T23:59:59.000Z

163

The Decay of Convective Turbulence  

Science Conference Proceedings (OSTI)

Using simulations with a large-eddy model we have studied the decay of convective turbulence in the atmospheric boundary layer when the upward surface sensible heat flux is suddenly stopped. The decay of turbulent kinetic energy and temperature ...

F. T. M. Nieuwstadt; R. A. Brost

1986-03-01T23:59:59.000Z

164

The basins on the Argentine continental margin  

Science Conference Proceedings (OSTI)

After the stabilization of the central Gondwana Craton, orogenic belts were accreted, as a result of convergence events and an extensive passive margin developed in southwestern Gondwana. Thermal subsidence in Parana, Karoo-Ventania basins and the Late Paleozoic-Early Mesozoic rifts, were modified by the Gondwana breakup and the South Atlantic opening. Early Paleozoic marine transgressions deposited the Table Mountain Group in Ventania. In southwestern Patagonia foreland clastics were deposited. Magmatic arcs and marine units indicate a tectonic trough was formed, alternating with continental sequences, over Late Paleozoic metamorphics and intrusives, resulting from plastered terrains along the Gondwana margin. In Patagonia, Permo-Carboniferous continental and glacio marine clastics infill the basins, while in Ventania, paralic sequences, grade from neritic to continental to the northeast, extending beneath the continental margin. The Triassic-Jurassic rift basins progressed onto regional widespread acid lavas and were infilled by lagoonal organic-rich sequences. Early drift phase built basins transverse to the margin, with fluvio-lacustrine sequences: Salado, Colorado, Valdes-Rawson, San Julian and North Malvinas intracratonic basins, which underwent transtensional faulting. Post-Oxfordian to Neocomian brackish sequences, onlapped the conjugate basins during the margin`s drift, with petroleum systems, as in Austral and Malvinas. In the Valanginian, basic extrusions commenced to form on the continental border, heralding the oceanic phase. Due to thermal subsidence, offlaping sediments prograded onto the remaining half-grabens. Several petroleum systems, proven and hypothetical, are identified in this region.

Urien, C.M. [Buenos Aires Technological Institute Petroleum School, Buenos Aires (Argentina)

1996-08-01T23:59:59.000Z

165

A Probabilistic Bulk Model of Coupled Mixed Layer and Convection. Part II: Shallow Convection Case  

Science Conference Proceedings (OSTI)

The probabilistic bulk convection model (PBCM) developed in a companion paper is here extended to shallow nonprecipitating convection. The PBCM unifies the clear-sky and shallow convection boundary layer regimes by obtaining mixed-layer growth, ...

Pierre Gentine; Alan K. Betts; Benjamin R. Lintner; Kirsten L. Findell; Chiel C. van Heerwaarden; Fabio D’Andrea

2013-06-01T23:59:59.000Z

166

The Impacts of Convective Parameterization and Moisture Triggering on AGCM-Simulated Convectively Coupled Equatorial Waves  

Science Conference Proceedings (OSTI)

This study examines the impacts of convective parameterization and moisture convective trigger on convectively coupled equatorial waves simulated by the Seoul National University (SNU) atmospheric general circulation model (AGCM). Three different ...

Jia-Lin Lin; Myong-In Lee; Daehyun Kim; In-Sik Kang; Dargan M. W. Frierson

2008-03-01T23:59:59.000Z

167

Continental Biofuels Corporation | Open Energy Information  

Open Energy Info (EERE)

Continental Biofuels Corporation Continental Biofuels Corporation Jump to: navigation, search Name Continental Biofuels Corporation Place Dallas, Texas Zip 75240 Sector Biofuels Product Dallas-based company devoted to agribusiness in Southeast Asia. The firms focus its agribusiness acquisitions on crops, especially palm oil plantations, that can be used as biofuels. Coordinates 32.778155°, -96.795404° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":32.778155,"lon":-96.795404,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

168

Convective heat flow probe  

DOE Patents (OSTI)

A convective heat flow probe device is provided which measures heat flow and fluid flow magnitude in the formation surrounding a borehole. The probe comprises an elongate housing adapted to be lowered down into the borehole; a plurality of heaters extending along the probe for heating the formation surrounding the borehole; a plurality of temperature sensors arranged around the periphery of the probe for measuring the temperature of the surrounding formation after heating thereof by the heater elements. The temperature sensors and heater elements are mounted in a plurality of separate heater pads which are supported by the housing and which are adapted to be radially expanded into firm engagement with the walls of the borehole. The heat supplied by the heater elements and the temperatures measured by the temperature sensors are monitored and used in providing the desired measurements. The outer peripheral surfaces of the heater pads are configured as segments of a cylinder and form a full cylinder when taken together. A plurality of temperature sensors are located on each pad so as to extend along the length and across the width thereof, with a heating element being located in each pad beneath the temperature sensors. An expansion mechanism driven by a clamping motor provides expansion and retraction of the heater pads and expandable packet-type seals are provided along the probe above and below the heater pads.

Dunn, J.C.; Hardee, H.C.; Striker, R.P.

1984-01-09T23:59:59.000Z

169

Neural network-based sensitivity analysis of summertime convection over the continental US  

Science Conference Proceedings (OSTI)

Although land-atmosphere coupling is thought to play a role in shaping the mean climate and its variability, it remains difficult to quantify precisely. The present study aims to isolate relationships between early morning surface turbulent fluxes ...

Filipe Aires; Pierre Gentine; Kirsten L. Findell; Benjamin R. Lintner; Christopher Kerr

170

ARM - Data Announcements Article  

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

New Evaluation Product Provides Thermodynamic Variables from Multiple New Evaluation Product Provides Thermodynamic Variables from Multiple Instruments Bookmark and Share INTERPSONDE output from the SGP Central Facility during the Midlatitude Continental Convective Clouds Experiment from April 26, 2011. INTERPSONDE output from the SGP Central Facility during the Midlatitude Continental Convective Clouds Experiment from April 26, 2011. The Interpolated Sonde (INTERPSONDE) value-added product (VAP) is an intermediate step of the MERGESONDE VAP that produces a daily file of atmospheric state variables (temperature, humidity, pressure, and winds) from radiosonde soundings, the microwave radiometer, and surface meteorological instruments. INTERPSONDE includes many of the same sophisticated scaling/interpolation/smoothing schemes that are the hallmark

171

Convection-Allowing and Convection-Parameterizing Ensemble Forecasts of a Mesoscale Convective Vortex and Associated Severe Weather Environment  

Science Conference Proceedings (OSTI)

An analysis of a regional severe weather outbreak that was related to a mesoscale convective vortex (MCV) is performed. The MCV-spawning mesoscale convection system (MCS) formed in northwest Kansas along the southern periphery of a large cutoff ...

Adam J. Clark; William A. Gallus Jr.; Ming Xue; Fanyou Kong

2010-08-01T23:59:59.000Z

172

A Climatology of Midlatitude Continental Clouds from the ARM SGP Central Facility: Part I: Low-Level Cloud Macrophysical, Microphysical, and Radiative Properties  

Science Conference Proceedings (OSTI)

A record of single-layer and overcast low cloud (stratus) properties has been generated using approximately 4000 h of data collected from January 1997 to December 2002 at the Atmospheric Radiation Measurement (ARM) Southern Great Plains Central ...

Xiquan Dong; Patrick Minnis; Baike Xi

2005-05-01T23:59:59.000Z

173

Convectively Coupled Waves in a Sheared Environment  

Science Conference Proceedings (OSTI)

A linear stability analysis, about a radiative–convective equilibrium in a sheared environment, on an equatorial beta plane, for a simple multicloud model for organized tropical convection is presented here. Both vertical/baroclinic and ...

Ying Han; Boualem Khouider

2010-09-01T23:59:59.000Z

174

Predicting the Movement of Mesoscale Convective Complexes  

Science Conference Proceedings (OSTI)

A procedure for operationally predicting the movement of the mesobeta-scale convective elements responsible for the heavy rain in mesocale convective complexes is presented. The procedure is based on the well-known concepts that the motion of ...

S. F. Corfidi; J. H. Meritt; J. M. Fritsch

1996-03-01T23:59:59.000Z

175

Helicity and Thermal Convection with Shear  

Science Conference Proceedings (OSTI)

The relations between nonlinear energy transport and helicity of the flow are studied through simulations of thermal convection with mean shear. Parallel-plate convection with a rotating mean shear, a linear undirectional shear, a parabolic ...

Wan-Shu Wu; Douglas K. Lilly; Robert M. Kerr

1992-10-01T23:59:59.000Z

176

Preconditioning Deep Convection with Cumulus Congestus  

Science Conference Proceedings (OSTI)

Recent studies have pushed forward the idea that congestus clouds, through their moistening of the atmosphere, could promote deep convection. On the other hand, older studies have tended to relate convective initiation to the large-scale forcing. ...

Cathy Hohenegger; Bjorn Stevens

2013-02-01T23:59:59.000Z

177

A Transilient Matrix for Moist Convection  

Science Conference Proceedings (OSTI)

A method is introduced for diagnosing a transilient matrix for moist convection. This transilient matrix quantifies the nonlocal transport of air by convective eddies: for every height z, it gives the distribution of starting heights z? for the ...

David M. Romps; Zhiming Kuang

2011-09-01T23:59:59.000Z

178

Relationship between the Midlatitude Tropopause Potential Temperature and the Thermodynamics of Surface Air  

Science Conference Proceedings (OSTI)

It is postulated that a simple relationship exists between the thermodynamic state of surface air supporting severe storm convection and the potential temperature of the overlaying tropopause. The thesis is tested using tropopause observations ...

George Chimonas; Robert J. Rossi

1989-07-01T23:59:59.000Z

179

Structure of a Midlatitude Squall Line Formed in Strong Unidirectional Shear  

Science Conference Proceedings (OSTI)

Data from five Doppler radars, the surface mesonet, aircraft, and rawinsondes from the Cooperative Convective Precipitation Experiment (CCOPE) are used to document the structure and evolution of a squall line with unusually persistent cells and ...

J. C. Fankhauser; G. M. Barnes; M. A. LeMone

1992-02-01T23:59:59.000Z

180

Application of the 85 GHz ice scattering signature to a global study of mesoscale convective systems  

E-Print Network (OSTI)

It has long been observed that tropical convection tends to cluster, organizing into multicellular mesoscale convective systems (MCS), In convective towers, updrafts on the order of 10 m s-I favor the formation of large, precipitation-sized ice, which strongly scatters upwelling 85 GHz radiation. The 85 GHz brightness temperature is related to the amount of ice in an MCS and, indirectly, to the strength of the updrafts producing the ice. This study used an objective technique to identify MCSs from the Special Sensor Microwave/Imager's 85 GHz channel to describe the size, intensity, and geographic distribution of MCSs between 35'N and 35'S for January, April, July, and October 1993. An MCS was defined as an area at least 2000 km 2 of 85 GHz polarization corrected brightness temperatures 1 0 5 @) MCSS. Over the oceans, median brightness temperature depression was 20-30 K below 225 K, while over land, it was 35-45 K below 225 K. Tropical Africa had the coldest median minimum brightness temperature. The sub-tropical oceans had the warmest median minimum brightness temperatures. MCSs were 35% more frequent over the oceans at sunrise than at sunset, and 60% more frequent over tropical continents at sunset than at sunrise. Both continental and oceanic MCSs tended to be larger at sunrise than at sunset. Continental MCSs tended to be colder at sunset than at sunrise, but oceanic MCSs tended to be marginally colder at sunrise than at sunset. In general, continental MCSs appeared to be smaller and more intense than oceanic MCSS, and the largest and the most intense MCSs occurred more frequently in the sub-tropics.

Devlin, Karen Irene

1995-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "midlatitude continental convective" 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

Outer Continental Shelf Lands Act | Open Energy Information  

Open Energy Info (EERE)

Outer Continental Shelf Lands Act Outer Continental Shelf Lands Act Jump to: navigation, search Statute Name Outer Continental Shelf Lands Act Year 1953 Url [[File:|160px|link=]] Description References Outer Continental Shelf Lands Act pdf[1] This article is a stub. You can help OpenEI by expanding it. Enacted in 1953, the Outer Continental Lands Act provides for the jurisdiction of the United States over the submerged lands of the outer Continental Shelf, and authorizes the Secretary of the Interior to lease such lands for certain purposes. "It is hereby declared to be the policy of the United States that- (1) the subsoil and seabed of the outer Continental Shelf appertain to the United States and are subject to its jurisdiction, control, and power of disposition as provided in this Act..."

182

A transilient matrix for moist convection  

SciTech Connect

A method is introduced for diagnosing a transilient matrix for moist convection. This transilient matrix quantifies the nonlocal transport of air by convective eddies: for every height z, it gives the distribution of starting heights z{prime} for the eddies that arrive at z. In a cloud-resolving simulation of deep convection, the transilient matrix shows that two-thirds of the subcloud air convecting into the free troposphere originates from within 100 m of the surface. This finding clarifies which initial height to use when calculating convective available potential energy from soundings of the tropical troposphere.

Romps, D.; Kuang, Z.

2011-08-15T23:59:59.000Z

183

xu-km-99.PDF  

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

Updraft and Downdraft Statistics of Simulated Tropical Updraft and Downdraft Statistics of Simulated Tropical and Midlatitude Cumulus Convection K.-M. Xu and D. A. Randall Department of Atmospheric Science Colorado State University Fort Collins, Colorado Introduction The statistics of updrafts and downdrafts were substantially different between tropical/subtropical and midlatitude continental cumulus convection (LeMone and Zipser 1980; Lucas et al. 1994). The Thunderstorm Project (Byers and Braham 1949) provided the only statistics for midlatitude continental convection. Recent aircraft observations over tropical oceans also suggested that the averaged thermal buoyancy of downdrafts was positive and similar to that of updrafts (Jorgensen and LeMone 1989; Lucas et al. 1994; Wei et al. 1998; Igau et al. 1999). Updrafts with negative buoyancies were also frequently observed.

184

Northern Gulf of Mexico Continental Shelf Stock  

E-Print Network (OSTI)

waters from 20 to 200m deep in the northern Gulf from the U.S.-Mexican border to the Florida Keys (Figure 1). Both “coastal ” and “offshore ” ecotypes of bottlenose dolphins occur in the Gulf of Mexico (Hersh and Duffield 1990; LeDuc and Curry 1998). The Continental Shelf Stock probably consists of a mixture of both the coastal and offshore ecotypes. The offshore and coastal ecotypes are genetically distinct using both mitochondrial and nuclear markers (Hoelzel et al. 1998). In the northwestern Atlantic, Torres et al. (2003) found a statistically significant break in the distribution of the ecotypes at 34 km from shore. The offshore ecotype was found exclusively seaward of 34km and in waters deeper than 34 m. Within 7.5km of shore, all animals were of the coastal ecotype. The continental shelf is much wider in the Gulf of Mexico so these results may not apply. The continental shelf stock range may extend into Mexican and Cuban territorial waters; however, there are no available estimates of either abundance or mortality from those countries. A stranded dolphin from the Florida Panhandle was rehabilitated and released over the shelf off western Florida, and traveled into the Atlantic Ocean (Wells et al. 1999). The bottlenose dolphins inhabiting waters <20m deep in

Bottlenose Dolphin (tursiops Truncatus Truncatus

2012-01-01T23:59:59.000Z

185

The Resonant Response of Interannual Baroclinic Rossby Waves to Wind Forcing in the Eastern Midlatitude North Pacific  

Science Conference Proceedings (OSTI)

During the four year period 1976–80, mesoscale anomalies of 300 m temperature in the eastern midlatitude North Pacific were observed propagating westward from the coast of North America to 165°W at approximately 2 cm s?1, with characteristics ...

Warren B. White

1985-04-01T23:59:59.000Z

186

The Occurrence of Particle Size Distribution Bimodality in Midlatitude Cirrus as Inferred from Ground-Based Remote Sensing Data  

Science Conference Proceedings (OSTI)

Data collected in midlatitude cirrus clouds by instruments on jet aircraft typically show particle size distributions that have distinct distribution modes in both the 10–30-?m maximum dimension (D) size range and the 200–300-?m D size range or ...

Yang Zhao; Gerald G. Mace; Jennifer M. Comstock

2011-06-01T23:59:59.000Z

187

Wind Driven Flow in the Mixed Layer Observed by Drifting Buoys during Autumn–Winter in the Midlatitude North Pacific  

Science Conference Proceedings (OSTI)

Wind-driven flow in the upper 90 meters during autumn–winter in the midlatitude North Pacific is investigated using satellite-traced drifting buoys (i.e., drifters) deployed nearly simultaneously but drogued at different depths. The difference in ...

G. J. McNally; W. B. White

1985-06-01T23:59:59.000Z

188

In Situ Aircraft Measurements of the Vertical Distribution of Liquid and Ice Water Content in Midlatitude Mixed-Phase Clouds  

Science Conference Proceedings (OSTI)

The vertical distribution of liquid and ice water content and their partitioning is studied using 34 cases of in situ measured microphysical properties in midlatitude mixed-phase clouds, with liquid water path ranging from near zero to ~248 g m?2, ...

Yoo-Jeong Noh; Curtis J. Seaman; Thomas H. Vonder Haar; Guosheng Liu

2013-01-01T23:59:59.000Z

189

Classification of Ice Crystal Shapes in Midlatitude Ice Clouds from Three Years of Lidar Observations over the SIRTA Observatory  

Science Conference Proceedings (OSTI)

This paper presents a study of ice crystal shapes in midlatitude ice clouds inferred from a technique based on the comparison of ray-tracing simulations with lidar depolarization ratio measured at 532 nm. This technique is applied to three years ...

Vincent Noel; Helene Chepfer; Martial Haeffelin; Yohann Morille

2006-11-01T23:59:59.000Z

190

Water-bearing minerals on mars: source of observed mid-latitude water?  

DOE Green Energy (OSTI)

The Odyssey spacecraft documented the existence of heterogeneously distributed hydrogen at martian mid-latitudes, suggesting that large areas of the near-equatorial highlands contain near-surface deposits of 'chemically and/or physically bound H20 and/or OH' in amounts up to 3 .8% equivalent H20. Shallow occurrences of water ice are not stable near the martian equator, making the hydrogen deposits at these latitudes somewhat enigmatic. Clay minerals and zeolites have both been proposed as possible water-bearing constituents on Mars, and both are common terrestrial alteration products of hydrovolcanic basaltic ashes and palagonitic material comparable to those that may be widespread on Mars. Smectites within martian meteorites, attributed to hydrous alteration on Mars rather than on Earth, provide direct evidence of clay minerals from Mars. In addition, new thermal emission spectrometer (TES) data provide good evidence for unspecified zeolites in martian surface dust [6] . The nature of the hydrogen-containing material observed in the equatorial martian regolith is of particular importance to the question of whether hydrous minerals have formed in the past on Mars. Also, whether these minerals exist in a hydrated (i .e., containing H2O molecules in their structures) or dehydrated state is a crucial question . The existence of hydrous minerals is also important in connection with their possible role in affecting the diurnal variation of the martian atmosphere, in their potential role in unraveling the paleohydrology and paleobiology of Mars, and in their possible use as a water resource to support exploration of the martian mid-latitudes.

Bish, D. L. (David L.); Carey, J. W. (James W.); Fialips, C. I. (Clair I.)

2003-01-01T23:59:59.000Z

191

ARM - Evaluation Product - Convective Vertical Velocity  

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

ProductsConvective Vertical Velocity ProductsConvective Vertical Velocity Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Evaluation Product : Convective Vertical Velocity 2011.04.25 - 2011.05.23 Site(s) SGP General Description Convective processes play an important role in Earth's energy balance by distributing heat and moisture throughout the atmosphere. In particular, vertical air motions associated with these processes are inherently linked to the life cycle of these convective systems and are therefore directly tied to their energy budget. However, direct measurements of vertical air motions (e.g., in situ aircraft observations) are sparse, making it difficult to compare them with numerical model output, which relies on convective parameterization schemes that have yet to be extensively

192

Sensitivity of Convective Cloud Growth to Mesoscale Lifting: A Numerical Analysis of Mesoscale Convective Triggering  

Science Conference Proceedings (OSTI)

Numerical model simulation of mesoscale lifting of the convective environment indicates that the ability of the environment to develop deep moist convection increases as mesoscale lifting increases. Mesoscale lifting produces increases in modeled ...

David A. Matthews; Bernard A. Silverman

1980-07-01T23:59:59.000Z

193

Convective Inhibition as a Predictor of Convection during AVE-SESAME II  

Science Conference Proceedings (OSTI)

The AVE-SESAME 11 data set of 19 April 1979 is examined to determine the thermodynamic conditions prior to the onset of deep convection in western Kansas. The observations indicate that the convective region was characterized locally by ...

Frank P. Colby Jr.

1984-11-01T23:59:59.000Z

194

Convective Evolution and Merger in the FACE Experimental Area: Mesoscale Convection and Boundary Layer Interactions  

Science Conference Proceedings (OSTI)

This paper investigates the interactions between the various scales of motion and, specifically, the inter-actions between convection and the surface boundary layer in the development of a mesoscale convective system within the Florida Area ...

John B. Cunning; Ronald L. Holle; Patrick T. Gannon; Andrew I. Watson

1982-07-01T23:59:59.000Z

195

Interactions between Shallow and Deep Convection under a Finite Departure from Convective Quasi Equilibrium  

Science Conference Proceedings (OSTI)

The present paper presents a simple theory for the transformation of nonprecipitating, shallow convection into precipitating, deep convective clouds. To make the pertinent point a much idealized system is considered, consisting only of shallow and ...

Jun-Ichi Yano; Robert Plant

2012-12-01T23:59:59.000Z

196

Mesoscale Convective Vortices Observed during BAMEX. Part II: Influences on Secondary Deep Convection  

Science Conference Proceedings (OSTI)

Observations from the Bow Echo and Mesoscale Convective Vortex (MCV) Experiment are used to examine the role of the five mesoscale convective vortices described in Part I on heavy precipitation during the daytime heating cycle. Persistent ...

Stanley B. Trier; Christopher A. Davis

2007-06-01T23:59:59.000Z

197

Sensitivity of Forecast Rainfall in a Texas Convective System to Soil Moisture and Convective Parameterization  

Science Conference Proceedings (OSTI)

The impact of soil moisture on the forecast of a small-scale convective system, and sensitivity of results to the convective parameterization used, are investigated through Eta Model simulations (run in an operational-like setting) of a ...

William A. Gallus Jr.; Moti Segal

2000-10-01T23:59:59.000Z

198

A Parameter Study of Interactions Between Convective Clouds, the Convective Boundary Layer, and a Forested Surface  

Science Conference Proceedings (OSTI)

A numerical model was developed which included cloud parameterizations, a convective boundary layer, solar and longwave radiation, a soil layer and a parameterized forest layer. The model simulated the growth of the convective boundary layer and ...

Alfred J. Garrett

1982-08-01T23:59:59.000Z

199

Multiscale Convective Overturning in Mesoscale Convective Systems: Reconciling Observations, Simulations, and Theory  

Science Conference Proceedings (OSTI)

An analysis of how parameterized convection interacts with hydrostatic, explicitly resolved precipitation processes to represent multiscale convective overturning in a mesoscale-resolution numerical simulation is presented. Critically important ...

John S. Kain; J. Michael Fritsch

1998-08-01T23:59:59.000Z

200

Thermodynamic Variability within the Convective Boundary Layer Due to Horizontal Convective Rolls  

Science Conference Proceedings (OSTI)

Data from the Convection and Precipitation/Electrification (CaPE) Experiment conducted during the summer of 1991 are used to examine and quantify the horizontal variability of temperature and moisture within the convective boundary layer (CBL). ...

Tammy M. Weckwerth; James W. Wilson; Roger M. Wakimoto

1996-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "midlatitude continental convective" 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

Federal Outer Continental Shelf Oil and Gas Production Statistics...  

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

Statistics Energy Data Apps Maps Challenges Resources Blogs Let's Talk Energy Beta You are here Data.gov Communities Energy Data Federal Outer Continental Shelf Oil and...

202

Federal Outer Continental Shelf Oil and Gas Production Statistics...  

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

ALASKA Energy Data Apps Maps Challenges Resources Blogs Let's Talk Energy Beta You are here Data.gov Communities Energy Data Federal Outer Continental Shelf Oil and Gas...

203

Federal Outer Continental Shelf Oil and Gas Production Statistics...  

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

Pacific Energy Data Apps Maps Challenges Resources Blogs Let's Talk Energy Beta You are here Data.gov Communities Energy Data Federal Outer Continental Shelf Oil and Gas...

204

Digital Offshore Cadastre (DOC) - Pacific83 Â? Continental...  

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

Continental Shelf Boundaries Ocean Data Tools Technical Guide Map Gallery Regional Planning Feedback Ocean You are here Data.gov Communities Ocean Data Digital...

205

Atlantic NAD 83 Continental Shelf Boundary (CSB) | Data.gov  

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

Continental Shelf Boundary (CSB) Ocean Data Tools Technical Guide Map Gallery Regional Planning Feedback Ocean You are here Data.gov Communities Ocean Data Atlantic NAD 83...

206

Federal Outer Continental Shelf Oil and Gas Production Statistics...  

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

Tags Minerals Management Service, MMS, Production, natural gas, gas, condensate, crude oil, oil, OCS production, Outer Continental Shelf, OSC, EIA, Energy Information...

207

Tropical Pacific impacts of convective momentum ... - Springer  

Science Conference Proceedings (OSTI)

MJO and monsoons, either directly by changing the atmospheric response to convection, or indirectly by altering the background climatology and ENSO. In fact

208

Technical Sessions Parameterization of Convective Clouds, Mesoscale...  

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

and Convective-Generated Clouds W. R. Cotton Department of Atmospheric Science Colorado State University Fort Collins, CO 80523 This presentation is a summary of research...

209

Geothermal: Sponsored by OSTI -- Improving Convection Parameterization...  

Office of Scientific and Technical Information (OSTI)

Improving Convection Parameterization Using ARM Observations and NCAR Community Atmosphere Model Geothermal Technologies Legacy Collection HelpFAQ | Site Map | Contact Us | Admin...

210

The Effects of Condensational Heating on Midlatitude Transient Waves in Their Mature Stage: Control Experiments with a GFDL General Circulation model  

Science Conference Proceedings (OSTI)

The effects of condensational heating on midlatitude transient waves in their mature stage are re-examined by comparing moist and dry GFDL spectral general circulation models, both of which have all ocean surfaces with prescribed zonally uniform ...

Y. Hayashi; D. G. Golder

1981-11-01T23:59:59.000Z

211

The Influence of Midlatitude Ocean–Atmosphere Coupling on the Low-Frequency Variability of a GCM. Part I: No Tropical SST Forcing  

Science Conference Proceedings (OSTI)

This study examines the extent to which the thermodynamic interactions between the midlatitude atmosphere and the underlying oceanic mixed layer contribute to the low-frequency atmospheric variability. A general circulation model, run under ...

Ileana Bladé

1997-08-01T23:59:59.000Z

212

Parameterization of Convective Momentum Transport in Highly Baroclinic Conditions  

Science Conference Proceedings (OSTI)

The organization of convection by vertical shear strongly affects the transport of horizontal momentum, yet the concept of organization has received little attention in convective parameterization. Here the focus is on open-cellular convection in ...

Vanda Grubiši?; Mitchell W. Moncrieff

2000-09-01T23:59:59.000Z

213

Structure of the Atmosphere in Radiative–Convective Equilibrium  

Science Conference Proceedings (OSTI)

To investigate water vapor transport in an atmosphere in radiative–convective equilibrium, a simplified dynamical convection model (DCM) was constructed that explicitly models moist convection and longwave radiation in a gray atmosphere. In the ...

Yoshiharu Iwasa; Yutaka Abe; Hiroshi Tanaka

2002-07-01T23:59:59.000Z

214

Elevated Convection and Castellanus: Ambiguities, Significance, and Questions  

Science Conference Proceedings (OSTI)

The term elevated convection is used to describe convection where the constituent air parcels originate from a layer above the planetary boundary layer. Because elevated convection can produce severe hail, damaging surface wind, and excessive ...

Stephen F. Corfidi; Sarah J. Corfidi; David M. Schultz

2008-12-01T23:59:59.000Z

215

Deep Convection and “First Echoes” within Anvil Precipitation  

Science Conference Proceedings (OSTI)

The development of convective cells within anvil precipitation, in a region of moderate convective activity that might be called a small mesoscale convective system, is described and discussed. The presence of precipitation-sized hydrometeors in ...

Charles A. Knight; L. Jay Miller; William D. Hall

2004-07-01T23:59:59.000Z

216

Relationships between Convective Storm Kinematics, Precipitation, and Lightning  

Science Conference Proceedings (OSTI)

Combined multiparameter radar, dual-Doppler, thermodynamic sounding, and lightning observations of 11 thunderstorms (6 from the midlatitudes, 5 from the Tropics) are examined. The thunderstorms span a wide spectrum of intensities, from weak ...

Timothy J. Lang; Steven A. Rutledge

2002-10-01T23:59:59.000Z

217

A Laboratory Model of Cooling over the Continental Shelf  

Science Conference Proceedings (OSTI)

A laboratory experiment is conducted where hot water is cooled by exposure to air in a cylindrical rotating tank with a flat shallow outer “continental shelf” region next to a sloping “continental slope” bottom and a flat “deep ocean” center. It ...

J. A. Whitehead

1993-11-01T23:59:59.000Z

218

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

219

Convection Initiation and Downburst Experiment (CINDE)  

Science Conference Proceedings (OSTI)

The Convection Initiation and Downburst Experiment (CINDE) was conducted in the Denver, Colorado area from 22 June to 7 August 1987 to study processes leading to the formation of deep convection and the physics of downbursts. A total of 6 Doppler ...

James W. Wilson; James A. Moore; G. Brant Foote; Brooks Martner; Taneil Uttal; James M. Wilczak; Alfred R. Rodi

1988-11-01T23:59:59.000Z

220

Nature versus Nurture in Shallow Convection  

Science Conference Proceedings (OSTI)

Tracers are used in a large-eddy simulation of shallow convection to show that stochastic entrainment (and not cloud-base properties) determines the fate of convecting parcels. The tracers are used to diagnose the correlations between a parcel’s ...

David M. Romps; Zhiming Kuang

2010-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "midlatitude continental convective" 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

Mid-latitude composition of mars from thermal and epithermal neutrons  

DOE Green Energy (OSTI)

Epithermal neutron data acquired by Mars Odyssey have been analyzed to determine global maps of water-equivalent hydrogen abundance. By assuming that hydrogen was distributed uniformly with depth within the surface, a map of minimum water abundance was obtained. The addition of thermal neutrons to this analysis could provide information needed to determine water stratigraphy. For example, thermal and epithermal neutrons have been used together to determine the depth and abundance of waterequivalent hydrogen of a buried layer in the south polar region. Because the emission of thermal neutrons from the Martian surface is sensitive to absorption by elements other than hydrogen, analysis of stratigraphy requires that the abundance of these elements be known. For example, recently published studies of the south polar region assumed that the Mars Pathfinder mean soil composition is representative of the regional soil composition, This assumption is partially motivated by the fact that Mars appears to have a well-mixed global dust cover and that the Pathfinder soil composition is representative of the mean composition of the Martian surface. In this study, we have analyzed thermal and epithermal neutron data measured by the neutron spectrometer subsystem of the gamma ray spectrometer to determine the spatial distribution of the composition of elements other than hydrogen. We have restricted our analysis to mid-latitude regions for which we have corrected the neutron counting data for variations in atmospheric thickness.

Prettyman, T. H. (Thomas H.); Feldman, W. C. (William C.); Elphic, R. C. (Richard C.); Boynton, W. V. (William V.); Bish, D. L. (David L.); Vaniman, D. T. (David T.); Funsten, H. O. (Herbert O.); Lawrence, David J. (David Jeffery),; Maurice, S. (Sylvestre); McKinney, G. W. (Gregg W.); Moore, K. R. (Kurt R.); Tokar, R. L. (Robert L.)

2003-01-01T23:59:59.000Z

222

Can hydrous minerals account for the observed mid-latitude water on Mars?  

DOE Green Energy (OSTI)

Great interest was generated with the discovery by the Odyssey spacecraft OC heterogeneously distributed hydrogcn at martian mid-latitudes, suggesting that large areas of the near-equatorial highlands contain near-surface deposits of 'chemically and/or physically bound 1120 and/or OH' in amounts up to 3.8% equivalent H20. More recent interpretations of the Odyssey data using new calibrations suggest that some near-equatorial areas, such as Arabia Terra, contain up to 8.5f I .3% water-equivalent hydrogen. Such shallow occurrences (

Bish, D. L. (David L.); Vaniman, D. T. (David T.); Fialips, C. I. (Clair I.); Carey, J. W. (James W.); Feldman, W. C. (William C.)

2003-01-01T23:59:59.000Z

223

Federal Outer Continental Shelf Oil and Gas Production Statistics - Pacific  

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

Pacific Pacific Energy Data Apps Maps Challenges Resources Blogs Let's Talk Energy Beta You are here Data.gov » Communities » Energy » Data Federal Outer Continental Shelf Oil and Gas Production Statistics - Pacific Dataset Summary Description Federal Outer Continental Shelf Oil and Gas Production Statistics for the Pacific by month and summarized annually. Tags {"Minerals Management Service",MMS,Production,"natural gas",gas,condensate,"crude oil",oil,"OCS production","Outer Continental Shelf",OSC,EIA,"Energy Information Agency",federal,DOE,"Department of Energy",DOI,"Department of the Interior","Pacific "} Dataset Ratings Overall 0 No votes yet Data Utility 0 No votes yet Usefulness

224

Convective heat transfer inside passive solar buildings  

DOE Green Energy (OSTI)

Natural convection between spaces in a building can play a major role in energy transfer. Two situations are investigated: convection through a single doorway into a remote room, and a convective loop in a two-story house with a south sunspace where a north stairway serves as the return path. A doorway-sizing equation is given for the single-door case. Detailed data are given from the monitoring of airflow in one two-story house and summary data are given for five others. Observations on the nature of the airflow and design guidelines are presented.

Jones, R.W.; Balcomb, J.D.; Yamaguchi, K.

1983-01-01T23:59:59.000Z

225

Climate Sensitivity to Continental Ice Sheet Size and Configuration  

Science Conference Proceedings (OSTI)

A version of the NCAR Community Climate Model (CCM) has been used to carry out a study of climate sensitivity to the size and distribution of continental ice sheets by comparing two perpetual season, fixed sea surface temperature (SST), winter ...

Richard A. Shinn; Eric J. Barron

1989-12-01T23:59:59.000Z

226

Sensitivity of 30-Day Dynamical Forecasts to Continental Snow cover  

Science Conference Proceedings (OSTI)

Several series of 30-day simulations with a global simulation model are used to evaluate the sensitivities to continental snow cover over North America and Eurasia. The model is initialized with National Meteorological Center analyses for ...

John E. Walsh; Becky Ross

1988-07-01T23:59:59.000Z

227

Countergradient vorticity Flux Generated in Continental Boundary Currents  

Science Conference Proceedings (OSTI)

It is suggested that the inshore shear of continental boundary flows like the Florida Current can be accounted for by a countergradient vorticity flux, rather than by lateral diffusion to the shore. Two simple barotropic models with cross-stream ...

Melvin E. Stern

1991-11-01T23:59:59.000Z

228

Multimodel Ensemble Reconstruction of Drought over the Continental United States  

Science Conference Proceedings (OSTI)

Retrospectively simulated soil moisture from an ensemble of six land surface/hydrological models was used to reconstruct drought events over the continental United States for the period 1920–2003. The simulations were performed at one-half-degree ...

Aihui Wang; Theodore J. Bohn; Sarith P. Mahanama; Randal D. Koster; Dennis P. Lettenmaier

2009-05-01T23:59:59.000Z

229

Geothermal: Sponsored by OSTI -- Selected data fron continental...  

Office of Scientific and Technical Information (OSTI)

Selected data fron continental scientific drilling core holes VC-1 and VC-2a, Valles Caldera, New Mexico Geothermal Technologies Legacy Collection HelpFAQ | Site Map | Contact Us...

230

Impact of Atmospheric Forcing on Antarctic Continental Shelf Water Masses  

Science Conference Proceedings (OSTI)

The Antarctic continental shelf seas feature a bimodal distribution of water mass temperature, with the Amundsen and Bellingshausen Seas flooded by Circumpolar Deep Water that is several degrees Celsius warmer than the cold shelf waters prevalent ...

Alek A. Petty; Daniel L. Feltham; Paul R. Holland

2013-05-01T23:59:59.000Z

231

Relative Humidity over the West Florida Continental Shelf  

Science Conference Proceedings (OSTI)

Observed relative humidity variations on the coastal ocean of the West Florida Continental Shelf (WFS) are examined over the 5-yr period 1998–2003. Despite considerable daily variability within seasons, the monthly mean values are nearly constant ...

J. I. Virmani; R. H. Weisberg

2005-06-01T23:59:59.000Z

232

Observations of Boundary Mixing over the Continental Slope  

Science Conference Proceedings (OSTI)

Observations of mixing over the continental slope using a towed body reveal a great lateral extent (several kilometers) of continuously turbulent fluid within a few hundred meters of the boundary at depth 1600 m. The largest turbulent dissipation ...

J. N. Moum; D. R. Caldwell; J. D. Nash; G. D. Gunderson

2002-07-01T23:59:59.000Z

233

Microphysics of Raindrop Size Spectra: Tropical Continental and Maritime Storms  

Science Conference Proceedings (OSTI)

This work uses raindrop size spectra measured at the surface in tropical continental storms to determine the associated parameters of the best-fit gamma distributions. The physical processes responsible for those parameters and their relations to ...

Carlton W. Ulbrich; David Atlas

2007-11-01T23:59:59.000Z

234

Satellite Evidence of Enhanced Upwelling Along the European Continental Slope  

Science Conference Proceedings (OSTI)

TIROS-N AVHRR imagery is used to describe a persistent but localized band of upwelling which follows the contours of the European continental slope from the Porcupine Seabight (southwest of Ireland) to the Bay of Biscay. Its persistent occurrence,...

Robert R. Dickson; Paul A. Gurbutt; V. Narayana Pillai

1980-05-01T23:59:59.000Z

235

Diffraction of Continental Shelf Waves by Irregular Alongshore Geometry  

Science Conference Proceedings (OSTI)

Diffraction of continental shelf waves by irregular alongshore geometry, such as ridges, canyons and bumps, is examined. The full barotropic, shelf-wave equation is treated, and the solutions include forward and back scattering, and a description ...

Dong-Ping Wang

1980-08-01T23:59:59.000Z

236

Propagation of Barotropic Continental Shelf Waves over Irregular Bottom Topography  

Science Conference Proceedings (OSTI)

Using a geometry which roughly approximates that of a typical continental shelf and slope, the effects of a random bottom topography on free barotropic shelf waves are found. The bathymetric irregularity induces damping of the coherent wave due ...

K. H. Brink

1980-05-01T23:59:59.000Z

237

Continental Shelf Circulation Induced by a Moving, Localized Wind Stress  

Science Conference Proceedings (OSTI)

A linear, two-dimensional model of a rotating, stratified fluid is constructed to investigate the circulation induced by a moving, localized line of surface stress. This model is used to analyze the effect of moving cold fronts on continental ...

John M. Klinck; Leonard J. Pietrafesa; Gerald S. Janowitz

1981-06-01T23:59:59.000Z

238

The Propagation of Gravity Currents along Continental Shelves  

Science Conference Proceedings (OSTI)

An analytical method for computing the speed at which the nose of a light (rotating) intrusion advances along a continental shelf is proposed. The nonlinear model includes two active layer; the intrusion itself, which occupies the entire shelf (...

Doron Nof; Stephen Van Gorder

1988-03-01T23:59:59.000Z

239

Continental Shelf Parameters Inferred from SAR Internal Wave Observations  

Science Conference Proceedings (OSTI)

This paper presents preliminary results on the use of synthetic aperture radar (SAR) imagery to extract oceanographic information about the continental shelf. From late spring through early fall the thermocline on the shelf is fully developed and ...

D. L. Porter; D. R. Thompson

1999-04-01T23:59:59.000Z

240

Mesoscale Simulations of the Land Surface Effects of Historical Logging in a Moist Continental Climate Regime  

Science Conference Proceedings (OSTI)

An enhanced knowledge of the feedbacks from land surface changes on regional climates is of great importance in the attribution of climate change. To explore the effects of deforestation on a midlatitude climate regime, two sets of two five-...

Nicholas P. Klingaman; Jason Butke; Daniel J. Leathers; Kevin R. Brinson; Elsa Nickl

2008-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "midlatitude continental convective" 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

A General Framework for Convective Trigger Functions  

Science Conference Proceedings (OSTI)

A general framework for the trigger function used in convective parameterization routines in mesoscale models is proposed. The framework is based on the diagnosis of the accessibility of potential buoyant energy. Specifically, the trigger ...

Robert F. Rogers; J. M. Fritsch

1996-11-01T23:59:59.000Z

242

Observations and Modeling of Banded Orographic Convection  

Science Conference Proceedings (OSTI)

Radar images and numerical simulations of three shallow convective precipitation events over the Coastal Range in western Oregon are presented. In one of these events, unusually well-defined quasi-stationary banded formations produced large ...

Daniel J. Kirshbaum; Dale R. Durran

2005-05-01T23:59:59.000Z

243

Convective Systems of the North Australian Monsoon  

Science Conference Proceedings (OSTI)

The climatology of convection over northern Australia and the surrounding oceans, based on six wet seasons (September–April), is derived from the Japanese Meteorological Agency Geostationary Meteorological Satellite-5 (GMS-5) IR1 channel for the ...

Mick Pope; Christian Jakob; Michael J. Reeder

2008-10-01T23:59:59.000Z

244

Doppler Radar Sampling Limitations in Convective Storms  

Science Conference Proceedings (OSTI)

Vertical air motion data from a T-28 aircraft were filtered and sampled to simulate Doppler radar measurements. The results suggest that multiple Doppler radar analyses are subject to potentially large spatial aliasing errors in deep convection ...

R. E. Carbone; M. J. Carpenter; C. D. Burghart

1985-09-01T23:59:59.000Z

245

Tracer dispersion in the turbulent convective layer  

Science Conference Proceedings (OSTI)

Experimental results for passive tracer dispersion in the turbulent surface layer under convective conditions are presented. In this case, the dispersion of tracer particles is determined by the interplay of two mechanisms: buoyancy and advection. ...

Alex Skvortsov; Milan Jamriska; Timothy C. DuBois

246

Convective Squalls over the Eastern Equatorial Atlantic  

Science Conference Proceedings (OSTI)

The Congo Basin and the adjacent equatorial eastern Atlantic are among the most active regions of the world in terms of intense deep moist convection, leading to frequent lightning and severe squalls. Studying the dynamics and climatology of this ...

Florian Berkes; Peter Knippertz; Douglas J. Parker; Gus Jeans; Valérie Quiniou-Ramus

2012-06-01T23:59:59.000Z

247

A Composite Model of Mesoscale Convective Complexes  

Science Conference Proceedings (OSTI)

A composite analysis technique is used to investigate the evolution of mesoscale features of mesoscale convective complexes (MCCs). The early stage of the MCC lifecycle is characterized by convergence, vertical motion and heating being centered ...

William R. Cotton; Ming-Sen Lin; Ray L. McAnelly; Craig J. Tremback

1989-04-01T23:59:59.000Z

248

Climatic Regimes of Tropical Convection and Rainfall  

Science Conference Proceedings (OSTI)

Annual distribution and phase propagation of tropical convection are delineated using harmonic and amplitude-phase characteristics analysis of climatological pentad mean outgoing longwave radiation and monthly frequencies of highly reflective ...

Bin Wang

1994-07-01T23:59:59.000Z

249

Radiation Impacts on Conditionally Unstable Moist Convection  

Science Conference Proceedings (OSTI)

The present work analyzes the impacts of radiative cooling in three-dimensional high-resolution direct numerical simulations of moist Rayleigh–Bénard convection. An atmospheric slab is destabilized by imposing a warm, moist lower boundary and a ...

Olivier Pauluis; Jörg Schumacher

2013-04-01T23:59:59.000Z

250

Measurement of Convective Entrainment Using Lagrangian Particles  

Science Conference Proceedings (OSTI)

Lagrangian particle tracking is used in a large-eddy simulation to study an individual cumulus congestus. This allows for the direct measurement of the convective entrainment rate and of the residence times of entrained parcels within the cloud. ...

Kyongmin Yeo; David M. Romps

2013-01-01T23:59:59.000Z

251

Resolving Convection in a Global Hypohydrostatic Model  

Science Conference Proceedings (OSTI)

Convection cannot be explicitly resolved in general circulation models given their typical grid size of 50 km or larger. However, by multiplying the vertical acceleration in the equation of motion by a constant larger than unity, the horizontal ...

S. T. Garner; D. M. W. Frierson; I. M. Held; O. Pauluis; G. K. Vallis

2007-06-01T23:59:59.000Z

252

Convective Control of ENSO Simulated in MIROC  

Science Conference Proceedings (OSTI)

The high sensitivity of the El Niño–Southern Oscillation (ENSO) to cumulus convection is examined by means of a series of climate simulations using an updated version of the Model for Interdisciplinary Research on Climate (MIROC), called MIROC5. ...

Masahiro Watanabe; Minoru Chikira; Yukiko Imada; Masahide Kimoto

2011-01-01T23:59:59.000Z

253

Estimation of Convective Rainfall from Lightning Observations  

Science Conference Proceedings (OSTI)

The objective of this study is to develop a technique to use lightning observations for estimating convective rainfall. A framework for rainfall estimation is developed in which key elements are 1) the rainfall–lightning ratio, that is, the ...

Alberto Tapia; James A. Smith; Michael Dixon

1998-11-01T23:59:59.000Z

254

Mesoscale Convective Complexes over Southern Africa  

Science Conference Proceedings (OSTI)

The maximum spatial correlation technique (MASCOTTE) is an objective and automated method developed to simultaneously determine both the structural properties and evolution (tracking) of cloud shields of convective systems. Originally designed to ...

R. C. Blamey; C. J. C. Reason

2012-01-01T23:59:59.000Z

255

Soil Moisture Impacts on Convective Margins  

Science Conference Proceedings (OSTI)

An idealized prototype for the location of the margins of tropical land region convection zones is extended to incorporate the effects of soil moisture and associated evaporation. The effect of evaporation, integrated over the inflow trajectory ...

Benjamin R. Lintner; J. David Neelin

2009-08-01T23:59:59.000Z

256

Moist Convection at a Surface Cold Front  

Science Conference Proceedings (OSTI)

The motion of a surface cold front in an environment that is unstable to moist convection is studied with the aid ofboth hydrostatic and nonhydrostatic two-dimensional models. Simulations with the hydrostatic model essentially extend the work ...

N. Andrew Crook

1987-12-01T23:59:59.000Z

257

Rotating Convection Driven by Differential Bottom Heating  

Science Conference Proceedings (OSTI)

Convection experiments were carried out in a rectangular tank as a model of oceanic meridional overturning circulation. The objective was finding a relation between the meridional heat flux and thermal forcing. To make the meridional heat flux ...

Young-Gyu Park; J. A. Whitehead

1999-06-01T23:59:59.000Z

258

Urban Aerosol Impacts on Downwind Convective Storms  

Science Conference Proceedings (OSTI)

The impacts of urban-enhanced aerosol concentrations on convective storm development and precipitation over and downwind of St. Louis, Missouri, are investigated. This is achieved through the use of a cloud-resolving mesoscale model, in which ...

Susan C. van den Heever; William R. Cotton

2007-06-01T23:59:59.000Z

259

OIL AND GAS LEASING ON THE OUTER CONTINENTAL SHELF  

E-Print Network (OSTI)

Oil and Gas Leasing, Exploration, & Development Process Solicit Comments 45-day Comment Period DraftOIL AND GAS LEASING ON THE OUTER CONTINENTAL SHELF M i n e r a l s M a n a g e m e n t S e r v i c e www.mms.gov #12;OIL AND GAS LEASING ON THE OUTER CONTINENTAL SHELF Background The Minerals

Lotko, William

260

Nested-Model Simulation of Moist Convection: The Impact of Coarse-Grid Parameterized Convection on Fine-Grid Resolved Convection  

Science Conference Proceedings (OSTI)

Future-generation, operational, weather prediction systems will likely include storm-scale, limited-area models that will explicitly resolve convective precipitation. However, the high-resolution convection-resolving grids will need to be ...

Thomas T. Warner; Hsiao-Ming Hsu

2000-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "midlatitude continental convective" 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

The Effects of Midlatitude Waves over and around the Tibetan Plateau on Submonthly Variability of the East Asian Summer Monsoon  

Science Conference Proceedings (OSTI)

Convective variability at submonthly time scales (7–25 days) over the Yangtze and Huaihe River basins (YHRBs) and associated large-scale atmospheric circulation during the mei-yu season were examined using interpolated outgoing longwave radiation ...

Hatsuki Fujinami; Tetsuzo Yasunari

2009-07-01T23:59:59.000Z

262

The Formation of a Cooling-induced Mesovortex in the Trailing Stratiform Region of a Midlatitude Squall Line  

Science Conference Proceedings (OSTI)

There have been some ambiguities in recent observational studies as to whether midlevel mesovortices are induced by latent heating or cooling, and develop in the descending or ascending portion of mesoscale convective systems (MCS's). In this ...

Da-Lin Zhang

1992-12-01T23:59:59.000Z

263

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

264

Sensitivity Studies on the Continentality of a Numerically Simulated Cumulonimbus  

Science Conference Proceedings (OSTI)

The cloud model of Tripoli and Cotton was used to simulate a cumulonimbus cloud observed during the Cooperative Convective Precipitation Experiment (CCOPE). We tested the sensitivity of the precipitation pathways in the model to the initial ...

R. Banta; K. R. Hanson

1987-02-01T23:59:59.000Z

265

Small-Scale Variability in Warm Continental Cumulus Clouds  

Science Conference Proceedings (OSTI)

We have analyzed small-scale fluctuations in microphysical, dynamical and thermodynamical parameters measured in two warm cumulus clouds during the Cooperative Convective Precipitation Experiment (CCOPE) project (1981) in light of predictions of ...

P. H. Austin; M. B. Baker; A. M. Blyth; J. B. Jensen

1985-06-01T23:59:59.000Z

266

InterContinental Hotels Group | Open Energy Information  

Open Energy Info (EERE)

InterContinental Hotels Group InterContinental Hotels Group Jump to: navigation, search Name InterContinental Hotels Group Place Salt Lake City, Utah Zip 84130 Website http://www.intercontinentalhot Coordinates 40.7°, -111.94° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":40.7,"lon":-111.94,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

267

Continental Liquid-phase Stratus Clouds at SGP: Meteorological Influences  

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

Continental Liquid-phase Stratus Clouds at SGP: Meteorological Influences Continental Liquid-phase Stratus Clouds at SGP: Meteorological Influences and Relationship to Adiabacity Kim, Byung-Gon Kangnung National University Schwartz, Stephen Brookhaven National Laboratory Miller, Mark Brookhaven National Laboratory Min, Qilong State University of New York at Albany Category: Cloud Properties The microphysical properties of continental stratus clouds observed over SGP appear to be substantially influenced by micrometeorological conditions, such as static stability and updraft velocity. These influences may contribute to the observed weak correlation of aerosol light scattering coefficient with cloud-drop effective radius [Kim et al., JGR, 2003], although aerosol light scattering coefficient is not necessarily the most suitable surrogate aerosol property for number concentration of cloud

268

Modeling Study of a Tropical Squall-Type Convective Line  

Science Conference Proceedings (OSTI)

A multidimensional and time-dependent cloud scale model is used to investigate the dynamic and micro-physical processes associated with convective and stratiform regions within a tropical squall-type convective line. The evolution of the total ...

Wei-Kuo Tao; Joanne Simpson

1989-01-01T23:59:59.000Z

269

Synoptic Environments Associated with the Training of Convective Cells  

Science Conference Proceedings (OSTI)

Many studies have been done on synoptically forced systems and heavy rainfall, but little research has gone into the forecasting of training convective storms specifically in a synoptically forced environment. Training convective storms are ...

Ryan P. Aylward; Jamie L. Dyer

2010-04-01T23:59:59.000Z

270

Mesoscale Convective Complexes over the United States during 1982  

Science Conference Proceedings (OSTI)

An important class of convective weather system, the mesoscale convective complex (MCC), presents many challenges and problems to both the research and operational communities. In addition, thew very large and long-lived thunderstorm systems have ...

D. M. Rodgers; K. W. Howard; E. C. Johnston

1983-12-01T23:59:59.000Z

271

Simulation of Tropical Convective Systems. Part I: A Cumulus Parameterization  

Science Conference Proceedings (OSTI)

A new cumulus parametefization is developed for ffse in mesoscale model simulations of precipitating convective systems. It is designed to estimate convective properties using a cloud model that interacts with the mesoscale model in a physically ...

William M. Frank; Charles Cohen

1987-12-01T23:59:59.000Z

272

Assessing the Vertical Distribution of Convective Available Potential Energy  

Science Conference Proceedings (OSTI)

Comparisons of convective available potential energy (CAPE) with standard instability indices for evaluating the convective potential of the atmosphere such as the lifted index (LI) reveal only moderate correlations. This is because the LI is a ...

David O. Blanchard

1998-09-01T23:59:59.000Z

273

Hydrography of the Labrador Sea during Active Convection  

Science Conference Proceedings (OSTI)

The hydrographic structure of the Labrador Sea during wintertime convection is described. The cruise, part of the Deep Convection Experiment, took place in February–March 1997 amidst an extended period of strong forcing in an otherwise moderate ...

Robert S. Pickart; Daniel J. Torres; R. Allyn Clarke

2002-02-01T23:59:59.000Z

274

Convective Momentum Transport over the Tropical Pacific: Budget Estimates  

Science Conference Proceedings (OSTI)

ECMWF and NCEP–NCAR reanalyses are used to calculate convective momentum transport (CMT) as a momentum budget residual over several tropical oceanic convective regions, including the TOGA COARE Intensive Flux Array (IFA). Sources of uncertainty ...

Matthew T. Carr; Christopher S. Bretherton

2001-07-01T23:59:59.000Z

275

Thermodynamic and Circulation Characteristics, of Winter Monsoon Tropical Mesoscale Convection  

Science Conference Proceedings (OSTI)

During the December 1978 field phase of the International Winter Monsoon Experiment (Winter MONEX), a regular diurnal cycle of deep convective activity occurred over the South China Sea immediately to the north of Borneo. The convection was ...

Richad H. Johnson; Donald C. Kriete

1982-12-01T23:59:59.000Z

276

Mesoscale Convective Complexes over the United States during 1983  

Science Conference Proceedings (OSTI)

Enhanced infrared satellite imagery is used to document the occurrence of mesoscale convective complexes over the United States during 1983. Thirty large convective systems are identified that display satellite-observable characteristics which ...

D. M. Rodgers; M. J. Magnano; J. H. Arns

1985-05-01T23:59:59.000Z

277

Propagating and Standing Components of the Intraseasonal Oscillationin Tropical Convection  

Science Conference Proceedings (OSTI)

Two questions related to the intraseasonal variability of tropical convection and circulation remain controversial. 1) To what degree is the convective component of the Madden–Julian oscillation (MJO) a standing oscillation? 2) Is the eastward ...

Chidong Zhang; Harry H. Hendon

1997-03-01T23:59:59.000Z

278

Multiscale Convective Organization and the YOTC Virtual Global Field Campaign  

Science Conference Proceedings (OSTI)

The Year of Tropical Convection (YOTC) project recognizes that major improvements are needed in how the tropics are represented in climate models. Tropical convection is organized into multiscale precipitation systems with an underlying chaotic order. ...

Mitchell W. Moncrieff; Duane E. Waliser; Martin J. Miller; Melvyn A. Shapiro; Ghassem R. Asrar; James Caughey

2012-08-01T23:59:59.000Z

279

Convection in TOGA COARE: Horizontal Scale, Morphology, and Rainfall Production  

Science Conference Proceedings (OSTI)

The occurrence frequency and rainfall production of mesoscale convective systems (MCSs) relative to smaller groups of convective clouds over the tropical oceans is not well known. Eighty days of shipboard radar data collected during the recent ...

Thomas M. Rickenbach; Steven A. Rutledge

1998-09-01T23:59:59.000Z

280

Effects of Convection Cell Geometry on Simulated Tornadoes  

Science Conference Proceedings (OSTI)

Experimental data and theory suggest that certain convection cell scale factors must be specified for correct interpretation of tornado simulations. The most important nondimensional number appears to be the ratio of convection cell depth (...

Eugene M. Wilkins; Chris J. Diamond

1987-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "midlatitude continental convective" 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

Baroclinic Transition of a Long-Lived Mesoscale Convective Vortex  

Science Conference Proceedings (OSTI)

The period 5–15 June 2003, during the field phase of the Bow Echo and Mesoscale Convective Vortex (MCV) Experiment (BAMEX), was noteworthy for the wide variety of mesoscale convective systems (MCSs) that occurred. Of particular interest was a ...

Thomas J. Galarneau Jr.; Lance F. Bosart; Christopher A. Davis; Ron McTaggart-Cowan

2009-02-01T23:59:59.000Z

282

A Theory for Long-Lived Mesoscale Convective Systems  

Science Conference Proceedings (OSTI)

It is proposed that certain long-lived mesoscale convective systems maintain themselves through an interaction between quasi-balanced vertical motions and the diabatic effects of moist convection. Latent heat release, evaporation and melting of ...

D. J. Raymond; H. Jiang

1990-12-01T23:59:59.000Z

283

Linear Stratospheric Gravity Waves above Convective Thermal Forcing  

Science Conference Proceedings (OSTI)

The spectra of linear gravity waves generated by a time-varying tropospheric thermal forcing representing organized convection are compared to the spectra of stratospheric gravity waves generated by organized convection in a fully nonlinear two-...

Rajul E. Pandya; M. Joan Alexander

1999-07-01T23:59:59.000Z

284

Convective Contribution to the Genesis of Hurricane Ophelia (2005)  

Science Conference Proceedings (OSTI)

The convection occurring in the tropical depression that became Hurricane Ophelia (2005) was investigated just prior to tropical storm formation. Doppler radar showed a deep, wide, intense convective cell of a type that has been previously ...

Robert A. Houze Jr.; Wen-Chau Lee; Michael M. Bell

2009-09-01T23:59:59.000Z

285

Balanced Dynamics of Mesoscale Vortices Produced in Simulated Convective Systems  

Science Conference Proceedings (OSTI)

Long-lived, mesoscale convective systems are known to occasionally produce mesoscale convective vortices (MCVs) in the lower to middle troposphere with horizontal scales averaging 100–200 km. The formation of MCVs is investigated using fully ...

Christopher A. Davis; Morris L. Weisman

1994-07-01T23:59:59.000Z

286

Regulation of Moist Convection over the West Pacific Warm Pool  

Science Conference Proceedings (OSTI)

The mechanisms that regulate moist convection over the warm tropical oceans are not well understood. One school of thought holds that convection is caused by the convergence of moisture, which in turn is produced by an independent dynamical ...

David J. Raymond

1995-11-01T23:59:59.000Z

287

Resonant Response of Deep Convection to Surface Hot Spots  

Science Conference Proceedings (OSTI)

Observations show substantial variations of the intensity of tropical and/or summertime deep convection on land that are not explained by standard measures of convective instability. One feature that distinguishes land surfaces is their ...

F. J. Robinson; S. C. Sherwood; Y. Li

2008-01-01T23:59:59.000Z

288

Behavior of Turbulence Statistics in the Convective Boundary Layer  

Science Conference Proceedings (OSTI)

Velocity variances in the convective boundary layer are examined using data derived in PBL experiments over land (Minnesota) and ocean (the Coral Sea) supported by data from the Kansas study of the surface boundary layer. In the freely convective ...

B. B. Hicks

1985-06-01T23:59:59.000Z

289

Scalable adaptive mantle convection simulation on petascale supercomputers  

Science Conference Proceedings (OSTI)

Mantle convection is the principal control on the thermal and geological evolution of the Earth. Mantle convection modeling involves solution of the mass, momentum, and energy equations for a viscous, creeping, incompressible non-Newtonian fluid at high ...

Carsten Burstedde; Omar Ghattas; Michael Gurnis; Georg Stadler; Eh Tan; Tiankai Tu; Lucas C. Wilcox; Shijie Zhong

2008-11-01T23:59:59.000Z

290

Thermodynamic Properties of Mesoscale Convective Systems Observed during BAMEX  

Science Conference Proceedings (OSTI)

Dropsonde observations from the Bow Echo and Mesoscale Convective Vortex Experiment (BAMEX) are used to document the spatiotemporal variability of temperature, moisture, and wind within mesoscale convective systems (MCSs). Onion-type sounding ...

James Correia Jr.; Raymond W. Arritt

2008-11-01T23:59:59.000Z

291

Convectively Driven Turbulent Mixing in the Upper Ocean  

Science Conference Proceedings (OSTI)

Two experiments were performed to study the characteristics of turbulence in convective mixed layers in the upper Ocean. In the first, a diurnal convective mixed layer developed in the Bahamas under the influence of the cycle of daytime solar ...

T. J. Shay; M. C. Gregg

1986-11-01T23:59:59.000Z

292

Implicit Versus Explicit Convective Heating in Numerical Weather Prediction Models  

Science Conference Proceedings (OSTI)

The ability of several explicit formulations of convective heating to predict the precipitation associated with a mesoscale convective complex was compared to that of a cumulus parameterization on a ½ deg latitude-longitude mesh. In the explicit ...

John Molinari; Michael Dudek

1986-10-01T23:59:59.000Z

293

A Model to Determine Open or Closed Cellular Convection  

Science Conference Proceedings (OSTI)

A simple mechanism is proposed to help explain the observed presence in the atmosphere of open or closed cellular convection. If convection is produced by cooling concentrated near the top of the cloud layer, as in radiative cooling of stratus ...

H. Mark Helfand; Eugenia Kalnay

1983-03-01T23:59:59.000Z

294

Cloud-to-Ground Lightning Activity in Mesoscale Convective Complexes  

Science Conference Proceedings (OSTI)

A study of cloud-to-ground lightning activity attending an important subclass of mesoscale convective weather systems called the mesoscale convective complex shows that groun discharge flash rates in excess of 1000 h?1 can be sustained on average ...

S. J. Goodman; D. R. MacGorman

1986-12-01T23:59:59.000Z

295

Parameterized Updraft Mass Flux as a Predictor of Convective Intensity  

Science Conference Proceedings (OSTI)

Parameterized updraft mass flux, available as a unique predictive field from the Kain–Fritsch (KF) convective parameterization, is presented as a potentially valuable predictor of convective intensity. The KF scheme is described in some detail, ...

John S. Kain; Michael E. Baldwin; Steven J. Weiss

2003-02-01T23:59:59.000Z

296

Cycles and Propagation of Deep Convection over Equatorial Africa  

Science Conference Proceedings (OSTI)

Long-term statistics of organized convection are vital to improved understanding of the hydrologic cycle at various scales. Satellite observations are used to understand the timing, duration, and frequency of deep convection in equatorial Africa, ...

Arlene G. Laing; Richard E. Carbone; Vincenzo Levizzani

2011-09-01T23:59:59.000Z

297

Sensitivity of Monthly Convective Precipitation to Environmental Conditions  

Science Conference Proceedings (OSTI)

Identifying dynamical and physical mechanisms controlling variability of convective precipitation is critical for predicting intraseasonal and longer-term changes in warm-season precipitation and convectively driven large-scale circulations. On a ...

Boksoon Myoung; John W. Nielsen-Gammon

2010-01-01T23:59:59.000Z

298

Aircraft Investigation of Mesoscale Cellular Convection During AMTEX 75  

Science Conference Proceedings (OSTI)

The 1 s data set collected by the NCAR Electra research aircraft in the presence of closed mesoscale cellular convection (MCC) has been examined for the purpose of determining the convective wind field and horizontal profiles of temperature and ...

Jeffry Rothermel; Ernest M. Agee

1980-05-01T23:59:59.000Z

299

Nonlinear Effects on Convectively Forced Two-Dimensional Mesoscale Flows  

Science Conference Proceedings (OSTI)

One of the important problems in mesoscale atmospheric dynamics is how the atmosphere responds to convective heating or cooling. Here, the authors examine nonlinear effects on convectively forced mesoscale flows in the context of the nonlinear ...

Ji-Young Han; Jong-Jin Baik

2012-11-01T23:59:59.000Z

300

Physics of Greenhouse Effect and Convection in Warm Oceans  

Science Conference Proceedings (OSTI)

Sea surface temperature (SST) in roughly 50% of the tropical Pacific Ocean is warm enough (SST > 300 K) to permit deep convection. This paper examines the effects of deep convection on the climatological mean vertical distributions of water vapor ...

A. K. Inamdar; V. Ramanathan

1994-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "midlatitude continental convective" 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

A Convective Line with Leading Stratiform Precipitation from BAMEX  

Science Conference Proceedings (OSTI)

On 31 May 2003, a front-fed convective line with leading stratiform precipitation (FFLS) was observed during the Bow Echo and Mesoscale Convective Vortex Experiment (BAMEX). The high-resolution BAMEX measurements provided one of the first ...

Brandon A. Storm; Matthew D. Parker; David P. Jorgensen

2007-05-01T23:59:59.000Z

302

Subinertial Frequency Response of Wind-Driven Currents in the Mixed layer Measured by Drifting Buoys in the Midlatitude North Pacific  

Science Conference Proceedings (OSTI)

Previous analyses of satellite-tracked drifting buoy data (30 m drogue depth) and Fleet Numerical Ocean Center (FNOC) surface wind stress in the midlatitude North Pacific during autumn/winter have shown near-surface current vectors 25° to the ...

Gerard J. McNally; Douglas S. Luther; Warren B. White

1989-03-01T23:59:59.000Z

303

Comparison between Low-Flash and Non-Lightning-Producing Convective Areas within a Mature Mesoscale Convective System  

Science Conference Proceedings (OSTI)

Two small multicellular convective areas within a larger mesoscale convective system that occurred on 20 June 2004 were examined to assess vertical motion, radar reflectivity, and dual-polarimetric signatures between flash and non-flash-producing ...

Jennifer L. Palucki; Michael I. Biggerstaff; Donald R. MacGorman; Terry Schuur

2011-08-01T23:59:59.000Z

304

The Convective Instability Pathway to Warm Season Drought in Texas. Part II: Free-Tropospheric Modulation of Convective Inhibition  

Science Conference Proceedings (OSTI)

This study is concerned with the modulation by convective instability of summertime precipitation in Texas as a mechanism for maintaining or enhancing drought. The important role of convective inhibition (CIN), its dependence on the temperature ...

Boksoon Myoung; John W. Nielsen-Gammon

2010-09-01T23:59:59.000Z

305

Heat Flux Partitioning in Open-Ocean Convection  

Science Conference Proceedings (OSTI)

Cold air blowing out over a warm ocean leads to convection over an isolated region of the ocean basin. This phenomenon, known as open-ocean convection, is often simulated by convective forcing from a circular disk much smaller than the dimension ...

David Brickman

1995-11-01T23:59:59.000Z

306

Simulations of stellar convection with CO5BOLD  

Science Conference Proceedings (OSTI)

High-resolution images of the solar surface show a granulation pattern of hot rising and cooler downward-sinking material - the top of the deep-reaching solar convection zone. Convection plays a role for the thermal structure of the solar interior and ... Keywords: Numerical simulations, Radiation (magneto)hydrodynamics, Stellar surface convection

B. Freytag; M. Steffen; H. -G. Ludwig; S. Wedemeyer-Böhm; W. Schaffenberger; O. Steiner

2012-02-01T23:59:59.000Z

307

Coupling of Convective Momentum Transport with Convective Heating in Global Climate Simulations  

Science Conference Proceedings (OSTI)

The effects of convective momentum transport (CMT) on global climate simulations are examined in this study. Comparison between two sets of 20-yr (1979–98) integration using the NCAR Community Climate Model version 3 (CCM3) illustrates that the ...

Xiaoqing Wu; Liping Deng; Xiaoliang Song; Guang Jun Zhang

2007-04-01T23:59:59.000Z

308

Response of Tropical Deep Convection to Localized Heating Perturbations: Implications for Aerosol-Induced Convective Invigoration  

Science Conference Proceedings (OSTI)

A cloud-system-resolving model is used to investigate the effects of localized heating/cooling perturbations on tropical deep convection, in the context of the aerosol “invigoration effect.” This effect supposes that a reduction of droplet ...

Hugh Morrison; Wojciech W. Grabowski

2013-11-01T23:59:59.000Z

309

Unsteady, Turbulent Convection into a Rotating, Linearly Stratified Fluid: Modeling Deep Ocean Convection  

Science Conference Proceedings (OSTI)

A laboratory experiment has been constructed to Model the deep convective processes in a stratified ocean driven by the energetic cooling at the ocean surface. For convenience in the laboratory the authors have examined the analogous but inverted ...

M. J. Coates; G. N. Ivey; J. R. Taylor

1995-12-01T23:59:59.000Z

310

Precipitation and Kinematic Structure of an Oceanic Mesoscale Convective System. Part I: Convective Line Structure  

Science Conference Proceedings (OSTI)

The precipitation, thermodynamic, and kinematic structure of an oceanic mesoscale convective system is studied using airborne Doppler and in situ (flight-level) data collected by the NOAA P-3 aircraft. The system, a well-organized, stationary, ...

David P. Jorgensen; Margaret A. LeMone; Ben Jong-Dao Jou

1991-11-01T23:59:59.000Z

311

Aerosol Indirect Effects on Tropical Convection Characteristics under Conditions of Radiative–Convective Equilibrium  

Science Conference Proceedings (OSTI)

The impacts of enhanced aerosol concentrations such as those associated with dust intrusions on the trimodal distribution of tropical convection have been investigated through the use of large-domain (10 000 grid points), fine-resolution (1 km), ...

Susan C. van den Heever; Graeme L. Stephens; Norman B. Wood

2011-04-01T23:59:59.000Z

312

Convective Building of a Pycnocline: Laboratory Experiments  

Science Conference Proceedings (OSTI)

The convective building of a pycnocline is examined using a laboratory model forced by surface fluxes of saline water at one end and fresh water at the other. A deep recirculation evolves in the tank, which homogenizes the interior fluid by ...

David W. Pierce; Peter B. Rhines

1996-02-01T23:59:59.000Z

313

A Convective Cell in a Hurricane Rainband  

Science Conference Proceedings (OSTI)

On 10 October 1983 the two NOAA WP-3D aircraft completed a mission designed to provide airborne Doppler radar data for a convective cell embedded in a weak rainband on the trailing side of Hurricane Raymond. Comparisons of the wind field produced ...

G. M. Barnes; J. F. Gamache; M. A. LeMone; G. J. Stossmeister

1991-03-01T23:59:59.000Z

314

Transport Asymmetry in Skewed Convective Circulations  

Science Conference Proceedings (OSTI)

Two simple kinematical models are used to describe the asymmetry in bottom-up and top-down diffusion in the convective boundary layer. Both models resolve the mean circulation with narrow updrafts and wider downdrafts but differ in the treatment ...

Ulrich Schumann

1993-01-01T23:59:59.000Z

315

`Convective` flat plate collectors and their applications  

SciTech Connect

The `convective` flat plate collector is a particular two-way collector system with air in gravity flow as primary working fluid. Its thermal characteristics are described. Results of outdoor tests and thermal simulations are shown. Different applications of the system are presented: water heating, steam generation for medical sterilization, solar cooking and space heating. 10 refs., 16 figs., 6 tabs.

Grupp, M.; Bergler, H.; Bertrand, J.P. [Synopsis, Lodeve (France); Kromer, B. [Institut fuer Umweltphysik der Universtaet, Heidelberg (Germany); Cieslok, J. [INCO, Aachen (Germany)

1995-12-31T23:59:59.000Z

316

A Convective Transport Theory for Surface Fluxes  

Science Conference Proceedings (OSTI)

For a boundary layer in free convection where turbulent thermal structures communicate information between the surface and the interior of the mixed layer, it is hypothesized that the surface momentum flux can be parameterized by u*2 = bDwBMML, ...

Roland B. Stull

1994-01-01T23:59:59.000Z

317

A Simple Method for Measuring Deep Convection  

Science Conference Proceedings (OSTI)

The glass-pipe technology used for RAFOS floats is applied to the monitoring of convection in deep mixed layers. The velocity of a vertical current is estimated from the relationship between the drag force exerted on a float by the vertical ...

Edward J. Kearns; H. Thomas Rossby

1993-08-01T23:59:59.000Z

318

A Downscaled Wind Climatology on the Outer Continental Shelf  

Science Conference Proceedings (OSTI)

A 31-yr time series of boundary layer winds has been developed for a region on the outer continental shelf. This simulated time series was designed to be suitable to study the wind resources for a potential offshore wind farm. Reanalysis data were ...

Bryan K. Woods; Thomas Nehrkorn; John M. Henderson

2013-08-01T23:59:59.000Z

319

Generation of Topographic Waves over the Continental Margin  

Science Conference Proceedings (OSTI)

Numerical experiments were carried out to simulate the generation of topographic waves by a Gulf Stream ring over the continental margin in a stratified ocean on an f-plane. The study was aimed at understanding the combined effect of density ...

Ping-Tung Shaw; S. Divakar

1991-07-01T23:59:59.000Z

320

A 30-Year Wind Climatology on the Outer Continental Shelf  

Science Conference Proceedings (OSTI)

A 31-year time series of boundary layer winds has been developed for a region on the outer continental shelf. This simulated time series was designed to be suitable to study the wind resources for a potential offshore wind farm. Reanalysis data ...

Bryan K. Woods; Thomas Nehrkorn; John M. Henderson

Note: This page contains sample records for the topic "midlatitude continental convective" 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

THE FUTURE OF CONTINENTAL SCIENTIFIC DRILLING U.S. PERSPECTIVE  

E-Print Network (OSTI)

, so cooperation and coordination between the continental and marine drilling community is critical, and should be managed in coordination with technological, database and other support capabilities currently models of the dynamics of the solar system, produce insolation curves for any arbitrary time period, tune

Peterson, Blake R.

322

Ozone Destruction in Continental Stratus Clouds: An Aircraft Case Study  

Science Conference Proceedings (OSTI)

Apparent depletion of ozone in a cold (0°C), continental stratus cloud system was observed during in situ data collection on 30 April 1994 at the Department of Energy Clouds and Radiation Test Bed site in northern Oklahoma. Analyses of the ...

Zhien Wang; Kenneth Sassen

2000-06-01T23:59:59.000Z

323

Effects of Continental Slope on the Mean Shelf Circulation  

Science Conference Proceedings (OSTI)

Csanady's (1978) theory on the mean shelf circulation in a homogeneous ocean was re-examined by including effects of a continental slope. The results suggested that the mean southwestward flow on the Mid-Atlantic Blight is driven by an inflow ...

Dong-Ping Wang

1982-12-01T23:59:59.000Z

324

Comparison of the Synoptic Conditions in Midlatitudes Accompanying Cold Surges over Eastern Asia for the Months of December 1974 and 1978. Part I: Monthly Mean Fields and Individual Events  

Science Conference Proceedings (OSTI)

East Asian cold surges during two periods of contrasting intensity, December 1974 (strong) and December 1978 (weak), are studied. It is shown that the midlatitude mechanisms initiating cold surges during both months are quite similar in nature. ...

James S. Boyle

1986-05-01T23:59:59.000Z

325

Convective transport in laser target plasmas  

SciTech Connect

The role of guiding-center corrections in convective transport of electron energy is examined with a simple numerical model. At 10/sup 16/W cm/sup -2/ with a 60-..mu..m spot and a 10.6-..mu..m wavelength laser, the Righi-Leduc term is observed to have little effect on transport in a calculation with the thermal flux limited to the free-streaming value.

Brackbill, J.U.; Colombant, D.; Grandjouan, N.

1982-01-01T23:59:59.000Z

326

Convective heat transport in geothermal systems  

DOE Green Energy (OSTI)

Most geothermal systems under exploitation for direct use or electrical power production are of the hydrothermal type, where heat is transferred essentially by convection in the reservoir, conduction being secondary. In geothermal systems, buoyancy effects are generally important, but often the fluid and heat flow patterns are largely controlled by geologic features (e.g., faults, fractures, continuity of layers) and location of recharge and discharge zones. During exploitation, these flow patterns can drastically change in response to pressure and temperature declines, and changes in recharge/discharge patterns. Convective circulation models of several geothermal systems, before and after start of fluid production, are described, with emphasis on different characteristics of the systems and the effects of exploitation on their evolution. Convective heat transport in geothermal fields is discussed, taking into consideration (1) major geologic features; (2) temperature-dependent rock and fluid properties; (3) fracture- versus porous-medium characteristics; (4) single- versus two-phase reservoir systems; and (5) the presence of noncondensible gases.

Lippmann, M.J.; Bodvarsson, G.S.

1986-08-01T23:59:59.000Z

327

PROPAGATION OF GRAVITY WAVES IN A CONVECTIVE LAYER  

SciTech Connect

We perform numerical simulations of gravity mode propagation in a convective layer to investigate the observed association between small spatial scales and low frequencies in the photospheric velocity fields. According to the linear theory, when the fluid layer is convectively unstable, gravity modes are evanescent waves. However, in simple two-dimensional numerical settings, we find that when the equilibrium structure is modified by coherent large-scale convective motions, the waves injected at the bottom of the layer are no longer evanescent. In this situation, gravity waves can be detected at the surface of the layer. In our simplified model the injected wave's frequency remains unchanged, but its amplitude has a spatial modulation determined by the convective structure. This result may explain some analyses done with the proper orthogonal decomposition method of the solar surface velocity field even though solar convection is far more complex than the convection model considered here.

Onofri, M.; Vecchio, A.; Veltri, P. [Dipartimento di Fisica, Universita della Calabria, via P. Bucci, 87036 Rende (Italy); De Masi, G., E-mail: onofri@fis.unical.it [Consorzio RFX, Associazione EURATOM-ENEA sulla Fusione, 35127 Padova (Italy)

2012-02-10T23:59:59.000Z

328

Tracer Gas Transport under Mixed Convection Conditions in an Experimental  

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

Tracer Gas Transport under Mixed Convection Conditions in an Experimental Tracer Gas Transport under Mixed Convection Conditions in an Experimental Atrium: Comparison Between Experiments and CFD Predictions Title Tracer Gas Transport under Mixed Convection Conditions in an Experimental Atrium: Comparison Between Experiments and CFD Predictions Publication Type Journal Article Year of Publication 2006 Authors Jayaraman, Buvaneswari, Elizabeth U. Finlayson, Michael D. Sohn, Tracy L. Thatcher, Phillip N. Price, Emily E. Wood, Richard G. Sextro, and Ashok J. Gadgil Journal Atmospheric Environment Volume 40 Start Page Chapter Pagination 5236-5250 Keywords airflow and pollutant transport group, atria, indoor airflow and pollutant transport, indoor environment department, indoor pollutant dispersion, mixed convection, turbulence model

329

New Insights Into Deep Convective Core Vertical Velocities Using...  

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

Insights Into Deep Convective Core Vertical Velocities Using ARM UHF Wind Profilers For original submission and image(s), see ARM Research Highlights http:www.arm.govscience...

330

Comparison between experiments and CFD predictions of mixed convection...  

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

results from a computational fluid dynamics (CFD) simulation of airflow and pollutant dispersion under mixed-convection conditions with experimental data obtained in our 7m x...

331

Thermal Convection: Patterns, Evolution and Stability by M. Lappa  

E-Print Network (OSTI)

Review of the book "Thermal Convection: Patterns, Evolution and Stability" by M. Lappa. Invited by the journal Geophysical and Astrophysical Fluid Dynamics.

Simitev, R D

2010-01-01T23:59:59.000Z

332

Drift Natural Convection and Seepage at the Yucca Mountain Repository  

E-Print Network (OSTI)

multiphase mass and heat transfer processes[26, 33], in bothdrift environment heat transfer processes are a multifacetedof convective heat transfer processes, but how is it that we

Halecky, Nicholaus Eugene

2010-01-01T23:59:59.000Z

333

A Review of Convection Initiation and Motivation for IHOP_2002  

Science Conference Proceedings (OSTI)

The International H2O Project (IHOP_2002) included four complementary research components: quantitative precipitation forecasting, convection initiation, atmospheric boundary layer processes, and instrumentation. This special issue introductory ...

Tammy M. Weckwerth; David B. Parsons

2006-01-01T23:59:59.000Z

334

Diurnal Cycle of Convection at the ARM SGP Site: Role of Large-Scale Forcing, Surface Fluxes, and Convective Inhibition  

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

Diurnal Cycle of Convection at the ARM SGP Site: Diurnal Cycle of Convection at the ARM SGP Site: Role of Large-Scale Forcing, Surface Fluxes, and Convective Inhibition G. J. Zhang Center for Atmospheric Sciences Scripps Institution of Oceanography La Jolla, California Introduction Atmospheric convection undergoes strong diurnal variation over both land and oceans (Gray and Jacobson 1977; Dai 2001; Nesbitt and Zipser 2003). Because of the nature of the diurnal variation of solar radiation, the phasing of convection with solar radiation has a significant impact on the atmospheric radiation budget and cloud radiative forcing. A number of studies have investigated the possible mechanisms of the diurnal variation of convection (Gray and Jacobson 1977; Randall et al. 1991; Dai et al. 1999; Dai 2001). Yet, in regional and global climate models, the diurnal variation of

335

The Relation between Moist Convective Adjustment Schemes and the Mass-Flux Concept for Cumulus Parameterization  

Science Conference Proceedings (OSTI)

The problem of finding convective mass fluxes and convective condensation rates in moist convective adjustment schemes for cumulus parameterization in numerical weather prediction is addressed. Formal considerations reveal that, in general, it is ...

Peter Binder

1993-12-01T23:59:59.000Z

336

Analysis of Convectively Coupled Kelvin Waves in the Indian Ocean MJO  

Science Conference Proceedings (OSTI)

The active convective phase of the Madden–Julian oscillation (hereafter active MJO) comprises enhanced moist deep convection on its own temporal and spatial scales as well as increased variance in convection associated with higher-frequency ...

Paul E. Roundy

2008-04-01T23:59:59.000Z

337

Prediction of convective morphology in near-cloud permitting WRF model simulations  

Science Conference Proceedings (OSTI)

The Weather Research and Forecasting (WRF) model’s ability to forecast convective morphological evolution is examined for 37 convective systems. The simulations used Thompson microphysics with 3-km horizontal grid spacing. Ten convective mode ...

Darren V. Snively; William A. Gallus; Jr.

338

The Initiation and Evolution of Multiple Modes of Convection within a Meso-Alpha-Scale Region  

Science Conference Proceedings (OSTI)

On 30 March 2006, a convective episode occurred featuring isolated supercells, a mesoscale convective system (MCS) with parallel stratiform (PS) precipitation, and an MCS with leading stratiform (LS) precipitation. These three distinct convective ...

Adam J. French; Matthew D. Parker

2008-12-01T23:59:59.000Z

339

Structure of a Midtropospheric Vortex Induced by a Mesoscale Convective System  

Science Conference Proceedings (OSTI)

On 9 June 1988 a mesoscale (200-km diameter) convectively generated vortex (MCV) passed through the Colorado wind-profiling network. The generating convective system, which was too small to meet Maddox’s mesoscale convective complex criteria, ...

Diana L. Bartels; John M. Brown; Edward I. Tollerud

1997-02-01T23:59:59.000Z

340

Characterization of Momentum Transport Associated with Organized Moist Convection and Gravity Waves  

Science Conference Proceedings (OSTI)

Tropical convection is inherently multiscalar, involving complex fields of clouds and various regimes of convective organization ranging from small disorganized cumulus up to large organized convective clusters. In addition to being a crucial ...

Todd P. Lane; Mitchell W. Moncrieff

2010-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "midlatitude continental convective" 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

Orogenic Convection in Subtropical South America as Seen by the TRMM Satellite  

Science Conference Proceedings (OSTI)

Extreme orogenic convective storms in southeastern South America are divided into three categories: storms with deep convective cores, storms with wide convective cores, and storms containing broad stratiform regions. Data from the Tropical ...

Kristen L. Rasmussen; Robert A. Houze Jr.

2011-08-01T23:59:59.000Z

342

Sensitivities of a Squall Line over Central Europe in a Convective-Scale Ensemble  

Science Conference Proceedings (OSTI)

Convective-scale ensemble simulations with perturbed initial and lateral boundary conditions are performed to investigate the mechanisms and sensitivities of a central European convection event from the Convective and Orographically Induced ...

K. E. Hanley; D. J. Kirshbaum; N. M. Roberts; G. Leoncini

2013-01-01T23:59:59.000Z

343

Practical and Intrinsic Predictability of Severe and Convective Weather at the Mesoscales  

Science Conference Proceedings (OSTI)

This study explores both the practical and intrinsic predictability of severe convective weather at the mesoscales using convection-permitting ensemble simulations of a squall line and bow echo event during the Bow Echo and Mesoscale Convective ...

Christopher Melhauser; Fuqing Zhang

2012-11-01T23:59:59.000Z

344

Dynamics of Orographically Triggered Banded Convection in Sheared Moist Orographic Flows  

Science Conference Proceedings (OSTI)

Shallow orographic convection embedded in an unstable cap cloud can organize into convective bands. Previous research has highlighted the important role of small-amplitude topographic variations in triggering and organizing banded convection. ...

Oliver Fuhrer; Christoph Schär

2007-10-01T23:59:59.000Z

345

Convection in a porous medium and mimetic scheme in polar coordinates  

Science Conference Proceedings (OSTI)

Analytical investigation of natural convection of the incompressible fluid in the porous media based on the Darcy hypothesis (Lapwood convection) gives intriguing branching off of one-parameter family of convective patterns. This scenario may be suppressed ...

Bülent Karasözen; Anastasia Trofimova; Vyacheslav Tsybulin

2011-09-01T23:59:59.000Z

346

Cloud-Resolving Simulations of Mesoscale Vortex Intensification and Its Effect on a Serial Mesoscale Convective System  

Science Conference Proceedings (OSTI)

The authors performed numerical simulations of the 27–28 May 1998 mesoscale convective vortex (MCV) and mesoscale convective system (MCS) to understand how the MCV modulated the convection, and how the convection intensified the vortex. The fifth-...

Christopher A. Davis; Stanley B. Trier

2002-12-01T23:59:59.000Z

347

Convection with Rotation in a Neutral Ocean: A Study of Open-Ocean Deep Convection  

Science Conference Proceedings (OSTI)

The intensity and scale of the geostrophically adjusted end state of the convective overturning of a homogeneous rotating ocean of depth H at a latitude where the Coriolis parameter is f, induced by surface buoyancy loss of magnitude B0, are ...

Helen Jones; John Marshall

1993-06-01T23:59:59.000Z

348

Radiative-Convective Equilibrium with Explicit Two-Dimensional Moist Convection  

Science Conference Proceedings (OSTI)

Radiative-convective statistical equilibria are obtained using a two-dimensional model in which radiative transfer is interactive with the predicted moisture and cloud fields. The domain is periodic in x, with a width of 640 km, and extends from ...

Isaac M. Held; Richard S. Hemler; V. Ramaswamy

1993-12-01T23:59:59.000Z

349

Tropical Wave Instabilities: Convective Interaction with Dynamics Using the Emanuel Convective Parameterization  

Science Conference Proceedings (OSTI)

Wave-CISK and evaporation-wind feedback modes, also known as WISHE (wind-induced surface heat exchange) modes, are investigated using a two-dimensional (x?p), hydrostatic, nonrotational model linearized about a basic state in radiative-convective ...

Randy G. Brown; Christopher S. Bretherton

1995-01-01T23:59:59.000Z

350

Natural convection airflow measurement and theory  

DOE Green Energy (OSTI)

Natural convection is a major mechanism for heat distribution in many passive solar buildings, especially those with sunspaces. To better understand this mechanism, observations of air velocities and temperatures have been made in 13 different houses that encompass a wide variety of one- and two-story geometries. This paper extends previous reports. Results from one house are described in detail, and some generalizations are drawn from the large additional mass of data taken. A simple mathematical model is presented that describes the general nature of airflow and energy flow through an aperture.

Balcomb, J.D.; Jones, G.F.; Yamaguchi, Kenjiro

1984-01-01T23:59:59.000Z

351

East Asian Summer monsoon precipitation systems: rainfall characteristics, storm morphologies and convective properties.  

E-Print Network (OSTI)

??This study attempts to characterize the particular convection type, namely storm morphologies, convective properties, and microphysics, of different weather regimes within the East Asian Summer… (more)

Xu, Weixin

2011-01-01T23:59:59.000Z

352

Parameterization of Convective Precipitation in Mesoscale Numerical Models: A Critical Review  

Science Conference Proceedings (OSTI)

Current approaches for incorporating cumulus convection into mesoscale numerical models are divided into three groups. The traditional approach utilizes cumulus parameterization at convectively unstable points and explicit (nonparameterized) ...

John Molinari; Michael Dudek

1992-02-01T23:59:59.000Z

353

Sensitivity of Tropical Convection to Land Surface Processes  

Science Conference Proceedings (OSTI)

This paper studies the sensitivity of large-scale tropical convection to land surface changes in the general circulation model of the LMD. Ale method of analysis is based on a conceptual model of the energetics of convection applied every day of ...

J. Polcher

1995-09-01T23:59:59.000Z

354

Rapidly Rotating Suns and Active Nests of Convection  

E-Print Network (OSTI)

In the solar convection zone, rotation couples with intensely turbulent convection to drive a strong differential rotation and achieve complex magnetic dynamo action. Our sun must have rotated more rapidly in its past, as is suggested by observations of many rapidly rotating young solar-type stars. Here we explore the effects of more rapid rotation on the global-scale patterns of convection in such stars and the flows of differential rotation and meridional circulation which are self-consistently established. The convection in these systems is richly time dependent and in our most rapidly rotating suns a striking pattern of localized convection emerges. Convection near the equator in these systems is dominated by one or two nests in longitude of locally enhanced convection, with quiescent streaming flow in between at the highest rotation rates. These active nests of convection maintain a strong differential rotation despite their small size. The structure of differential rotation is similar in all of our more rapidly rotating suns, with fast equators and slower poles. We find that the total shear in differential rotation Delta Omega grows with more rapid rotation while the relative shear Delta Omega/Omega_0 decreases. In contrast, at more rapid rotation the meridional circulations decrease in energy and peak velocities and break into multiple cells of circulation in both radius and latitude.

Benjamin P. Brown; Matthew K. Browning; Allan Sacha Brun; Mark S. Miesch; Juri Toomre

2008-08-12T23:59:59.000Z

355

Structure and evolution of a convective band MCS  

E-Print Network (OSTI)

The structure and evolution of the synoptic, mesoscale, and lightning characteristics of the 5 May 1993 non-squall line Mesoscale Convective System has been described. This storm was a long-lived Mesoscale Convective Complex. Its formation was influenced by strong low-level warm advection, weak vorticity advection, and weak vertical. wind shear. Its dissipation occurred as the storm encountered a more stable air mass which may have been influenced by storm induced subsidence. The cyclonic mesoscale circulation of the Mesoscale Convective Complex apparently aided in the formation of new lines of convection behind the primary convective line of the system. This process was repeated twice in the storm life cycle and led to multiple bands of convection. Indeed, this storm had three main lines: the leading line, the trailing one, and the small line near the center of the vortex. As the new lines formed, the vertical transport of momentum disrupted the symmetry of the mesovortex. However, as the line propagated eastward away from the vortex, the symmetric cyclonic circulation re-established itself. This Mesoscale Convective Complex produced flash rates in excess of 1000 h-I for twenty-four consecutive hours. The percentage of positive polarity flashes was higher during the formative and dissipating stages of the storm system. Positive flashes were also enhanced during mergers between convective bands. The flash locations during the mature stage of this storm suggest a bipolar pattern.

Valdes-Manzanilla, Arturo

1995-01-01T23:59:59.000Z

356

Gravity Waves in Shear and Implications for Organized Convection  

Science Conference Proceedings (OSTI)

It is known that gravity waves in the troposphere, which are often excited by preexisting convection, can favor or suppress the formation of new convection. Here it is shown that in the presence of wind shear or barotropic wind, the gravity waves ...

Samuel N. Stechmann; Andrew J. Majda

2009-09-01T23:59:59.000Z

357

Gravity Waves in Shear and Implications for Organized Convection  

E-Print Network (OSTI)

Gravity Waves in Shear and Implications for Organized Convection Samuel N. Stechmann Department, Los Angeles, CA 90095­1555. E-mail: stechmann@math.ucla.edu #12;ABSTRACT It is known that gravity, the gravity waves can create a more favorable environment on one side of preexisting convection than the other

Stechmann, Samuel N.

358

Boundary layer solutions for natural convection in porous media  

DOE Green Energy (OSTI)

An approximate solution is developed for natural convection in porous media resulting from localized heat sources. The method is applicable for moderate levels of convection. Results of the method compare well with those of other calculational methods and with experimental data. The solution for a spherical source can be used as an indirect method for the determination of permeability in some cases.

Hardee, H.C.

1976-05-01T23:59:59.000Z

359

Solar Convection Simulations using a B-spline method  

E-Print Network (OSTI)

This report outlines the development of a B-spline--spectral numerical code for the simulation of convection flows. It allows changing the spatial resolution in all three coordinates as a function of depth, which is especially advantageous for simulations of solar convection.

Hartlep, Thomas

2008-01-01T23:59:59.000Z

360

Solar Convection Simulations using a B-spline method  

E-Print Network (OSTI)

This report outlines the development of a B-spline--spectral numerical code for the simulation of convection flows. It allows changing the spatial resolution in all three coordinates as a function of depth, which is especially advantageous for simulations of solar convection.

Thomas Hartlep; Nagi N. Mansour

2008-05-05T23:59:59.000Z

Note: This page contains sample records for the topic "midlatitude continental convective" 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

Environmental Distinctions between Cellular and Slabular Convective Lines  

Science Conference Proceedings (OSTI)

The organizational mode of quasi-linear convective systems often falls within a spectrum of modes described by a line of discrete cells on one end (“cellular”) and an unbroken two-dimensional swath of ascent on the other (“slabular”). Convective ...

Richard P. James; J. Michael Fritsch; Paul M. Markowski

2005-09-01T23:59:59.000Z

362

Measurement of Simulated Convective Temperature Distribution Near Ancient Wall Paintings  

Science Conference Proceedings (OSTI)

This study presents a method for measuring the temperature distribution in a confined volume of water used to simulate heat convection in the air. The water was seeded with thermo sensitive crystals as an indicator for the temperature. A 1:10 scale model ... Keywords: air modeling in water, natural convection, thermo-sensitive liquid crystals

V. S. Fonov; C. F. Joeckel; I. Grant

2001-04-01T23:59:59.000Z

363

Climatic regimes of tropical convection and rainfall  

SciTech Connect

Annual distribution and phase propagation of tropical convection are delineated using harmonic and amplitude-phase characteristics analysis of climatological pentad mean outgoing longwave radiation and monthly frequencies of highly reflective cloud. An annual eastward propagation of peak rainy season along the equator from the central Indian Ocean (60[degrees]E) to Arafura Sea (130[degrees]E) is revealed. This indicates a transition from the withdrawal of the Indian summer monsoon to the onset of the Australian summer monsoon. Significant bimodal variations are found around major summer monsoon regions. These variations originate from the interference of two adjacent regimes. The convergence zones over the eastern North Pacific, the South Pacific, and the southwest Indian Ocean are identified as a marine monsoon regime that is characterized by a unimodal variation with a concentrated summer rainfall associated with the development of surface westerlies equatorward of a monsoon trough. Conversely, the central North Pacific and North Atlantic convergence zones between persistent northeast and southeast trades are classified as trade-wind convergence zones; which differ from the marine monsoon regime by their persistent rainy season and characteristic bimodal variation with peak rainy seasons occurring in late spring and fall. The roles of the annual march of sea surface temperature in the phase propagation and formation of various climatic regimes of tropical convection are also discussed. 34 refs., 8 figs., 1 tab.

Wang, Bin (Univ. of Hawaii, Honolulu, HI (United States))

1994-07-01T23:59:59.000Z

364

A MOLTEN SALT NATURAL CONVECTION REACTOR SYSTEM  

SciTech Connect

Fuel-salt volumes external to the core of a molten-salt reactor are calculated for a system in which the fuel salt circulates through the core and primary exchanger by free convection. In the calculation of these volumes, the exchanger heights above the core top range from 5 to 20 ft. Coolants considered for the primary exchanger are a second molten salt and helium. External fuel holdup is found to be the same with either coolant. Two sets of terminal temperatures are selected for the helium. The first combination permits steam generation at 850 psia, 900 deg F. The second set is selected for a closed gas turbine cycle with an 1100 deg F turbine inlet temperature. Specific power (thermal kw/kg 235) is found to be about 900 Mv/kg, based on initial, clean conditions and a 60 Mw (thermal) output. A specific power of 1275 kw/kg is estimated for a forced convection system of the same rating. (auth)

Romie, F.E.; Kinyon, B.W.

1958-02-01T23:59:59.000Z

365

Continental U.S. State Wind Resource Potential Tables (RDF Transformat...  

Open Energy Info (EERE)

Continental U.S. State Wind Resource Potential Tables (RDF Transformation) Submitted by Woodjr on Fri, 02042011 - 14:19 A linked data (RDF) transformation of the...

366

Limiting Factors for Convective Cloud Top Height in the Tropics  

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

Limiting Factors for Convective Cloud Top Limiting Factors for Convective Cloud Top Height in the Tropics M. P. Jensen and A. D. Del Genio National Aeronautics and Space Administration Goddard Institute for Space Studies Columbia University New York, New York Introduction Populations of tropical convective clouds are mainly comprised of three types: shallow trade cumulus, mid-level cumulus congestus and deep convective clouds (Johnson et al. 1999). Each of these cloud types has different impacts on the local radiation and water budgets. For climate model applications it is therefore important to understand the factors which determine the type of convective cloud that will occur. In this study, we concentrate on describing the factors that limit the cloud-top heights of mid-

367

ARM - Field Campaign - Year of Tropical Convection (YOTC)  

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

govCampaignsYear of Tropical Convection (YOTC) govCampaignsYear of Tropical Convection (YOTC) Campaign Links Year of Tropical Convection Website Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Year of Tropical Convection (YOTC) 2008.05.01 - 2010.04.30 Lead Scientist : Sally McFarlane Description Example of a sonde profile available from the ARM Archive The realistic representation of tropical convection in global atmospheric models is a long-standing challenge for weather and global climate models. The lack of fundamental knowledge in this area causes difficulties in modeling and predicting prominent phenomena of the tropical atmosphere such as the inter-tropical convergence zone (ITCZ), El-Nino/Southern Oscillation (ENSO), monsoons, the Madden-Julian Oscillation (MJO), tropical cyclones,

368

Effects of Varying the Shape of the Convective Heating Profile on Convectively Coupled Gravity Waves and Moisture Modes  

Science Conference Proceedings (OSTI)

The analytical model of convectively coupled gravity waves and moisture modes of Raymond and Fuchs is extended to the case of top-heavy and bottom-heavy convective heating profiles. Top-heavy heating profiles favor gravity waves, while bottom-...

Željka Fuchs; Saska Gjorgjievska; David J. Raymond

2012-08-01T23:59:59.000Z

369

Comparison of the Diurnal Precipitation Cycle in Convection-Resolving and Non-Convection-Resolving Mesoscale Models  

Science Conference Proceedings (OSTI)

The diurnal cycles of rainfall in 5-km grid-spacing convection-resolving and 22-km grid-spacing non-convection-resolving configurations of the Weather Research and Forecasting (WRF) model are compared to see if significant improvements can be ...

Adam J. Clark; William A. Gallus Jr.; Tsing-Chang Chen

2007-10-01T23:59:59.000Z

370

Long-Term Simulations of Thermally Driven Flows and Orographic Convection at Convection-Parameterizing and Cloud-Resolving Resolutions  

Science Conference Proceedings (OSTI)

The purpose of this paper is to validate the representation of topographic flows and moist convection over the European Alps in a convection-parameterizing simulation (CPM; ?x = 6.6 km) and two cloud-resolving simulations (CRM; ?x = 1.1 and 2.2 km)...

Wolfgang Langhans; Juerg Schmidli; Oliver Fuhrer; Susanne Bieri; Christoph Schär

2013-06-01T23:59:59.000Z

371

FLUX EMERGENCE IN A MAGNETIZED CONVECTION ZONE  

Science Conference Proceedings (OSTI)

We study the influence of a dynamo magnetic field on the buoyant rise and emergence of twisted magnetic flux ropes and their influence on the global external magnetic field. We ran three-dimensional MHD numerical simulations using the ASH code (anelastic spherical harmonics) and analyzed the dynamical evolution of such buoyant flux ropes from the bottom of the convection zone until the post-emergence phases. The global nature of this model can only very crudely and inaccurately represent the local dynamics of the buoyant rise of the implanted magnetic structure, but nonetheless allows us to study the influence of global effects, such as self-consistently generated differential rotation and meridional circulation, and of Coriolis forces. Although motivated by the solar context, this model cannot be thought of as a realistic model of the rise of magnetic structures and their emergence in the Sun, where the local dynamics are completely different. The properties of initial phases of the buoyant rise are determined essentially by the flux-rope's properties and the convective flows and consequently are in good agreement with previous studies. However, the effects of the interaction of the background dynamo field become increasingly strong as the flux ropes evolve. During the buoyant rise across the convection zone, the flux-rope's magnetic field strength scales as B{proportional_to}{rho}{sup {alpha}}, with {alpha} {approx}current density is observed to precede flux emergence at all longitudes. The geometry, latitude, and relative orientation of the flux ropes with respect to the background magnetic field influences the resulting rise speeds, zonal flow amplitudes (which develop within the flux ropes), and the corresponding surface signatures. This influences the morphology, duration and amplitude of the surface shearing, and the Poynting flux associated with magnetic flux-rope emergence. The emerged magnetic flux influences the system's global polarity, leading in some cases to a polarity reversal while inhibiting the background dynamo from doing so in others. The emerged magnetic flux is slowly advected poleward while being diffused and assimilated by the background dynamo field.

Pinto, R. F.; Brun, A. S., E-mail: rui.pinto@cea.fr [Laboratoire AIM Paris-Saclay, CEA/Irfu Universite Paris-Diderot CNRS/INSU, F-91191 Gif-sur-Yvette (France)

2013-07-20T23:59:59.000Z

372

Reflections on dissipation associated with thermal convection  

E-Print Network (OSTI)

Buoyancy-driven convection is modelled using the Navier-Stokes and entropy equations. It is first shown that the coefficient of heat capacity at constant pressure, c_p, must in general depend explicitly on pressure (i.e. is not a function of temperature alone) in order to resolve a dissipation inconsistency. It is shown that energy dissipation in a statistically steady state is the time-averaged volume integral of - (D P)/(D t) and not that of - alpha T (D P)/(D t). Secondly, in the framework of the anelastic equations derived with respect to the adiabatic reference state, we obtain a condition when the anelastic liquid approximation can be made, gamma -1 << 1, independent of the dissipation number.

Thierry Alboussiere; Yanick Ricard

2012-10-19T23:59:59.000Z

373

Inside the supernova a powerful convective engine  

E-Print Network (OSTI)

We present an extensive study of the inception of supernova explosions by following the evolution of the cores of two massive stars (15 Msun and 25 Msun) in two dimensions. Our calculations begin at the onset of core collapse and stop several 100 ms after the bounce, at which time successful explosions of the appropriate magnitude have been obtained. (...) Guided by our numerical results, we have developed a paradigm for the supernova explosion mechanism. We view a supernova as an open cycle thermodynamic engine in which a reservoir of low-entropy matter (the envelope) is thermally coupled and physically connected to a hot bath (the protoneutron star) by a neutrino flux, and by hydrodynamic instabilities. (...) In essence, a Carnot cycle is established in which convection allows out-of-equilibrium heat transfer mediated by neutrinos to drive low entropy matter to higher entropy and therefore extracts mechanical energy from the heat generated by gravitational collapse. We argue that supernova explosions are ne...

Herant, M; Hix, W R; Fryer, C F; Colgate, S A; Marc Herant; Willy Benz; Chris F Fryer; Stirling Colgate

1994-01-01T23:59:59.000Z

374

Inside the Supernova: A Powerful Convective Engine  

E-Print Network (OSTI)

Condensed Abstract: We present an extensive study of the inception of supernova explosions by following the evolution of the cores of two massive stars (15 Msun and 25 Msun) in two dimensions. Our calculations begin at the onset of core collapse and stop several 100 ms after the bounce, at which time successful explosions of the appropriate magnitude have been obtained. (...) Guided by our numerical results, we have developed a paradigm for the supernova explosion mechanism. We view a supernova as an open cycle thermodynamic engine in which a reservoir of low-entropy matter (the envelope) is thermally coupled and physically connected to a hot bath (the protoneutron star) by a neutrino flux, and by hydrodynamic instabilities. (...) In essence, a Carnot cycle is established in which convection allows out-of-equilibrium heat transfer mediated by neutrinos to drive low entropy matter to higher entropy and therefore extracts mechanical energy from the heat generated by gravitational collapse. We argue that supernova explosions are nearly guaranteed and self-regulated by the high efficiency of the thermodynamic engine. (...) Convection continues to accumulate energy exterior to the neutron star until a successful explosion has occurred. At this time, the envelope is expelled and therefore uncoupled from the heat source (the neutron star) and the energy input ceases. This paradigm does not invoke new or modified physics over previous treatments, but relies on compellingly straightforward thermodynamic arguments. It provides a robust and self-regulated explosion mechanism to power supernovae which is effective under a wide range of physical parameters.

Marc Herant; Willy Benz; W. Raphael Hix; Chris F. Fryer; Stirling Colgate

1994-04-12T23:59:59.000Z

375

Extreme lithium isotopic fractionation during continental weathering revealed in saprolites from South Carolina  

E-Print Network (OSTI)

Extreme lithium isotopic fractionation during continental weathering revealed in saprolites from in revised form 6 July 2004 Abstract The lithium concentration and isotopic composition of two saprolites the behavior of lithium isotopes during continental weathering. Both saprolites show a general trend

Rudnick, Roberta L.

376

The Breaking and Scattering of the Internal Tide on a Continental Slope  

Science Conference Proceedings (OSTI)

A strong internal tide is generated in the Luzon Strait that radiates westward to impact the continental shelf of the South China Sea. Mooring data in 1500-m depth on the continental slope show a fortnightly averaged incoming tidal flux of 12 kW m?...

Jody M. Klymak; Matthew H. Alford; Robert Pinkel; Ren-Chieh Lien; Yung Jang Yang; Tswen-Yung Tang

2011-05-01T23:59:59.000Z

377

Double Diffusive Natural Convection in a Nuclear Waste Repository  

Science Conference Proceedings (OSTI)

In this study, we conduct a two-dimensional numerical analysis of double diffusive natural convection in an emplacement drift for a nuclear waste repository. In-drift heat and moisture transport is driven by combined thermal- and compositional-induced buoyancy forces. Numerical results demonstrate buoyancy-driven convective flow patterns and configurations during both repository heat-up and cool-down phases. It is also shown that boundary conditions, particularly on the drip-shield surface, have strong impacts on the in-drift convective flow and transport.

Y. Hao; J. Nitao; T.A. Buscheck; Y. Sun

2006-03-28T23:59:59.000Z

378

Continental Divide El Coop Inc | Open Energy Information  

Open Energy Info (EERE)

Divide El Coop Inc Divide El Coop Inc Jump to: navigation, search Name Continental Divide El Coop Inc Place New Mexico Utility Id 4265 Utility Location Yes Ownership C NERC Location WECC NERC WECC Yes Activity Transmission Yes Activity Distribution Yes References EIA Form EIA-861 Final Data File for 2010 - File1_a[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Utility Rate Schedules Grid-background.png COMMERCIAL RATE - GENERAL SERVICE Commercial IRRIGATION SERVICE ( UTILITY OWNED) Commercial IRRIGATION SERVICE (CONSUMER OWNED) Commercial LARGE POWER SERVICE (CONSUMER OWNED) Commercial LARGE POWER SERVICE (UTILITY OWNED) Commercial Large Industrial Transmission Service Industrial

379

Potential alternative energy technologies on the Outer Continental Shelf.  

SciTech Connect

This technical memorandum (TM) describes the technology requirements for three alternative energy technologies for which pilot and/or commercial projects on the U.S. Outer Continental Shelf (OCS) are likely to be proposed within the next five to seven years. For each of the alternative technologies--wind, wave, and ocean current--the TM first presents an overview. After each technology-specific overview, it describes the technology requirements for four development phases: site monitoring and testing, construction, operation, and decommissioning. For each phase, the report covers the following topics (where data are available): facility description, electricity generated, ocean area (surface and bottom) occupied, resource requirements, emissions and noise sources, hazardous materials stored or used, transportation requirements, and accident potential. Where appropriate, the TM distinguishes between pilot-scale (or demonstration-scale) facilities and commercial-scale facilities.

Elcock, D.; Environmental Assessment

2007-04-20T23:59:59.000Z

380

Organic geochemistry of continental margin and deep ocean sediments  

Science Conference Proceedings (OSTI)

The objective of this research continues to be the understanding of the complex processes of fossil fuel formation and migration. DOE funded research to date has focused on case histories'' of down-hole well profiles of light hydrocarbons, pyrograms, pyrolysis-GC and -GCMS parameters, and biomarker data from wells in the Louisiana and Texas Gulf Coasts the Alaskan North Slope. In the case of the Alaskan North Slope, geological data and one-dimensional maturation modeling have been integrated in order to better constrain possible source rocks, timing, and migration routes for oil and gas generation and expulsion processes.This period, biomarker analyses and organic petrographic analyses were completed for the Ikpikpuk well. In the case of the Gulf Coast, we have obtained a one-dimensional maturation model of the Cost B-1 well in E. Cameron field of the Louisiana Gulf Coast. The completed E. Cameron data set adds to the enigma of the Gulf Coast oils found on the continental shelf of Louisiana. If significant quantities of the oil are coming from relatively organic lean Tertiary rocks, then non-conventional'' expulsion and migration mechanisms, such as gas dissolved in oil must be invoked to explain the Gulf Coast oils reservoired on the Louisiana continental shelf. We are designing and starting to assemble a hydrous pyrolysis apparatus to follow, the laboratory, rates of generation and expulsion of sediment gases. Initiation of some new research to examine {delta}{sup 13}C of individual compounds from pyrolysis is also described. We are beginning to examine both the laboratory and field data from the Gulf Coast in the context of a Global Basin Research Network (GBRN). The purpose is to better understand subsurface fluid flow processes over geologic time in sedimentary basins and their relation to resource accumulation (i.e., petroleum and metal ores). 58 refs.

Whelan, J.K.; Hunt, J.M.; Eglinton, T.; Dickinson, P.; Johnson, C.; Buxton, L.; Tarafa, M.E.

1990-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "midlatitude continental convective" 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

Simulated Convective Lines with Leading Precipitation. Part I: Governing Dynamics  

Science Conference Proceedings (OSTI)

This article, the first of two describing a study in which the authors used idealized numerical simulations to investigate convective lines with leading precipitation, addresses the dynamics governing the systems' structures and individual air ...

Matthew D. Parker; Richard H. Johnson

2004-07-01T23:59:59.000Z

382

The Onset of Convection in the Madden–Julian Oscillation  

Science Conference Proceedings (OSTI)

An observational study of the onset of convection in the Madden–Julian oscillation (MJO) was performed. Composites of radiosonde data from the Comprehensive Aerological Reference Data Set were constructed for an ensemble of tropical stations ...

Susan R. Kemball-Cook; Bryan C. Weare

2001-03-01T23:59:59.000Z

383

Convective Boundary Layers Driven by Nonstationary Surface Heat Fluxes  

Science Conference Proceedings (OSTI)

In this study the response of dry convective boundary layers to nonstationary surface heat fluxes is systematically investigated. This is relevant not only during sunset and sunrise but also, for example, when clouds modulate incoming solar ...

Robert van Driel; Harm J. J. Jonker

2011-04-01T23:59:59.000Z

384

On the Generation of Convectively Driven Mesohighs Aloft  

Science Conference Proceedings (OSTI)

In an attempt to determine the relative contribution of the direct incorporation of cold air (detrainment from overshooting convective cloud tops) to the production of mesohighs in the vicinity of the tropopause, two numerical simulations were ...

J. M. Fritsch; J. M. Brown

1982-11-01T23:59:59.000Z

385

Mesoscale Convective Complexes in the Western Pacific Region  

Science Conference Proceedings (OSTI)

A climatological study of mesoscale convective complexes (MCCs) during 1983–1985 over the western Pacific region (WPR), using full-disc, enhanced infrared satellite imagery from the Japanese Geostationary Meteorological Satellite is presented.

David Miller; J. M. Fritsch

1991-12-01T23:59:59.000Z

386

Mesoscale Convective Complexes over the Indian Monsoon Region  

Science Conference Proceedings (OSTI)

Full disk infrared satellite imagery from the Indian National Satellite System (INSAT) geostationary meteorological satellite was examined to determine if mesoscale convective complexes (MCCs) frequent the Indian subcontinent (ISC) region. Using ...

Arlenf G. Laing; J. Michael Fritsch

1993-05-01T23:59:59.000Z

387

Resolution Requirements for the Simulation of Deep Moist Convection  

Science Conference Proceedings (OSTI)

The spatial resolution appropriate for the simulation of deep moist convection is addressed from a turbulence perspective. To provide a clear theoretical framework for the problem, techniques for simulating turbulent flows are reviewed, and the ...

George H. Bryan; John C. Wyngaard; J. Michael Fritsch

2003-10-01T23:59:59.000Z

388

Impact of Stochastic Convection on the Ensemble Transform  

Science Conference Proceedings (OSTI)

The impact of stochastic convection on ensembles produced using the ensemble transform (ET) initial perturbation scheme is examined. This note compares the behavior of ensemble forecasts based only on initial ET perturbations with the behavior of ...

Carolyn A. Reynolds; Joao Teixeira; Justin G. McLay

2008-11-01T23:59:59.000Z

389

Tropical Convection and Precipitation Regimes in the Western United States  

Science Conference Proceedings (OSTI)

The authors have documented the relationship between tropical convection and precipitation regimes in the western United States. Circulation patterns associated with precipitation regimes are described and physical mechanisms are proposed. ...

Kingtse C. Mo; R. W. Higgins

1998-09-01T23:59:59.000Z

390

On the Relationship between Tropical Convection and Sea Surface Temperature  

Science Conference Proceedings (OSTI)

Tropical observations show convective activity increasing sharply above sea surface temperatures (SSTs) of around 26°C and then decreasing as the SST exceeds 30°C, with maximum observed SSTs of around 32°C.Although some aspects of this ...

Adrian M. Tompkins

2001-03-01T23:59:59.000Z

391

Precipitation Efficiency of Warm-Season Midwestern Mesoscale Convective Systems  

Science Conference Proceedings (OSTI)

The precipitation efficiencies for mesoscale convective systems (MCS) over the central United States are calculated. During July–September 2000 and June–September 2001, 24 MCS for which sufficient data were available occurred over or near ...

Patrick Market; Stacy Allen; Roderick Scofield; Robert Kuligowski; Arnold Gruber

2003-12-01T23:59:59.000Z

392

Convective Storm Initiation in a Moist Tropical Environment  

Science Conference Proceedings (OSTI)

Radar and satellite data from the Tropical Rainfall Measuring Mission–Large-Scale Biosphere–Atmosphere (TRMM–LBA) project have been examined to determine causes for convective storm initiation in the southwest Amazon region. The locations and ...

Maria Andrea Lima; James W. Wilson

2008-06-01T23:59:59.000Z

393

The Environments of Significant Convective Events in the Western Mediterranean  

Science Conference Proceedings (OSTI)

The environmental characteristics associated with 313 significant convective events in the western Mediterranean are investigated using radiosonde ascents made in Mallorca (Spain). The events are separated into five groups, based on the observed ...

Elisa Tudurí; Clemente Ramis

1997-06-01T23:59:59.000Z

394

Frontogenesis in the Presence of Small Stability to Slantwise Convection  

Science Conference Proceedings (OSTI)

It is often observed that, despite the existence of near neutrality to slantwise convection, rainbands and snowbands can persist for long periods with narrow intense updrafts producing large quantities of precipitation in many cases. This is ...

A. J. Thorpe; K. A. Emanuel

1985-09-01T23:59:59.000Z

395

Survey and evaluation of techniques to augment convective heat transfer  

E-Print Network (OSTI)

This report presents a survey and evaluation of the numerous techniques which have been shown to augment convective heat transfer. These techniques are: surface promoters, including roughness and treatment; displaced ...

Bergles A. E.

1965-01-01T23:59:59.000Z

396

Multiple Convection Patterns and Thermohaline Flow in an Idealized OGCM  

Science Conference Proceedings (OSTI)

This paper investigates how multiple steady states arise in an ocean general circulation model, caused by the fact that many different convection patterns can be stable under the same surface boundary conditions. Two alternative boundary ...

Stefan Rahmstorf

1995-12-01T23:59:59.000Z

397

Factors for the Simulation of Convectively Coupled Kelvin Waves  

Science Conference Proceedings (OSTI)

This study investigates the major factors for the realistic simulation of convectively coupled Kelvin waves (CCKWs) using the National Centers for Environmental Prediction (NCEP) Climate Forecast System (CFS) models. CFS simulations employing ...

Kyong-Hwan Seo; Jin-Ho Choi; Sang-Dae Han

2012-05-01T23:59:59.000Z

398

The Tropical Convective Spectrum. Part I: Archetypal Vertical Structures  

Science Conference Proceedings (OSTI)

A taxonomy of tropical convective and stratiform vertical structures is constructed through cluster analysis of 3 yr of Tropical Rainfall Measuring Mission (TRMM) “warm-season” (surface temperature greater than 10°C) precipitation radar (PR) ...

Dennis J. Boccippio; Walter A. Petersen; Daniel J. Cecil

2005-07-01T23:59:59.000Z

399

Convective Precursors and Predictability in the Tropical Western Pacific  

Science Conference Proceedings (OSTI)

Conditions leading to convective outbreak in the Tropics are investigated by multivariate analysis of sounding and satellite data from the tropical western Pacific area. Circumstances that make the prediction problem difficult are discussed and ...

Steven C. Sherwood

1999-12-01T23:59:59.000Z

400

An Observational Study of Derecho-Producing Convective Systems  

Science Conference Proceedings (OSTI)

This study identifies the common large-scale environments associated with the development of derecho- producing convective systems (DCSs) from a large number of events. Patterns are identified using statistical clustering of the 500-mb ...

Michael C. Coniglio; David J. Stensrud; Michael B. Richman

2004-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "midlatitude continental convective" 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

A Large Eddy Simulation Intercomparison Study of Shallow Cumulus Convection  

Science Conference Proceedings (OSTI)

This paper reports an intercomparison study on undisturbed trade wind cumulus convection under steady-state conditions as observed during the Barbados Oceanographic and Meteorological Experiment (BOMEX) with 10 large eddy simulation (LES) models. ...

A. Pier Siebesma; Christopher S. Bretherton; Andrew Brown; Andreas Chlond; Joan Cuxart; Peter G. Duynkerke; Hongli Jiang; Marat Khairoutdinov; David Lewellen; Chin-Hoh Moeng; Enrique Sanchez; Bjorn Stevens; David E. Stevens

2003-05-01T23:59:59.000Z

402

Analysis of Convection and Its Association with African Easterly Waves  

Science Conference Proceedings (OSTI)

The association between convection and African easterly wave (AEW) activity over tropical Africa and the tropical Atlantic during the boreal summer is examined using satellite brightness temperature (TB) and ECMWF reanalysis datasets. Spectral ...

Ademe Mekonnen; Chris D. Thorncroft; Anantha R. Aiyyer

2006-10-01T23:59:59.000Z

403

Convection-Evaporation Feedback in the Equatorial pacific  

Science Conference Proceedings (OSTI)

The coupling between convection and surface evaporation is investigated to assess the importance of evaporative cooling in regulating the tropical sea surface temperature. It is found that such a coupling is scale dependent. On timescales of ...

Guang Jun Zhang; V. Ramanathan; Michael J. McPhaden

1995-12-01T23:59:59.000Z

404

Eddy Modulation of Air–Sea Interaction and Convection  

Science Conference Proceedings (OSTI)

Eddy modulation of the air–sea interaction and convection that occurs in the process of mode water formation is analyzed in simulations of a baroclinically unstable wind- and buoyancy-driven jet. The watermass transformation analysis of Walin is ...

Ivana Cerove?ki; John Marshall

2008-01-01T23:59:59.000Z

405

A Linearized Convective Overturning Model for Prediction of Thunderstorm Movement  

Science Conference Proceedings (OSTI)

A linearized model of convective overturning in shear for prediction of storm propagation is presented. Good correspondence between the model and observation is found for a number of case studies of real storms. Supercell storms, however, are an ...

Adrian Marroquin; David J. Raymond

1982-01-01T23:59:59.000Z

406

Observational Analysis of the Predictability of Mesoscale Convective Systems  

Science Conference Proceedings (OSTI)

Mesoscale convective systems (MCSs) have a large influence on the weather over the central United States during the warm season by generating essential rainfall and severe weather. To gain insight into the predictability of these systems, the ...

Israel L. Jirak; William R. Cotton

2007-08-01T23:59:59.000Z

407

Equatorial Atmospheric Waves and Their Association to Convection  

Science Conference Proceedings (OSTI)

Equatorial wave systems and their relationships with convective activity are analyzed in the western and central Pacific regions during the Coupled Ocean–Atmosphere Response Experiment (COARE) intensive observation periods. The study uses ...

P. Pires; J-L. Redelsperger; J-P. Lafore

1997-06-01T23:59:59.000Z

408

A Stereo Photogrammetric Technique Applied to Orographic Convection  

Science Conference Proceedings (OSTI)

This paper describes a technique for photogrammetric analysis of stereo pairs of images that is applied to the study of orographic convection. The technique is designed for use with digital images and assumes detailed knowledge of the camera ...

Joseph A. Zehnder; Jiuxiang Hu; Anshuman Razdan

2007-06-01T23:59:59.000Z

409

Toward Convective Boundary Layer Parameterization: A Scalar Transport Module  

Science Conference Proceedings (OSTI)

Recent results from large-eddy simulations indicate that the eddy diffusivity for scalar diffusion through the top of a convective boundary layer is different from that for diffusion through the bottom. From this, one can show that the eddy ...

John C. Wyngaard

1984-06-01T23:59:59.000Z

410

An Observational Analysis of a Developing Mesoscale Convective Complex  

Science Conference Proceedings (OSTI)

Dual-Doppler radar, surface mesonet, satellite, and upper-air sounding data from the 1985 Preliminary Regional Experiment for STORM-Central field experiment are used to analyze the early growth stages of a mesoscale convective complex (MCC) that ...

Jason E. Nachamkin; Ray L. McAnelly; William R. Cotton

1994-06-01T23:59:59.000Z

411

Transitions in Shallow Convection: An Explanation for Lateral Cell Expansion  

Science Conference Proceedings (OSTI)

A generalized seven-coefficient model of two-dimensional Rayleigh-Bénard convection is presented. The model simulates successfully one means by which lateral cell expansion can occur as the value of the imposed vertical temperature difference is ...

Hai-Ru Chang; Hampton N. Shirer

1984-08-01T23:59:59.000Z

412

Positive Cloud-to-Ground Lightning in Mesoscale Convective Systems  

Science Conference Proceedings (OSTI)

We have examined the characteristics of positive cloud-to-ground lightning flashes in Mesoscale Convective Systems observed during the Oklahoma-Kansas PRE-STORM project in 1985. Lightning frequencies and patterns of ground strike locations are ...

Steven A. Rutledge; Chungu Lu; Donald R. MacGorman

1990-09-01T23:59:59.000Z

413

Physical Characterization of Tropical Oceanic Convection Observed in KWAJEX  

Science Conference Proceedings (OSTI)

The Tropical Rainfall Measuring Mission (TRMM) Kwajalein Experiment (KWAJEX) was designed to obtain an empirical physical characterization of precipitating convective clouds over the tropical ocean. Coordinated datasets were collected by three ...

Sandra E. Yuter; Robert A. Houze Jr.; Eric A. Smith; Thomas T. Wilheit; Edward Zipser

2005-04-01T23:59:59.000Z

414

Equatorial Wave Activity Derived from Fluctuations in Observed Convection  

Science Conference Proceedings (OSTI)

The spectrum of equatorial wave activity propagating vertically into the stratosphere is calculated from high-resolution imagery of the global convective pattern. Synoptic Global Cloud Imagery (GCI), constructed from six satellites simultaneously ...

John W. Bergman; Murry L. Salby

1994-12-01T23:59:59.000Z

415

The Influence of Helicity on Numerically Simulated Convective Storms  

Science Conference Proceedings (OSTI)

A three-dimensional numerical cloud model is used to investigate the influence of storm-relative environmental helicity (SREH) on convective storm structure and evolution, with a particular emphasis on the identification of ambient shear profiles ...

Kelvin K. Droegemeier; Steven M. Lazarus; Robert Davies-Jones

1993-07-01T23:59:59.000Z

416

Further Aspects of Transitions in Two-Dimensional Thermal Convection  

Science Conference Proceedings (OSTI)

In this paper we present the results of numerical investigation of a two-dimensional nonlinear set of Boussinesq equations governing Bénard–Rayleigh convection using spectral representation in the horizontal direction and finite-difference ...

Marina Zivkovi?; Ernest M. Agee

1988-12-01T23:59:59.000Z

417

Observations from Space and Thermal Convection: A Historical Perspective  

Science Conference Proceedings (OSTI)

An abbreviated historical account of the evolution of the satellite meteorology program is presented. Emphasis is placed on the importance of the satellite and its space platform for observing and studying atmospheric convection. Particular ...

Ernest M. Agee

1984-09-01T23:59:59.000Z

418

Sampling Characteristics from Isobaric Floats in a Convective Eddy Field  

Science Conference Proceedings (OSTI)

During the recent Labrador Sea Deep Convection Experiment, numerous isobaric floats were deployed. Interpretation of the quasi-Lagrangian measurements from these floats requires an understanding of any biases that may be introduced by the ...

Sonya Legg; James C. McWilliams

2002-02-01T23:59:59.000Z

419

Temperature and Salinity Variability in Heterogeneous Oceanic Convection  

Science Conference Proceedings (OSTI)

In regions of active oceanic convection, such as the Labrador Sea, small- and mesoscale spatial variability is observed in the temperature and salinity fields (T and S). Often T and S structures are “density-compensated,” with the density ...

Sonya Legg; James C. McWilliams

2000-06-01T23:59:59.000Z

420

Wavelet-Compressed Representation of Deep Moist Convection  

Science Conference Proceedings (OSTI)

The capacity of wavelets to effectively represent atmospheric processes under compression is tested by a dataset generated by a cloud-resolving model simulation of deep convective events observed during the Tropical Ocean Global Atmosphere ...

Jun-Ichi Yano; Peter Bechtold; Jean-Luc Redelsperger; Francoise Guichard

2004-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "midlatitude continental convective" 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

Effects of Rotation on Convective Plumes from Line Segment Sources  

Science Conference Proceedings (OSTI)

Effects of rotation on finite-length line plumes are studied with a three-dimensional nonhydrostatic numerical model. Geophysical convection with this source geometry occurs, for example, as the result of fissure releases of hot hydrothermal ...

J. W. Lavelle; D. C. Smith IV

1996-06-01T23:59:59.000Z

422

VARIATION OF STELLAR ENVELOPE CONVECTION AND OVERSHOOT WITH METALLICITY  

SciTech Connect

We examine how metallicity affects convection and overshoot in the superadiabatic layer of main sequence stars. We present results from a grid of three-dimensional radiation hydrodynamic simulations with four metallicities (Z = 0.040, 0.020, 0.010, 0.001), and spanning a range in effective temperature (4950 < T{sub eff} < 6230). We show that changing the metallicity alters properties of the convective gas dynamics, and the structure of the superadiabatic layer and atmosphere. Our grid of simulations shows that the amount of superadiabaticity, which tracks the transition from efficient to inefficient convection, is sensitive to changes in metallicity. We find that increasing the metallicity forces the location of the transition region to lower densities and pressures, and results in larger mean and turbulent velocities throughout the superadiabatic region. We also quantify the degree of convective overshoot in the atmosphere, and show that it increases with metallicity as well.

Tanner, Joel D.; Basu, Sarbani; Demarque, Pierre [Department of Astronomy, Yale University, P.O. Box 208101, New Haven, CT 06520-8101 (United States)] [Department of Astronomy, Yale University, P.O. Box 208101, New Haven, CT 06520-8101 (United States)

2013-04-10T23:59:59.000Z

423

Stratospheric Gravity Waves Generated by Multiscale Tropical Convection  

Science Conference Proceedings (OSTI)

The generation of gravity waves by multiscale cloud systems evolving in an initially motionless and thermodynamically uniform environment is explored using a two-dimensional cloud-system-resolving model. The simulated convection has similar depth ...

Todd P. Lane; Mitchell W. Moncrieff

2008-08-01T23:59:59.000Z

424

Organizational Modes of Mesoscale Convective Systems over Central East China  

Science Conference Proceedings (OSTI)

Composite reflectivity Doppler radar data from June to September of 2007--2010 were used to classify mesoscale convective systems (MCSs) over Central East China into seven morphologies. The morphologies included one nonlinear mode (NL) and six ...

Linlin Zheng; Jianhua Sun; Xiaoling Zhang; Changhai Liu

425

A Climatology of Fatal Convective Wind Events by Storm Type  

Science Conference Proceedings (OSTI)

There are still hundreds of casualties produced by thunderstorm hazards each year in the United States despite the many recent advances in prediction and mitigation of the effects of convective storms. Of the four most common thunderstorm hazards ...

Joseph M. Schoen; Walker S. Ashley

2011-02-01T23:59:59.000Z

426

Extreme Helicity and Intense Convective Towers in Hurricane Bonnie  

Science Conference Proceedings (OSTI)

Helicity was calculated in Hurricane Bonnie (1998) using tropospheric-deep dropsonde soundings from the NASA Convection and Moisture Experiment. Large helicity existed downshear of the storm center with respect to the ambient vertical wind shear. ...

John Molinari; David Vollaro

2008-11-01T23:59:59.000Z

427

Influence of Bulk Convection on Freckle Formation in Castings  

Science Conference Proceedings (OSTI)

compartments, a hot zone and a cold zone as shown in Figure l(a) below. A baffle is used to .... that the bulk convection cell will not distort the flow at the inlet.

428

Representing Convective Organization in Prediction Models by a Hybrid Strategy  

Science Conference Proceedings (OSTI)

The mesoscale organization of precipitating convection is highly relevant to next-generation global numerical weather prediction models, which will have an intermediate horizontal resolution (grid spacing about 10 km). A primary issue is how to ...

Mitchell W. Moncrieff; Changhai Liu

2006-12-01T23:59:59.000Z

429

A Stochastic Parameterization for Deep Convection Based on Equilibrium Statistics  

Science Conference Proceedings (OSTI)

A stochastic parameterization scheme for deep convection is described, suitable for use in both climate and NWP models. Theoretical arguments and the results of cloud-resolving models are discussed in order to motivate the form of the scheme. In ...

R. S. Plant; G. C. Craig

2008-01-01T23:59:59.000Z

430

The Kain–Fritsch Convective Parameterization: An Update  

Science Conference Proceedings (OSTI)

Numerous modifications to the Kain–Fritsch convective parameterization have been implemented over the last decade. These modifications are described, and the motivating factors for the changes are discussed. Most changes were inspired by feedback ...

John S. Kain

2004-01-01T23:59:59.000Z

431

Another Look at the Thermodynamic Equation For Deep Convection  

Science Conference Proceedings (OSTI)

The study considers deep moist convection involving only a liquid-vapor phase change. An alternative form of the classical thermodynamic equation for reversible saturated flow is derived. Four approximate forms of this equation are obtained and ...

Frank B. Lipps; Richard S. Hemler

1980-01-01T23:59:59.000Z

432

Analytical Parameterizations of Diffusion: The Convective Boundary Layer  

Science Conference Proceedings (OSTI)

A brief review is made of data bases which have been used for developing diffusion parameterizations for the convective boundary layer (CBL). A variety of parameterizations for lateral and vertical dispersion, ?y and ?z, are surveyed; some of ...

Gary A. Briggs

1985-11-01T23:59:59.000Z

433

The “Footprint” under a Decaying Tropical Mesoscale Convective System  

Science Conference Proceedings (OSTI)

On 10 February 1993, during the Tropical Ocean Global Atmosphere Coupled Ocean–Atmosphere Response Experiment, the two NOAA WP-3Ds and the NCAR Electra flew under the anvil region of a decaying mesoscale convective system (MCS). Satellite and ...

Mark F. Geldmeier; Gary M. Barnes

1997-11-01T23:59:59.000Z

434

Diabatic Divergence Profiles in Western Pacific Mesoscale Convective Systems  

Science Conference Proceedings (OSTI)

Heating in the atmosphere can be expressed as diabatic divergence ?d, which is nearly equal to the actual horizontal divergence ? in tropical convection. High-quality ? profile measurements from airborne Doppler radar “purls” in ten mesoscale ...

Brian E. Mapes; Robert A. Houze Jr.

1995-05-01T23:59:59.000Z

435

Satellite and Radar Survey of Mesoscale Convective System Development  

Science Conference Proceedings (OSTI)

An investigation of several hundred mesoscale convective systems (MCSs) during the warm seasons (April–August) of 1996–98 is presented. Circular and elongated MCSs on both the large and small scales were classified and analyzed in this study ...

Israel L. Jirak; William R. Cotton; Ray L. McAnelly

2003-10-01T23:59:59.000Z

436

Wintertime Convection in a Gulf stream Warm Core Ring  

Science Conference Proceedings (OSTI)

Wintertime convection creates deep mixed layers which determine the water mass characteristics and potential vorticity for waters in the main pycnocline of the world ocean. Diabatic cooling is most intense in the Northern Hemisphere near the ...

Terrence M. Joyce; Marvel C. Stalcup

1985-08-01T23:59:59.000Z

437

Observations of Vertical Wind Shear Heterogeneity in Convective Boundary Layers  

Science Conference Proceedings (OSTI)

Dual-Doppler wind syntheses from mobile radar observations obtained during the International H2O Project document some of the spatial variability of vertical wind profiles in convective boundary layers. Much of the variability of popular ...

Paul Markowski; Yvette Richardson

2007-03-01T23:59:59.000Z

438

An Investigation of Turbulence Generation Mechanisms above Deep Convection  

Science Conference Proceedings (OSTI)

An investigation of the generation of turbulence above deep convection is presented. This investigation is motivated by an encounter between a commercial passenger aircraft and severe turbulence above a developing thunderstorm near Dickinson, ...

Todd P. Lane; Robert D. Sharman; Terry L. Clark; Hsiao-Ming Hsu

2003-05-01T23:59:59.000Z

439

Dynamic Radiative–Convective Equilibria Using GCM Column Physics  

Science Conference Proceedings (OSTI)

The behavior of a GCM column physics package in a nonrotating, doubly periodic, homogeneous setting with prescribed SSTs is examined. This radiative–convective framework is proposed as a useful tool for studying some of the interactions between ...

Isaac M. Held; Ming Zhao; Bruce Wyman

2007-01-01T23:59:59.000Z

440

Numerical Modeling of Gravity Wave Generation by Deep Tropical Convection  

Science Conference Proceedings (OSTI)

Although convective clouds are known to generate internal gravity waves, the mechanisms responsible are not well understood. The present study seeks to clarify the dynamics of wave generation using a high-resolution numerical model of deep ...

Todd P. Lane; Michael J. Reeder; Terry L. Clark

2001-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "midlatitude continental convective" 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

RESEARCH CAMPAIGN: The Convective and Orographically Induced Precipitation Study  

Science Conference Proceedings (OSTI)

The international field campaign called the Convective and Orographically-induced Precipitation Study (COPS) took place from June to August 2007 in southwestern Germany/eastern France. The overarching goal of COPS is to advance the quality of ...

Volker Wulfmeyer; Andreas Behrendt; Hans-Stefan Bauer; Christoph Kottmeier; Ulrich Corsmeier; Alan Blyth; George Craig; Ulrich Schumann; Martin Hagen; Susanne Crewell; Paolo Di Girolamo; Cyrille Flamant; Mark Miller; Andrea Montani; Stephen Mobbs; Evelyne Richard; Mathias W. Rotach; Marco Arpagaus; Herman Russchenberg; Peter Schlüssel; Marianne König; Volker Gärtner; Reinhold Steinacker; Manfred Dorninger; David D. Turner; Tammy Weckwerth; Andreas Hense; Clemens Simmer

2008-10-01T23:59:59.000Z

442

Evaluation of Parametric Assumptions for Shallow Cumulus Convection  

Science Conference Proceedings (OSTI)

A large-eddy simulation (LES) model has been utilized to study nonprecipitating Shallow Convective clouds such as observed during the undisturbed BOMEX period in the trade wind areas. By choosing a realistic large-scale forcing the authors have ...

A. P. Siebesma; J. W. M. Cuijpers

1995-03-01T23:59:59.000Z

443

Fluctuations in an Equilibrium Convective Ensemble. Part I: Theoretical Formulation  

Science Conference Proceedings (OSTI)

To provide a theoretical basis for stochastic parameterization of cumulus convection, the equilibrium fluctuations of a field of cumulus clouds under homogeneous large-scale forcing are derived statistically, using the Gibbs canonical ensemble ...

George C. Craig; Brenda G. Cohen

2006-08-01T23:59:59.000Z

444

Equatorial Convectively Coupled Waves in a Simple Multicloud Model  

Science Conference Proceedings (OSTI)

Linear stability results for the multicloud model recently developed by the authors on an equatorial beta plane are presented here. The linearized equations, about a realistic radiative–convective equilibrium (RCE) are projected in the meridional ...

Boualem Khouider; Andrew J. Majda

2008-11-01T23:59:59.000Z

445

Lidar Observations of Banded Convection during BLX83  

Science Conference Proceedings (OSTI)

Lidar observations of clear-air convection during the 1983 Boundary Layer Experiment (BLX83) reveal the presence of elongated, parallel regions of updrafts marked by enhanced aerosol backscattering. These linear (banded) aerosol structures were ...

R. A. Ferrare; J. L. Schols; E. W. Eloranta; R. Coulter

1991-03-01T23:59:59.000Z

446

Forecasting the Maintenance of Quasi-Linear Mesoscale Convective Systems  

Science Conference Proceedings (OSTI)

The problem of forecasting the maintenance of mesoscale convective systems (MCSs) is investigated through an examination of observed proximity soundings. Furthermore, environmental variables that are statistically different between mature and ...

Michael C. Coniglio; Harold E. Brooks; Steven J. Weiss; Stephen F. Corfidi

2007-06-01T23:59:59.000Z

447

Spectral Characteristics of the Convective Boundary Layer Over Uneven Terrain  

Science Conference Proceedings (OSTI)

The paper describes a convective boundary layer experiment conducted in April 1978 at the Boulder Atmospheric Observatory, and examines the spectral behavior of wind velocity and temperature from the Observatory's 300 m tower, from aircraft ...

J. C. Kaimal; R. A. Eversole; D. H. Lenschow; B. B. Stankov; P. H. Kahn; J. A. Businger

1982-05-01T23:59:59.000Z

448

The AROME-France Convective-Scale Operational Model  

Science Conference Proceedings (OSTI)

After six years of scientific, technical developments and meteorological validation, the Application of Research to Operations at Mesoscale (AROME-France) convective-scale model became operational at Météo-France at the end of 2008. This paper ...

Y. Seity; P. Brousseau; S. Malardel; G. Hello; P. Bénard; F. Bouttier; C. Lac; V. Masson

2011-03-01T23:59:59.000Z

449

Observed Evolution of Tropical Deep Convective Events and Their Environment  

Science Conference Proceedings (OSTI)

Using a compositing technique, the temporal progression of tropical convective systems and the mean atmospheric state in their vicinity is constructed from a time series of geostationary satellite and operational rawinsonde data. The technique ...

Steven C. Sherwood; Ralph Wahrlich

1999-08-01T23:59:59.000Z

450

Convective Episodes in the East-Central United States  

Science Conference Proceedings (OSTI)

Nine years of composited radar data are investigated to assess the presence of organized convective episodes in the east-central United States. In the eastern United States, the afternoon maximum in thunderstorms is ubiquitous over land. However, ...

Matthew D. Parker; David A. Ahijevych

2007-11-01T23:59:59.000Z

451

Meso- and Submesoscale Structure of a Convecting Field  

Science Conference Proceedings (OSTI)

Intensive data collection in the region of the Labrador Sea northwest of former Ocean Weather Station Bravo during the winter of 1998 allowed examination of the meso- and submesoscale structure during active convection. Data used include ...

Elizabeth L. Steffen; Eric A. D'Asaro

2004-01-01T23:59:59.000Z

452

Circulations between Mesoscale Convective Systems along a Cold Front  

Science Conference Proceedings (OSTI)

A frontal squall line that passed over the central United States on 14–15 June 1985 consisted of several primary mesoscale convective systems (MCSs) with a prominent gap (several hundred kilometers wide) between two of them over central Kansas ...

Richard H. Johnson; Barbara D. Miner; Paul E. Ciesielski

1995-03-01T23:59:59.000Z

453

Deep Convective System Evolution over Africa and the Tropical Atlantic  

Science Conference Proceedings (OSTI)

In the tropical African and neighboring Atlantic region there is a strong contrast in the properties of deep convection between land and ocean. Here, satellite radar observations are used to produce a composite picture of the life cycle of ...

Joanna M. Futyan; Anthony D. Del Genio

2007-10-01T23:59:59.000Z

454

Synoptic Wave Perturbations and Convective Systems over Equatorial Africa  

Science Conference Proceedings (OSTI)

Spectral analysis of the outgoing longwave radiation (OLR) time series over equatorial Africa reveals large oscillations of the convection with periods of between 3 and 6 days. In March and April, when the intertropical convergence zone (ITCZ) ...

Hanh Nguyen; Jean-Philippe Duvel

2008-12-01T23:59:59.000Z

455

Synoptic Mapping of Convective Structure from Undersampled Satellite Observations  

Science Conference Proceedings (OSTI)

Climate properties regulated by convection, such as water vapor, cloud cover, and related distributions, are undersampled in asynoptic data from an individual orbiting platform, which must therefore be restricted to time-mean distributions. A ...

Murry Salby; Fabrizio Sassi

2001-05-01T23:59:59.000Z

456

Sensitivity of Boundary-layer and Deep Convective Cloud Simulations...  

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

convective clouds using a cloud resolving model (CRM). A CRM usually uses a vertical grid spacing less than 100 m to simulate boundary layer clouds such as shallow cumuli and...

457

Transient Environmental Sensitivities of Explicitly Simulated Tropical Convection  

Science Conference Proceedings (OSTI)

A three-dimensional cloud-resolving model, maintained in a statistically steady convecting state by tropics-like forcing, is subjected to sudden (10 min) stimuli consisting of horizontally homogeneous temperature and/or moisture sources with ...

Stefan N. Tulich; Brian E. Mapes

2010-04-01T23:59:59.000Z

458

Two-Zone Convective Scaling of Diffusion in Complex Terrain  

Science Conference Proceedings (OSTI)

A “two-zone” convective scaling equation is developed that allows for a step change in scaling parameters. The results of the Lompoc Valley Diffusion Experiment, conducted at coastal site in California under variable cloud cover, are compared to ...

C. E. Skupniewicz

1994-05-01T23:59:59.000Z

459

A Stochastic Model for the Transition to Strong Convection  

Science Conference Proceedings (OSTI)

A simple stochastic model is designed and analyzed in order to further understand the transition to strong convection. The transition has been characterized recently in observational data by an array of statistical measures, including (i) a sharp ...

Samuel N. Stechmann; J. David Neelin

2011-12-01T23:59:59.000Z

460

Gravity Waves and Convection in Colorado during July 1983  

Science Conference Proceedings (OSTI)

In order to gain insight into the complex dynamics of a convective system interacting with a gravity wave train, we have carried out an experiment in northeast Colorado during July and August, 1983, utilizing data from several program areas in ...

F. Einaudi; W. L. Clark; J. L. Green; T. E. VanZandt; D. Fua

1987-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "midlatitude continental convective" 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

Structure of Large-Scale Convective Anomalies over Tropical Oceans  

Science Conference Proceedings (OSTI)

Geographical variations in the variance and cross-correlation of monthly mean sea surface temperature (SST), outgoing longwave radiation (OLR, a proxy for deep convection and vertical motion), and convergence of winds at the surface and at 850 mb ...

David S. Gutzler; Tamara M. Wood

1990-04-01T23:59:59.000Z

462

Overview of the Convection and Moisture Experiment (CAMEX)  

Science Conference Proceedings (OSTI)

This paper presents an overview of the Convection and Moisture Experiment (CAMEX), including the field operations, aircraft platforms and missions, instrumentation, and data acquired during 1998 and 2001 field campaigns. A total of eight tropical ...

Ramesh Kakar; Michael Goodman; Robbie Hood; Anthony Guillory

2006-01-01T23:59:59.000Z

463

Organizational Modes of Mesoscale Convective Systems over Central East China  

Science Conference Proceedings (OSTI)

Composite reflectivity Doppler radar data from June to September of 2007–2010 were used to classify mesoscale convective systems (MCSs) over central east China into seven morphologies. The morphologies included one nonlinear mode (NL) and six ...

Linlin Zheng; Jianhua Sun; Xiaoling Zhang; Changhai Liu

2013-10-01T23:59:59.000Z

464

Large-Eddy Simulation of the Convective Atmospheric Boundary Layer  

Science Conference Proceedings (OSTI)

Large-eddy simulations of a free convective atmospheric boundary layer with an overlying capping inversion are considered. Attention is given to the dependence of the results upon the various factors influencing the simulation: the subgrid model, ...

P. J. Mason

1989-06-01T23:59:59.000Z

465

Impact of Stochastic Physics in a Convection-Permitting Ensemble  

Science Conference Proceedings (OSTI)

A stochastic physics scheme is tested in the Application of Research to Operations at Mesoscale (AROME) short-range convection-permitting ensemble prediction system. It is an adaptation of ECMWF’s stochastic perturbation of physics tendencies (...

François Bouttier; Benoît Vié; Olivier Nuissier; Laure Raynaud

2012-11-01T23:59:59.000Z

466

Climatology of Tropical Intraseasonal Convective Anomalies: 1979–2002  

Science Conference Proceedings (OSTI)

Tropical intraseasonal convective anomalies (TICA) have a central role in subseasonal changes in the coupled ocean–atmosphere system, but the climatology of TICA events has not been properly documented. This study exploits 24 years of outgoing ...

Charles Jones; Leila M. V. Carvalho; R. Wayne Higgins; Duane E. Waliser; J-K. E. Schemm

2004-02-01T23:59:59.000Z

467

Circulation Anomalies Associated with Tropical Convection during Northern Winter  

Science Conference Proceedings (OSTI)

Lagged cross correlations between outgoing longwave radiation (OLR) and National Meteorological Center global analyses are utilized to isolate the preferred upper-level and surface circulation anomalies associated with tropical convection during ...

George N. Kiladis; Klaus M. Weickmann

1992-09-01T23:59:59.000Z

468

A Forced Gravity Wave Model of Serf-Organizing Convection  

Science Conference Proceedings (OSTI)

A two-dimensional, hydrostatic, nonrotating numerical model with a cumulus paramelerizafion is developed to study the early stages of mesozcale convective systems. Amplifying, forced gravity waves occur when peneirative downdrafts are present. ...

David J. Raymond

1987-12-01T23:59:59.000Z

469

Upscale Effects of Deep Convection during the North American Monsoon  

Science Conference Proceedings (OSTI)

The ability of deep monsoon convection to influence the larger-scale circulation over North America is investigated for a 6-day long case study during the 2006 North American monsoon season. Results from Rossby wave ray tracing and numerical ...

David J. Stensrud

470

Processes of Hydrometeor Development in Oklahoma Convective Clouds  

Science Conference Proceedings (OSTI)

This study employs in situ measurements to examine cloud conditions in which hydrometeors develop in mature Oklahoma convective clouds and to develop hypotheses as to how they formed. The measurements were made from penetrations on six days using ...

Andrew J. Heymsfield; Mark R. Hjelmfelt

1984-10-01T23:59:59.000Z

471

The Role of Convective Instability in an Oklahoma Squall Line  

Science Conference Proceedings (OSTI)

Previous investigations of the 8 June 1966 National Severe Storms Laboratory case show that mesoscale lift from an “inland sea breeze” due to a newly formed temperature gradient preceded convection. Using additional surface data, this case was ...

Frank P. Colby Jr.

1980-09-01T23:59:59.000Z

472

Airborne Doppler Lidar Observations of Convective Phenomena in Oklahoma  

Science Conference Proceedings (OSTI)

On 30 June 1981, the wind fields around a variety of convective clouds, ranging from large thunderstorm complexes to isolated cumulus congestus, were observed in Oklahoma using an airborne Doppler lidar operated by the National Aeronautics and ...

Eugene W. McCaul Jr.; Howard B. Bluestein; Richard J. Doviak

1987-09-01T23:59:59.000Z

473

Comparing Model-produced Convective Cloudiness with Observations  

Science Conference Proceedings (OSTI)

Convective cloudiness generated by a cumulus parameterization scheme of a large-scale numerical weather prediction model was compared with analyses of clouds observed by geosynchronous satellites. The comparisons were performed over an equatorial ...

D. C. Norquist; C. Yang

1992-05-01T23:59:59.000Z

474

Midlevel Cyclonic Vortices Generated by Mesoseale Convective Systems  

Science Conference Proceedings (OSTI)

Despite the large number of convective systems that occur over the central United States every year, there are typically only a few well-defined, midlevel vortices apparent in satellite imagery after the overlying anvil debris from some ...

Diana L. Bartels; Robert A. Maddox

1991-01-01T23:59:59.000Z

475

Atlantic Tropical Cyclogenesis: A Three-Way Interaction between an African Easterly Wave, Diurnally Varying Convection, and a Convectively Coupled Atmospheric Kelvin Wave  

Science Conference Proceedings (OSTI)

This paper explores a three-way interaction between an African easterly wave (AEW), the diurnal cycle of convection over the Guinea Highlands (GHs), and a convectively coupled atmospheric equatorial Kelvin wave (CCKW). These interactions resulted ...

Michael J. Ventrice; Christopher D. Thorncroft; Matthew A. Janiga

2012-04-01T23:59:59.000Z

476

Applicability of Large-Scale Convection and Condensation Parameterization to Meso-?-Scale HIRLAM: A Case Study of a Convective Event  

Science Conference Proceedings (OSTI)

This paper presents a case study of a single cold air outbreak event with widespread convective precipitation over southern Finland on 25 May 2001. The purpose of the study is to investigate the applicability of the convection and condensation ...

Sami Niemelä; Carl Fortelius

2005-08-01T23:59:59.000Z

477

The Impact of Large-Scale Forcing on Skill of Simulated Convective Initiation and Upscale Evolution with Convection-Allowing Grid Spacings in the WRF  

Science Conference Proceedings (OSTI)

A set of mesoscale convective systems (MCSs) was simulated using the Weather Research and Forecasting model with 3-km grid spacing to investigate the skill at predicting convective initiation and upscale evolution into an MCS. Precipitation was ...

Jeffrey D. Duda; William A. Gallus Jr.

2013-08-01T23:59:59.000Z

478

An Analytical Study of the Dependence of Orientation and Propagation of the Arabian Sea Convection Bands on Wind Shear, Static Stability, and Preexisting Convection  

Science Conference Proceedings (OSTI)

Organization of convection into bands over the Arabian Sea during a monsoon onset was studied analytically. Observed vertical profiles of temperature, moisture, and wind velocity were used as base states by a linear model of convection to deduce ...

John R. Roadcap; Gandikota V. Rao

1993-06-01T23:59:59.000Z

479

A Numerical Sensitivity Study on the Impact of Soil Moisture on Convection-Related Parameters and Convective Precipitation over Complex Terrain  

Science Conference Proceedings (OSTI)

The impact of soil moisture on convection-related parameters and convective precipitation over complex terrain is studied by numerical experiments using the nonhydrostatic Consortium for Small-Scale Modeling (COSMO) model. For 1 day of the ...

Christian Barthlott; Norbert Kalthoff

2011-12-01T23:59:59.000Z

480

Interannual to Diurnal Variations in Tropical and Subtropical Deep Convective Clouds and Convective Overshooting from Seven Years of AMSU-B Measurements  

Science Conference Proceedings (OSTI)

This study surveys interannual to diurnal variations of tropical deep convective clouds and convective overshooting using the Advanced Microwave Sounding Unit B (AMSU-B) aboard the NOAA polar orbiting satellites from 1999 to 2005. The methodology ...

Gang Hong; Georg Heygster; Justus Notholt; Stefan A. Buehler

2008-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "midlatitude continental convective" 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

The Convective Instability Pathway to Warm Season Drought in Texas. Part I: The Role of Convective Inhibition and Its Modulation by Soil Moisture  

Science Conference Proceedings (OSTI)

This research is designed to investigate how convective instability influences monthly mean precipitation in Texas in the summertime and to examine the modulation of convective instability and precipitation by local and regional forcings. Since ...

Boksoon Myoung; John W. Nielsen-Gammon

2010-09-01T23:59:59.000Z

482

Handbook of single-phase convective heat transfer  

Science Conference Proceedings (OSTI)

This book presents a comprehensive collection of convective heat transfer basics, methods of calculations, tables, charts and design parameters involving single-phase flows - the most commonly experienced mode in heat transfer problems. Topics covered include natural and forced convection under a wise variety of design conditions, such as ducts, crossflows, turbulent conditions, transitional states, curved and coiled ducts, over rods in metals and through bends, valves and fittings. The book provides sections on radiation interaction and fouling conditions.

Kakac, S.; Shah, R.K.; Aung, W.

1987-01-01T23:59:59.000Z

483

SCALE ANALYSIS OF CONVECTIVE MELTING WITH INTERNAL HEAT GENERATION  

SciTech Connect

Using a scale analysis approach, we model phase change (melting) for pure materials which generate internal heat for small Stefan numbers (approximately one). The analysis considers conduction in the solid phase and natural convection, driven by internal heat generation, in the liquid regime. The model is applied for a constant surface temperature boundary condition where the melting temperature is greater than the surface temperature in a cylindrical geometry. We show the time scales in which conduction and convection heat transfer dominate.

John Crepeau

2011-03-01T23:59:59.000Z

484

POSSIBLE SOLAR CYCLE VARIATIONS IN THE CONVECTION ZONE  

E-Print Network (OSTI)

Abstract. Using data from the Global Oscillations Network Group (GONG) that covers the period from 1995 to 1998 we study the change in frequencies of solar oscillations with solar activity. From these frequencies we attempt to determine any possible variation in solar structure with solar activity. We do not find any evidence of a change in the convection zone depth or extent of overshoot below the convection zone during the solar cycle.

Sarbani Basu; H. M. Antia

2008-01-01T23:59:59.000Z

485

TURBULENT CONVECTION MODEL IN THE OVERSHOOTING REGION. II. THEORETICAL ANALYSIS  

SciTech Connect

Turbulent convection models (TCMs) are thought to be good tools to deal with the convective overshooting in the stellar interior. However, they are too complex to be applied to calculations of stellar structure and evolution. In order to understand the physical processes of the convective overshooting and to simplify the application of TCMs, a semi-analytic solution is necessary. We obtain the approximate solution and asymptotic solution of the TCM in the overshooting region, and find some important properties of the convective overshooting. (1) The overshooting region can be partitioned into three parts: a thin region just outside the convective boundary with high efficiency of turbulent heat transfer, a power-law dissipation region of turbulent kinetic energy in the middle, and a thermal dissipation area with rapidly decreasing turbulent kinetic energy. The decaying indices of the turbulent correlations k, u{sub r}'T'-bar, and T'T'-bar are only determined by the parameters of the TCM, and there is an equilibrium value of the anisotropic degree {omega}. (2) The overshooting length of the turbulent heat flux u{sub r}'T'-bar is about 1H{sub k} (H{sub k} = |dr/dln k|). (3) The value of the turbulent kinetic energy at the convective boundary k{sub C} can be estimated by a method called the maximum of diffusion. Turbulent correlations in the overshooting region can be estimated by using k{sub C} and exponentially decreasing functions with the decaying indices.

Zhang, Q. S.; Li, Y., E-mail: zqs@ynao.ac.cn, E-mail: ly@ynao.ac.cn [National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, Kunming 650011 (China)

2012-05-01T23:59:59.000Z

486

AN ANALYTIC RADIATIVE-CONVECTIVE MODEL FOR PLANETARY ATMOSPHERES  

Science Conference Proceedings (OSTI)

We present an analytic one-dimensional radiative-convective model of the thermal structure of planetary atmospheres. Our model assumes that thermal radiative transfer is gray and can be represented by the two-stream approximation. Model atmospheres are assumed to be in hydrostatic equilibrium, with a power-law scaling between the atmospheric pressure and the gray thermal optical depth. The convective portions of our models are taken to follow adiabats that account for condensation of volatiles through a scaling parameter to the dry adiabat. By combining these assumptions, we produce simple, analytic expressions that allow calculations of the atmospheric-pressure-temperature profile, as well as expressions for the profiles of thermal radiative flux and convective flux. We explore the general behaviors of our model. These investigations encompass (1) worlds where atmospheric attenuation of sunlight is weak, which we show tend to have relatively high radiative-convective boundaries; (2) worlds with some attenuation of sunlight throughout the atmosphere, which we show can produce either shallow or deep radiative-convective boundaries, depending on the strength of sunlight attenuation; and (3) strongly irradiated giant planets (including hot Jupiters), where we explore the conditions under which these worlds acquire detached convective regions in their mid-tropospheres. Finally, we validate our model and demonstrate its utility through comparisons to the average observed thermal structure of Venus, Jupiter, and Titan, and by comparing computed flux profiles to more complex models.

Robinson, Tyler D. [Astronomy Department, University of Washington, Box 351580, Seattle, WA 98195-1580 (United States); Catling, David C., E-mail: robinson@astro.washington.edu [Department of Earth and Space Sciences, University of Washington, Box 351310, Seattle, WA 98195-1310 (United States)

2012-09-20T23:59:59.000Z

487

Tropical Island Convection in the Absence of Significant Topography. Part I: Life Cycle of Diurnally Forced Convection  

Science Conference Proceedings (OSTI)

Diurnally forced convection was observed over the Tiwi Islands, north of the Australian continent, as part of the Maritime Continent Thunderstorm Experiment. Immature peninsula-scale (5–15 km) sea breezes were observed to initiate moist ...

R. E. Carbone; J. W. Wilson; T. D. Keenan; J. M. Hacker

2000-10-01T23:59:59.000Z

488

Comparing the Convective Structure and Microphysics in Two Sahelian Mesoscale Convective Systems: Radar Observations and CRM Simulations  

Science Conference Proceedings (OSTI)

Two mesoscale convective systems (MCSs) observed during the African Monsoon Multidisciplinary Analyses (AMMA) experiment are simulated using the three-dimensional (3D) Goddard Cumulus Ensemble model. This study was undertaken to determine the ...

Nick Guy; Xiping Zeng; Steven A. Rutledge; Wei-Kuo Tao

2013-02-01T23:59:59.000Z

489

Simulated Convective Lines with Parallel Stratiform Precipitation. Part I: An Archetype for Convection in Along-Line Shear  

Science Conference Proceedings (OSTI)

This article, the first of two describing convective lines with parallel stratiform (PS) precipitation, addresses the basic kinematic and precipitation features of these systems. The PS mode appears to be the preferred organizational structure in ...

Matthew D. Parker

2007-02-01T23:59:59.000Z

490

A Satellite-Based Convective Cloud Object Tracking and Multipurpose Data Fusion Tool with Application to Developing Convection  

Science Conference Proceedings (OSTI)

Studying deep convective clouds requires the use of available observation platforms with high temporal and spatial resolution, as well as other non–remote sensing meteorological data (i.e., numerical weather prediction model output, conventional ...

Justin M. Sieglaff; Daniel C. Hartung; Wayne F. Feltz; Lee M. Cronce; Valliappa Lakshmanan

2013-03-01T23:59:59.000Z

491

Nonlinear Midlatitude Ocean Adjustment  

Science Conference Proceedings (OSTI)

Ocean adjustment on annual to interdecadal scales to variable forcing is considered for a more nonlinear general circulation than has previously been studied. The nature of the response is a strong function of forcing frequency and importantly ...

William K. Dewar

2003-05-01T23:59:59.000Z

492

Lease Issuance for Marine Hydrokinetic Technology Testing on the Outer Continental Shelf  

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

the Interior the Interior Bureau of Ocean Energy Management Office of Renewable Energy Programs OCS EIS/EA BOEM 2013-01140 Lease Issuance for Marine Hydrokinetic Technology Testing on the Outer Continental Shelf Offshore Florida Revised Environmental Assessment OCS EIS/EA BOEM 2013-01140 Lease Issuance for Marine Hydrokinetic Technology Testing on the Outer Continental Shelf Offshore Florida Revised Environmental Assessment Author Bureau of Ocean Energy Management Office of Renewable Energy Programs Published by U.S. Department of the Interior Bureau of Ocean Energy Management Office of Renewable Energy Programs August 2013 iii FINDING OF NO SIGNIIFCANT IMPACT Lease Issuance for Marine Hydrokinetic Technology Testing on the Outer Continental

493

Effects of cumulus convection on the simulated monsoon circulation in a general circulation model  

SciTech Connect

The effect of cumulus convection on the Asian summer monsoon circulation is investigated, using a general circulation model. Two simulations for the summer months (June, July, and August) are performed, one parameterizing convection using a mass flux scheme and the other without convective parameterization. The results show that convection has significant effects on the monsoon circulation and its associated precipitation. In the simulation with the mass flux convective parameterization, precipitation in the western Pacific is decreased, together with a decrease in surface evaporation and wind speed. In the indian monsoon region it is almost the opposite. Comparison with a simulation using moist convective adjustment to parameterize convection shows that the monsoon circulation and precipitation distribution in the no-convection simulation are very similar to those in the simulation with moist convective adjustment. The difference in the large-scale circulation with and without convective parameterization is interpreted in terms of convective stabilization of the atmosphere by convection, using dry and moist static energy budgets. It is shown that weakening of the low-level convergence in the western Pacific in the simulation with convection is closely associated with the stabilization of the atmosphere by convection, mostly through drying of the lower troposphere; changes in low-level convergence lead to changes in precipitation. The precipitation increase in the Indian monsoon can be explained similarly. 29 refs., 12 figs.

Zhang, Guang Jun (Univ. of California, San Diego, La Jolla, CA (United States))

1994-09-01T23:59:59.000Z

494

Physics of greenhouse effect and convection in warm Oceans  

SciTech Connect

Sea surface temperatures (SST) in roughly 50% of the tropical Pacific Ocean is warm enough (SST > 300 K) to permit deep convection. This paper examines the effects of deep convection on the climatological mean vertical distributions of water vapor and its greenhouse effect over such warm oceans. The study also examines the link between SST, vertical distribution of water vapor, and its greenhouse effect in the tropical oceans. The radiation model calculations do not include the effects of clouds. The data are grouped into nonconvective and convective categories using SST as an index for convective activity. On average, convective regions are more humid, trap significantly more longwave radiation, and emit more radiation to the sea surface. The greenhouse effect in regions of convection operates as per classical ideas, that is, as the SST increases, the atmosphere traps the excess longwave energy emitted by the surface and reradiates it locally back to the ocean surface. The important departure from the classical picture is that the net (up minus down) fluxes at the surface and at the top-of-the atmosphere decrease with an increase in SST; that is, the surface and the surface-troposphere column lose the ability to radiate the excess energy to space. The cause of this upper greenhouse effect at the surface is the rapid increase in the lower-troposphere humidity with SST; that of the column is due to a combination of increase in humidity in the entire column and increase in the lapse rate within the lower troposphere. The increase in the vertical distribution of humidity far exceeds that which can be attributed to the temperature dependence of saturation vapor pressure; that is, the tropospheric relative humidity is larger in convective regions. The positive coupling between SST and the radiative warming of the surface by the water vapor greenhouse effect is also shown to exist on interannual time scales. 35 refs., 17 figs. 4 tabs.

Inamdar, A.K.; Ramanathan, V. (Univ. of California, San Diego, La Jolla, CA (United States))

1994-05-01T23:59:59.000Z

495

Rates of tectonic and magmatic processes in the North Cascades continental magmatic arc  

E-Print Network (OSTI)

Continental magmatic arcs are among the most dynamic. geologic systems, and documentation of the magmatic, thermal, and tectonic evolution of arcs is essential for understanding the processes of magma generation, ascent ...

Matzel, Jennifer E. Piontek, 1973-

2004-01-01T23:59:59.000Z

496

Circulation Induced by River Inflow in Well Mixed Water over a Sloping Continental Shelf  

Science Conference Proceedings (OSTI)

The pressure field over a sloping continental shelf subject to freshwater runoff at the coast can be resolved into a nearly two-dimensional dynamic height field and a residual field, the latter arising from the interaction of baroclinity and ...

G. T. Csanady

1984-11-01T23:59:59.000Z

497

The Mean Along-Isobath Heat and Salt Balances over the Middle Atlantic Bight Continental Shelf  

Science Conference Proceedings (OSTI)

The mean heat and salt balances over the Middle Atlantic Bight continental shelf are investigated by testing the hypothesis that surface fluxes of heat or freshwater are balanced by along-isobath fluxes resulting from the mean, depth-averaged, ...

Steven J. Lentz

2010-05-01T23:59:59.000Z

498

Polarimetric Radar Analysis of Raindrop Size Variability in Maritime and Continental Clouds  

Science Conference Proceedings (OSTI)

During the Queensland Cloud Seeding Research Program, the “CP2” polarimetric radar parameter differential radar reflectivity Zdr was used to examine the raindrop size evolution in both maritime and continental clouds. The focus of this paper is to ...

James W. Wilson; Charles A. Knight; Sarah A. Tessendorf; Courtney Weeks

2011-09-01T23:59:59.000Z

499

Advancing Global-and Continental-Scale Hydrometeorology: Contributions of GEWEX Hydrometeorology Panel  

Science Conference Proceedings (OSTI)

Over the past 9 years, the Global Energy and Water Cycle Experiment (GEWEX), under the auspices of the World Climate Research Programme (WCRP), has coordinated the activities of the Continental Scale Experiments (CSEs) and other related research ...

R. G. Lawford; R. Stewart; J. Roads; H-J. Isemer; M. Manton; J. Marengo; T. Yasunari; S. Benedict; T. Koike; S. Williams

2004-12-01T23:59:59.000Z

500

Air, Sea, and Land Interactions of the Continental U.S. Hydroclimate  

Science Conference Proceedings (OSTI)

Multidecadal simulations over the continental United States by an atmospheric general circulation model coupled to an ocean general circulation model is compared with that forced by observed sea surface temperature (SST). The differences in the ...

Vasubandhu Misra; P. A. Dirmeyer

2009-04-01T23:59:59.000Z