Convective cloud vertical velocity and mass-flux characteristics from radar wind profiler observations during GoAmazon2014/5
Abstract
A radar wind profiler data set collected during the 2 year Department of Energy Atmospheric Radiation Measurement Observations and Modeling of the Green Ocean Amazon (GoAmazon2014/5) campaign is used to estimate convective cloud vertical velocity, area fraction, and mass flux profiles. Vertical velocity observations are presented using cumulative frequency histograms and weighted mean profiles to provide insights in a manner suitable for global climate model scale comparisons (spatial domains from 20 km to 60 km). Convective profile sensitivity to changes in environmental conditions and seasonal regime controls is also considered. Aggregate and ensemble average vertical velocity, convective area fraction, and mass flux profiles, as well as magnitudes and relative profile behaviors, are found consistent with previous studies. Updrafts and downdrafts increase in magnitude with height to midlevels (6 to 10 km), with updraft area also increasing with height. Updraft mass flux profiles similarly increase with height, showing a peak in magnitude near 8 km. Downdrafts are observed to be most frequent below the freezing level, with downdraft area monotonically decreasing with height. Updraft and downdraft profile behaviors are further stratified according to environmental controls. These results indicate stronger vertical velocity profile behaviors under higher convective available potential energy and lowermore »
- Authors:
-
- Brookhaven National Lab. (BNL), Upton, NY (United States). Environmental and Climate Sciences Dept.
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Centre for Australian Weather and Climate Research, Melbourne, Vic (Australia)
- Univ. of Colorado, Boulder, CO (United States); National Oceanic and Atmospheric Administration (NOAA), Boulder, CO (United States). Earth System Research Lab.
- Texas A&M Univ., College Station, TX (United States)
- National Inst. for Space Research, Sao Jose dos Campos (Brazil)
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- OSTI Identifier:
- 1344234
- Alternate Identifier(s):
- OSTI ID: 1339830
- Report Number(s):
- BNL-113519-2017-JA; PNNL-SA-122876
Journal ID: ISSN 2169-897X; R&D Project: 2016-BNL-EE630EECA-Budg; KP1701000
- Grant/Contract Number:
- SC0012704; AC05-76RL01830
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Geophysical Research: Atmospheres
- Additional Journal Information:
- Journal Volume: 121; Journal Issue: 21; Journal ID: ISSN 2169-897X
- Publisher:
- American Geophysical Union
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; mass flux; Amazon; radar wind profiler; vertical velocity; convection; GCM
Citation Formats
Giangrande, Scott E., Toto, Tami, Jensen, Michael P., Bartholomew, Mary Jane, Feng, Zhe, Protat, Alain, Williams, Christopher R., Schumacher, Courtney, and Machado, Luiz. Convective cloud vertical velocity and mass-flux characteristics from radar wind profiler observations during GoAmazon2014/5. United States: N. p., 2016.
Web. doi:10.1002/2016JD025303.
Giangrande, Scott E., Toto, Tami, Jensen, Michael P., Bartholomew, Mary Jane, Feng, Zhe, Protat, Alain, Williams, Christopher R., Schumacher, Courtney, & Machado, Luiz. Convective cloud vertical velocity and mass-flux characteristics from radar wind profiler observations during GoAmazon2014/5. United States. https://doi.org/10.1002/2016JD025303
Giangrande, Scott E., Toto, Tami, Jensen, Michael P., Bartholomew, Mary Jane, Feng, Zhe, Protat, Alain, Williams, Christopher R., Schumacher, Courtney, and Machado, Luiz. Fri .
"Convective cloud vertical velocity and mass-flux characteristics from radar wind profiler observations during GoAmazon2014/5". United States. https://doi.org/10.1002/2016JD025303. https://www.osti.gov/servlets/purl/1344234.
@article{osti_1344234,
title = {Convective cloud vertical velocity and mass-flux characteristics from radar wind profiler observations during GoAmazon2014/5},
author = {Giangrande, Scott E. and Toto, Tami and Jensen, Michael P. and Bartholomew, Mary Jane and Feng, Zhe and Protat, Alain and Williams, Christopher R. and Schumacher, Courtney and Machado, Luiz},
abstractNote = {A radar wind profiler data set collected during the 2 year Department of Energy Atmospheric Radiation Measurement Observations and Modeling of the Green Ocean Amazon (GoAmazon2014/5) campaign is used to estimate convective cloud vertical velocity, area fraction, and mass flux profiles. Vertical velocity observations are presented using cumulative frequency histograms and weighted mean profiles to provide insights in a manner suitable for global climate model scale comparisons (spatial domains from 20 km to 60 km). Convective profile sensitivity to changes in environmental conditions and seasonal regime controls is also considered. Aggregate and ensemble average vertical velocity, convective area fraction, and mass flux profiles, as well as magnitudes and relative profile behaviors, are found consistent with previous studies. Updrafts and downdrafts increase in magnitude with height to midlevels (6 to 10 km), with updraft area also increasing with height. Updraft mass flux profiles similarly increase with height, showing a peak in magnitude near 8 km. Downdrafts are observed to be most frequent below the freezing level, with downdraft area monotonically decreasing with height. Updraft and downdraft profile behaviors are further stratified according to environmental controls. These results indicate stronger vertical velocity profile behaviors under higher convective available potential energy and lower low-level moisture conditions. Sharp contrasts in convective area fraction and mass flux profiles are most pronounced when retrievals are segregated according to Amazonian wet and dry season conditions. During this deployment, wet season regimes favored higher domain mass flux profiles, attributed to more frequent convection that offsets weaker average convective cell vertical velocities.},
doi = {10.1002/2016JD025303},
journal = {Journal of Geophysical Research: Atmospheres},
number = 21,
volume = 121,
place = {United States},
year = {Fri Oct 21 00:00:00 EDT 2016},
month = {Fri Oct 21 00:00:00 EDT 2016}
}
Web of Science
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