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Title: Insights from modeling and observational evaluation of a precipitating continental cumulus event observed during the MC3E field campaign

Abstract

A case of shallow cumulus and precipitating cumulus congestus sampled at the Atmospheric Radiation Measurement (ARM) Program Southern Great Plains (SGP) supersite is analyzed using a multi-sensor observational approach and numerical simulation. Observations from a new radar suite surrounding the facility are used to characterize the evolving statistical behavior of the precipitating cloud system. This is accomplished using distributions of different measures of cloud geometry and precipitation properties. Large-eddy simulation (LES) with size-resolved (bin) microphysics is employed to determine the forcings most important in producing the salient aspects of the cloud system captured in the radar observations. Our emphasis is on assessing the importance of time-varying vs. steady-state large-scale forcing on the model's ability to reproduce the evolutionary behavior of the cloud system. Additional consideration is given to how the characteristic spatial scale and homogeneity of the forcing imposed on the simulation influences the evolution of cloud system properties. Results indicate that several new scanning radar estimates such as distributions of cloud top are useful to differentiate the value of time-varying (or at least temporally well-matched) forcing on LES solution fidelity.

Authors:
 [1];  [2];  [1];  [3];  [2];  [3]
  1. Univ. of Kansas, Lawrence, KS (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. McGill Univ., Montreal, QC (Canada)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1201353
Alternate Identifier(s):
OSTI ID: 1402354
Report Number(s):
BNL-108017-2015-JA
Journal ID: ISSN 2169-897X; R&D Project: 2016-BNL-EE630EECA-Budg; KP1701000
Grant/Contract Number:  
SC00112704; SC0006736
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Geophysical Research: Atmospheres
Additional Journal Information:
Journal Volume: 120; Journal Issue: 5; Journal ID: ISSN 2169-897X
Publisher:
American Geophysical Union
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES

Citation Formats

Mechem, David B., Giangrande, Scott E., Wittman, Carly S., Borque, Paloma, Toto, Tami, and Kollias, Pavlos. Insights from modeling and observational evaluation of a precipitating continental cumulus event observed during the MC3E field campaign. United States: N. p., 2015. Web. doi:10.1002/2014JD022255.
Mechem, David B., Giangrande, Scott E., Wittman, Carly S., Borque, Paloma, Toto, Tami, & Kollias, Pavlos. Insights from modeling and observational evaluation of a precipitating continental cumulus event observed during the MC3E field campaign. United States. doi:10.1002/2014JD022255.
Mechem, David B., Giangrande, Scott E., Wittman, Carly S., Borque, Paloma, Toto, Tami, and Kollias, Pavlos. Fri . "Insights from modeling and observational evaluation of a precipitating continental cumulus event observed during the MC3E field campaign". United States. doi:10.1002/2014JD022255. https://www.osti.gov/servlets/purl/1201353.
@article{osti_1201353,
title = {Insights from modeling and observational evaluation of a precipitating continental cumulus event observed during the MC3E field campaign},
author = {Mechem, David B. and Giangrande, Scott E. and Wittman, Carly S. and Borque, Paloma and Toto, Tami and Kollias, Pavlos},
abstractNote = {A case of shallow cumulus and precipitating cumulus congestus sampled at the Atmospheric Radiation Measurement (ARM) Program Southern Great Plains (SGP) supersite is analyzed using a multi-sensor observational approach and numerical simulation. Observations from a new radar suite surrounding the facility are used to characterize the evolving statistical behavior of the precipitating cloud system. This is accomplished using distributions of different measures of cloud geometry and precipitation properties. Large-eddy simulation (LES) with size-resolved (bin) microphysics is employed to determine the forcings most important in producing the salient aspects of the cloud system captured in the radar observations. Our emphasis is on assessing the importance of time-varying vs. steady-state large-scale forcing on the model's ability to reproduce the evolutionary behavior of the cloud system. Additional consideration is given to how the characteristic spatial scale and homogeneity of the forcing imposed on the simulation influences the evolution of cloud system properties. Results indicate that several new scanning radar estimates such as distributions of cloud top are useful to differentiate the value of time-varying (or at least temporally well-matched) forcing on LES solution fidelity.},
doi = {10.1002/2014JD022255},
journal = {Journal of Geophysical Research: Atmospheres},
number = 5,
volume = 120,
place = {United States},
year = {Fri Mar 13 00:00:00 EDT 2015},
month = {Fri Mar 13 00:00:00 EDT 2015}
}

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