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Title: Large-Eddy Simulation of Shallow Cumulus over Land: A Composite Case Based on ARM Long-Term Observations at Its Southern Great Plains Site

Abstract

Abstract Based on long-term observations by the Atmospheric Radiation Measurement program at its Southern Great Plains site, a new composite case of continental shallow cumulus (ShCu) convection is constructed for large-eddy simulations (LES) and single-column models. The case represents a typical daytime nonprecipitating ShCu whose formation and dissipation are driven by the local atmospheric conditions and land surface forcing and are not influenced by synoptic weather events. The case includes early morning initial profiles of temperature and moisture with a residual layer; diurnally varying sensible and latent heat fluxes, which represent a domain average over different land surface types; simplified large-scale horizontal advective tendencies and subsidence; and horizontal winds with prevailing direction and average speed. Observed composite cloud statistics are provided for model evaluation. The observed diurnal cycle is well reproduced by LES; however, the cloud amount, liquid water path, and shortwave radiative effect are generally underestimated. LES are compared between simulations with an all-or-nothing bulk microphysics and a spectral bin microphysics. The latter shows improved agreement with observations in the total cloud cover and the amount of clouds with depths greater than 300 m. When compared with radar retrievals of in-cloud air motion, LES produce comparable downdraft vertical velocities,more » but a larger updraft area, velocity, and updraft mass flux. Both observations and LES show a significantly larger in-cloud downdraft fraction and downdraft mass flux than marine ShCu.« less

Authors:
 [1];  [1];  [2];  [3];  [4];  [1];  [1]
  1. Lawrence Livermore National Laboratory, Livermore, California
  2. Pacific Northwest National Laboratory, Richland, Washington
  3. Division of Meteorology and Physical Oceanography, University of Miami, Miami, Florida
  4. School of Marine and Atmospheric Sciences, Stony Brook University, State University of New York, Stony Brook, New York
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
OSTI Identifier:
1392734
Alternate Identifier(s):
OSTI ID: 1398224
Report Number(s):
PNNL-SA-127650
Journal ID: ISSN 0022-4928
Grant/Contract Number:  
AC05-76RL01830
Resource Type:
Published Article
Journal Name:
Journal of the Atmospheric Sciences
Additional Journal Information:
Journal Name: Journal of the Atmospheric Sciences Journal Volume: 74 Journal Issue: 10; Journal ID: ISSN 0022-4928
Publisher:
American Meteorological Society
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; Clouds; Cumulus clouds; Large eddy simulations

Citation Formats

Zhang, Yunyan, Klein, Stephen A., Fan, Jiwen, Chandra, Arunchandra S., Kollias, Pavlos, Xie, Shaocheng, and Tang, Shuaiqi. Large-Eddy Simulation of Shallow Cumulus over Land: A Composite Case Based on ARM Long-Term Observations at Its Southern Great Plains Site. United States: N. p., 2017. Web. https://doi.org/10.1175/JAS-D-16-0317.1.
Zhang, Yunyan, Klein, Stephen A., Fan, Jiwen, Chandra, Arunchandra S., Kollias, Pavlos, Xie, Shaocheng, & Tang, Shuaiqi. Large-Eddy Simulation of Shallow Cumulus over Land: A Composite Case Based on ARM Long-Term Observations at Its Southern Great Plains Site. United States. https://doi.org/10.1175/JAS-D-16-0317.1
Zhang, Yunyan, Klein, Stephen A., Fan, Jiwen, Chandra, Arunchandra S., Kollias, Pavlos, Xie, Shaocheng, and Tang, Shuaiqi. Tue . "Large-Eddy Simulation of Shallow Cumulus over Land: A Composite Case Based on ARM Long-Term Observations at Its Southern Great Plains Site". United States. https://doi.org/10.1175/JAS-D-16-0317.1.
@article{osti_1392734,
title = {Large-Eddy Simulation of Shallow Cumulus over Land: A Composite Case Based on ARM Long-Term Observations at Its Southern Great Plains Site},
author = {Zhang, Yunyan and Klein, Stephen A. and Fan, Jiwen and Chandra, Arunchandra S. and Kollias, Pavlos and Xie, Shaocheng and Tang, Shuaiqi},
abstractNote = {Abstract Based on long-term observations by the Atmospheric Radiation Measurement program at its Southern Great Plains site, a new composite case of continental shallow cumulus (ShCu) convection is constructed for large-eddy simulations (LES) and single-column models. The case represents a typical daytime nonprecipitating ShCu whose formation and dissipation are driven by the local atmospheric conditions and land surface forcing and are not influenced by synoptic weather events. The case includes early morning initial profiles of temperature and moisture with a residual layer; diurnally varying sensible and latent heat fluxes, which represent a domain average over different land surface types; simplified large-scale horizontal advective tendencies and subsidence; and horizontal winds with prevailing direction and average speed. Observed composite cloud statistics are provided for model evaluation. The observed diurnal cycle is well reproduced by LES; however, the cloud amount, liquid water path, and shortwave radiative effect are generally underestimated. LES are compared between simulations with an all-or-nothing bulk microphysics and a spectral bin microphysics. The latter shows improved agreement with observations in the total cloud cover and the amount of clouds with depths greater than 300 m. When compared with radar retrievals of in-cloud air motion, LES produce comparable downdraft vertical velocities, but a larger updraft area, velocity, and updraft mass flux. Both observations and LES show a significantly larger in-cloud downdraft fraction and downdraft mass flux than marine ShCu.},
doi = {10.1175/JAS-D-16-0317.1},
journal = {Journal of the Atmospheric Sciences},
number = 10,
volume = 74,
place = {United States},
year = {2017},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1175/JAS-D-16-0317.1

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Cited by: 8 works
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Works referencing / citing this record:

The Impact of Surface Heterogeneities and Land‐Atmosphere Interactions on Shallow Clouds Over ARM SGP Site
journal, June 2018

  • Xiao, Heng; Berg, Larry K.; Huang, Maoyi
  • Journal of Advances in Modeling Earth Systems, Vol. 10, Issue 6
  • DOI: 10.1029/2018ms001286

The Impact of Surface Heterogeneities and Land‐Atmosphere Interactions on Shallow Clouds Over ARM SGP Site
journal, June 2018

  • Xiao, Heng; Berg, Larry K.; Huang, Maoyi
  • Journal of Advances in Modeling Earth Systems, Vol. 10, Issue 6
  • DOI: 10.1029/2018ms001286

On the Harvest of Predictability From Land States in a Global Forecast Model
journal, December 2018

  • Dirmeyer, Paul A.; Halder, Subhadeep; Bombardi, Rodrigo
  • Journal of Geophysical Research: Atmospheres, Vol. 123, Issue 23
  • DOI: 10.1029/2018jd029103

Differences in Eddy‐Correlation and Energy‐Balance Surface Turbulent Heat Flux Measurements and Their Impacts on the Large‐Scale Forcing Fields at the ARM SGP Site
journal, March 2019

  • Tang, Shuaiqi; Xie, Shaocheng; Zhang, Minghua
  • Journal of Geophysical Research: Atmospheres, Vol. 124, Issue 6
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Improved Spatiotemporal Representativeness and Bias Reduction of Satellite‐Based Evapotranspiration Retrievals via Use of In Situ Meteorology and Constrained Canopy Surface Resistance
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  • Sullivan, Ryan C.; Cook, David R.; Ghate, Virendra P.
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Accounting for Vertical Subgrid‐Scale Heterogeneity in Low‐Level Cloud Fraction Parameterizations
journal, November 2018

  • Jouhaud, J.; Dufresne, J. ‐L.; Madeleine, J. ‐B.
  • Journal of Advances in Modeling Earth Systems, Vol. 10, Issue 11
  • DOI: 10.1029/2018ms001379

Evaluating and Improving a PDF Cloud Scheme Using High‐Resolution Super Large Domain Simulations
journal, September 2018

  • Griewank, P. J.; Schemann, V.; Neggers, R. A. J.
  • Journal of Advances in Modeling Earth Systems, Vol. 10, Issue 9
  • DOI: 10.1029/2018ms001421

Reconciling Differences Between Large‐Eddy Simulations and Doppler Lidar Observations of Continental Shallow Cumulus Cloud‐Base Vertical Velocity
journal, October 2019

  • Endo, Satoshi; Zhang, Damao; Vogelmann, Andrew M.
  • Geophysical Research Letters, Vol. 46, Issue 20
  • DOI: 10.1029/2019gl084893

The Impact of Variable Land‐Atmosphere Coupling on Convective Cloud Populations Observed During the 2016 HI‐SCALE Field Campaign
journal, August 2019

  • Fast, Jerome D.; Berg, Larry K.; Feng, Zhe
  • Journal of Advances in Modeling Earth Systems, Vol. 11, Issue 8
  • DOI: 10.1029/2019ms001727

Core and margin in warm convective clouds – Part 1: Core types and evolution during a cloud's lifetime
journal, January 2019

  • Heiblum, Reuven H.; Pinto, Lital; Altaratz, Orit
  • Atmospheric Chemistry and Physics, Vol. 19, Issue 16
  • DOI: 10.5194/acp-19-10717-2019