气候变化领域集成服务门户(CCPortal): Large-Scale Forcing Impact on the Development of Shallow Convective Clouds Revealed From LASSO Large-Eddy Simulations

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DOI	10.1029/2021JD035208
	Large-Scale Forcing Impact on the Development of Shallow Convective Clouds Revealed From LASSO Large-Eddy Simulations
	Shin H.H.; Xue L.; Li W.; Firl G.; D’Amico D.F.; Muñoz-Esparza D.; Ek M.B.; Chu Y.; Wang Z.; Gustafson W.I.; Jr.; Vogelmann A.M.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:20
英文摘要	Real-world large-eddy simulations (LES) are driven by time-varying large-scale forcings (LSF)—e.g., temperature advection, moisture advection, and subsidence—derived from large-scale weather models. This study investigates the impact of the uncertainty in LSF on real-world LES in terms of the development of shallow convection at the Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP) atmospheric observatory for the June 11, 2016 case using LES provided by the U.S. Department of Energy's LES ARM Symbiotic Simulation and Observation (LASSO) activity. The LASSO data set provides an ensemble of LES for the selected case, which consists of LES runs that were driven by different LSF. The two contrasting LES runs investigated here generate different types of convective clouds, i.e., nonprecipitating shallow clouds and precipitating cumulus congestus, mainly due to the difference of LSF in temperature advection in the free troposphere. The temperature advection modulates the strength of the capping inversion and therefore the buoyancy of the air parcels rising from the atmospheric boundary layer (ABL). The inversion, together with large-scale updrafts, controls the penetration of the ABL thermals into the free troposphere, leading to cumulus congestus in the case of a weaker inversion. In contrast, clouds remain shallow in the case of a strong inversion. Differences between the two simulations are amplified over time, as mixed-phase clouds are formed near the top of the congestus in the weaker inversion case. This high dependency of LES results to LSF stresses the importance of accurate LSF by large-scale models to real-world LES simulations. © 2021 American Geophysical Union.
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/236940
作者单位	National Center for Atmospheric Research, Boulder, CO, United States; Department of Atmospheric and Oceanic Sciences, University of Colorado, Boulder, CO, United States; Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA, United States; Environmental and Climate Sciences, Brookhaven National Laboratory, Upton, NY, United States
推荐引用方式 GB/T 7714	Shin H.H.,Xue L.,Li W.,et al. Large-Scale Forcing Impact on the Development of Shallow Convective Clouds Revealed From LASSO Large-Eddy Simulations[J],2021,126(20).
APA	Shin H.H..,Xue L..,Li W..,Firl G..,D’Amico D.F..,...&Vogelmann A.M..(2021).Large-Scale Forcing Impact on the Development of Shallow Convective Clouds Revealed From LASSO Large-Eddy Simulations.Journal of Geophysical Research: Atmospheres,126(20).
MLA	Shin H.H.,et al."Large-Scale Forcing Impact on the Development of Shallow Convective Clouds Revealed From LASSO Large-Eddy Simulations".Journal of Geophysical Research: Atmospheres 126.20(2021).