气候变化领域集成服务门户(CCPortal): Response of Convective Boundary Layer and Shallow Cumulus to Soil Moisture Heterogeneity: A Large-Eddy Simulation Study

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DOI	10.1029/2019MS001772
	Response of Convective Boundary Layer and Shallow Cumulus to Soil Moisture Heterogeneity: A Large-Eddy Simulation Study
	Han C.; Brdar S.; Kollet S.
发表日期	2019
ISSN	19422466
起始页码	4305
结束页码	4322
卷号	11 期号:12
英文摘要	In this study, the impact of varying soil moisture heterogeneity (spatial variance and structure) on the development of the convective boundary layer and shallow cumulus clouds was investigated. Applying soil moisture heterogeneity generated via spatially correlated Gaussian random fields based on a power law model and idealized atmospheric vertical profiles as initial conditions, three sets of large-eddy simulations provide insight in the influence of soil moisture heterogeneity on the ensuing growth of the convective boundary layer and development of shallow cumulus clouds. A sensitivity on the strong, weak, and unstructured soil moisture heterogeneity is investigated. The simulation results show that domain-averaged land surface sensible heat and latent heat flux change strongly with changing soil moisture variance because of the interactions between surface heterogeneity and induced circulations, while domain means of soil moisture are identical. Vertical profiles of boundary layer characteristics are strongly influenced by the surface energy partitioning and induced circulations, especially the profiles of liquid water and liquid water flux. The amount of liquid water and liquid water flux increases with increasing structure. In addition, the liquid water path is higher in case of strongly-structured heterogeneity because more available energy is partitioned into latent heat and more intensive updrafts exist. Interestingly, the increase of liquid water path with increasing soil moisture variance only occurs in the strongly structured cases, which suggests that soil moisture variance and structure work conjunctively in the surface energy partitioning and the cloud formation. ©2019. American Geophysical Union. All Rights Reserved.
英文关键词	convective boundary layer; large-eddy simulation; shallow cumulus; soil moisture heterogeneity
语种	英语
scopus关键词	Atmospheric boundary layer; Boundary layer flow; Clouds; Gaussian distribution; Heat flux; Interfacial energy; Large eddy simulation; Latent heat; Liquids; Convective boundary layers; Energy partitioning; Gaussian random fields; Initial conditions; Liquid water paths; Shallow cumulus; Shallow cumulus clouds; Surface heterogeneities; Soil moisture; convective boundary layer; cumulus; heat flux; heterogeneity; large eddy simulation; soil moisture; surface energy
来源期刊	Journal of Advances in Modeling Earth Systems
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156817
作者单位	Institute for Bio- and Geosciences: Agrosphere (IBG-3), Research Centre Jülich, Jülich, Germany; Now at Institute of Meteorology and Climate Research (IMK-TRO), Karlsruhe Institute of Technology, Karlsruhe, Germany; Centre for High-Performance Scientific Computing in Terrestrial Systems, Geoverbund ABC/J, Jülich, Germany; SimLab TerrSys, Jülich Supercomputing Centre, Research Centre Jülich, Jülich, Germany
推荐引用方式 GB/T 7714	Han C.,Brdar S.,Kollet S.. Response of Convective Boundary Layer and Shallow Cumulus to Soil Moisture Heterogeneity: A Large-Eddy Simulation Study[J],2019,11(12).
APA	Han C.,Brdar S.,&Kollet S..(2019).Response of Convective Boundary Layer and Shallow Cumulus to Soil Moisture Heterogeneity: A Large-Eddy Simulation Study.Journal of Advances in Modeling Earth Systems,11(12).
MLA	Han C.,et al."Response of Convective Boundary Layer and Shallow Cumulus to Soil Moisture Heterogeneity: A Large-Eddy Simulation Study".Journal of Advances in Modeling Earth Systems 11.12(2019).