气候变化领域集成服务门户(CCPortal): The Impact of Variable Land-Atmosphere Coupling on Convective Cloud Populations Observed During the 2016 HI-SCALE Field Campaign

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DOI	10.1029/2019MS001727
	The Impact of Variable Land-Atmosphere Coupling on Convective Cloud Populations Observed During the 2016 HI-SCALE Field Campaign
	Fast J.D.; Berg L.K.; Feng Z.; Mei F.; Newsom R.; Sakaguchi K.; Xiao H.
发表日期	2019
ISSN	19422466
起始页码	2629
结束页码	2654
卷号	11 期号:8
英文摘要	We use a large-eddy simulation model with a nested domain configuration (297 and 120 km wide) and an interactive land surface parameterization to simulate the complex population of shallow clouds observed on 30 August 2016 during the Holistic Interactions of Shallow Clouds, Aerosols, and Land-Ecosystems campaign conducted in north-central Oklahoma. Shallow convective clouds first formed over southeast Oklahoma and then spread toward the northwest into southern Kansas. By the early afternoon, the relatively uniform shallow cloud field became more complex in which some regions became nearly cloud free and in other regions larger shallow clouds developed with some transitioning to deeper, precipitating convection. We show that the model reproduces the observed heterogeneity in the cloud populations only when realistic variations in soil moisture are used to initialize the model. While more variable soil moisture and to a lesser extent cool lake temperatures drive the initial spatial heterogeneity in the cloud populations, precipitation-driven cold pools become an important factor after 1300 CST. When smoother soil moisture variations are used in the model, more uniform shallow cloud populations are predicted with far fewer clouds that transition to deeper, precipitating convection that produce cold pools. An algorithm that tracks thousands of individual cumulus show that the more realistic soil moisture distributions produces clouds that are larger and have a longer lifetime. The results suggest that shallow and deep convection parameterizations used by mesoscale models need to account for the effects of variable land-atmosphere interactions and cold pools. ©2019. The Authors.
英文关键词	convective clouds; land-atmosphere coupling; LES model; soil moisture
语种	英语
scopus关键词	Clouds; Lakes; Large eddy simulation; Soil moisture; Soil surveys; Convective clouds; Domain configurations; Holistic interactions; Land atmosphere interaction; Land surface parameterization; Land-atmosphere couplings; Soil moisture distribution; Variable soil moistures; Precipitation (meteorology); aerosol; algorithm; cumulus; heterogeneity; land-atmosphere interaction; large eddy simulation; mesoscale eddy; numerical model; parameterization; soil moisture; Kansas; Oklahoma [United States]; United States
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/156877
作者单位	Pacific Northwest National Laboratory, Richland, WA, United States
推荐引用方式 GB/T 7714	Fast J.D.,Berg L.K.,Feng Z.,et al. The Impact of Variable Land-Atmosphere Coupling on Convective Cloud Populations Observed During the 2016 HI-SCALE Field Campaign[J],2019,11(8).
APA	Fast J.D..,Berg L.K..,Feng Z..,Mei F..,Newsom R..,...&Xiao H..(2019).The Impact of Variable Land-Atmosphere Coupling on Convective Cloud Populations Observed During the 2016 HI-SCALE Field Campaign.Journal of Advances in Modeling Earth Systems,11(8).
MLA	Fast J.D.,et al."The Impact of Variable Land-Atmosphere Coupling on Convective Cloud Populations Observed During the 2016 HI-SCALE Field Campaign".Journal of Advances in Modeling Earth Systems 11.8(2019).