气候变化领域集成服务门户(CCPortal): A sensitivity study on the response of convection initiation to in situ soil moisture in the central United States

CCPortal

DOI	10.1007/s00382-019-05098-0
	A sensitivity study on the response of convection initiation to in situ soil moisture in the central United States
	Yuan S.; Wang Y.; Quiring S.M.; Ford T.W.; Houston A.L.
发表日期	2020
ISSN	0930-7575
起始页码	2013
结束页码	2028
卷号	54
英文摘要	Soil moisture can affect precipitation, however there is significant debate about the sign and strength of land–atmosphere coupling. This may be due to the differences regarding the selection of data sources, the presence of atmospheric persistence, and the spatial and temporal scales of the analysis. This study is a sensitivity analysis that quantifies how each of these factors influences land–atmosphere coupling in the central United States from 2005 to 2007. Four different sources of soil moisture are used to represent soil moisture: in situ measurements and three satellite products. The Thunderstorm Observation by Radar (ThOR) algorithm is used to identify convective events. The results show that warm-season afternoon convection initiates preferentially over dry soil, if in situ measurements are used. However, when satellite data are used the sign and strength of the soil moisture-precipitation coupling varies depending on which satellite dataset is used. This demonstrates that evaluations of land–atmosphere coupling strength are sensitive to the source of soil moisture. Our results also show that accounting for atmospheric persistence tends to weaken apparent land–atmosphere coupling. Changing the spatial scale of the analysis can also influence the sign and coupling strength. Analyses that are performed at a coarser spatial resolution tend to indicate a wet preference because they do not capture the local negative feedbacks. This study demonstrates that contradictions in the literature regarding the sign and strength of soil moisture-precipitation feedbacks can be partly attributed to differences in datasets, methods and scale of the analysis. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Convection initiation; In situ soil moisture; Land–atmosphere interactions; ThOR
语种	英语
scopus关键词	algorithm; atmospheric convection; land-atmosphere interaction; satellite data; sensitivity analysis; soil moisture; spatial resolution; United States
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145600
作者单位	Department of Geography, The Ohio State University, Columbus, OH, United States; Illinois State Water Survey/Prairie Research Institute, University of Illinois at Urbana-Champaign, Champaign, IL, United States; Department of Earth and Atmospheric Sciences, University of Nebraska-Lincoln, Lincoln, NE, United States
推荐引用方式 GB/T 7714	Yuan S.,Wang Y.,Quiring S.M.,et al. A sensitivity study on the response of convection initiation to in situ soil moisture in the central United States[J],2020,54.
APA	Yuan S.,Wang Y.,Quiring S.M.,Ford T.W.,&Houston A.L..(2020).A sensitivity study on the response of convection initiation to in situ soil moisture in the central United States.Climate Dynamics,54.
MLA	Yuan S.,et al."A sensitivity study on the response of convection initiation to in situ soil moisture in the central United States".Climate Dynamics 54(2020).