气候变化领域集成服务门户(CCPortal): Exploring seasonal and regional relationships between the Evaporative Stress Index and surface weather and soil moisture anomalies across the United States

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DOI	10.5194/hess-22-5373-2018
	Exploring seasonal and regional relationships between the Evaporative Stress Index and surface weather and soil moisture anomalies across the United States
	Otkin J.A.; Zhong Y.; Lorenz D.; Anderson M.C.; Hain C.
发表日期	2018
ISSN	1027-5606
起始页码	5373
结束页码	5386
卷号	22 期号:10
英文摘要	This study uses correlation analyses to explore relationships between the satellite-derived Evaporative Stress Index (ESI) - which depicts standardized anomalies in an actual to reference evapotranspiration (ET) fraction - and various land and atmospheric variables that impact ET. Correlations between the ESI and forcing variable anomalies calculated over sub-seasonal timescales were computed at weekly and monthly intervals during the growing season. Overall, the results revealed that the ESI is most strongly correlated to anomalies in soil moisture and 2m dew point depression. Correlations between the ESI and precipitation were also large across most of the US; however, they were typically smaller than those associated with soil moisture and vapor pressure deficit. In contrast, correlations were much weaker for air temperature, wind speed, and radiation across most of the US, with the exception of the south-central US where correlations were large for all variables at some point during the growing season. Together, these results indicate that changes in soil moisture and near-surface atmospheric vapor pressure deficit are better predictors of the ESI than precipitation and air temperature anomalies are by themselves. Large regional and seasonal dependencies were also observed for each forcing variable. Each of the regional and seasonal correlation patterns were similar for ESI anomalies computed over 2-, 4-, and 8-week time periods; however, the maximum correlations increased as the ESI anomalies were computed over longer time periods and also shifted toward longer averaging periods for the forcing variables. © 2018 Annales Geophysicae. All rights reserved.
语种	英语
scopus关键词	Atmospheric temperature; Evapotranspiration; Hydrostatic pressure; Wind; Air temperature; Atmospheric variables; Correlation analysis; Correlation patterns; Dew point depression; Maximum correlations; Reference evapotranspiration; Vapor pressure deficit; Soil moisture; air temperature; atmospheric forcing; dew point; evapotranspiration; growing season; index method; precipitation (climatology); seasonal variation; soil moisture; temperature anomaly; vapor pressure; United States
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159883
作者单位	Otkin, J.A., Space Science and Engineering Center, Cooperative Institute for Meteorological Satellite Studies, University of Wisconsin-Madison, Madison, WI, United States; Zhong, Y., Space Science and Engineering Center, Cooperative Institute for Meteorological Satellite Studies, University of Wisconsin-Madison, Madison, WI, United States; Lorenz, D., Center for Climatic Research, University of Wisconsin-Madison, Madison, WI, United States; Anderson, M.C., USDA Agricultural Research Service, Hydrology and Remote Sensing Laboratory, Beltsville, MD, United States; Hain, C., Marshall Space Flight Center, NASA, Earth Science Branch, Huntsville, AL, United States
推荐引用方式 GB/T 7714	Otkin J.A.,Zhong Y.,Lorenz D.,et al. Exploring seasonal and regional relationships between the Evaporative Stress Index and surface weather and soil moisture anomalies across the United States[J],2018,22(10).
APA	Otkin J.A.,Zhong Y.,Lorenz D.,Anderson M.C.,&Hain C..(2018).Exploring seasonal and regional relationships between the Evaporative Stress Index and surface weather and soil moisture anomalies across the United States.Hydrology and Earth System Sciences,22(10).
MLA	Otkin J.A.,et al."Exploring seasonal and regional relationships between the Evaporative Stress Index and surface weather and soil moisture anomalies across the United States".Hydrology and Earth System Sciences 22.10(2018).