DOI: 10.1002/2013GL058931
论文题名: Spring soil moisture-precipitation feedback in the Southern Great Plains: How is it related to large-scale atmospheric conditions?
作者: Su H. ; Yang Z.-L. ; Dickinson R.E. ; Wei J.
刊名: Geophysical Research Letters
ISSN: 0094-10339
EISSN: 1944-10070
出版年: 2014
卷: 41, 期: 4 起始页码: 1283
结束页码: 1289
语种: 英语
英文关键词: land-atmosphere interaction
; precipitation
; soil moisture-precipitation feedback
; Southern Great Plains
Scopus关键词: Landforms
; Precipitation (chemical)
; Soil moisture
; Troposphere
; Velocity
; Atmospheric circulation
; Atmospheric conditions
; Atmospheric dynamics
; Land-atmosphere interactions
; Moisture conditions
; Regional climate modeling
; Southern great plains
; Tropospheric moisture
; Atmospheric structure
; annual variation
; climate modeling
; disturbance
; eddy
; evapotranspiration
; moisture content
; precipitation (climatology)
; regional climate
; soil moisture
; Great Plains
英文摘要: The Southern Great Plains (SGP) has been shown as a region of significant soil moisture-precipitation (S-P) coupling. However, how strong evapotranspiration (ET) can affect regional precipitation remains largely unclear, impeding a full grasp of the S-P feedback in that area. The current study seeks to unravel, in a spring month (April), the potential role played by large-scale atmospheric conditions in shaping S (ET)-P feedback. Our regional climate modeling experiments demonstrate that the presence of anomalous low (high) pressure and cyclonic (anticyclonic) flows at the upper/middle troposphere over the relevant areas is associated with strongest (minimum) positive S-P feedback in the SGP. Their impacts are interpreted in terms of large-scale atmospheric dynamical disturbance, including the intensity and location of synoptic eddies. Further analyses of the vertical velocity fields corroborate these interpretations. In addition, the relationship between lower tropospheric moisture conditions (including winds) and feedback composites is evaluated. Key Points The S-P feedback strength in SGP in April varies inter-annually The atmospheric dynamic features affect significantly the feedback strength composite moisture conditions are related to atmospheric circulation structure ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84894246973&doi=10.1002%2f2013GL058931&partnerID=40&md5=20500b8c7391bc3fe6514fe3da98fa97
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7603
Appears in Collections: 气候减缓与适应
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作者单位: Department of Geological Sciences, John A. and Katherine G. Jackson School of Geosciences, University of Texas at Austin, Austin TX, United States
Recommended Citation:
Su H.,Yang Z.-L.,Dickinson R.E.,et al. Spring soil moisture-precipitation feedback in the Southern Great Plains: How is it related to large-scale atmospheric conditions?[J]. Geophysical Research Letters,2014-01-01,41(4).