DOI: 10.1175/JCLI-D-14-00612.1
Scopus记录号: 2-s2.0-84944036211
论文题名: Interannual variability in the large-scale dynamics of the South Asian summer monsoon
作者: Walker J.M. ; Bordoni S. ; Schneider T.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 9 起始页码: 3731
结束页码: 3750
语种: 英语
Scopus关键词: Budget control
; Regression analysis
; Atmospheric circulation
; Interannual variability
; Large scale motion
; Meridional overturning circulations
; Monsoons
; Teleconnections
; Atmospheric thermodynamics
; annual variation
; atmospheric circulation
; atmospheric dynamics
; meridional circulation
; monsoon
; summer
; teleconnection
英文摘要: This study identifies coherent and robust large-scale atmospheric patterns of interannual variability of the South Asian summer monsoon (SASM) in observational data. A decomposition of the water vapor budget into dynamic and thermodynamic components shows that interannual variability of SASM net precipitation (P - E) is primarily caused by variations in winds rather than in moisture. Linear regression analyses reveal that strong monsoons are distinguished from weak monsoons by a northward expansion of the cross-equatorial monsoonal circulation, with increased precipitation in the ascending branch. Interestingly, and in disagreement with the view of monsoons as large-scale sea-breeze circulations, strong monsoons are associated with a decreased meridional gradient in the near-surface atmospheric temperature in the SASM region. Teleconnections exist from the SASM region to the Southern Hemisphere, whose midlatitude poleward eddy energy flux correlates with monsoon strength. Possible implications of these teleconnection patterns for understanding SASM interannual variability are discussed. © 2015 American Meteorological Society. 资助项目: NSF, National Science Foundation
; NSF, National Science Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50612
Appears in Collections: 气候变化事实与影响
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作者单位: California Institute of Technology, Pasadena, CA, United States; Department of Earth Sciences, ETH Zurich, Zurich, Switzerland
Recommended Citation:
Walker J.M.,Bordoni S.,Schneider T.. Interannual variability in the large-scale dynamics of the South Asian summer monsoon[J]. Journal of Climate,2015-01-01,28(9)