DOI: 10.1175/JCLI-D-14-00344.1
Scopus记录号: 2-s2.0-84922794016
论文题名: The forcing of Southwestern Asia teleconnections by low-frequency sea surface temperature variability during boreal winter
作者: Hoell A. ; Funk C. ; Barlow M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 4 起始页码: 1511
结束页码: 1526
语种: 英语
Scopus关键词: Arid regions
; Atmospheric temperature
; Climate models
; Orthogonal functions
; Rain
; Submarine geophysics
; Surface properties
; Surface waters
; Empirical Orthogonal Function
; Interannual time scale
; Land surface hydrology
; Precipitation patterns
; Sea surface temperature (SST)
; Sea surface temperature variability
; Surface temperatures
; Tropospheric circulation
; Oceanography
; air-sea interaction
; annual variation
; atmosphere-ocean coupling
; atmospheric modeling
; climate forcing
; climate modeling
; precipitation assessment
; rainfall
; sea surface temperature
; seasonal variation
; semiarid region
; teleconnection
; temperature gradient
; winter
; Afghanistan
; Iran
; Iraq
; Pakistan
英文摘要: Southwestern Asia, defined here as the domain bounded by 20°-40°N and 40°-70°E, which includes the nations of Iraq, Iran, Afghanistan, and Pakistan, is a water-stressed and semiarid region that receives roughly 75% of its annual rainfall during November-April. The November-April climate of southwestern Asia is strongly influenced by tropical Indo-Pacific variability on intraseasonal and interannual time scales, much of which can be attributed to sea surface temperature (SST) variations. The influences of lower-frequency SST variability on southwestern Asia climate during November-April Pacific decadal SST (PDSST) variability and the long-term trend in SST (LTSST) is examined. The U.S. Climate Variability and Predictability Program (CLIVAR) Drought Working Group forced global atmospheric climate models with PDSST and LTSST patterns, identified using empirical orthogonal functions, to show the steady atmospheric response to these modes of decadal to multidecadal SST variability. During November-April, LTSST forces an anticyclone over southwestern Asia, which results in reduced precipitation and increases in surface temperature. The precipitation and tropospheric circulation influences of LTSST are corroborated by independent observed precipitation and circulation datasets during 1901-2004. The decadal variations of southwestern Asia precipitation may be forced by PDSST variability, with two of the three models indicating that the cold phase of PDSST forces an anticyclone and precipitation reductions. However, there are intermodel circulation variations to PDSST that influence subregional precipitation patterns over the Middle East, southwestern Asia, and subtropical Asia. Changes in wintertime temperature and precipitation over southwestern Asia forced by LTSST and PDSST imply important changes to the land surface hydrology during the spring and summer. © 2015 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50565
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Geography, University of California, Santa Barbara, Santa Barbara, CA, United States; U.S. Geological Survey, and Department of Geography, University of California, Santa Barbara, Santa Barbara, CA, United States; Department of Environmental, Earth, and Atmospheric Sciences, University of Massachusetts, Lowell, MA, United States
Recommended Citation:
Hoell A.,Funk C.,Barlow M.. The forcing of Southwestern Asia teleconnections by low-frequency sea surface temperature variability during boreal winter[J]. Journal of Climate,2015-01-01,28(4)