DOI: 10.1175/JCLI-D-13-00440.1
Scopus记录号: 2-s2.0-84888024441
论文题名: Weakening trend of the tropical easterly jet stream of the boreal summer monsoon season 1950-2009
作者: Abish B. ; Joseph P.V. ; Johannessen O.M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 23 起始页码: 9408
结束页码: 9414
语种: 英语
Scopus关键词: Atmosphere-ocean interactions
; Atmospheric circulation
; Hadley circulation
; Monsoons
; Upper troposphere
; Atmospheric thermodynamics
; Thermal gradients
; Tropics
; Troposphere
; Climate change
; air-sea interaction
; anticyclone
; atmospheric circulation
; climate change
; Hadley cell
; jet stream
; monsoon
; Northern Hemisphere
; summer
; temperature gradient
; troposphere
; China
; Indian Ocean
; Xizang
英文摘要: Recent research has reported that the tropical easterly jet stream (TEJ) of the boreal summer monsoon season is weakening. The analysis herein using 60 yr (1950-2009) of data reveals that this weakening of the TEJ is due to the decreasing trend in the upper tropospheric meridional temperature gradient over the area covered by the TEJ. During this period, the upper troposphere over the equatorial Indian Ocean has warmed due to enhanced deep moist convection associated with the rapid warming of the equatorial Indian Ocean. At the same time, a cooling of the upper troposphere has taken place over the Northern Hemisphere subtropics including the Tibetan anticyclone. The simultaneous cooling of the subtropics and the equatorial heating has caused a decrease in the upper tropospheric meridional thermal gradient. The consequent reduction in the strength of the easterly thermal wind has resulted in the weakening of the TEJ. © 2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51525
Appears in Collections: 气候变化事实与影响
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作者单位: Nansen Environmental Research Centre India, Ravipuram, Kochi, India; Department of Atmospheric Sciences, Cochin University of Science and Technology, Kochi, India; Nansen Environmental and Remote Sensing Center, Nansen Scientific Society, Bergen, Norway
Recommended Citation:
Abish B.,Joseph P.V.,Johannessen O.M.. Weakening trend of the tropical easterly jet stream of the boreal summer monsoon season 1950-2009[J]. Journal of Climate,2013-01-01,26(23)