DOI: 10.1175/JCLI-D-16-0501.1
Scopus记录号: 2-s2.0-85013994915
论文题名: Understanding the variations of the length and the seasonal rainfall anomalies of the indian summer monsoon
作者: Misra V. ; Bhardwaj A. ; Noska R.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 5 起始页码: 1753
结束页码: 1763
语种: 英语
Scopus关键词: Atmospheric movements
; Atmospheric thermodynamics
; Climate change
; Rain
; Canonical behavior
; Canonical relationships
; Eastern equatorial Pacific
; Indian summer monsoon
; Meridional temperature gradient
; Moist static energy
; Northern indian oceans
; Ocean heat transport
; Oceanography
; air-sea interaction
; climate forcing
; El Nino-Southern Oscillation
; monsoon
; precipitation intensity
; rainfall
; sea surface temperature
; seasonal variation
; summer
; temperature anomaly
; India
; Indian Ocean
; Indian Ocean (North)
; Pacific Ocean
; Pacific Ocean (East)
; Pacific Ocean (Equatorial)
英文摘要: The canonical relationship between the length and the total seasonal rainfall anomalies of the Indian summer monsoon (ISM) is the association of the longer (shorter) season with wetter (drier) seasonal rainfall anomalies. This study shows that such canonical behavior is clearly associated with relatively strong ENSO SST anomalies in the eastern equatorial Pacific Ocean that appear in the boreal summer and fall seasons. The noncanonical relationship is caused by a longer (shorter) season associated with drier (wetter) ISM seasonal rainfall anomalies. A majority of these noncanonical seasons, with anomalously short season length but anomalously high seasonal mean rain, tend to occur under relatively weak La Niña forcing during the boreal summer season. Although the onset of such seasons occurs through canonical ENSO forcing of a large-scale meridional temperature gradient, the demise is dictated by the depletion of moist static energy from the underlying cooling of the upper ocean in the northern Indian Ocean. This is due to stronger meridional Ekman ocean heat transport forced by the stronger low-level atmospheric southwesterlies than those in the corresponding canonical wet ISM season. © 2017 American Meteorological Society.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49754
Appears in Collections: 气候变化事实与影响
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作者单位: Center for Ocean-Atmospheric Prediction Studies, Department of Earth, Ocean and Atmospheric Science, Florida Climate Institute, Florida State University, Tallahassee, FL, United States; Center for Ocean-Atmospheric Prediction Studies, Florida Climate Institute, Florida State University, Tallahassee, FL, United States
Recommended Citation:
Misra V.,Bhardwaj A.,Noska R.. Understanding the variations of the length and the seasonal rainfall anomalies of the indian summer monsoon[J]. Journal of Climate,2017-01-01,30(5)