DOI: 10.1002/2014GL061895
论文题名: Has the number of Indian summer monsoon depressions decreased over the last 30 years?
作者: Cohen N.Y. ; Boos W.R.
刊名: Geophysical Research Letters
ISSN: 0094-9584
EISSN: 1944-9315
出版年: 2014
卷: 41, 期: 22 起始页码: 7846
结束页码: 7853
语种: 英语
英文关键词: monsoon depressions
; trend
Scopus关键词: Information retrieval systems
; Meteorological instruments
; Atmospheric vortices
; Bay of Bengal
; Indian summer monsoon
; Monsoon circulations
; Monsoon depressions
; Reanalysis
; Satellite scatterometers
; trend
; Atmospheric thermodynamics
; monsoon
; satellite data
; satellite imagery
; vorticity
; Bay of Bengal
; India
; Indian Ocean
英文摘要: Monsoon depressions are cyclonic atmospheric vortices with outer radii near 1000 km that form within the larger-scale monsoon circulations of India and other regions. Recent studies have reported a downward trend in recent decades in the number of Indian summer monsoon depressions. In particular, the years 2002, 2010, and 2012 were noted for having the first summers, in over a century, in which no depressions formed. Here satellite and reanalysis data are used to document the existence of multiple storms in the summers of 2002, 2010, and 2012 that meet traditional criteria for classification as monsoon depressions. Furthermore, the number of extreme synoptic events occurring each summer over the Bay of Bengal is estimated from satellite scatterometers and exhibits no statistically significant trend over the last three decades. These results raise questions about the validity of previously claimed large trends in monsoon depression activity in the Indian summer monsoon. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84923344112&doi=10.1002%2f2014GL061895&partnerID=40&md5=d85b04e6e07d1d3a9a2120ece637c92f
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6848
Appears in Collections: 气候减缓与适应
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作者单位: Department of Geology and Geophysics, Yale University, New Haven, CT, United States
Recommended Citation:
Cohen N.Y.,Boos W.R.. Has the number of Indian summer monsoon depressions decreased over the last 30 years?[J]. Geophysical Research Letters,2014-01-01,41(22).