DOI: 10.1002/2016GL071026
论文题名: Onset and withdrawal of the large-scale South Asian monsoon: A dynamical definition using change point detection
作者: Walker J.M. ; Bordoni S.
刊名: Geophysical Research Letters
ISSN: 0094-8404
EISSN: 1944-8135
出版年: 2016
卷: 43, 期: 22 起始页码: 11815
结束页码: 11822
语种: 英语
英文关键词: monsoon
; onset
Scopus关键词: Budget control
; Moisture
; Precipitation (meteorology)
; Asian summer monsoons
; Atmospheric moisture
; Change point detection
; Hadley circulation
; monsoon
; Objective definition
; onset
; Regional variability
; Atmospheric thermodynamics
; Chandipura virus
英文摘要: We introduce an objective definition for onset and withdrawal of the South Asian summer monsoon (SASM), based on the large-scale atmospheric moisture budget. The change point (CHP) index allows precise characterization of the different stages and timescales of the large-scale SASM and is highly correlated with the local operational index, the monsoon onset over Kerala. The CHP-based onset and withdrawal dates, which capture the expected seasonal transitions in rainfall and winds, correspond with regime changes in the SASM moisture budget between negative and positive net precipitation. Climatological composites reveal that the seasonal transitions in SASM sector mean precipitation and circulation closely resemble those of the zonal mean Hadley circulation. The CHP index at grid points within the SASM domain yields a robust definition of local onset and withdrawal dates, which are well correlated with the large-scale index on interannual timescales, providing insight into the regional variability of the SASM. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85004024968&doi=10.1002%2f2016GL071026&partnerID=40&md5=3800a7fab8139d19d7598a6048193a24
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9367
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Environmental Science and Engineering, California Institute of Technology, Pasadena, CA, United States
Recommended Citation:
Walker J.M.,Bordoni S.. Onset and withdrawal of the large-scale South Asian monsoon: A dynamical definition using change point detection[J]. Geophysical Research Letters,2016-01-01,43(22).