DOI: 10.1007/s00382-012-1360-x
Scopus记录号: 2-s2.0-84865581873
论文题名: What drives the global summer monsoon over the past millennium?
作者: Liu J. ; Wang B. ; Yim S.-Y. ; Lee J.-Y. ; Jhun J.-G. ; Ha K.-J.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2012
卷: 39, 期: 5 起始页码: 1063
结束页码: 1072
语种: 英语
英文关键词: Centennial time scale
; Global summer monsoon precipitation
; Multi-decadal time scale
; Northern hemisphere summer monsoon precipitation
; Past millennium
; Southern hemisphere summer monsoon precipitation
英文摘要: The global summer monsoon precipitation (GSMP) provides a fundamental measure for changes in the annual cycle of the climate system and hydroclimate. We investigate mechanisms governing decadal-centennial variations of the GSMP over the past millennium with a coupled climate model's (ECHO-G) simulation forced by solar-volcanic (SV) radiative forcing and greenhouse gases (GHG) forcing. We show that the leading mode of GSMP is a forced response to external forcing on centennial time scale with a globally uniform change of precipitation across all monsoon regions, whereas the second mode represents internal variability on multi-decadal time scale with regional characteristics. The total amount of GSMP varies in phase with the global mean temperature, indicating that global warming is accompanied by amplification of the annual cycle of the climate system. The northern hemisphere summer monsoon precipitation (NHSMP) responds to GHG forcing more sensitively, while the southern hemisphere summer monsoon precipitation (SHSMP) responds to the SV radiative forcing more sensitively. The NHSMP is enhanced by increased NH land-ocean thermal contrast and NH-minus-SH thermal contrast. On the other hand, the SHSMP is strengthened by enhanced SH subtropical highs and the east-west mass contrast between Southeast Pacific and tropical Indian Ocean. The strength of the GSMP is determined by the factors controlling both the NHSMP and SHSMP. Intensification of GSMP is associated with (a) increased global land-ocean thermal contrast, (b) reinforced east-west mass contrast between Southeast Pacific and tropical Indian Ocean, and (c) enhanced circumglobal SH subtropical highs. The physical mechanisms revealed here will add understanding of future change of the global monsoon. © 2012 The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/55172
Appears in Collections: 过去全球变化的重建
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作者单位: State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 73 East Beijing Road, Nanjing 210008, China; Department of Meteorology, University of Hawaii at Manoa, Honolulu, HI 96825, United States; International Pacific Research Center, University of Hawaii at Manoa, Honolulu, HI 96825, United States; School of Earth and Environmental Sciences/Research Institute of Oceanography, Seoul National University, Seoul 151-747, South Korea; Division of Earth Environmental System, Pusan National University, Busan 609-735, South Korea
Recommended Citation:
Liu J.,Wang B.,Yim S.-Y.,et al. What drives the global summer monsoon over the past millennium?[J]. Climate Dynamics,2012-01-01,39(5)