DOI: 10.1007/s00382-011-1266-z
Scopus记录号: 2-s2.0-84863386361
论文题名: Recent change of the global monsoon precipitation (1979-2008)
作者: Wang B. ; Liu J. ; Kim H.-J. ; Webster P.J. ; Yim S.-Y.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2012
卷: 39, 期: 5 起始页码: 1123
结束页码: 1135
语种: 英语
英文摘要: The global monsoon (GM) is a defining feature of the annual variation of Earth's climate system. Quantifying and understanding the present-day monsoon precipitation change are crucial for prediction of its future and reflection of its past. Here we show that regional monsoons are coordinated not only by external solar forcing but also by internal feedback processes such as El Niño-Southern Oscillation (ENSO). From one monsoon year (May to the next April) to the next, most continental monsoon regions, separated by vast areas of arid trade winds and deserts, vary in a cohesive manner driven by ENSO. The ENSO has tighter regulation on the northern hemisphere summer monsoon (NHSM) than on the southern hemisphere summer monsoon (SHSM). More notably, the GM precipitation (GMP) has intensified over the past three decades mainly due to the significant upward trend in NHSM. The intensification of the GMP originates primarily from an enhanced east-west thermal contrast in the Pacific Ocean, which is coupled with a rising pressure in the subtropical eastern Pacific and decreasing pressure over the Indo-Pacific warm pool. While this mechanism tends to amplify both the NHSM and SHSM, the stronger (weaker) warming trend in the NH (SH) creates a hemispheric thermal contrast, which favors intensification of the NHSM but weakens the SHSM. The enhanced Pacific zonal thermal contrast is largely a result of natural variability, whilst the enhanced hemispherical thermal contrast is likely due to anthropogenic forcing. We found that the enhanced global summer monsoon not only amplifies the annual cycle of tropical climate but also promotes directly a "wet-gets-wetter" trend pattern and indirectly a "dry-gets-drier" trend pattern through coupling with deserts and trade winds. The mechanisms recognized in this study suggest a way forward for understanding past and future changes of the GM in terms of its driven mechanisms. © 2011 The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/55200
Appears in Collections: 过去全球变化的重建
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作者单位: 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; 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; Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology, 3173-25 Showa-machi, Kanazawa-ku, Yokohama, Kanagawa 236-0001, Japan; School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA 30308, United States
Recommended Citation:
Wang B.,Liu J.,Kim H.-J.,et al. Recent change of the global monsoon precipitation (1979-2008)[J]. Climate Dynamics,2012-01-01,39(5)