globalchange  > 气候变化事实与影响
DOI: 10.1175/JCLI-D-13-00369.1
Scopus记录号: 2-s2.0-84897670629
论文题名:
Impact of east asian winter and australian summer monsoons on the enhanced surface westerlies over the western tropical pacific ocean preceding the El Niño onset
作者: Zheng Y.; Zhang R.; Bourassa M.A.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期:5
起始页码: 1928
结束页码: 1944
语种: 英语
Scopus关键词: Atmospheric model ; Australian summer monsoons ; Boreal winters ; Composite analysis ; East Asian winter monsoon ; Enhanced surface ; Model results ; Tropical Pacific ocean ; Climate models ; Climatology ; Atmospheric thermodynamics ; air-sea interaction ; atmospheric modeling ; El Nino ; monsoon ; summer ; westerly ; winter ; Pacific Ocean ; Pacific Ocean (West)
英文摘要: Composite analysis from NCEP-NCAR reanalysis datasets over the period 1948-2007 indicates that stronger East Asian winter monsoons (EAWM) and stronger Australian summer monsoons (ASM) generally coexist in boreal winters preceding the onset of El Niño, although the EAWM tend to be weak after 1990, probably because of the decadal shift of EAWM and the change in El Niño events from cold-tongue type to warm-pool type. The anomalous EAWM and ASM enhance surface westerlies over the western tropical Pacific Ocean (WTP). It is proposed that the enhanced surface westerlies over theWTPprior to El Niño onset are generally associated with the concurrent anomalous EAWM and ASM. A simple analytical atmospheric model is constructed to test the hypothesis that the emergence of enhanced surface westerlies over the WTP can be linked to concurrent EAWM and ASM anomalies. Model results indicate that, when anomalous northerlies from the EAWM converge with anomalous southerlies from the ASM, westerly anomalies over the WTP are enhanced. This result provides a possible explanation of the co-impact of the EAWM and the ASM on the onset of El Niño through enhancing the surface westerly over the WTP. © 2014 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/50914
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作者单位: Center for Ocean-Atmospheric Prediction Studies, The Florida State University, Tallahassee, FL, United States; State Key Laboratory of Severe Weather (LaSW), Chinese Academy of Meteorological Sciences, Beijing, China; Department of Earth, Ocean and Atmospheric Science, The Florida State University, Tallahassee, FL, United States

Recommended Citation:
Zheng Y.,Zhang R.,Bourassa M.A.. Impact of east asian winter and australian summer monsoons on the enhanced surface westerlies over the western tropical pacific ocean preceding the El Niño onset[J]. Journal of Climate,2014-01-01,27(5)
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