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学科主题: Meteorology & Atmospheric Sciences
题名: An idealized study of the impact of extratropical climate change on El Nino-Southern Oscillation
作者: Zhang, Q ; Yang, HJ ; Zhong, YF ; Wang, DX
通讯作者: hjyang@pku.edu.cn
刊名: CLIMATE DYNAMICS
发表日期: 2005
卷: 25, 期:40732, 页:869-880
收录类别: sci
部门归属: Peking Univ, Sch Phys, Dept Atmospher Sci, Beijing 100871, Peoples R China; Chinese Acad Sci, Inst Atmospher Sci, LASG, Beijing, Peoples R China; Peking Univ, Sch Phys, Lab Severe Storm & Flood Disasters, Beijing 100871, Peoples R China; Univ Wisconsin, Ctr Climat Res, Madison, WI USA; Univ Wisconsin, Dept Atmospher & Ocean Sci, Madison, WI USA; Chinese Acad Sci, S China Sea Inst Oncol, Lab Trop Marine Environm Dynam, Guangzhou, Peoples R China
项目归属: LED
摘要: Extratropical impacts on the tropical El Nino-Southern Oscillation (ENSO) are studied in a coupled climate model. Idealized experiments show that the remote impact of the extratropics on the equatorial thermocline through oceanic tunnel can substantially modulate the ENSO in both magnitude and frequency. First of all, an extratropical warming can be conveyed to the equator by the mean subduction current, resulting in a warming of the equatorial thermocline. Second, the extratropical warming can weaken the Hadley cells, which in turn slow down the mean shallow meridional overturning circulations in the upper Pacific, reducing the equatorward cold water supply and the equatorial upwelling. These oceanic dynamic processes would weaken the stratification of the equatorial thermocline and retard a buildup (purge) of excess heat content along the equator, and finally result in a weaker and longer ENSO cycle. This study highlights a nonlocal mechanism in which ENSO behavior is related to the extratropical climate conditions.
WOS记录号: WOS:000233240800012
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/5689
Appears in Collections:热带海洋环境动力实验室(LTO)_期刊论文

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Zhang, Q; Yang, HJ; Zhong, YF; Wang, DX.An idealized study of the impact of extratropical climate change on El Nino-Southern Oscillation,CLIMATE DYNAMICS,2005,25(40732):869-880
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