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Quantifying the Role of Oceanic Feedbacks on ENSO Asymmetry
Guan, Cong1,2,3,4,5; McPhaden, Michael J.6; Wang, Fan1,2,4,5; Hu, Shijian1,2,4,5
2019-02-28
发表期刊GEOPHYSICAL RESEARCH LETTERS
ISSN0094-8276
卷号46期号:4页码:2140-2148
通讯作者Guan, Cong(congguan@qtho.ac.cn)
摘要The role of oceanic feedbacks in determining the asymmetry of El Nino-Southern Oscillation (ENSO) magnitude, spatial structure, and duration is quantified on the basis of a novel temperature variance budget. Results confirm previous studies that in the eastern Pacific, El Nino warm temperature anomalies are larger in magnitude than La Nina cold temperature anomalies mainly due to stronger positive oceanic feedbacks for El Nino. We find that La Nina cold anomalies are typically stronger than El Nino warm anomalies in the central Pacific with a faster growth rate for cold anomalies, due to a stronger positive thermocline feedback and weaker nonlinear damping. The thermocline feedback related to recharge oscillator dynamics plays a dominate role and leads to asymmetry in the duration of El Nino and La Nina events. In particular, the thermocline feedback becomes significantly negative during the late decaying phase of El Nino and speeds up its demise.
关键词ENSO asymmetry oceanic feedback thermocline feedback discharge recharge oscillator zonal advective feedback
DOI10.1029/2018GL081332
收录类别SCI
语种英语
资助项目Key Research Program of Frontier Sciences, CAS[QYZDB-SSW-SYS023] ; National Program on Global Change and Air-Sea Interaction[GASI-IPOVAI-01-01] ; Qingdao postdoctoral application research project ; China Postdoctoral Science Foundation[2017M622289] ; National Natural Science Foundation of China[41730534] ; National Natural Science Foundation of China[41776018] ; National Natural Science Foundation of China[41776018] ; National Natural Science Foundation of China[41730534] ; China Postdoctoral Science Foundation[2017M622289] ; Qingdao postdoctoral application research project ; National Program on Global Change and Air-Sea Interaction[GASI-IPOVAI-01-01] ; Key Research Program of Frontier Sciences, CAS[QYZDB-SSW-SYS023]
WOS研究方向Geology
WOS类目Geosciences, Multidisciplinary
WOS记录号WOS:000461855600027
出版者AMER GEOPHYSICAL UNION
引用统计
被引频次:24[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.qdio.ac.cn/handle/337002/154917
专题海洋环流与波动重点实验室
通讯作者Guan, Cong
作者单位1.Cninese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China
2.Univ Chinese Acad Sci, Coll Marine Sci, Qingdao, Peoples R China
3.Shandong Acad Sci, Inst Oceanog Instrumentat, Qingdao, Peoples R China
4.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China
5.Qingdao Natl Lab Marine Sci & Technol, Qingdao, Peoples R China
6.NOAA, Pacific Marine Environm Lab, 7600 Sand Point Way Ne, Seattle, WA 98115 USA
第一作者单位中国科学院海洋研究所
通讯作者单位中国科学院海洋研究所
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GB/T 7714
Guan, Cong,McPhaden, Michael J.,Wang, Fan,et al. Quantifying the Role of Oceanic Feedbacks on ENSO Asymmetry[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(4):2140-2148.
APA Guan, Cong,McPhaden, Michael J.,Wang, Fan,&Hu, Shijian.(2019).Quantifying the Role of Oceanic Feedbacks on ENSO Asymmetry.GEOPHYSICAL RESEARCH LETTERS,46(4),2140-2148.
MLA Guan, Cong,et al."Quantifying the Role of Oceanic Feedbacks on ENSO Asymmetry".GEOPHYSICAL RESEARCH LETTERS 46.4(2019):2140-2148.
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