Quantifying the Role of Oceanic Feedbacks on ENSO Asymmetry

doi:10.1029/2018GL081332

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋环流与波动重点实验室

	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, Shijian 1,2,4,5
刊名	GEOPHYSICAL RESEARCH LETTERS
	2019-02-28
卷号	46 期号:4 页码:2140-2148
关键词	ENSO asymmetry oceanic feedback thermocline feedback discharge recharge oscillator zonal advective feedback
ISSN号	0094-8276
DOI	10.1029/2018GL081332
通讯作者	Guan, Cong(congguan@qtho.ac.cn)
英文摘要	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.
资助项目	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
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000461855600027
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/154917]
专题	海洋研究所_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
推荐引用方式 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.