IOCAS-IR  > 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, Shijian1,2,4,5
2019-02-28
Source PublicationGEOPHYSICAL RESEARCH LETTERS
ISSN0094-8276
Volume46Issue:4Pages:2140-2148
Corresponding AuthorGuan, Cong(congguan@qtho.ac.cn)
AbstractThe 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.
KeywordENSO asymmetry oceanic feedback thermocline feedback discharge recharge oscillator zonal advective feedback
DOI10.1029/2018GL081332
Indexed BySCI
Language英语
Funding ProjectNational 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 Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000461855600027
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/154917
Collection海洋环流与波动重点实验室
Corresponding AuthorGuan, Cong
Affiliation1.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
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
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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