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New Indices for Better Understanding ENSO by Incorporating Convection Sensitivity to Sea Surface Temperature

文献类型：期刊论文

作者Xie, Ruihuang1,2,5; Mu, Mu3,4; Fang, Xianghui3,4
刊名JOURNAL OF CLIMATE
出版日期2020-08-15
卷号33期号:16页码:7045-7061
ISSN号0894-8755
DOI10.1175/JCLI-D-19-0239.1
通讯作者Mu, Mu(mumu@fudan.edu.cn)
英文摘要Observed outgoing longwave radiation (OLR) data indicate that convection is nonlinearly sensitive to sea surface temperature anomalies (SSTA) for background SSTs in the 25.25 degrees-30.25 degrees C high-impact range. In this study, we use that observed convection sensitivity to derive a proxy of the convective responses to SSTA only [referred to as fluctuations of the accumulated convection strength (FACT)]. FACT reproduces the pattern of the observed convection response to ENSO in the central and eastern Pacific, but underestimates the amplitude due to the exclusion of the effect of ENSO-induced atmospheric convergence anomalies on convection. We thus use FACT to define new indices (InFACT) of ENSO diversity that explicitly account for the nonlinear convection-SST sensitivity. The amplitude of InFACT allows us to easily classify El Nifio events into weak, moderate, and strong types that markedly differ in terms of SSTA spatial patterns and their convective responses. La Nina events classified by InFACT display much less pattern diversity, and mostly differ through their amplitudes. Finally, our study supports some previous studies that the nonlinear SST-convection relation plays a strong role for the development of extreme El Nino events with the presence of high-impact SSTs and large convection anomalies in the equatorial eastern Pacific.
资助项目National Programme on Global Change and Air-Sea Interaction[GASI-IPOVAI-06] ; National Natural Science Foundation of China (NSFC)[41676007] ; National Natural Science Foundation of China (NSFC)[41976015] ; NSFC-Shandong Joint Fund for Marine Science Research Centers[U1406402] ; NSFC[41230420]
WOS研究方向Meteorology & Atmospheric Sciences
语种英语
出版者AMER METEOROLOGICAL SOC
WOS记录号WOS:000589972600016
源URL[http://ir.qdio.ac.cn/handle/337002/169414]  
专题海洋研究所_海洋环流与波动重点实验室
通讯作者Mu, Mu
作者单位1.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao, Peoples R China
2.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China
3.Fudan Univ, Inst Atmospher Sci, Shanghai, Peoples R China
4.Fudan Univ, Dept Atmospher & Ocean Sci, Shanghai, Peoples R China
5.Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Ocean & Climate Dynam, Qingdao, Peoples R China
推荐引用方式
GB/T 7714		 Xie, Ruihuang,Mu, Mu,Fang, Xianghui. New Indices for Better Understanding ENSO by Incorporating Convection Sensitivity to Sea Surface Temperature[J]. JOURNAL OF CLIMATE,2020,33(16):7045-7061.
APA Xie, Ruihuang,Mu, Mu,&Fang, Xianghui.(2020).New Indices for Better Understanding ENSO by Incorporating Convection Sensitivity to Sea Surface Temperature.JOURNAL OF CLIMATE,33(16),7045-7061.
MLA Xie, Ruihuang,et al."New Indices for Better Understanding ENSO by Incorporating Convection Sensitivity to Sea Surface Temperature".JOURNAL OF CLIMATE 33.16(2020):7045-7061.

入库方式： OAI收割

来源：海洋研究所

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