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

doi:10.1175/JCLI-D-19-0239.1

IOCAS-IR > 海洋环流与波动重点实验室

	New Indices for Better Understanding ENSO by Incorporating Convection Sensitivity to Sea Surface Temperature
	Xie, Ruihuang1,2,3 ; Mu, Mu 4,5; Fang, Xianghui 4,5
	2020-08-15
发表期刊	JOURNAL OF CLIMATE
ISSN	0894-8755
卷号	33 期号:16 页码:7045-7061
通讯作者	Mu, Mu(mumu@fudan.edu.cn)
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.
DOI	10.1175/JCLI-D-19-0239.1
收录类别	SCI
语种	英语
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
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000589972600016
出版者	AMER METEOROLOGICAL SOC
引用统计	被引频次：15[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/337002/169415
专题	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, Inst Oceanol, CAS Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 2.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao, Peoples R China 3.Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Ocean & Climate Dynam, Qingdao, Peoples R China 4.Fudan Univ, Dept Atmospher & Ocean Sci, Shanghai, Peoples R China 5.Fudan Univ, Inst Atmospher Sci, Shanghai, Peoples R China
第一作者单位	中国科学院海洋研究所; 中国科学院海洋大科学研究中心
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.

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文件名称/大小	文献类型	版本类型	开放类型	使用许可
Temperature.pdf（3002KB）	期刊论文	出版稿	限制开放	CC BY-NC-SA	浏览