The Adjoint-Based Favorable Winds for the Generation of the Central Pacific El Nin & SIM;o

doi:10.1175/JCLI-D-22-0548.1

IOCAS-IR > 海洋环流与波动重点实验室

	The Adjoint-Based Favorable Winds for the Generation of the Central Pacific El Nin & SIM;o
	Yang, Weisheng 1,2; Liu, Chuanyu 1,3,4; Koehl, Armin 5; Wang, Jin1,2 ; Wang, Xin 6; Wang, Fan1,3,4
	2023-08-01
发表期刊	JOURNAL OF CLIMATE
ISSN	0894-8755
卷号	36 期号:16 页码:5491-5510
通讯作者	Liu, Chuanyu([email protected])
摘要	Central Pacific (CP) El Nino (i.e., CP El Nino) events have occurred more frequently during recent decades. Wind stress patterns are argued to have significant effects on the generation and evolution of CP El Nino. However, the winds differ in different CP El Nino events, making it hard in previous studies to avoid overgeneralizing the timing and location of the winds that indeed matter. In this study, the theoretically favorable wind perturbations (FWPs) that may warm the Nino-4 region, in terms of their directions, horizontal structures, and bounds, in each month before the peak month (December) of CP El Ninos are determined, using an adjoint sensitivity method. The mechanisms of the FWPs are interpreted. Primarily, zonal temperature advection via the equatorial wave-associated velocity anomalies is re-sponsible. In particular, easterly FWPs over the central equatorial Pacific with off-equatorial westerly FWPs (constituting a wind structure with a strong north-south gradient) during the first half year can play a positive role in warming the Nino-4 region and so can the westerly FWPs over the western tropical Pacific, while westerly FWPs in the western-central tropical Pacific in the second half year show higher efficiency. Meanwhile, the particular wind structure of the first half year (i.e., the easterly anomaly over the central equatorial Pacific with strong wind stress curl off the equator) has also been verified to be able to produce a CP-type warming in an intermediate coupled model (ICM); similar wind stress anomalies had been observed in some CP El Nino events. Thus, the FWPs provide helpful guidance in analyzing the generation and evolving processes of the wind-driven CP El Nino.
关键词	Advection Kelvin waves Ocean dynamics Rossby waves Wind stress El Nino
DOI	10.1175/JCLI-D-22-0548.1
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[41730534]; National Natural Science Foundation of China[41976012]; National Natural Science Foundation of China[42090044]; Strategic Priority Research Program of Chinese Academy of Sciences (CAS)[XDB42000000]; Strategic Priority Research Program of Chinese Academy of Sciences (CAS)[XDA19060102]
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:001032851800001
出版者	AMER METEOROLOGICAL SOC
WOS关键词	SEA-SURFACE TEMPERATURE ; NINO-SOUTHERN-OSCILLATION ; CIRCULATION MODEL ; EASTERN-PACIFIC ; WARM POOL ; OCEAN ; ATLANTIC ; EVENTS ; VARIABILITY
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/182563
专题	海洋环流与波动重点实验室
通讯作者	Liu, Chuanyu
作者单位	1.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Pilot Natl Lab Marine Sci & Technol Qingdao, Marine Dynam Proc & Climate Funct Lab, Qingdao, Peoples R China 4.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China 5.Univ Hamburg, Ctr Earth Syst Res & Sustainabil, Hamburg, Germany 6.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Peoples R China
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
推荐引用方式 GB/T 7714	Yang, Weisheng,Liu, Chuanyu,Koehl, Armin,et al. The Adjoint-Based Favorable Winds for the Generation of the Central Pacific El Nin & SIM;o[J]. JOURNAL OF CLIMATE,2023,36(16):5491-5510.
APA	Yang, Weisheng,Liu, Chuanyu,Koehl, Armin,Wang, Jin,Wang, Xin,&Wang, Fan.(2023).The Adjoint-Based Favorable Winds for the Generation of the Central Pacific El Nin & SIM;o.JOURNAL OF CLIMATE,36(16),5491-5510.
MLA	Yang, Weisheng,et al."The Adjoint-Based Favorable Winds for the Generation of the Central Pacific El Nin & SIM;o".JOURNAL OF CLIMATE 36.16(2023):5491-5510.