Indian Ocean Basin Warming in 2020 Forced by Thermocline Anomalies of the 2019 Indian Ocean Dipole

doi:10.1175/JCLI-D-22-0741.1

IOCAS-IR > 海洋环流与波动重点实验室

	Indian Ocean Basin Warming in 2020 Forced by Thermocline Anomalies of the 2019 Indian Ocean Dipole
	Wang, Jing1,2,3 ; Zhang, Shouwen 4; Jiang, Hua 5; Yuan, Dongliang2,3,6,7
	2024
发表期刊	JOURNAL OF CLIMATE
ISSN	0894-8755
卷号	37 期号:1 页码:145-163
通讯作者	Zhang, Shouwen([email protected]) ; Yuan, Dongliang([email protected])
摘要	The Indian Ocean basin (IOB) mode is the dominant mode of the interannual sea surface temperature (SST) variability in the Indian Ocean, with the Indian Ocean dipole (IOD) as the second mode. An IOB event normally occurs after an El Nino or a concurrent IOD-El Nino event, the dynamics of which are traditionally believed as forced by ENSO through the Walker circulation anomalies over the tropical Indian Ocean. A strong IOB in 2020 took place after the strongest 2019 IOD on record but independent of El Nino, which challenges the traditional atmospheric bridge dynam-ics of the IOB event. In this study, the dynamics of the 2020 IOB event are investigated using the numerical seasonal cli-mate prediction system of the National Marine Environmental Forecasting Center of China. It is found that the initialization of the Indian Ocean subsurface temperature during the 2019 IOD event has led to the outburst of the 2020 IOB event successfully, the dynamics of which are the propagation and the western boundary reflection of the equatorial and off-equatorial Rossby waves, inducing heat content recharge over the tropical Indian Ocean upper thermocline. In comparison, experi-ments of SST initialization over the tropical Indian Ocean, with the subsurface temperature in a climatological state, were unable to reproduce the onset of the 2020 IOB event, suggesting that the local air-sea interaction within the Indian Ocean basin is of sec-ondary importance. The numerical experiments suggest that the thermocline ocean wave dynamics play an important role in forc-ing the IOB event. The revealed thermocline dynamics are potentially useful in climate prediction associated with IOB events.
关键词	Indian Ocean Oceanic waves ENSO Seasonal forecasting Data assimilation Tropical variability
DOI	10.1175/JCLI-D-22-0741.1
收录类别	SCI
语种	英语
资助项目	Laoshan Laboratory[LSKJ202202704]; Laoshan Laboratory[LSKJ202201904]; Natural Science Foundation of China (NSFC)[92258301]; National Key R&D Program of China[2019YFA0606702]; National Key R&D Program of China[2020YFA0608800]; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42000000]; NSFC[41776011]; Taishan Scholar Program of the Shandong Province; Kunpeng Outstanding Scholar Program of the FIO/MNR of China; Oceanographic Data Center, IOCAS
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:001124090900001
出版者	AMER METEOROLOGICAL SOC
WOS关键词	SEA-LEVEL VARIATIONS ; EL-NINO ; ATMOSPHERIC BRIDGE ; TROPICAL PACIFIC ; SST ANOMALIES ; ENSO ; CLIMATE ; DYNAMICS ; EVENTS ; MODE
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/184095
专题	海洋环流与波动重点实验室
通讯作者	Zhang, Shouwen; Yuan, Dongliang
作者单位	1.Chinese Acad Sci, Inst Oceanol, Ctr Ocean Mega Sci, CAS Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 2.Laoshan Lab, Qingdao 266580, Shandong, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai, Peoples R China 5.Minist Nat Resources, Natl Marine Environm Forecasting Ctr, Beijing, Peoples R China 6.Minist Nat Resources, Inst Oceanog 1, Key Lab Marine & Numer Modeling, Qingdao, Peoples R China 7.Shandong Key Lab Marine Sci & Numer Modeling, Qingdao, Peoples R China
第一作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Wang, Jing,Zhang, Shouwen,Jiang, Hua,et al. Indian Ocean Basin Warming in 2020 Forced by Thermocline Anomalies of the 2019 Indian Ocean Dipole[J]. JOURNAL OF CLIMATE,2024,37(1):145-163.
APA	Wang, Jing,Zhang, Shouwen,Jiang, Hua,&Yuan, Dongliang.(2024).Indian Ocean Basin Warming in 2020 Forced by Thermocline Anomalies of the 2019 Indian Ocean Dipole.JOURNAL OF CLIMATE,37(1),145-163.
MLA	Wang, Jing,et al."Indian Ocean Basin Warming in 2020 Forced by Thermocline Anomalies of the 2019 Indian Ocean Dipole".JOURNAL OF CLIMATE 37.1(2024):145-163.