Responses of East Asian Climate to SST Anomalies in the Kuroshio Extension Region during Boreal Autumn

doi:10.1175/JCLI-D-21-0711.1

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋环流与波动重点实验室

	Responses of East Asian Climate to SST Anomalies in the Kuroshio Extension Region during Boreal Autumn
	Geng, Yu 1; Ren, Hong-Li 1,2; Ma, Xueying 3,4; Zhao, Shuo 1; Nie, Yu 5
刊名	JOURNAL OF CLIMATE
	2022-11-01
卷号	35 期号:21 页码:3407-3423
关键词	Atmosphere-ocean interaction Atmospheric circulation Climate prediction
ISSN号	0894-8755
DOI	10.1175/JCLI-D-21-0711.1
通讯作者	Ren, Hong-Li(renhl@cma.gov.cn)
英文摘要	Sea surface temperature anomalies (SSTAs) in the Kuroshio Extension (KE) region play a key role in influencing midlatitude climate variations. This study investigates the impacts of SSTAs in the KE region (KE-SSTA) on East Asian climate during boreal autumn. The results reveal that positive KE-SSTA, changing the meridional temperature gradient in the lower troposphere, contributes to the formation of an anomalous quasi-barotropic anticyclonic circulation (AC) over the KE region. Such a configuration tends to be affected by wind through thermal wind adjustment. Simultaneously, it is also impacted by eddy activity related to the strengthened atmospheric baroclinicity through transient eddy feedback. By both means, obvious descending motion and warm advection are generated, which increases tropospheric temperature through adiabatic heating and further maintains the abnormal AC over the KE region. This anomalous circulation changes wind in the east of the East Asian trough, which favors the transportation of warm and wet air from the midlatitude northwest Pacific and further causes the increase of temperature in northeastern East Asia. Moreover, it also leads to the convergence and divergence of water vapor fluxes in Northeast Asia and eastern North China, favoring the increase and decrease of precipitation in the two regions, respectively. The above responsive characteristics of the midlatitude atmospheric circulation to positive KE-SSTA can be confirmed by numerical experiments. These results suggest that anomalous SST in the KE region can be used as a potentially effective predictability source for autumn climate variations in the mid- to high latitudes of East Asia. Significance StatementAnomalous variations of sea surface temperature (SST) in the Kuroshio Extension (KE) region play an essential role in influencing midlatitude climate variations. Considering the importance of autumn climate in East Asia to agricultural production, this study aims to explore the relationship between the East Asian climate and autumn SST anomaly in the KE region (KE-SSTA), and to understand how KE-SSTA effects East Asian climate during boreal autumn. Our results suggest that KE-SSTA can be used as one of the effective predictors of East Asian climate, which will contribute to the improvement of short-term climate prediction levels over East Asia.
资助项目	National Key Research and Development Program of China[2018YFC1506000] ; National Natural Science Foundation of China[42106036] ; National Natural Science Foundation of China[42175075] ; Basic Research and Operational Special Project of CAMS[2021Z007] ; Advanced Computing East China Sub-center
WOS研究方向	Meteorology & Atmospheric Sciences
语种	英语
出版者	AMER METEOROLOGICAL SOC
WOS记录号	WOS:000878871800008
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/180449]
专题	海洋研究所_海洋环流与波动重点实验室
通讯作者	Ren, Hong-Li
作者单位	1.Chinese Acad Meteorol Sci, Inst Tibetan Plateau Meteorol, State Key Lab Severe Weather, Beijing, Peoples R China 2.Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteorol, Nanjing, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Ocean Circulat & Waves c, Qingdao, Peoples R China 4.Univ Chinese Acad Sci, Beijing, Peoples R China 5.China Meteorol Adm, Lab Climate Studies & CMA NJU Joint Lab Climate Pr, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Geng, Yu,Ren, Hong-Li,Ma, Xueying,et al. Responses of East Asian Climate to SST Anomalies in the Kuroshio Extension Region during Boreal Autumn[J]. JOURNAL OF CLIMATE,2022,35(21):3407-3423.
APA	Geng, Yu,Ren, Hong-Li,Ma, Xueying,Zhao, Shuo,&Nie, Yu.(2022).Responses of East Asian Climate to SST Anomalies in the Kuroshio Extension Region during Boreal Autumn.JOURNAL OF CLIMATE,35(21),3407-3423.
MLA	Geng, Yu,et al."Responses of East Asian Climate to SST Anomalies in the Kuroshio Extension Region during Boreal Autumn".JOURNAL OF CLIMATE 35.21(2022):3407-3423.