气候变化领域集成服务门户(CCPortal): Delayed impact of Indian Ocean warming on the East Asian surface temperature variation in boreal summer

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DOI	10.1175/JCLI-D-20-0691.1
	Delayed impact of Indian Ocean warming on the East Asian surface temperature variation in boreal summer
	Kim S.; Kug J.-S.
发表日期	2021
ISSN	08948755
起始页码	3255
结束页码	3270
卷号	34 期号:8
英文摘要	A significant negative relationship is found between the summer mean north Indian Ocean sea surface temperature (SST) and East Asian surface temperature anomalies. However, the relationship is distinctively different for each month and shows a time-lagged relation rather than a simultaneous one. The north Indian Ocean warming in June is responsible for significant cold anomalies over the region of the Korean Peninsula and Japan (KJ region) that peak in July, exhibiting a 1-month leading role. The SST increase is closely associated with enhanced convective activity in the region in June, but the relationship between SST and resultant precipitation is substantially weakened afterward. This dependency of the precipitation sensitivity on SST anomalies is related to the climatological evolution of SST. The relatively low background SST due to the strengthening of southwesterlymonsoons in the late summer can weaken the sensitivity of the precipitation to SST anomalies, yet the background SST in June is strong enough to maintain an increased sensitivity of precipitation. Thus, the Indian Ocean warming in June effectively drives atmospheric Kelvin waves that propagate into the equatorial western Pacific. In the western North Pacific (WNP), the resultant Kelvin wave-induced Ekman divergence triggers suppressed convection and anticyclonic anomalies. The WNP suppressed convection and anticyclonic anomalies move slowly northeastward until they are located near 208N through the local air-sea interaction, and act as a source of the Pacific-Japan teleconnection. This teleconnection pathway brings clod surface anomalies to the KJ region due to the cyclonic circulation that causes the radiative and horizontal advection. © 2021 American Meteorological Society.
英文关键词	Atmosphere-ocean interaction; Indian Ocean; Summer/warm season; Teleconnections
语种	英语
scopus关键词	Atmospheric temperature; Gravity waves; Surface properties; Surface waters; Air sea interactions; Anticyclonic anomalies; Cyclonic circulation; Horizontal advection; Sea surface temperature (SST); Surface temperature anomalies; Surface temperature variation; Western North Pacific; Oceanography
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178583
作者单位	Division of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, South Korea
推荐引用方式 GB/T 7714	Kim S.,Kug J.-S.. Delayed impact of Indian Ocean warming on the East Asian surface temperature variation in boreal summer[J],2021,34(8).
APA	Kim S.,&Kug J.-S..(2021).Delayed impact of Indian Ocean warming on the East Asian surface temperature variation in boreal summer.Journal of Climate,34(8).
MLA	Kim S.,et al."Delayed impact of Indian Ocean warming on the East Asian surface temperature variation in boreal summer".Journal of Climate 34.8(2021).