Seasonal Variation of the Westerly Jet over Asia in the Last Glacial Maximum: Role of the Tibetan Plateau Heating

doi:10.1175/JCLI-D-20-0438.1

IEECAS OpenIR > 古环境研究室

	Seasonal Variation of the Westerly Jet over Asia in the Last Glacial Maximum: Role of the Tibetan Plateau Heating
	Lei, Jing 1; Shi, Zhengguo1,2,3,4 ; Xie, Xiaoning 1; Sha, Yingying 1; Li, Xinzhou1 ; Liu, Xiaodong 1; An, Zhisheng 1
通讯作者	Shi, Zhengguo(shizg@ieecas.cn)
	2021-04-01
发表期刊	JOURNAL OF CLIMATE
ISSN	0894-8755
卷号	34 期号:7 页码:2723-2740
摘要	The westerly jet (WJ) is an important component of atmospheric circulation, which is characterized by prominent seasonal variations in intensity and position. However, the response of the WJ over Asia during the Last Glacial Maximum (LGM) is still not clear. Using general circulation model experiments, the seasonal behaviors of the WJ over central Asia and Japan are analyzed in this paper. The results show that, compared to the present day (PD), the WJ presents a complicated response during the LGM, both in intensity and position. Over central Asia, it becomes weaker in both summer and winter. But over Japan, it is enhanced in summer but becomes diminished in winter. In terms of position, the WJ over central Asia shifts southward in both summer and winter, whereas the WJ over Japan moves southward in summer but does not change obviously relative to PD in winter. Such WJ changes are well explained by meridional temperature gradients in high troposphere, which is closely linked to seasonal thermal anomalies over the Tibetan Plateau (TP). Despite cooler LGM conditions, the anomalous warming center over the TP becomes stronger in summer. Derived from the heat budget equation, the stronger heating center is mainly caused by the weaker adiabatic cooling generated from ascending motion over the area south of the TP. In winter, the cooling over the TP is also strengthened, mostly owing to the subsidence-induced weaker adiabatic heating. Due to the importance of the WJ, the potential role of TP thermal effects should be a focus when explaining the East Asian climate change during the LGM.
关键词	Atmospheric circulation Orographic effects Ice age General circulation models
DOI	10.1175/JCLI-D-20-0438.1
关键词[WOS]	ATMOSPHERIC CIRCULATION ; NUMERICAL-SIMULATION ; RADIATIVE FEEDBACKS ; SUBTROPICAL JET ; MONSOON ONSET ; EAST-ASIA ; ICE-AGE ; CLIMATE ; EVOLUTION ; RAINFALL
收录类别	SCI ; SCI
语种	英语
资助项目	Strategic Priority Research Program of the Chinese Academy of Sciences[XDB40030000] ; National Natural Science Foundation of China[41888101] ; National Natural Science Foundation of China[41977382] ; Youth Innovation Promotion Association CAS
WOS研究方向	Meteorology & Atmospheric Sciences
项目资助者	Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000644142700019
出版者	AMER METEOROLOGICAL SOC
引用统计	被引频次：12[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/16410
专题	古环境研究室第四纪科学与全球变化卓越创新中心
通讯作者	Shi, Zhengguo
作者单位	1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian, Peoples R China 2.Chinese Acad Sci, Ctr Excellence Quaternary Sci & Global Change, Xian, Peoples R China 3.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian, Peoples R China 4.Pilot Natl Lab Marine Sci & Technol, Open Studio Ocean Continental Climate & Environm, Qingdao, Peoples R China
推荐引用方式 GB/T 7714	Lei, Jing,Shi, Zhengguo,Xie, Xiaoning,et al. Seasonal Variation of the Westerly Jet over Asia in the Last Glacial Maximum: Role of the Tibetan Plateau Heating[J]. JOURNAL OF CLIMATE,2021,34(7):2723-2740.
APA	Lei, Jing.,Shi, Zhengguo.,Xie, Xiaoning.,Sha, Yingying.,Li, Xinzhou.,...&An, Zhisheng.(2021).Seasonal Variation of the Westerly Jet over Asia in the Last Glacial Maximum: Role of the Tibetan Plateau Heating.JOURNAL OF CLIMATE,34(7),2723-2740.
MLA	Lei, Jing,et al."Seasonal Variation of the Westerly Jet over Asia in the Last Glacial Maximum: Role of the Tibetan Plateau Heating".JOURNAL OF CLIMATE 34.7(2021):2723-2740.