干旱区生态环境知识资源中心(Arid): Possible semi-circumglobal teleconnection across Eurasia driven by deep convection over the Sahel

Arid

DOI	10.1007/s00382-021-05804-x
	Possible semi-circumglobal teleconnection across Eurasia driven by deep convection over the Sahel
	Nakanishi, Tomoe; Tachibana, Yoshihiro; Ando, Yuta
通讯作者	Tachibana, Y (corresponding author), Mie Univ, Fac Bioresources, Weather & Climate Dynam Div, 1577 Kurimamachiya Cho, Tsu, Mie 5148507, Japan.
来源期刊	CLIMATE DYNAMICS
ISSN	0930-7575
EISSN	1432-0894
出版年	2021
英文摘要	The Sahel region, located between the tropical rainforests of Africa and the Sahara Desert, has rainfall that varies widely from year to year, associated with extremely deep convection. This deep convection, strongly heated by water vapor condensation, suggests the possibility of exerting a remote influence on mid- and high-latitude climate similar to the well-known influences of tropical oceanic convection on global climate. Here we investigate the possibility that deep convection over the Sahel initiates a semi-circumglobal teleconnection extending to eastern Eurasia. Statistical analysis and numerical experiments support the possible existence of this teleconnection at an interannual time scale. We propose that the anomalous heat source due to deep convection over the Sahel in the late monsoon season influences meandering of the mid-latitude jet stream over Europe through the combination of a Matsuno-Gill response and advection of absolute vorticity. This subtropical jet meander may in turn drive an eastward propagation of a Rossby wave across Eurasia as far as East Asia. Because deep convection over other subtropical land areas may exert a similar remote influence upon extratropical extreme weather, further studies of the influence of overland convection may provide us with an expanded comprehension of teleconnections.
英文关键词	Sahel Convective activity Teleconnection Rossby wave Linear regression
类型	Article ; Early Access
语种	英语
开放获取类型	Other Gold
收录类别	SCI-E
WOS记录号	WOS:000652453700001
WOS关键词	SUMMER CLIMATE ; NORTH-ATLANTIC ; RAINFALL ; PRECIPITATION ; CIRCULATION ; OSCILLATION ; TEMPERATURE ; VARIABILITY ; ATMOSPHERE ; DYNAMICS
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/352106
作者单位	[Nakanishi, Tomoe; Tachibana, Yoshihiro; Ando, Yuta] Mie Univ, Fac Bioresources, Weather & Climate Dynam Div, 1577 Kurimamachiya Cho, Tsu, Mie 5148507, Japan; [Ando, Yuta] Niigata Univ, Fac Sci, Nishi Ku, 8050 Ikarashi 2-No Cho, Niigata 9502181, Japan
推荐引用方式 GB/T 7714	Nakanishi, Tomoe,Tachibana, Yoshihiro,Ando, Yuta. Possible semi-circumglobal teleconnection across Eurasia driven by deep convection over the Sahel[J],2021.
APA	Nakanishi, Tomoe,Tachibana, Yoshihiro,&Ando, Yuta.(2021).Possible semi-circumglobal teleconnection across Eurasia driven by deep convection over the Sahel.CLIMATE DYNAMICS.
MLA	Nakanishi, Tomoe,et al."Possible semi-circumglobal teleconnection across Eurasia driven by deep convection over the Sahel".CLIMATE DYNAMICS (2021).