气候变化领域集成服务门户(CCPortal): Tropical forcing of the circumglobal teleconnection pattern in boreal winter

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DOI	10.1007/s00382-021-05744-6
	Tropical forcing of the circumglobal teleconnection pattern in boreal winter
	Soulard N.; Lin H.; Derome J.; Yu B.
发表日期	2021
ISSN	0930-7575
起始页码	603
结束页码	614
英文摘要	Recently there has been an increase in interest in hemispheric-scale teleconnections. The circumglobal teleconnection pattern (CGT) is a special zonal phase of the jet whereby disturbances originating near the South Asian jet entrance, or within the jet, remain trapped and can propagate around the globe. Recent studies have shown that this CGT pattern affects climatic conditions across the entire hemisphere, from North America to Europe to South Asia. The CGT is generally thought of as an internal mode of atmospheric variability, but this study aims to examine whether the CGT can be forced during the boreal winter when the jet is at its peak amplitude. To accomplish this, we make use of a simple general circulation model to test whether an imposed diabatic heating anomaly in the tropics can force the CGT. Results from the simple model show that heating over the equatorial Indian Ocean and cooling over the western Tropical Pacific Ocean can drive a CGT-like pattern. Lagged regression using pentad reanalysis data supports these results, showing that a dipole convection pattern in these same regions precede the CGT. © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Circumglobal teleconnection; Climate variability; Teleconnections; Tropical forcing
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/183497
作者单位	Department of Atmospheric and Oceanic Science, McGill University, Montreal, QC, Canada; Recherche en Prévision Numérique Atmosphérique, Environment and Climate Change Canada, Dorval, QC, Canada; Climate Research Division, Environment and Climate Change Canada, Toronto, ON, Canada
推荐引用方式 GB/T 7714	Soulard N.,Lin H.,Derome J.,et al. Tropical forcing of the circumglobal teleconnection pattern in boreal winter[J],2021.
APA	Soulard N.,Lin H.,Derome J.,&Yu B..(2021).Tropical forcing of the circumglobal teleconnection pattern in boreal winter.Climate Dynamics.
MLA	Soulard N.,et al."Tropical forcing of the circumglobal teleconnection pattern in boreal winter".Climate Dynamics (2021).