气候变化领域集成服务门户(CCPortal): Essential Role of the Midlatitude South Atlantic Variability in Altering the Southern Hemisphere Summer Storm Tracks

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DOI	10.1029/2020GL087910
	Essential Role of the Midlatitude South Atlantic Variability in Altering the Southern Hemisphere Summer Storm Tracks
	Zhang L.; Gan B.; Wang H.; Wu L.; Cai W.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:17
英文摘要	Storm tracks are a pivotal component in extratropical weather and climate. The sea surface temperature (SST) front in the midlatitude South Indian Ocean has been found to anchor the climatological core of the Southern Hemisphere (SH) storm tracks. However, on interannual-to-decadal timescales, observational and modeling evidence is presented here that the strengthened SST front in the midlatitude western South Atlantic (SA) can intensify the SH summer storm tracks by supplying more baroclinic energy, which overwhelms contributions from other oceanic frontal zones. Idealized experiments suggest that such a predominant impact on synoptic storms lies in the strengthened SA SST front acting in concert with the favorable thermal background produced in the presence of the Andes (i.e., enhancements of downstream low-level temperature gradients and synoptic temperature variability). Our findings imply that oceanic variability in the western SA frontal zone could be a remote regulator of the SH extratropical summer climate variability. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Storms; Surface waters; Oceanic variabilities; Sea surface temperature (SST); South Indian Ocean; Southern Hemisphere; Southern hemisphere storm tracks; Synoptic storms; Temperature variability; Thermal background; Oceanography; baroclinic motion; climate change; frontal feature; low temperature; sea surface temperature; Southern Hemisphere; storm; summer; timescale; Andes; Atlantic Ocean; Atlantic Ocean (South); Indian Ocean; Indian Ocean (South)
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169828
作者单位	Key Laboratory of Physical Oceanography/Institute for Advanced Ocean Studies, Ocean University of China and Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; Centre for Southern Hemisphere Oceans Research (CSHOR), CSIRO Oceans and Atmosphere, Hobart, TAS, Australia
推荐引用方式 GB/T 7714	Zhang L.,Gan B.,Wang H.,et al. Essential Role of the Midlatitude South Atlantic Variability in Altering the Southern Hemisphere Summer Storm Tracks[J],2020,47(17).
APA	Zhang L.,Gan B.,Wang H.,Wu L.,&Cai W..(2020).Essential Role of the Midlatitude South Atlantic Variability in Altering the Southern Hemisphere Summer Storm Tracks.Geophysical Research Letters,47(17).
MLA	Zhang L.,et al."Essential Role of the Midlatitude South Atlantic Variability in Altering the Southern Hemisphere Summer Storm Tracks".Geophysical Research Letters 47.17(2020).