globalchange  > 气候减缓与适应
DOI: 10.1175/JCLI-D-17-0817.1
Scopus记录号: 2-s2.0-85052948838
论文题名:
Divergent responses of extratropical atmospheric circulation to interhemispheric dipolar SST forcing over the two hemispheres in boreal winter
作者: Xue J.; Sun C.; Li J.; Mao J.; Nakamura H.; Miyasaka T.; Xu Y.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期:18
起始页码: 7599
结束页码: 7619
语种: 英语
英文关键词: Climate variability
Scopus关键词: Regression analysis ; Sea level ; Storms ; Surface waters ; Atmospheric baroclinicity ; Atmospheric circulation ; Barotropic structures ; Climate variability ; Extratropical circulation ; Northern hemisphere ; Sea surface temperature (SST) ; Southern Annular Mode ; Climatology
英文摘要: Global sea surface temperature (SST) evolution exhibits an antiphase variation between the two hemispheres that is referred to as the SST interhemispheric dipole (SSTID) mode. The impacts of the SSTID on extratropical atmospheric circulation in boreal winter are explored by both regression analysis and SSTforced numerical simulations. The responses of extratropical circulation to SSTID thermal forcing bear an equivalent barotropic structure. For the Southern Hemisphere (SH), positive SSTID events lead to a meridional dipolar perturbation in sea level pressure (SLP), similar in pattern to the positive southern annular mode (SAM). Although SSTID-forced SLP anomalies over the Northern Hemisphere (NH) do not exhibit a zonally symmetric pattern as is the case over the SH, they still show signs of a meridional dipole opposite to the SH over the oceans. Divergent circulation responses to SSTID forcing between the two hemispheres are suggested to be associated with contrasting storm-track variations. Positive SSTID events weaken oceanic fronts in both the North Atlantic and North Pacific, and thus lead to the decline of NH storm-track activity by decreasing atmospheric baroclinicity. In the SH, positive SSTID events correspond to the enhancement of SH transients by intensifying the Antarctic polar-frontal zone. Additionally, local baroclinic energy conversions are diagnosed to explain the SSTID-related storm-track variations over both hemispheres. Finally, an investigation of transient eddy feedback indicates that the SSTID mode modulates extratropical atmospheric circulation, primarily by regulating storm tracks and changing the corresponding eddy feedback. © 2018 American Meteorological Society.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111408
Appears in Collections:气候减缓与适应

Files in This Item:

There are no files associated with this item.


作者单位: State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; College of Earth Science, University of Chinese Academy of Sciences, Beijing, China; College of Global Change and Earth System Science, Beijing Normal University, Beijing, China; Laboratory for Regional Oceanography and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; Climate Science Research Laboratory, Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo, Japan; Meteorological Research Institute, Japan Meteorological Agency, Tsukuba, Japan

Recommended Citation:
Xue J.,Sun C.,Li J.,et al. Divergent responses of extratropical atmospheric circulation to interhemispheric dipolar SST forcing over the two hemispheres in boreal winter[J]. Journal of Climate,2018-01-01,31(18)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Xue J.]'s Articles
[Sun C.]'s Articles
[Li J.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Xue J.]'s Articles
[Sun C.]'s Articles
[Li J.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Xue J.]‘s Articles
[Sun C.]‘s Articles
[Li J.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.