Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-17-0817.1 |
Divergent Responses of Extratropical Atmospheric Circulation to Interhemispheric Dipolar SST Forcing over the Two Hemispheres in Boreal Winter | |
Xue, Jiaqing1,2; Sun, Cheng3; Li, Jianping3,4; Mao, Jiangyu1; Nakamura, Hisashi5; Miyasaka, Takafumi5,6; Xu, Yidan3 | |
2018-09-01 | |
发表期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2018 |
卷号 | 31期号:18页码:7599-7619 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; Japan |
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 SST-forced 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. |
英文关键词 | Climate variability |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000440982200004 |
WOS关键词 | SEA-SURFACE TEMPERATURE ; MERIDIONAL OVERTURNING CIRCULATION ; ATLANTIC MULTIDECADAL OSCILLATION ; SOUTHERN-HEMISPHERE ; STORM TRACKS ; NORTH-ATLANTIC ; ANNULAR MODE ; PART I ; CLIMATE VARIABILITY ; FLOW INTERACTION |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/20315 |
专题 | 气候变化 |
作者单位 | 1.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Numer Modeling Atmospher Sci & Geop, Beijing, Peoples R China; 2.Univ Chinese Acad Sci, Coll Earth Sci, Beijing, Peoples R China; 3.Beijing Normal Univ, Coll Global Change & Earth Syst Sci, Beijing, Peoples R China; 4.Qingdao Natl Lab Marine Sci & Technol, Lab Reg Oceanog & Numer Modeling, Qingdao, Peoples R China; 5.Univ Tokyo, Res Ctr Adv Sci & Technol, Climate Sci Res Lab, Tokyo, Japan; 6.Japan Meteorol Agcy, Meteorol Res Inst, Tsukuba, Ibaraki, Japan |
推荐引用方式 GB/T 7714 | Xue, Jiaqing,Sun, Cheng,Li, Jianping,et al. Divergent Responses of Extratropical Atmospheric Circulation to Interhemispheric Dipolar SST Forcing over the Two Hemispheres in Boreal Winter[J]. JOURNAL OF CLIMATE,2018,31(18):7599-7619. |
APA | Xue, Jiaqing.,Sun, Cheng.,Li, Jianping.,Mao, Jiangyu.,Nakamura, Hisashi.,...&Xu, Yidan.(2018).Divergent Responses of Extratropical Atmospheric Circulation to Interhemispheric Dipolar SST Forcing over the Two Hemispheres in Boreal Winter.JOURNAL OF CLIMATE,31(18),7599-7619. |
MLA | Xue, Jiaqing,et al."Divergent Responses of Extratropical Atmospheric Circulation to Interhemispheric Dipolar SST Forcing over the Two Hemispheres in Boreal Winter".JOURNAL OF CLIMATE 31.18(2018):7599-7619. |
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