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DOI | 10.1007/s00382-016-3162-z |
Fast and slow responses of Southern Ocean sea surface temperature to SAM in coupled climate models | |
Kostov, Yavor1,2; Marshall, John1; Hausmann, Ute1; Armour, Kyle C.3; Ferreira, David4; Holland, Marika M.5 | |
2017-03-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2017 |
卷号 | 48 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; England |
英文摘要 | We investigate how sea surface temperatures (SSTs) around Antarctica respond to the Southern Annular Mode (SAM) on multiple timescales. To that end we examine the relationship between SAM and SST within unperturbed preindustrial control simulations of coupled general circulation models (GCMs) included in the Climate Modeling Intercomparison Project phase 5 (CMIP5). We develop a technique to extract the response of the Southern Ocean SST (55A degrees S-70A degrees S) to a hypothetical step increase in the SAM index. We demonstrate that in many GCMs, the expected SST step response function is nonmonotonic in time. Following a shift to a positive SAM anomaly, an initial cooling regime can transition into surface warming around Antarctica. However, there are large differences across the CMIP5 ensemble. In some models the step response function never changes sign and cooling persists, while in other GCMs the SST anomaly crosses over from negative to positive values only 3 years after a step increase in the SAM. This intermodel diversity can be related to differences in the models' climatological thermal ocean stratification in the region of seasonal sea ice around Antarctica. Exploiting this relationship, we use observational data for the time-mean meridional and vertical temperature gradients to constrain the real Southern Ocean response to SAM on fast and slow timescales. |
英文关键词 | Southern Ocean Southern Annular Mode Surface westerlies Atmosphere-ocean interaction CMIP5 |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000395060900012 |
WOS关键词 | ANNULAR MODE ; ICE RESPONSE ; CMIP5 MODELS ; OZONE HOLE ; HEMISPHERE ; ATMOSPHERE ; TRENDS ; CIRCULATION ; SALINITY ; WINDS |
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/35644 |
专题 | 气候变化 |
作者单位 | 1.MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA; 2.Univ Oxford, Dept Phys, Clarendon Lab, Parks Rd, Oxford OX1 3PU, England; 3.Univ Washington, Sch Oceanog, Dept Atmospher Sci, Seattle, WA 98195 USA; 4.Univ Reading, Dept Meteorol, POB 243, Reading RG6 6BB, Berks, England; 5.Natl Ctr Atmospher Res, Boulder, CO USA |
推荐引用方式 GB/T 7714 | Kostov, Yavor,Marshall, John,Hausmann, Ute,et al. Fast and slow responses of Southern Ocean sea surface temperature to SAM in coupled climate models[J]. CLIMATE DYNAMICS,2017,48. |
APA | Kostov, Yavor,Marshall, John,Hausmann, Ute,Armour, Kyle C.,Ferreira, David,&Holland, Marika M..(2017).Fast and slow responses of Southern Ocean sea surface temperature to SAM in coupled climate models.CLIMATE DYNAMICS,48. |
MLA | Kostov, Yavor,et al."Fast and slow responses of Southern Ocean sea surface temperature to SAM in coupled climate models".CLIMATE DYNAMICS 48(2017). |
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