Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-018-4083-9 |
Impact of Gulf Stream SST biases on the global atmospheric circulation | |
Lee, Robert W.1; 39;Reilly, Christopher H.2 | |
2018-11-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2018 |
卷号 | 51页码:3369-3387 |
文章类型 | Article |
语种 | 英语 |
国家 | England |
英文摘要 | The UK Met Office Unified Model in the Global Coupled 2 (GC2) configuration has a warm bias of up to almost 7K in the Gulf Stream SSTs in the winter season, which is associated with surface heat flux biases and potentially related to biases in the atmospheric circulation. The role of this SST bias is examined with a focus on the tropospheric response by performing three sensitivity experiments. The SST biases are imposed on the atmosphere-only configuration of the model over a small and medium section of the Gulf Stream, and also the wider North Atlantic. Here we show that the dynamical response to this anomalous Gulf Stream heating (and associated shifting and changing SST gradients) is to enhance vertical motion in the transient eddies over the Gulf Stream, rather than balance the heating with a linear dynamical meridional wind or meridional eddy heat transport. Together with the imposed Gulf Stream heating bias, the response affects the troposphere not only locally but also in remote regions of the Northern Hemisphere via a planetary Rossby wave response. The sensitivity experiments partially reproduce some of the differences in the coupled configuration of the model relative to the atmosphere-only configuration and to the ERA-Interim reanalysis. These biases may have implications for the ability of the model to respond correctly to variability or changes in the Gulf Stream. Better global prediction therefore requires particular focus on reducing any large western boundary current SST biases in these regions of high ocean-atmosphere interaction. |
英文关键词 | HadGEM3-CG2 Sensitivity experiments Western boundary currents Vertical motion Planetary waves North Atlantic jet |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000447366100011 |
WOS关键词 | ERA-INTERIM REANALYSIS ; AIR-SEA INTERACTION ; COUPLED MODEL ; JET-STREAM ; WAVE-GUIDE ; PART II ; CONFIGURATION ; VARIABILITY ; CLIMATE ; REGION |
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/35652 |
专题 | 气候变化 |
作者单位 | 1.Univ Reading, Dept Meteorol, NCAS Climate, Reading RG6 6BB, Berks, England; 2.Univ Oxford, Atmospher Ocean & Planetary Phys, Oxford, England; 3.Univ Reading, Dept Meteorol, Reading, Berks, England; 4.Met Off, Exeter, Devon, England |
推荐引用方式 GB/T 7714 | Lee, Robert W.,39;Reilly, Christopher H.. Impact of Gulf Stream SST biases on the global atmospheric circulation[J]. CLIMATE DYNAMICS,2018,51:3369-3387. |
APA | Lee, Robert W.,&39;Reilly, Christopher H..(2018).Impact of Gulf Stream SST biases on the global atmospheric circulation.CLIMATE DYNAMICS,51,3369-3387. |
MLA | Lee, Robert W.,et al."Impact of Gulf Stream SST biases on the global atmospheric circulation".CLIMATE DYNAMICS 51(2018):3369-3387. |
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