| DOI: | 10.3354/cr01495
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| Scopus记录号: | 2-s2.0-85044408457
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| 论文题名: | Role of Weddell Sea ice in South Atlantic atmospheric variability |
| 作者: | Morioka Y.; Engelbrecht F.; Behera S.K.
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| 刊名: | Climate Research
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| ISSN: | 0936577X
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| 出版年: | 2017
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| 卷: | 74, 期:2 | | 起始页码: | 171
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| 结束页码: | 184
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| 语种: | 英语
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| 英文关键词: | Air-sea-ice interaction
; Atmospheric teleconnection
; Coupled general circulation model
; Interannual variability
; South Atlantic
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| Scopus关键词: | air-sea interaction
; annual variation
; anticyclone
; atmospheric circulation
; general circulation model
; sea ice
; sea surface temperature
; solar radiation
; teleconnection
; Atlantic Ocean
; Atlantic Ocean (South)
; Southern Ocean
; Weddell Sea
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| 英文摘要: | We investigated the role of Weddell Sea ice in atmospheric variability over the South Atlantic by conducting observational data analysis and coupled general circulation model (CGCM) experiments. Weddell Sea ice exhibits a pronounced interannual variability in early austral summer (November-January). Low sea-ice concentration (SIC) anomalies in the Weddell Sea are strongly associated with anticyclonic atmospheric circulation anomalies in the South Atlantic. Composite analysis reveals that the low SIC anomalies in the Weddell Sea may be attributed to increased solar radiation and northwesterly wind anomalies. The low SIC anomalies, in turn, contribute to warmer skin temperature in the band of 60-70° S and enhance the near-surface atmo - spheric stability north of this band, implying favorable conditions for sustaining the anticyclonic circulation anomalies in the South Atlantic. This intriguing association between the SIC and atmospheric circulation anomalies is also simulated in CGCM experiments, e.g. when the interannual sea surface temperature variability in the tropics and mid-latitudes is suppressed. These results suggest that Weddell Sea ice, which may undergo interannual variation via air-sea-ice interactions in the high latitudes, influences atmospheric variability over the South Atlantic. © The authors 2017. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/116296
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| Appears in Collections: | 气候减缓与适应
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| Recommended Citation: | |
Morioka Y.,Engelbrecht F.,Behera S.K.. Role of Weddell Sea ice in South Atlantic atmospheric variability[J]. Climate Research,2017-01-01,74(2)
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