| DOI: | 10.1007/s00382-013-1679-y
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| Scopus记录号: | 2-s2.0-84884699670
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| 论文题名: | A case study of a modelled episode of low Arctic sea ice |
| 作者: | Keen A.B.; Hewitt H.T.; Ridley J.K.
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| 刊名: | Climate Dynamics
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| ISSN: | 9307575
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| 出版年: | 2013
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| 卷: | 41, 期:2017-05-06 | | 起始页码: | 1229
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| 结束页码: | 1244
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| 语种: | 英语
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| 英文摘要: | Simulations of the Arctic sea ice cover over the last 32 years generated by the HadGEM1 coupled climate model are able to capture the observed long term decline in mean September ice extent. HadGEM1 is also capable of producing an episode of low September ice extent of similar magnitude to the anomalously low extent observed in 2007. Using a heat budget analysis, together with diagnostics partitioning the changes in ice and snow mass into thermodynamic and dynamic components, we analyse the factors driving the long term decline in the ice mass and extent as well as those causing the modelled low ice event. The long term decline in the mass of ice and snow in HadGEM1 is largely due to extra melting during the summer, partly at the top surface of the ice, and partly via extra heating from the ocean as it warms due to the ice retreat. The episode of low summer ice extent is largely driven by the synoptic conditions over the summer moving the ice across and out of the Arctic basin, and also due to pre-conditioning of the snow and ice which is thinner than usual in the Eastern Arctic at the start of the melt season. This case study demonstrates that although HadGEM1 does not capture the persistent dipole pressure anomaly observed during the summer of 2007, it represents broadly similar mechanisms of generating a low ice extent. © 2013 Crown Copyright. |
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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/54787
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| Appears in Collections: | 过去全球变化的重建
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作者单位: | Met Office Hadley Centre, Fitzroy Road, Exeter, EX1 3PB, United Kingdom
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| Recommended Citation: | |
Keen A.B.,Hewitt H.T.,Ridley J.K.. A case study of a modelled episode of low Arctic sea ice[J]. Climate Dynamics,2013-01-01,41(2017-05-06)
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