| DOI: | 10.1007/s00382-014-2462-4
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| Scopus记录号: | 2-s2.0-84943817692
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| 论文题名: | Extreme small-scale wind episodes over the Barents Sea: When, where and why? |
| 作者: | Kolstad E.W.
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| 刊名: | Climate Dynamics
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| ISSN: | 9307575
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| 出版年: | 2015
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| 卷: | 45, 期:2017-07-08 | | 起始页码: | 2137
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| 结束页码: | 2150
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| 语种: | 英语
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| 英文关键词: | Extreme weather
; Hindcasts
; Numerical models
; Polar lows
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| 英文摘要: | The Barents Sea is mostly ice-free during winter and therefore prone to severe weather associated with marine cold air outbreaks, such as polar lows. With the increasing marine activity in the region, it is important to study the climatology and variability of episodes with strong winds, as well as to understand their causes. Explosive marine cyclogenesis is usually caused by a combination of several mechanisms: upper-level forcing, stratospheric dry intrusions, latent heat release, surface energy fluxes, low-level baroclinicity. An additional factor that has been linked to extremely strong surface winds, is low static stability in the lower atmosphere, which allows for downward transfer of high-momentum air. Here the most extreme small-scale wind episodes in a high-resolution (5 km) 35-year hindcast were analyzed, and it was found that they were associated with unusually strong low-level baroclinicity and surface heat fluxes. And crucially, the 12 most severe episodes had stronger cold-air advection than 12 slightly less severe cases, suggesting that marine cold air outbreaks are the most important mechanism for extreme winds on small spatial scales over the Barents Sea. Because weather models are often unable to explicitly forecast small-scale developments in data-sparse regions such as the Barents Sea, these results can be used by forecasters as supplements to forecast model data. © 2014, Springer-Verlag Berlin Heidelberg. |
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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/53999
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| Appears in Collections: | 过去全球变化的重建
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作者单位: | StormGeo, Bergen, Norway; Uni Research and Bjerknes Centre for Climate Research, Allégaten 70, Bergen, Norway
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| Recommended Citation: | |
Kolstad E.W.. Extreme small-scale wind episodes over the Barents Sea: When, where and why?[J]. Climate Dynamics,2015-01-01,45(2017-07-08)
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