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首页> 外文期刊>Environmental Research Letters >Less winter cloud aids summer 2013 Arctic sea ice return from 2012 minimum
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Less winter cloud aids summer 2013 Arctic sea ice return from 2012 minimum

机译：冬季云量减少，2013年夏季北极海冰从2012年最低值返回

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In September 2012, Arctic sea ice cover reached a record minimum for the satellite era. The following winter the sea ice quickly returned, carrying through to the summer when ice extent was 48% greater than the same time in 2012. Most of this rebound in the ice cover was in the Chukchi and Beaufort Seas, areas experiencing the greatest decline in sea ice over the last three decades. A variety of factors, including ice dynamics, oceanic and atmospheric heat transport, wind, and solar insolation anomalies, may have contributed to the rebound. Here we show that another factor, below-average Arctic cloud cover in January–February 2013, resulted in a more strongly negative surface radiation budget, cooling the surface and allowing for greater ice growth. More thick ice was observed in March 2013 relative to March 2012 in the western Arctic Ocean, and the areas of ice growth estimated from the negative cloud cover anomaly and advected from winter to summer with ice drift data, correspond well with the September ice concentration anomaly pattern. Therefore, decreased wintertime cloud cover appears to have played an important role in the return of the sea ice cover the following summer, providing a partial explanation for large year-to-year variations in an otherwise decreasing Arctic sea ice cover.
机译：2012年9月，北极海冰覆盖面积达到了卫星时代的最低记录。接下来的冬天，海冰迅速恢复，一直延续到夏天，当时冰的覆盖范围比2012年同期增加了48％。大部分的冰盖回升发生在楚科奇海和博福特海，这些地区的降冰量最大。最近三十年来的海冰。各种因素，包括冰动力学，海洋和大气的热传输，风和日照异常，都可能导致反弹。在这里，我们显示出另一个因素，即2013年1月至2月北极云的覆盖率低于平均水平，导致更强烈的负表面辐射预算，冷却了表面并允许更大的冰增长。在北冰洋西部，2013年3月相对于2012年3月观测到了更厚的冰，根据负云层覆盖异常估计并从冬季到夏季利用冰漂移数据平移的冰生长面积与9月份的冰浓度异常非常吻合。模式。因此，冬季的云量减少似乎在次年夏季的海冰覆盖率恢复中起了重要作用，这为北极海冰覆盖率逐年减少的年际变化提供了部分解释。

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