Record winter winds in 2020/21 drove exceptional Arctic sea ice transport
Record winter winds in 2020/21 drove exceptional Arctic sea ice transport
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DOI：
10.1038/s43247-021-00221-8
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发表时间：
2021-08
影响因子：
7.9
通讯作者：
R. Mallett;J. Stroeve;S. Cornish;A. Crawford;J. Lukovich;M. Serreze;A. Barrett;W. Meier;H. Heorton;M. Tsamados
中科院分区：
文献类型：
--
作者：
R. Mallett;J. Stroeve;S. Cornish;A. Crawford;J. Lukovich;M. Serreze;A. Barrett;W. Meier;H. Heorton;M. Tsamados
北极海冰的体积正在减少，但表现出很高的年际变化，这主要是由大气环流驱动的。通过对卫星冰产品和大气再分析数据的分析，我们发现2020/21年冬季的特点是北冰洋中部的海平面压力非常高，导致海冰上出现了前所未有的反气旋风。这种大气环流模式将较老的海冰从北冰洋中部驱赶到低纬度的博福特海，在那里，海冰更容易在即将到来的温暖季节融化。我们认为，这种不寻常的大气环流可能会导致异常高的夏季北极剩余储存的旧冰的损失。
The volume of Arctic sea ice is in decline but exhibits high interannual variability, which is driven primarily by atmospheric circulation. Through analysis of satellite-derived ice products and atmospheric reanalysis data, we show that winter 2020/21 was characterised by anomalously high sea-level pressure over the central Arctic Ocean, which resulted in unprecedented anticyclonic winds over the sea ice. This atmospheric circulation pattern drove older sea ice from the central Arctic Ocean into the lower-latitude Beaufort Sea, where it is more vulnerable to melting in the coming warm season. We suggest that this unusual atmospheric circulation may potentially lead to unusually high summer losses of the Arctic’s remaining store of old ice.