Spatiotemporal Variability of Sea Ice in the Arctic's Last Ice Area
Spatiotemporal Variability of Sea Ice in the Arctic's Last Ice Area
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DOI：
10.1029/2019gl083722
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发表时间：
2019-10-28
影响因子：
5.2
通讯作者：
Steele, M.
中科院分区：
文献类型：
--
作者：
Moore, G. W. K.;Schweiger, A.;Steele, M.
北冰洋最古老、最厚的海冰位于从加拿大北极群岛西部到格陵兰岛北方海岸的2,000公里弧形地带沿着。气候模型表明，这一地区将是最后一个失去常年冰盖的地区，从而为依赖冰的物种提供了重要的避难所。然而，人们对这一偏远荒凉地区的气候或海冰特征知之甚少。在这里，我们使用泛北极冰洋建模和同化系统模型来显示该地区的冰盖非常动态，变化速度是整个北冰洋的两倍。然而，在最后一个冰区的东部和西部地区之间的冰盖的变化性质，其中包括不同的时间在冰厚度的年度最小值，以及不同的冰运动模式与冰厚度极值之间的一些差异。
The Arctic Ocean's oldest and thickest sea ice lies along the 2,000 km arc from the western Canadian Arctic Archipelago to the northern coast of Greenland. Climate models suggest that this region will be the last to lose its perennial ice cover, thus providing an important refuge for ice-dependent species. However, remarkably little is known about the climate or characteristics of the sea ice in this remote and inhospitable region. Here, we use the Pan-Arctic Ice Ocean Modeling and Assimilation System model to show that the ice cover in the region is very dynamic, with changes occurring at a rate twice that of the Arctic Ocean as a whole. However, there are some differences in the changing nature of the ice cover between the eastern and western regions of the Last Ice Area, which include different timing of the annual minimum in ice thickness as well as distinct ice motion patterns associated with ice thickness extrema.