Interannual Variability of Arctic Landfast Ice between 1976 and 2007
Interannual Variability of Arctic Landfast Ice between 1976 and 2007
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DOI：
10.1175/jcli-d-13-00178.1
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发表时间：
2014-01
影响因子：
4.9
通讯作者：
Yanling Yu;H. Stern;C. Fowler;F. Fetterer;J. Maslanik
中科院分区：
文献类型：
--
作者：
Yanling Yu;H. Stern;C. Fowler;F. Fetterer;J. Maslanik
摘要对美国国家冰中心1976年至2007年制作的每周海冰图表的分析表明，北极盆地周围冬季平均陆地固定冰范围存在很大的年际变化。在有记录的32年期间，从20世纪80年代早期到中期，陆地固定冰覆盖范围相对广泛，但自那时以来，北极许多沿海地区的冰覆盖面积有所下降，特别是在20世纪90年代初之后。虽然巴伦支海、波罗的海和白令海的固陆冰面积有所增加，但北方半球的整体变化是负的，约为-12.27（±2.8）× 103 km 2 yr−1，或相对于长期平均值的-7（±1.5）% decade−1。除了少数沿海地区，整体而言，固定陆冰的季节性持续时间较短，特别是在拉普捷夫海、东西伯利亚海和楚科奇海。冬季固定陆冰范围的减少与冰的生长和融化模式的一些显着变化，特别是自1990年以来的秋季和初冬期间固定陆冰扩张放缓。观察到的.
AbstractAnalysis of weekly sea ice charts produced by the U.S. National Ice Center from 1976 to 2007 indicates large interannual variations in the averaged winter landfast ice extent around the Arctic Basin. During the 32-yr period of the record, landfast ice cover was relatively extensive from the early to mid-1980s but since then has declined in many coastal regions of the Arctic, particularly after the early 1990s. While the Barents, Baltic, and Bering Seas show increases in landfast ice area, the overall change for the Northern Hemisphere is negative, about −12.27 (±2.8) × 103 km2 yr−1, or −7 (±1.5)% decade−1 relative to the long-term mean. Except in a few coastal regions, the seasonal duration of landfast ice is shorter overall, particularly in the Laptev, East Siberian, and Chukchi Seas. The decreased winter landfast ice extent is associated with some notable changes in ice growth and melt patterns, in particular the slowed landfast ice expansion during fall and early winter since 1990. The observed...