On the record reduction in 1998 western Arctic sea-ice cover
On the record reduction in 1998 western Arctic sea-ice cover
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DOI：
10.1029/1999gl900426
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发表时间：
1999-07-01
影响因子：
5.2
通讯作者：
Agnew, T
中科院分区：
文献类型：
--
作者：
Maslanik, JA;Serreze, MC;Agnew, T
1998年夏季，博福特海和楚科奇海的冰盖出现了创纪录的减少。开放水域的形成早于往年，9月该地区的冰面积比1953 - 1997年的最低值减少了25%。1998年，北极盆地7%的常年被冰雪覆盖的地区已经无冰。北极西部冰层范围的减少部分归因于1997年秋季的轻冰覆盖预处理，以及接下来的冬季至秋季的大气环流模式有利于南风和东风。北风的这种减少，以及与之相关的博福特环流的减弱或位移，被认为是北极西部冰面积低于正常水平的年份之前的冬季的典型现象。
During summer 1998, record reductions in ice cover occurred in the Beaufort and Chukchi seas. Open water formed earlier than in prior years, and September ice extent in this region was 25 percent less than the previous minimum for 1953-1997. Seven percent of the Arctic Basin that had been perennially ice covered was ice-free in 1998. This reduction in western Arctic ice extent can be attributed in part to preconditioning by light-ice cover in autumn 1997 and to atmospheric circulation patterns during the following winter through autumn that favored southerly and easterly winds. Such decreases in northerly winds, and the associated weakening or displacement of the Beaufort Gyre, is found to be typical of winters that precede years with below-normal ice extent in the western Arctic.