陈萍,赵进平

• 1:中国海洋大学物理海洋教育部重点实验室

摘要(Abstract)：

北极海冰的快速减退是近年来全球变化最重要的现象,对全球气候产生显著影响。海表面风场是影响海冰变化的核心因素,但风场对各个海域海冰变化的贡献有很大差异,需要深入了解海表面风场对各个边缘海的贡献才能理解北极海冰变化的原因。本文采用SVD方法,分析海冰面积显著变化时的矢量风场与海冰密集度变化的关系,探讨风场对各个海域海冰的总体影响及对整个北极海冰变化的贡献。结果表明,各海区海冰密集度的变化都与海面风场有联系,但相关程度有明显差异,表明在有些海域风场起支配性作用,而在另一些海域其他因素的作用也很显著。对海冰产生影响的风场类型主要有三类:纬向风、经向风和气旋式风场。在波弗特海-拉普捷夫海这4个海域中,仅有1种类型的风场(纬向风或经向风)对海冰产生显著影响,同一海域海冰密集度呈现位相一致的变化。而在其他海域,有2种类型的风场(纬向风与气旋式风场,经向风与气旋式风场)影响海冰变化,同一海域的海冰密集度会呈现位相相反的变化。北极海冰的变化是一个整体,各个边缘海的海冰既有各自的变化特点,又有很好的整体协同变化特点。而2004年以来,加拿大海盆反气旋式风场与欧亚海盆弱的气旋式风场的整体结构呈现逐渐加强的趋势,有利于北极海冰的进一步减退。

关键词(KeyWords)： 海冰密集度;海面风场;奇异值分解;北极边缘海

Abstract:

Keywords:

基金项目(Foundation): 全球变化研究国家重大科学研究计划项目(2015CB953900);; 国家自然科学基金重点项目(41330960);; 中国极地科学战略研究基金项目(20120102);; 国家自然基金青年基金项目(41406208)资助~~

作者(Author): 陈萍,赵进平

DOI: 10.16441/j.cnki.hdxb.20160212

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