| 北极迅速变暖条件下西北航道的海冰分布变化特征 |
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| 引用本文： | 苏洁,徐栋,赵进平,李翔.北极迅速变暖条件下西北航道的海冰分布变化特征[J].极地研究,2010,22(2):104-124. |
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| 作者姓名： | 苏洁 徐栋 赵进平 李翔 |
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| 作者单位： | 1. 中国海洋大学;
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| 基金项目： | 国家自然科学面上基金，自然科学重点基金，863项目 |
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| 摘 要： | 北极近年迅速变暖使西北航道的通航成为可能。本文利用AMSR-E的6.25km分辨率日平均海冰密集度卫星数据研究了2002-2008年北极西北航道的海冰密集度变化特征。通过统计分析沿西北航线冰障关键流段代表站点的融化期、轻冰期、无冰期、无冰天数和轻冰天数，以及海冰分布和变化的某些细节，加深了对西北航道海冰季节变化和年际变化以及空间分布的主要特征，特别是与通航相关的冰情信息的了解。研究指出西北航道南路比北路容易开通；各线路冰障流段存在的时间呈减小趋势，整条线路无冰/轻冰天数呈增加趋势；冰间湖和冰间水道的产生和发展在很大程度上可能会影响到整个航路的融冰开始时间。
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| 关 键 词： | 西北航道、海冰分布变化、冰障、无冰天数 冰间湖 |
| 收稿时间： | 2010-02-22 |
| 修稿时间： | 2010-05-20 |
Features of Northwest Passage Sea Ice’s Distribution and Variation under Arctic Rapidly Warming Condition |
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| Su Jie,Xu Dong,Zhao Jinping,Li Xiang.Features of Northwest Passage Sea Ice’s Distribution and Variation under Arctic Rapidly Warming Condition[J].Chinese Journal of Polar Research,2010,22(2):104-124. |
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| Authors: | Su Jie Xu Dong Zhao Jinping Li Xiang |
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| Abstract: | Recently, rapid warming of the Arctic has made it possible for the Northwest Passage navigation. In this paper, we studied the characters of variation of sea ice concentration around the Northwest Passage using AMSR-E sea ice concentration product with the resolution of 6.25 kilometers from the year 2002 to 2008. By analysis melting period, ice-free period, slight-ice period, ice-free days, slight-ice days, as well as some details of the variation and distribution of sea ice in main ice-block area along the passages, We got deeper understanding of the main features of sea ice seasonal and interannual variation and distribution, especially the information related to Northwest Passage’s navigation possibility. Our research shows that south route is easier to navigate than north route of Northwest Passage. The existing time period of ice-blocking part of each route represents a decreasing trend, while ice-free and light ice dates show a increasing trend. The variation and distribution of polynya and Circumpolar Flaw Lead might effect the beginning time of sea ice melting of the whole passage in great extent. |
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| Keywords: | Northwest Passage sea ice distribution and variation ice-block ice-free days polynya |
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