收稿日期: 2014-12-11
修回日期: 2015-04-28
网络出版日期: 2015-11-15
基金资助
国家海洋局海洋公益性行业科研专项(201205007-03)和国家海洋局南北极环境综合考察与评估专项(CHINARE2014-02-04)资助
Temporal and spatial variation of the Arctic sea ice from 2003 to 2012 based on the change trajectories
Received date: 2014-12-11
Revised date: 2015-04-28
Online published: 2015-11-15
北极地区的海冰作为一个重要的气候组成成分,被认为是早期人为影响气候变化的指标.对北极地区海冰的时空变化研究,不仅对全球气候系统有着重要的意义,而且对海上的交通运输也起着重要作用.本文针对北极地区海冰的特点,在AMSR-E L2海冰密集度产品数据的基础上,利用时空轨迹法,分析近10年间北极地区海冰的时空变化.结果表明,在10年间北极地区的海冰密集度基本呈现下降趋势;海冰覆盖在每年的1月份左右达到最大,9月份左右达到最低.由于北极海冰的不断消融,北冰洋的海冰在一年之中开始出现了与大陆分离的区域,这就极大地增加了北极地区海事活动的可能性,如北极航线的更新与开辟等.
韩莹 , 芮小平 , 程晓 , 惠凤鸣 . 基于时空轨迹法的近10年间北极地区海冰的时空变化[J]. 中国科学院大学学报, 2015 , 32(6) : 743 -750 . DOI: 10.7523/j.issn.2095-6134.2015.06.004
As an important component of the global climate, Arctic sea ice is considered as an indicator of climate change. The study on the temporal change in the Arctic sea ice has the valuable theoretical importance for the global climate system as well as the practical significance in opening new shipping channels. In this study, we use 10 years' AMSR-E L2 products, which include the daily ice concentration of the Arctic sea, to calculate the monthly ice concentration, and then we analyze the change trajectories of ice concentration. The results show that the ice density in Arctic sea considerably decreased in these years. Generally, the Arctic ice cover reaches its peak in January and reaches its lowest record in September. Because of the rapid decline of sea ice, the ice between the Arctic and lands begins to vanish for few months in a year, which increases the likelihood of activities at Arctic sea, for example, opening up a new channel.
Key words： Arctic; remote sensing; AMSR-E; trajectory; sea ice
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