摘要
随着全球气候变暖,北极海冰面积逐渐减小,冰厚逐渐变薄,海冰在海浪的影响下会变得很脆弱,容易断裂形成裂缝,更易形成冰间水道,有助于北极航道的通航。同时,冰间水道是极地地区海洋与大气之间热量与动量交换的重要通道之一,因此在全球气候变暖的背景下,分析冰间水道的形态学特征,对于研究北极海区的动量和热量收支以及预测航道通航具有重要意义。文中利用Hilditch的冰间水道骨架技术,基于Landsat8的图像数据,分析了9月楚科奇海和波弗特海附近冰间水道倾角、长度和冰间水道距离等冰间水道的分布特征。结果表明,此时冰间水道倾角的分布集中在74°～114°之间,冰间水道长度和距离变化范围较大,分别在2～3 km和50～220 m之间。
As global warming progresses,the Arctic sea ice area is gradually decreasing,with ice thickness becoming thiner.The more fragile sea ice influenced by the waves is conducive to the lead formation process which contributes to Arctic passage navigation.Moreover,the lead is one of the most important channels through which the air and the sea exchange heat and momentum.Therefore,the analysis on the morphological characteristics of the lead is significant for research of the momentum and heat balance in the Arctic and prediction of the navigation in the Arctic passage under the pretext of global warming.The distribution characteristics of the lead orientation,lead length and the lead spacing near the Chukchi and Beaufort Seas are analyzed in September based on Landsat8 imageries with the Hilditch Skeleton Method.The research results show that the distribution of the lead orientation is between 74°and 114°,but the length and spacing of the lead vary remarkably,ranging from 2 km to 3 km and from 50 m to 220 m,respectively.The lead length has more discrepancies among different images,compared with the spacing and the orientation.
作者
王玉
马玉贤
陈元
陈伟斌
WANG Yu;MA Yu-xian;CHEN Yuan;CHEN Wei-bin(National Marine Environment Monitoring Center,Dalian 110623,Liaoning Province,China)
出处
《海洋技术学报》
2019年第2期8-13,共6页
Journal of Ocean Technology
基金
海洋公益性行业科研专项资助项目(201505019
201505005)
国家海洋环境监测中心博士启动基金资助项目(2017-A-04)
关键词
卫星图像
冰间水道形态学特征
楚科奇海
波弗特海
satellite imagery
morphological characteristics of leads
Chukchi Sea
Beaufort Sea
