基于船侧图像的北极太平洋扇区夏季海冰厚度时空变化研究  

STUDY OF THE SPATIOTEMPORAL VARIATIONS OF SUMMER SEA ICE THICKNESS IN THE PACIFIC ARCTIC SECTOR BASED ON SHIPSIDE IMAGES

作　　者：梅浩 卢鹏[1] 王庆凯[1,2] 曹晓卫 李志军[1] Mei Hao;Lu Peng;Wang Qingkai;Cao Xiaowei;Li Zhijun(State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024,China;School of Naval Architecture Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024 [2]大连理工大学船舶工程学院,辽宁大连116024

出　　处：《极地研究》2021年第1期37-48,共12页Chinese Journal of Polar Research

基　　金：国家重点研发计划项目(2016YFC1402702);国家自然科学基金(41922045,41906198,41676187,51639003)资助。

摘　　要：基于2003-2018年中国第二次至第九次北极科考中获取的走航船基图像数据对北极夏季太平洋扇区沿航线平整冰厚度的时空变化进行了统计分析。结果显示太平洋扇区在夏季融冰期沿航线海冰厚度主要分布在10~280 cm区间,各航次存在一定差异但海冰厚度均近似呈正态分布。8月上旬和中旬沿航线平均冰厚均以-2 cm·a^(-1)的梯度逐年减少。楚科奇海、波弗特海和北冰洋中央海域等各个子区域沿航线平均冰厚随年份线性减少的趋势均不显著。2°为间隔的不同纬度区间沿航线海冰厚度也近似呈正态分布,但集中分布范围存在差异。8月上旬和下旬的沿航线平均冰厚分别以2 cm·deg^(-1)和5 cm·deg^(-1)的梯度随纬度线性增加,北冰洋中央海域沿航线平均冰厚随纬度线性增加的趋势在各子区域中最为显著。Using the shipside images obtained during the second to ninth Chinese National Arctic Research Expeditions in summers of 2003–2018,the spatiotemporal variations of level sea ice thickness in the Pacific Arctic Sector were analyzed statistically.The results show that the sea ice thickness along the cruise tracks in the Pacific Sector during the summer melting period was mainly between 10 and 280 cm.Sea ice thickness distribution was approximately normal although there were differences between cruises.The average ice thickness has been decreasing each year between early and middle August at a rate of−2 cm·a^(−1).However,in the marginal seas such as the Chukchi and Beaufort Seas,and the central Arctic Ocean,no clear decline in ice thickness was identified.Sea ice thickness distributions at 2°latitude intervals were also approximately normal,although thickness ranges varied with latitude.The average ice thickness increased linearly with latitude by 2 cm·deg^(−1) in early August and 5 cm·deg^(−1) in late August.The largest increase in average ice thickness was in the central Arctic Ocean.

关 键 词：北极 海冰 冰厚 太平洋扇区 时空分布 

分 类 号：P731.15[天文地球—海洋科学]