北极海冰密集度产品的走航比较与冰情分析

Comparison and Analysis of Arctic Sea Ice Concentration Products during the Fifth Chinese Arctic Expedition

基于我国第五次北极科学考察"雪龙船"航迹资料,比较德国不莱梅大学发布的海冰密集度被动微波遥感数据产品,在此基础上分析我国第五次北极考察期间东北航线和高纬航线的海冰冰情。结果表明,对应"雪龙船"走航海冰观测的样本点,SSMIS平均海冰密集度高于AMSR2海冰密集度,整体偏差为9.2%;AMSR2海冰密集度产品在陆地边缘处相对于SSMIS信息缺失较少,质量更优;对时序AMSR2海冰密集度数据的分析表明,2012年北极东北航道的完全开通在8月中旬,8月下旬至9月初形成北极高纬航线。不同数据产品的比较分析可为更好地应用海冰密集度数据进行海冰变化研究和航线冰情监测提供依据和参考。

This study made comparison of sea ice concentration derived from SSMIS and AMSR2 passive mi- crowave images from Bremen University during the fifth Chinese arctic expedition. Results show that the value of SSMIS sea ice concentration is higher than that of AMSR2 at the sample points according to sea ice record ob- served aboard on the R/V Xulong, and the average bias between SSMIS and AMSR2 sea ice concentration is 9.2%. AMSR2 has a relative higher quality than SSMIS near the land. It finds that the Arctic Northeast Passage opened in the mid-August by analyzing the AMSR2 data, while the Arctic High-latitude Sea Route emerged in the latter August and early September. These results can be helpful for better using Bremen sea ice concentra- tion product, and providing some reference for the research of sea ice change and ship routing in the future.