摘要
围绕国内外机构发布的南极被动微波海冰密集度产品(PM-SIC)的差异和精度问题,应用MODIS和Sentinel-1反演的海冰密集度,对德国不莱梅大学(产品UB-AMSR2/ASI)、美国冰雪数据中心(产品NSIDC-SSMIS/NT、NSIDC-SSMIS/CDR、NSIDC-AMSR2/NT2)、欧洲气象卫星应用组织海洋与海冰卫星应用中心(产品OSI-SAF/BR-BST)、国家卫星海洋应用中心(产品NSOAS-SMR/NT)和国家卫星气象中心(产品NSMC-MWRI/NT2)发布的7种南极海冰密集度产品进行比较与评估。结果表明:(1)NSIDC-SSMIS/NT与NSIDC-SSMIS/CDR海冰密集度具有较高的一致性(平均偏差为-0.08%,相关系数为0.99),NSOAS-SMR/NT与NSIDC-AMSR2/NT2间的差异最大(平均偏差为-14.41%,相关系数为0.81);(2)7种PM-SIC的变化趋势一致,NSOAS-SMR/NT和NSMC-MWRI/NT2与其他PM-SIC的偏差具有明显的季节性差异;(3)NSOAS-SMR/NT和NSMC-MWRI/NT2与其他PM-SIC均在印度洋扇区、别林斯高晋海和阿蒙森海扇区绝对偏差较大,在罗斯海扇区差异最小。偏差较大的区域主要分布在海冰边缘区及近陆地海域,在高密集度区域差异较小;(4)应用MODIS与Sentinel-1反演的海冰密集度对7种PM-SIC验证表明,NSMC-MWRI/NT2与验证数据的一致性最高。NSOAS-SMR/NT、UB-AMSR2/ASI和OSI-SAF/BR-BST海冰密集度偏低,而NSMC-MWRI/NT2、NSIDC-AMSR2/NT2、NSIDC-SSMIS/CDR和NSIDC-SSMIS/NT海冰密集度偏高。不同海冰密集度产品的比较与评估可为发展遥感反演算法、研制和应用高质量的海冰密集度产品,更好地监测南极海冰动态变化提供依据和参考。
Focused on the differences and accuracy of passive microwave sea ice concentration products(PM-SIC)released by domestic and foreign institutions,the sea ice concentration retrieved by MODIS and Sentinel-1 is analyzed.The products of University of Bremen(UB-AMSR2/ASI),National Snow and Ice Data Centre(NSIDC-SSMIS/NT,NSIDC-SSMIS/CDR,NSIDC-AMSR2/NT2),European Organization for the Exploitation of Meteorological Satellites(OSI-SAF/BR-BST),National Satellite Ocean Application Service(NSOAS-SMR/NT)and the National Satellite Meteorological Center(NSMC-MWRI/NT2)were conducted.The results show that:(1)The sea ice concentration of NSIDC-SSMIS/NT and NSIDC-SSMIS/CDR has a high consistency(mean deviation of−0.08%,correlation coefficient of 0.99),and the difference between NSOAS-SMR/NT and NSIDC-AMSR2/NT2 is the largest(mean deviation of−14.41%,correlation coefficient of 0.99);(2)The variation trends of the seven PM-SIC are consistent,and the deviations of NSOAS-SMR/NT and NSMC-MWRI/NT2 show obvious seasonal differences with other PM-SIC;(3)The absolute deviation between NSOAS-SMR/NT,NSMC-MWRI/NT2 and other PM-SIC sectors is large in the Indian Ocean sector,Bellingshausen Sea and Amundsen Sea sector,and the difference is the smallest in the Ross Sea sector.The area with large deviation is mainly distributed in the sea ice margin area and near the land sea,and the difference is small in the high sea ice concentration area;(4)Seven PM-SIC are validated by the MODIS and Sentinel-1 retrieved sea ice concentration,and the consistency between NSMC-MWRI/NT2 and validation data is the highest.sea ice concentration of NSOAS-SMR/NT,UB-AMSR2/ASI and OSI-SAF/BR-BST was low,while the sea ice concentration of NSMC-MWRI/NT2,NSIDC-AMSR2/NT2,NSIDC-SSMIS/CDR and NSIDC-SSMIS/NT is high.The comparison and evaluation of different sea ice intensity products can provide the basis and reference for the development of remote sensing inversion algorithm,the development and application of high-quality sea ice intensity products,and the better monitoring of Antarctic sea ice changes.
作者
郭昊
季青
庞小平
石立坚
闫忠男
罗重鑫
Guo Hao;Ji Qing;Pang Xiaoping;Shi Lijian;Yan Zhongnan;Luo Chongxin(Chinese Antarctic Center of Surveying and Mapping,Wuhan University,Wuhan 430079,China;Key Laboratory of Polar Surveying and Mapping,Ministry of Nature Resources of the People's Republic of China,Wuhan 430079,China;National Satellite Ocean Application Service,Ministry of Nature Resources of the People's Republic of China,Beijing 100081,China)
出处
《海洋学报》
CAS
CSCD
北大核心
2023年第6期141-159,共19页
基金
国家自然科学基金(42076235)
中央高校基本科研业务费专项(2042022kf0018)。
关键词
海冰密集度
被动微波
遥感产品
MODIS
南极
sea ice concentration
passive microwave
remote sensing products
MODIS
Antarctic
