极地研究2025，Vol.37Issue(3)：437-452,16.DOI:10.13679/j.jdyj.20240007
基于FY-3D/MWRI数据的北极夏季海冰密集度反演优化方法研究
Enhanced Arctic summer sea ice concentration retrieval from FY-3D/MWRI
摘要
Abstract
Sea ice concentration is an important parameter to describe the characteristics of sea ice.It is of great significance to obtain accurate sea ice concentration for the study of global climate change.In this study,we improves the atmospheric correction effect of summer observed brightness temperature by optimizing the estimation of sea ice emissivity and initial sea ice concentration in the microwave radiative transfer model,thereby optimizing the retrieval results of sea ice concentration using passive microwaves.Based on the FY-3D/MWRI brightness temperature data from June to September 2019,four sets of Arctic sea ice concen-tration data(ASI2-FTP,ASI2-DTP,ASI2E-FTP,ASI2E-DTP)were obtained by using the original and en-hanced ASI2 algorithm(ASI2 and ASI2E)combined with fixed tie points and dynamic tie points(FTP and DTP).The results were evaluated by 14 MODIS images.The enhanced method can effectively improve the Arctic sea ice concentration retrieval in summer,which is particularly effective for the method based on fixed tie points.After enhancement,the root mean square error decreased from 21.9%to 15.43%,and the bias reduced from-12.40%to-6.01%.Among the four methods,the enhanced algorithm based on dynamic tie points(ASI2E-DTP)performs best,with a root mean square error of 14.33%and a bias of-4.53%.关键词
海冰密集度/ASI2算法/FY-3D/MWRI/大气校正/北极Key words
sea ice concentration/ASI2 algorithm/FY-3D/MWRI/atmospheric correction/Arctic引用本文复制引用
夏常伟,王鑫,叶玉芳,陈卓奇..基于FY-3D/MWRI数据的北极夏季海冰密集度反演优化方法研究[J].极地研究,2025,37(3):437-452,16.基金项目
广东省自然科学基金面上项目(2022A1515011545)、南方海洋科学与工程广东省实验室(珠海)创新团队建设项目(311021008)和风云卫星应用先行计划项目(FY-APP-2022.0201)资助 （2022A1515011545）
