Retrieval of snow depth on Antarctic sea ice from the FY-3D MWRI data

作     者：Zhongnan Yan Xiaoping Pang Qing Ji Yizhuo Chen Chongxin Luo Pei Fan Zeyu Liang Zhongnan Yan;Xiaoping Pang;Qing Ji;Yizhuo Chen;Chongxin Luo;Pei Fan;Zeyu Liang

作者机构：Chinese Antarctic Center of Surveying and MappingWuhan UniversityWuhan 430079China Key Laboratory of Polar Surveying and Mapping ScienceMinistry of Natural ResourcesWuhan 430079China 

出 版 物：《Acta Oceanologica Sinica》 (海洋学报（英文版）)

年 卷 期：2023年第42卷第12期

页      面：105-117页

核心收录：

学科分类：07[理学] 0707[理学-海洋科学] 0705[理学-地理学] 070501[理学-自然地理学] 

基　　金：The National Natural Science Foundation of China under contract No.42076235 the Fundamental Research Funds for the Central Universities under contract No.2042022kf0018 

主　　题：snow depth Antarctic sea ice passive microwave FY-3D 

摘      要：The snow depth on sea ice is an extremely critical part of the *** and understanding changes of snow depth on Antarctic sea ice is beneficial for research on sea ice and global climate *** Microwave Radiation Imager(MWRI)sensor aboard the Chinese FengYun-3D(FY-3D)satellite has great potential for obtaining information of the spatial and temporal distribution of snow depth on the sea *** comparing in-situ snow depth measurements during the 35th Chinese Antarctic Research Expedition(CHINARE-35),we took advantage of the combination of multiple gradient ratio(GR(36V,10V)and GR(36V,18V))derived from the measured brightness temperature of FY-3D MWRI to estimate the snow *** method could simultaneously introduce the advantages of high and low GR in the snow depth retrieval model and perform well in both deep and shallow snow *** on this,we constructed a novel model to retrieve the FY-3D MWRI snow depth on Antarctic sea *** new model validated by the ship-based observational snow depth data from CHINARE-35 and the snow depth measured by snow buoys from the Alfred Wegener Institute(AWI)suggest that the model proposed in this study performs better than traditional models,with root mean square deviations(RMSDs)of 8.59 cm and 7.71 cm,respectively.A comparison with the snow depth measured from Operation IceBridge(OIB)project indicates that FY-3D MWRI snow depth was more accurate than the released snow depth product from the *** Snow and Ice Data Center(NSIDC)and the National Tibetan Plateau Data Center(NTPDC).The spatial distribution of the snow depth from FY-3D MWRI agrees basically with that from ICESat-2;this demonstrates its reliability for estimating Antarctic snow depth,and thus has great potential for understanding snow depth variations on Antarctic sea ice in the context of global climate change.