High-resolution spatio-temporal analysis of snowmelt over Antarctic Peninsula ice shelves from 2015 to 2021 using SAR images  

作　　者：Qi Zhu Huadong Guo Lu Zhang Dong Liang Xuting Liu Heng Zhou Yiting Gou 

机构地区：[1]Key Laboratory of Digital Earth Science,Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing,People’s Republic of China [2]International Research Center of Big Data for Sustainable Development Goals,Beijing,People’s Republic of China [3]University of Chinese Academy of Sciences,Beijing,People’s Republic of China

出　　处：《International Journal of Digital Earth》2023年第1期825-846,共22页国际数字地球学报（英文）

基　　金：supported by the Joint Funds of the National Natural Science Foundation of China[grant number U2268217];National Natural Science Foundation of China[grant number 41876226];Innovative Research Program of the International Research Center of Big Data for Sustainable Development Goals[grant number CBAS2022IRP02].

摘　　要：Ice shelves play an essential role in the dynamics of the Antarctic ice sheet.The surface meltwater is important,as it can irreversibly weaken ice shelves by exerting additional hydrostatic pressure.Therefore,high-resolution snowmelt products are urgently needed to accurately analyze melting patterns of ice shelves and further estimate mass loss.In this study,a new high-resolution(40 m)snowmelt dataset over all of the Antarctic Peninsula ice shelves larger than 100 km^(2) was developed based on the modified snowmelt detection framework by using a co-orbit normalization method.The dataset provides detailed snowmelt information on each ice shelf,including the image coverage,melting area and melting ratio every 5 days.The melting patterns of three typical ice shelves(George VI,Wilkins and Larsen C Ice Shelves)and the spatio-temporal melting distribution of the Antarctic Peninsula(AP)were further analyzed.The snowmelt information indicates that both the extent and duration of snowmelt have been increasing in the Antarctic Peninsula from 2015 to 2021,and we found that the snowmelt on the Antarctic Peninsula showed a spatial pattern of significantly intense snowmelt on the western side.We believe this study will provide essential data for ice shelf investigation to support otherfields of polar research.

关 键 词：Surface snowmelt ice shelf sentinel-1 imagery Antarctic Peninsula high resolution 

分 类 号：P73[天文地球—海洋科学]