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-res...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.展开更多
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].
文摘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.
