Ice front and Mélange Dynamics at Kangerlussuaq Glacier, eastern Greenland, since 1981, and future stability

This dataset contains measurements of the jam-packed ice mélange (JPM) extent in front of Kangerlussuaq Glacier, eastern Greenland, from 1978 to 2021. The mélange extent was manually delineated from satellite imagery, including Landsat (NDWI and optical) and SAR data (ERS-1/2). It includes measurements of both the JPM and the total mélange length, with a maximum length set at 28.95 km, extending beyond the fjord, typically reached before the calving season begins. The dataset provides satellite platform details in the final column, with missing values indicated by "N/A".本数据集包含1978年至2021年格陵兰东部康克鲁斯瓦格冰川（Kangerlussuaq Glacier）前缘挤密冰群（jam-packed ice mélange，JPM）的覆盖范围测量数据。该冰群的覆盖范围通过卫星影像人工解译得到，所用影像包括陆地卫星（Landsat）的归一化差异水体指数（Normalized Difference Water Index，NDWI）影像与光学影像，以及合成孔径雷达（Synthetic Aperture Radar，SAR）数据（搭载于欧洲遥感卫星1号/2号（European Remote-Sensing Satellite 1/2，ERS-1/2）的SAR数据）。数据集同时收录了挤密冰群与冰群总长度的测量数据，其中最大长度设定为28.95 km，该长度常超出峡湾范围，且通常在冰山崩解季开始前即可达到。数据集最后一列标注了所用卫星平台的详细信息，缺失值以"N/A"表示。