Pinning-point shear-zone fractures in Thwaites Eastern Ice Shelf (2002 - 2022)

These datasets include detailed digitized shapefiles of surface fractures (polylines) and internal mélange zones (polygons) within the pinning-point shear zone of the Thwaites Eastern Ice Shelf. They were created using high-resolution (15-meter) panchromatic bands from Landsat 7, 8, and 9, with data from 2002 to 2022. Monthly digitization from January 2020 to July 2022 was also performed using preprocessed Sentinel-1 Synthetic Aperture Radar (SAR) images. Each feature includes attributes such as length and orientation, recorded in the EPSG:3031 coordinate reference system, and detailed in the attribute table. Additional funding was received from NE/S006419/1本数据集涵盖思韦茨东冰架（Thwaites Eastern Ice Shelf）锚点剪切带（pinning-point shear zone）内的地表裂缝（surface fractures，多段线要素polylines）与内部混杂带（mélange zones，多边形要素polygons）的精细化数字化形状文件（digitized shapefiles）。该数据集依托2002年至2022年陆地卫星（Landsat）7、8、9号的15米高分辨率全色波段（panchromatic bands）数据制作完成；此外，研究团队还利用预处理后的哨兵1号（Sentinel-1）合成孔径雷达（Synthetic Aperture Radar, SAR）影像，开展了2020年1月至2022年7月的月度数字化工作。所有要素均包含长度、走向等属性信息，数据采用EPSG:3031坐标参考系统（coordinate reference system）存储，并在属性表（attribute table）中附有详细说明。本研究获得资助编号为NE/S006419/1的项目资助。