TY  - Data
T1  - Calving front positions for Greenland outlet glaciers (2002–2021): a spatially extensive seasonal record and benchmark dataset for algorithm validation
A1  - Jiang Liming
DO  - 10.5281/zenodo.15695148
PY  - 2025
DA  - 2025-11-27
PB  - National Cryosphere Desert Data Center
AB  - The changes in the position of the front of Greenland glacier collapse reflect the magnitude and trend of glacier advance and retreat, which is crucial for understanding ice sheet dynamics. This dataset provides location records of glacier collapse frontiers covering the entire Greenland region, with a wide spatial range and seasonal resolution. Contains approximately 12000 manually mapped collapse front location data of outflow glaciers from 2002 to 2021. These designated data are sourced from multiple satellite imagery sources, including Landsat 5/7/8, Sentinel-1/2, MODIS, ENVISAT ASAR, and ERS SAR. All disintegration frontier locations were manually digitized using standardized workflows using GEEDiT (Google Earth Engine digital image processing tool) and ArcGIS (geographic information system software), with detailed metadata attached. To evaluate the positioning accuracy, this dataset was compared with high-resolution PlanetScope images and benchmark datasets. The results showed that due to the influence of image quality and glacier front complexity, the position deviation was about 40-100 meters. This dataset provides spatially consistent high-quality benchmark data for studying glacier dynamics, optimizing ice sheet model boundary conditions, and developing and validating automatic glacier front tracking algorithms.
DB  - NCDC
UR  - http://www.ncdc.ac.cn/portal/metadata/8d3fa175-e7ae-4dab-99ef-6249e36a3922
ER  -