%0 Dataset
%T The  Second  Chinese Glacier Inventory (Version 2)
%J National Cryosphere Desert Data Center
%I National Cryosphere Desert Data Center(www.ncdc.ac.cn)
%U http://www.ncdc.ac.cn/portal/metadata/40d37a35-a3bd-4afe-9991-b1623e1fbe65
%W NCDC
%R 10.12072/ncdc.db7698.2026
%A xie fu ming
%A liu shi yin
%K The  Second  Chinese Glacier Inventory;glaciers;Western China
%X Dataset AbstractThe Second Chinese Glacier Inventory (SCGI v1) was established using multi-source remote sensing imagery (Landsat TM/ETM+, ASTER, SPOT-5) and digital elevation models (DEMs) through band-ratioing, Normalized Difference Snow Index (NDSI) thresholding, manual editing, ridge-based drainage basin segmentation, and attribute assignment. SCGI v2 builds upon this foundation by incorporating cloud-reduced Landsat TM composite imagery (2007–2009) to map previously uninventoried regions. The dataset delivers vector glacier boundaries populated with standardized attributes, including GLIMS IDs, area, elevation metrics, slope, aspect, and acquisition dates. Spanning glacierized regions across western China (73.2°E–105.56°E, 27.0°N–49.6°N) at a nominal spatial resolution of 15–30 m, SCGI v2 provides a robust baseline for evaluating modern spatial glacier distribution, conducting regional inventory statistics, monitoring cryospheric changes, and updating glacier inventories.Data SourcesThe construction of SCGI v2 integrated multi-source satellite observations, legacy glacier inventories, DEMs, and auxiliary interpretation tools. The baseline SCGI v1 relied primarily on 562 EOS/Terra ASTER scenes (2003–2008), 212 Landsat TM/ETM+ scenes (2004–2011, including 29 ETM+ scenes), and 8 SPOT-5 scenes. Although SCGI v1 mapped ~85% of glaciers across western China, persistent cloud cover and seasonal snowpack in humid zones—specifically the southeastern Tibetan Plateau and western Sichuan and Yunnan provinces—prevented complete inventorying.To reconcile these data gaps, we generated cloud-reduced composite imagery from Landsat TM scenes acquired between 2007 and 2009, filtered for Day-of-Year (DOY) 200–330 with cloud cover <30%. Additionally, glacier outlines from the First Chinese Glacier Inventory (FCGI_V2) defined the spatial constraints for extraction, while ASTER GDEM v3 was used to extract watershed ridgelines and delineate individual glacier units. Auxiliary data