The Randolph Glacier Inventory, which is a global catalogue of glacier outlines, supplements GLIMS Glacier Database. ![]() The GLIMS Glacier Database enables scientists to map how glaciers have changed over time, allowing them to better understand the impacts these changes will have on water resources, downstream hazards, ecosystem changes, and global sea level rise. Since its inception, over 60 institutions in 28 nations worldwide have contributed to the GLIMS Glacier Database.īecause glaciers advance and retreat in response to environmental cues, including changes in temperature and precipitation, they are strong indicators of climate change. It is a collection of worldwide cooperative networks (Regional Centers) that map and analyze glacier fluctuations in their geographic region of expertise. The GLIMS initiative was established in 1999 by the joint U.S./Japan ASTER Science Team. These additional sources include other satellite observations, such as observations from Satellite Pour l’Observation de la Terre (SPOT) and EMI+, as well as maps, aerial photographs, and historical observations dating back to 1850.Ī sample image of Alaskan glaciers from the GLIMS glacier viewer application. Data are primarily derived from the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) instrument aboard the Terra satellite and the Landsat Enhanced Thematic Mapper Plus (ETM+), but other sources are also used. The collection includes data from approximately 70 percent of the world's 200,000 glaciers, and new glaciers are continually added. The glacier database includes measurements of glacier geometry, glacier area, snowlines, supraglacial lakes and rock debris, and other glacial attributes, as well as browse images. This data collection’s primary data product is the GLIMS Glacier Database. GLIMS is an international project to inventory the world’s glaciers and to create a comprehensive, global database of land ice through repeat surveys. The NSIDC DAAC GLIMS data collection includes data from the Global Land Ice Measurements from Space (GLIMS) initiative.
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