Experiments have been carried out to assess the consistency of the database, and protocols have been defined for the RCs to follow in their mapping.
#Glims database astor how to#
For example, the GLIMS community has formulated definitions for how to delineate glaciers with different complicated morphologies and how to deal with debris cover. As glacier mapping with GLIMS has progressed, various hurdles have arisen that have required solutions. Glacier data and the ASTER metadata can be viewed and searched via interactive maps at. In addition, the database contains metadata on approximately 200 000 ASTER images acquired over glacierized terrain.
The database contains approximately 80 000 glacier outlines, half the estimated total on Earth. The analysis results are collected at the National Snow and Ice Data Center (NSIDC) and ingested into the GLIMS Glacier Database. The GLIMS programme includes 70 institutions, and 25 Regional Centers (RCs), who analyze satellite imagery to map glaciers in their regions of expertise. NSIDC also provides information on more than 130,000 glaciers through the World Glacier Inventory.GLIMS (Global Land Ice Measurements from Space) is an international initiative to map the world's glaciers and to build a GIS database that is usable via the World Wide Web. The Randolph Glacier inventory is not currently accessible through NSIDC but is available from the GLIMS project website. It includes detailed outlines of the extent of each glacier, with images in the inventory spanning from 1999 to 2010. 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.
#Glims database astor plus#
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. Exchange for Observations and Local Knowledge of the Arctic (ELOKA).
#Glims database astor archive#
NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).Greenland Today & Antarctic Ice Sheet Today.A part of CIRES at the University of Colorado Boulder
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