Glims glacial map12/28/2023 Geological Survey (Flagstaff, Arizona), and is currently coordinated by the University of Arizona (Tucson). GLIMS was initiated and originally coordinated by the U.S. RCs are provided with “ GLIMSView ”, a cross-platform computer application specifically developed to analyze satellite imagery such as from the Advanced Spaceborne Thermal Emis- sion and Reflection Radiometer (ASTER) and Landsat, digitize glacier outlines, attach GLIMS-specific metadata, and package the data for import into the GLIMS database. The RCs include a network of collaborating Stewards, who may be responsible, for instance, for the analysis of a single glacier or may take on broader roles. GLIMS is orga- nized into a system of Regional Centers (RCs), which divides the world's glacierized areas into manageable sub- regions, based mostly on political boundaries. The goal of GLIMS is to acquire satellite multispectral images of the world's glaciers and analyze them for glacier extent and changes, and to understand these change data in terms of climatic and other forcings (Kieffer et al., 2000 The scope of GLIMS requires an international consortium, which currently in- volves researchers from 27 countries. The advent of plentiful satellite imagery, widely available sophisticated image processing software, and in- expensive computers with large amounts of data storage has led to the formation of GLIMS, which aims to build on and improve the world inventory of glacier data. While the WGI is a valuable database that continues to be used to study changes in the cryosphere, its design was limited to the technology of its time, and it was not designed to store certain kinds of information valuable to studies of glacier change, such as glacier outlines and hypsometry. The WGMS compiled the World Glacier Inventory (WGI, IAHS-UNEP-UNESCO, 1989 Haeberli, 1998), and this effort represents the first real attempt at an inventory at the global scale. Small numbers of glaciers have been monitored through field measurements for decades (Braithwaite, 2002), and a handful of inventories have been compiled, most of them at no larger than regional scales. There are an estimated 160 000 glaciers on Earth (Meier and Bahr, 1996). The project described in this paper, Global Land Ice Measurements from Space (GLIMS), is meant to fit into these programs and extend existing glacier inventories. Intergovernmental Oceanographic Commission (IOC), the United Nations Environment Programme (UNEP) and the International Council of Scientific Unions (ICSU) (Haeberli, 2004).
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