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This document provides a description of the CDR dataset provided by the C3S Glacier Change Service to the Climate Data Store (CDS). The Glacier Change Service addresses the essential climate variable (ECV) Glacier and provides a globally gridded product of annual mass changes with a spatial resolution of 0.5° x 0.5° covering the hydrological years from 1975/76 to 2020/21. The product was computed by combining the temporal variability from glaciological in-situ observations with multiannual to decadal trends from air- and spaceborne geodetic observation. As input data, our product builds on both glaciological and geodetic time series from individual glaciers as available from the latest version of the Fluctuations of Glaciers (FoG, WGMS, 2022) database of the World Glacier Monitoring Service (WGMS; https://wgms.ch). As auxiliary data, glacier area is used from the Randolph Glacier Inventory (RGI, version 6.0; RGI 2017) which is available from the CDS as brokered product (RD1, https://cds.climate.copernicus.eu/cdsapp#!/datasetdatasets/insitu-glaciers-extent?tab=overview).
In the present document, we provide a brief summary on the background of our data product in Section 1.1, followed by target requirements, product description and data usage information in Section 1.2. Information on data access is provided in Section 2.
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Glacier data will be made available through the Copernicus Climate Data Store (CDS) web-based service, which is the sole data distributor (https://cds.climate.copernicus.eu/cdsapp#!/home). A free of charge registration is required to access the CDS and all its toolbox software. Data can be downloaded directly from the website and used under the License to Use Copernicus Products (also included on download page). Data may also be viewed directly online. All requests for information or further data should be channelled through the CDS Knowledge Base at https://confluence.ecmwf.int//display/CKB/.
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