edu.ucar.gdex::d315000 eng; USA utf-8 dataset NSF NCAR Geoscience Data Exchange datahelp@ucar.edu https://gdex.ucar.edu NSF NCAR Geoscience Data Exchange The Geoscience Data Exchange (GDEX), managed by the Computational and Information Systems Laboratory (CISL) at NSF NCAR, contains a large collection of meteorological, atmospheric composition, and oceanographic observations, and operational and reanalysis model outputs, integrated with NSF NCAR High Performance Compute services to support atmospheric and geosciences research. download pointOfContact 2026-04-21T01:56:03Z ISO 19115 Geographic Information - Metadata ISO19115:2003/Cor 1 2006 https://doi.org/10.5065/3842-MY85 Northern Hemisphere Weekly and Monthly Snow Cover d315000 1985-04-17 publication Dewey, Kenneth F. author Heim Jr., Richard R. author NSF National Center for Atmospheric Research publisher The U.S. National Earth Satellite Service (NESS) created hand-drawn Northern Hemisphere maps of snow and ice boundaries on a weekly basis starting in 1966. A satellite meteorologist would use visible satellite data to determine the change in snow and ice boundaries from the previous week, and confirm any drastic changes with surface station observations. Since these maps were the only complete record of snow and ice extent, providing spatially-continuous coverage versus the historical daily point observations taken mainly in populated areas, they were digitized by the Climatology Program at the University of Nebraska onto a 190.5 km resolution polar-stereographic grid, and then objectively analyzed to produce various other snow cover products. completed datahelp@ucar.edu pointOfContact notPlanned dataset https://gdex.ucar.edu/images/ds_logos/default_200_200.png Logo thumbnail from URL png ASCII dataset Resource Type 2021-03-30 revision 4.4 DataCite Metadata Working Group orginator resourceTypeGeneral GRIDDING METHODS U.S. National Aeronautics and Space Administration Global Change Master Directory GCMD 2026-04-15 revision 23.7 NASA Global Change Master Directory orginator Valids List: Platforms EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SNOW/ICE > SNOW COVER U.S. National Aeronautics and Space Administration Global Change Master Directory GCMD 2026-04-15 revision 23.7 NASA Global Change Master Directory orginator Valids List: Science and Services Keywords Creative Commons Attribution 4.0 International License None eng utf-8 climatologyMeteorologyAtmosphere 1966-11 1991-12 NSF NCAR Geoscience Data Exchange datahelp@ucar.edu https://gdex.ucar.edu distributor 16.224 https://gdex.ucar.edu/datasets/d315000/ https Dataset Description Related Link information https://gdex.ucar.edu/datasets/d315000/dataaccess/ https Data Access Related Link download none asNeeded