2026-07-18T06:07:09Zhttp://nsidc.org/api/dataset/metadata/oaioai:nsidc.org/STC_MODSCGDRF_HIST.0012025-10-07T16:38:05Zv0_otherv0_allnsidc
STC_MODSCGDRF_HIST.001Historical MODIS/Terra L3 Global Daily 500m SIN Grid Snow Cover, Snow Albedo, and Snow Physical PropertiesRittger, K., Lenard, S. J., Palomaki, R. T., Brodzik, M. J., Stillinger, T., Bair, E. H., Dozier, J. & Painter, T. H.Historical MODIS/Terra L3 Global Daily 500m SIN Grid Snow Cover, Snow Albedo, and Snow Physical Properties2024-12-19Boulder, Colorado USANSIDC: National Snow and Ice Data Center1false10.7265/f6j3-f387https://doi.org/10.7265/f6j3-f387STC_MODSCGDRF_HISTTechnical ContactNSIDCUser Servicesnsidc@nsidc.org1-303-492-61991-303-492-2468CIRES, 449 UCBUniversity of ColoradoBoulderCO80309-0449USAEARTH SCIENCETERRESTRIAL HYDROSPHERESNOW/ICEALBEDO EARTH SCIENCECRYOSPHERESNOW/ICESNOW DURATION EARTH SCIENCECRYOSPHERESNOW/ICESNOW FRACTION EARTH SCIENCECRYOSPHERESNOW/ICESNOW GRAIN SIZE EARTH SCIENCECRYOSPHERESNOW/ICESNOW RADIATIVE FORCING EARTH SCIENCECRYOSPHERESNOW/ICEVISIBLE SNOW DARKENING Climatology/Meteorology/AtmosphereMODIS-related projectMODISModerate-Resolution Imaging SpectroradiometerTerraEarth Observing System, Terra (AM-1)2000-03-012023-09-30complete-9090-180180CONTINENTNORTH AMERICAUNITED STATES OF AMERICA500 meters500 meters1 dayThese data are freely, openly, and fully accessible without restrictions.These data are freely, openly, and fully available to use without restrictions, provided that you cite the data according to the recommended citation at https://nsidc.org/about/data-use-and-copyright.EnglishCU/INSTAARNSIDCNational Snow and Ice Data Centerhttps://nsidc.org/Data Center ContactNSIDCUser Servicesnsidc@nsidc.org1-303-492-6199National Snow and Ice Data CenterCIRES, 449 UCBUniversity of ColoradoBoulderCO80309-0449USAFTPnetCDF-4This data set represents a spatially and temporally complete (STC) version of the MODIS Snow Covered Area and Grain-size (MODSCAG) and MODIS Dust Radiative Forcing in Snow (MODDRFS) data sets produced by the NASA Jet Propulsion Laboratory (JPL) and now produced and distributed by NSIDC DAAC as <a href="https://nsidc.org/data/modscgdrf_nrt/versions/1"> MODSCGDRF_NRT</a>. Data inputs for MODSCAG and MODDRFS used by the STC algorithm are derived from NASA historical MODIS/Terra surface reflectance data (<a href="https://lpdaac.usgs.gov/products/mod09gav006/">MOD09GA v006</a> before December 28, 2021 and <a href=https://lpdaac.usgs.gov/products/mod09gav061/>MOD09GA v061</a> onwards).
The STC algorithm includes a suite of processes to improve the accuracy of MODSCAG/MODDRFS and adds additional information, notably snow albedo with and without the darkening from light absorbing particles. The STC algorithm accounts for off-nadir MODIS viewing geometry by weighting observations using the satellite view angle. STC uses the time series of data to better identify clouds whereas MODSCAG and MODDRFS use spectral tests which frequently include errors of omission and commission. STC uses forest height and the associated fractional vegetation simultaneously retrieved by MODSCAG for the same date and time to create an on-the-ground snow cover fraction. Finally, viewable snow cover fraction is used to remove biased retrievals of other variables. The resulting data is interpolated, resulting in a near-complete dataset. In addition, while the MODSCAG data sets do not include snow albedo, STC calculates clean snow albedo and snow albedo darkened by light absorbing impurities assuming both horizontal and sloped surfaces.
This data set contains the following parameters: snow fraction (viewable and on the ground), snow albedo (clean and observed; on flat and on slope), snow darkening, snow radiative forcing, and snow grain size (from spectral mixture and the normalized difference grain size index). Data are available from 01 March 2000 to 30 September 2023 and are currently available for the western United States (MODIS tiles h08v04, h08v05, h09v04, h09v05, h10v04). MODIS tiles are provided in the Sinusoidal projection derived from input MOD09GA files. Additional tiles will be added over time. These data are provided in the netCDF-4 format with a Sinusoidal projection.VIEW RELATED INFORMATIONhttps://doi.org/10.7265/f6j3-f387User's GuideGET DATAftp://sidads.colorado.edu/pub/DATASETS/STC_MODSCGDRF_HIST_v1FTPCEOS IDN DIFVERSION 9.92024-12-192025-10-07NSIDCVersion SummaryInitial releaseNSIDCMinor VersionNSIDCCurrent Version1NSIDCLevel of ServiceBasicNSIDCFull Dataset CitationRittger, K., Lenard, S. J., Palomaki, R. T., Brodzik, M. J., Stillinger, T., Bair, E. H., Dozier, J. & Painter, T. H. (2024). <i>Historical MODIS/Terra L3 Global Daily 500m SIN Grid Snow Cover, Snow Albedo, and Snow Physical Properties</i>. (STC_MODSCGDRF_HIST, Version 1). [Data Set]. Boulder, Colorado USA. National Snow and Ice Data Center. <a href="https://doi.org/10.7265/f6j3-f387">https://doi.org/10.7265/f6j3-f387</a>. [<i><describe subset used if applicable></i>].NSIDCRetiredfalseNSIDCRelated Servicesapplication/vnd.nasa.cmr.umm+jsonfalsejroebuckmmt_service_12556S1962622169-NSIDCV0NSIDCV05service2023-04-25T21:20:48.786Zftp://sidads.colorado.edu/NSIDCV0_FTPNOT PROVIDED1FTP File SystemDownload data via FTP using an FTP client, command line utility or a script, e.g., Pythonhttps://nsidc.org/data/user-resources/help-center/how-access-data-using-ftp-client-command-line-wget-or-pythonVIEW RELATED INFORMATIONFTP Access GuidePublicationURLUSER SERVICESNSIDC User ServicesEmailnsidc@nsidc.orgDATA ACCESS/RETRIEVALDATA MANAGEMENT/DATA HANDLINGEARTH SCIENCE SERVICESThis is the most current release of this service. Last updated date is unknown.SERVICE PROVIDERNational Snow and Ice Data CenterNSIDCNational Snow and Ice Data Center home pagehttps://nsidc.org/National Snow and Ice Data Center home page.https://cdn.earthdata.nasa.gov/umm/service/v1.4UMM-S1.4ftp://sidads.colorado.edu/pub/DATASETS/STC_MODSCGDRF_HIST_v1