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    • Snowmelt Timing Maps Derived from MODIS for North America, Version 2, 2001-2018

    Metadata Updated: December 6, 2023

    This data set provides snowmelt timing maps (STMs), cloud interference maps, and a map with the count of calculated snowmelt timing values for North America. The STMs are based on the Moderate Resolution Imaging Spectroradiometer (MODIS) standard 8-day composite snow-cover product MOD10A2 collection 6 for the period 2001-01-01 to 2018-12-31. The STMs were created by conducting a time-series analysis of the MOD10A2 snow maps to identify the DOY of snowmelt on a per-pixel basis. Snowmelt timing (no-snow) was defined as a snow-free reading following two consecutive snow-present readings for a given 500-m pixel. The count of STM values is also reported, which represents the number of years on record in the STMs from 2001-2018.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Created Date September 27, 2023
    Metadata Updated Date December 6, 2023

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Graphic Preview

    Mean snowmelt Day of Year (DOY) for the years 2001-2018 for North America. The DOY values for snowmelt timing were identified by observing the transition from snow-cover to no-snow for individual MODIS pixels throughout the annual melt period. Note: the projection of this image may not be the native projection of the data set.

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date September 27, 2023
    Metadata Updated Date December 6, 2023
    Publisher ORNL_DAAC
    Maintainer
    Identifier C2764725108-ORNL_CLOUD
    Data First Published 2020-01-28
    Language en-US
    Data Last Modified 2023-09-11
    Category Climate, geospatial
    Public Access Level public
    Bureau Code 026:00
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://data.nasa.gov/data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Citation OLeary III, D., D.K. Hall, M. Medler, R. Matthews, and A. Flower. 2019. Snowmelt Timing Maps Derived from MODIS for North America, Version 2, 2001-2018. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/1712
    Graphic Preview Description Mean snowmelt Day of Year (DOY) for the years 2001-2018 for North America. The DOY values for snowmelt timing were identified by observing the transition from snow-cover to no-snow for individual MODIS pixels throughout the annual melt period. Note: the projection of this image may not be the native projection of the data set.
    Graphic Preview File https://daac.ornl.gov/CLIMATE/guides/Snowmelt_timing_maps_V2_Fig1.png
    Harvest Object Id 1691ff20-c40d-4cb1-b037-f801ec982815
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://doi.org/10.3334/ORNLDAAC/1712
    Metadata Type geospatial
    Old Spatial -180.0 10.0 0.0 90.0
    Program Code 026:001
    Source Datajson Identifier True
    Source Hash 64c85fd8c9077e34d608927ba341c092b9e83a1e42b4299d44ce7eb65bdcfdbb
    Source Schema Version 1.1
    Spatial
    Temporal 2001-01-01T00:00:00Z/2018-12-31T23:59:59Z

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