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    • NACP: MODIS Daily Land Incident 4-km PAR Images For North America, 2003-2005

    Metadata Updated: December 7, 2023

    This data set contains daily Moderate Resolution Imaging Spectroradiometer (MODIS) land incident photosynthetically active radiation (PAR) images over North America for the years 2003 - 2005 and was created to fill the need for daily PAR estimates. Incident PAR is the solar radiation in the range of 400 to 700 nm reaching the earth's surface and plays an important role in modeling terrestrial ecosystem productivity. The daily images were derived by integrating MODIS/Terra and MODIS/Aqua instantaneous PAR data where the instantaneous PAR data is estimated directly from Terra or Aqua MODIS 5-min L1b swath data (Liang et al., 2006 and Wang et al., 2010). The spatial distribution of this data set includes the MODIS tile subsets covering North America, Central America, portions of South America, and Greenland, available for the years 2003 - 2005. There are 45,376 *.hdf files with a spatial resolution of 4 km x 4 km in sinusoidal projection distributed by year in three compressed data files: 2003.zip, 2004.zip, and 2005.zip. Contained within each daily file are 4 separate image files: DirectPar, DiffusePAR, TotalPAR, and Observation Count. There are 46 MODIS tiles that cover the study area extent.

    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 May 30, 2023
    Metadata Updated Date December 7, 2023

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Graphic Preview

    MODIS overpass of North America based on the Terra and Aqua orbital simulation from GMT 12:00 to 24:00, June 16, 2006. From Wang et al. (2010).

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date May 30, 2023
    Metadata Updated Date December 7, 2023
    Publisher ORNL_DAAC
    Maintainer
    Identifier C2631225371-ORNL_CLOUD
    Data First Published 2012-12-21
    Language en-US
    Data Last Modified 2023-06-12
    Category NACP, 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 Liang, S., and D. Wang. 2012. NACP: MODIS Daily Land Incident 4-km PAR Images For North America, 2003-2005. ORNL DAAC, Oak Ridge, Tennessee, USA. http://dx.doi.org/10.3334/ORNLDAAC/1140
    Graphic Preview Description MODIS overpass of North America based on the Terra and Aqua orbital simulation from GMT 12:00 to 24:00, June 16, 2006. From Wang et al. (2010).
    Graphic Preview File https://daac.ornl.gov/NACP/guides/liang_figure1.jpg
    Harvest Object Id 7f2c8f0f-674d-4e6a-b9d2-9d54eb883ed0
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://doi.org/10.3334/ORNLDAAC/1140
    Metadata Type geospatial
    Old Spatial -180.0 0.0 0.0 90.0
    Program Code 026:001
    Source Datajson Identifier True
    Source Hash b90f61f170016e8d4f8475c531a34e73e28779fa4d4ed521a6ac7288679c518f
    Source Schema Version 1.1
    Spatial
    Temporal 2003-01-01T00:00:00Z/2005-12-31T23:59:59Z

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