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    • High Resolution Global Contiguous SIF Estimates from OCO-2 SIF and MODIS, Version 2

    Metadata Updated: December 6, 2023

    This dataset provides spatially-contiguous global mean daily solar-induced chlorophyll fluorescence (SIF) estimates at 0.05 degree (approximately 5 km at the equator) spatial and 16-day temporal resolution from September 2014 through July 2020. This product was derived from Orbiting Carbon Observatory-2 (OCO-2) SIF observations and produced by training an artificial neural network (ANN) on the native OCO-2 SIF observations and MODIS BRDF-corrected seven-band surface reflectance along OCO-2's orbits. The trained ANN model was then applied to predict mean daily SIF (mW/m2/nm/sr) in OCO-2's gap regions based on MODIS reflectance and landcover. This framework was stratified by biomes and 16-day time steps. This dataset's high resolution and global contiguous coverage will greatly enhance the synergy between satellite SIF and photosynthesis measured on the ground at consistent spatial scales. Potential applications of this dataset include advancing dynamic drought monitoring and mitigation, informing agricultural planning and yield estimation, and providing a benchmark for upcoming satellite missions with SIF capabilities at higher spatial resolutions.

    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 December 1, 2022
    Metadata Updated Date December 6, 2023

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Graphic Preview

    Predicted spatially contiguous SIF in the first half of August 2015. The highest SIF values during this time period were observed in agricultural sectors in the Northern Hemisphere. Source: Data file sif_ann_201508a.nc

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date December 1, 2022
    Metadata Updated Date December 6, 2023
    Publisher ORNL_DAAC
    Maintainer
    Identifier C2207986708-ORNL_CLOUD
    Data First Published 2022-01-09
    Language en-US
    Data Last Modified 2023-07-17
    Category SIF-ESDR, 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 Yu, L., J. Wen, C.Y. Chang, C. Frankenberg, and Y. Sun. 2021. High Resolution Global Contiguous SIF Estimates from OCO-2 SIF and MODIS, Version 2. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/1863
    Graphic Preview Description Predicted spatially contiguous SIF in the first half of August 2015. The highest SIF values during this time period were observed in agricultural sectors in the Northern Hemisphere. Source: Data file sif_ann_201508a.nc
    Graphic Preview File https://daac.ornl.gov/SIF-ESDR/guides/Global_SIF_OCO2_MODIS_Fig1.png
    Harvest Object Id 3eeae80c-c368-41b6-bd54-7b7a5c1d254f
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://doi.org/10.3334/ORNLDAAC/1863
    Metadata Type geospatial
    Old Spatial -180.0 -90.0 180.0 90.0
    Program Code 026:001
    Source Datajson Identifier True
    Source Hash ec6db8db4a14166949ee2a00b3952e09301f4691946f0760a058bc7ab671bd70
    Source Schema Version 1.1
    Spatial
    Temporal 2014-09-01T00:00:00Z/2020-07-31T23:59:59Z

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