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    • ABoVE: Landsat Tundra Greenness and Summer Air Temperatures, Arctic Tundra, 1985-2016

    Metadata Updated: December 7, 2023

    This dataset provides annual tundra greenness and summer air temperatures at a resolution of 50 km over the pan-Arctic tundra biome above 31.5 degrees over the time period 1985 to 2016. Annual tundra greenness was assessed using the maximum Normalized Difference Vegetation Index (NDVImax) derived from surface reflectance measured by sensors on the Landsat satellites. Summer air temperatures were quantified using the Summer Warmth Index (SWI) derived from an ensemble of five global temperature datasets. Tabular data include NDVImax, SWI, and estimates of uncertainty using Monte Carlo simulations at 45,334 vegetated sampling sites. Raster data provide (1) annual SWI from 1985 to 2016; (2) temporal trends in annual NDVImax and SWI from 1985 to 2016 and from 2000 to 2016; and (3) temporal correlations between annual NDVImax - SWI during these two periods. Each raster also includes estimates of uncertainty that were generated using Monte Carlo simulations. This dataset provides a new pan-Arctic product for assessing inter-annual variability in tundra using moderate resolution observations from the Landsat satellites.

    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 7, 2023

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Graphic Preview

    Tundra greenness and summer air temperature trends and correlations across the Arctic. Top panels (a-d) depict Landsat annual maximum Normalized Difference Vegetation Index (NDVImax) trends, summer warmth index (SWI) trends derived using an ensemble of five temperature datasets, and mean Spearman's correlation (rs) between annual NDVImax and SWI among sites from 1985 to 2016, while bottom panels (e-h) depict trends and correlations from 2000 to 2016. Areas that are barren or lacked adequate Landsat data for trend and correlation assessments are shown in black. Source: Berner et al., (2020)

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date December 1, 2022
    Metadata Updated Date December 7, 2023
    Publisher ORNL_DAAC
    Maintainer
    Identifier C2143401680-ORNL_CLOUD
    Data First Published 2021-09-17
    Language en-US
    Data Last Modified 2023-06-12
    Category ABoVE, 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 Berner, L.T., R. Massey, and S.J. Goetz. 2021. ABoVE: Landsat Tundra Greenness and Summer Air Temperatures, Arctic Tundra, 1985-2016. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/1893
    Graphic Preview Description Tundra greenness and summer air temperature trends and correlations across the Arctic. Top panels (a-d) depict Landsat annual maximum Normalized Difference Vegetation Index (NDVImax) trends, summer warmth index (SWI) trends derived using an ensemble of five temperature datasets, and mean Spearmans correlation (rs) between annual NDVImax and SWI among sites from 1985 to 2016, while bottom panels (e-h) depict trends and correlations from 2000 to 2016. Areas that are barren or lacked adequate Landsat data for trend and correlation assessments are shown in black. Source: Berner et al., (2020)
    Graphic Preview File https://daac.ornl.gov/ABOVE/guides/Tundra_Greeness_Temp_Trends_Fig1.png
    Harvest Object Id adce0849-ab2f-4027-b21e-f12521c36274
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://doi.org/10.3334/ORNLDAAC/1893
    Metadata Type geospatial
    Old Spatial -180.0 31.49 180.0 90.0
    Program Code 026:001
    Source Datajson Identifier True
    Source Hash add333178ef0892fad716a37436b90333773b5f106adda1cefd519bb9bf4b412
    Source Schema Version 1.1
    Spatial
    Temporal 1985-07-01T00:00:00Z/2016-08-31T23:59:59Z

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