Long-Term Arctic Growing Season NDVI Trends from GIMMS 3g, 1982-2012

Description

This data set provides normalized difference vegetation index (NDVI) data for the arctic growing season derived primarily with data from Advanced Very High Resolution Radiometer (AVHRR) sensors onboard several NOAA satellites over the years 1982 through 2012. The NDVI data, which show vegetation activity, were averaged annually for the arctic growing season (GS; June, July and August). The products include the annual GS-NDVI values and the results of a cumulative GS-NDVI time series trends analysis. The data are circumpolar in coverage at 8-km resolution and limited to greater than 20 degrees N.These normalized difference vegetation index (NDVI) trends were calculated using the third generation data set from the Global Inventory Modeling and Mapping Studies (GIMMS 3g). GIMMS 3g improves on its predecessor (GIMMS g) in three important ways. First, GIMMS 3g integrates data from NOAA-17 and 18 satellites to lengthen its record. Second, it addresses the spatial discontinuity north of 72 degrees N, by using SeaWiFS, in addition to SPOT VGT, to calibrate between the second and third versions of the AVHRR sensor (AVHRR/2 and AVHRR/3). Finally, the GIMMS 3g algorithm incorporates improved snowmelt detection and is calibrated based on data from the shorter, arctic growing season (May-September) rather than the entire year (January-December).

Resources

Name Format Description Link
21 ORNL DAAC Data Set Documentation https://daac.ornl.gov/VEGETATION/guides/GIMMS3g_NDVI_Trends.html
21 Data set Landing Page DOI URL https://doi.org/10.3334/ORNLDAAC/1275
21 This link allows direct data access via Earthdata login https://daac.ornl.gov/daacdata/global_vegetation/GIMMS3g_NDVI_Trends/
21 Search results for publications that cite this dataset by its DOI. https://scholar.google.com/scholar?q=10.3334%2FORNLDAAC%2F1275
34 Browse Image https://daac.ornl.gov/graphics/browse/sdat-tds/1275_1_fit.png
21 Web Coverage Service for this collection. https://webmap.ornl.gov/wcsdown/dataset.jsp?ds_id=1275
21 The THREDDS location for this Collection. https://thredds.daac.ornl.gov/thredds/catalog/ornldaac/1275/catalog.html
21 USE SERVICE API https://opendap.earthdata.nasa.gov/
33 Data Set Documentation https://data.ornldaac.earthdata.nasa.gov/public/global_vegetation/GIMMS3g_NDVI_Trends/comp/GIMMS3g_NDVI_Trends.pdf

Tags

  • biosphere
  • vegetation
  • earth-science

Topics

Categories