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

Data Set Overview

Data setLong-Term Arctic Growing Season NDVI Trends from GIMMS 3g, 1982-2012
DOI10.3334/ORNLDAAC/1275
Release date2015-03-13
ProjectVegetation Collection
Time Period1982-06-01 to 2012-08-31

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).

Documentation

Data set reference document

Citation

Guay, K.C., P.S.A. Beck, and S.J. Goetz. 2015. Long-Term Arctic Growing Season NDVI Trends from GIMMS 3g, 1982-2012. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/1275
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Project

Vegetation Collection: The ORNL DAAC compiles, archives, and distributes gridded data on vegetation from regional to continental scales.

Companion Files

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  • GIMMS3g_NDVI_Trends.pdf

Data Files

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Data File (Granule)File SizeDates
gimms3g_gs_ndvi_trend_8km_1982_2012_20deg_trend.tif 10.8MB 1982-06-01 - 2012-08-31
gimms3g_gs_ndvi_trend_8km_1982_2012_20deg_significance.tif 7.9MB 1982-06-01 - 2012-08-31
gimms3g_ndvi_1982-2012.nc4 115.2MB 1982-06-01 - 2012-08-31
gimms3g_gs_ndvi_trend_8km_1982_2012_20deg_landcover.tif 13.2MB 1982-06-01 - 2012-08-31

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NumberEarliest DateLastest DateNotes
Publications120162016Publications Citing this data set
Downloads5962015-03-172017-05-232679 total files downloaded