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Circumpolar AVHRR NDVI Trend 1982-2010 (Bhatt et al 2010)

The normalized difference vegetation index (NDVI) is a measure of greenness. NDVI was calculated as: NDVI = (NIR - R) / (NIR + R), where NIR is the spectral reflectance in the AVHRR near-infrared channel (0.725-1.1 µm, channel 2) where light-reflectance from the plant canopy is dominant, and R is the reflectance in the red channel (0.5 to 0.68 µm, channel 1), the portion of the spectrum where chlorophyll absorbs maximally. Trend in Arctic NDVI was calculated from a linear regression of NDVI values for all years 1982-2010. Pixels with significant trends (p < 0.05) were retained.

Back to Circumpolar Arctic Vegetation Map

Data and Resources

  • Download
    Download :: Publication

    Bhatt_et_al_2010_ERL.pdf (4.58 MB)

  • Download
    Download :: Map Image

    aga_circumpolar_avhrr_ndvi_1995.jpg (261 KB)

  • Download
    Download :: GIS Data

    circumpolar_avhrr_ndvi_trend_1982_2010_tif.zip (330 KB)

Status: Complete
Type: Data
Data Types: GIS, Report, Image, Map
Primary Contact
Raynolds, Martha
ISO Topics
biota, environment, geoscientificInformation, imageryBaseMapsEarthCover

Geo-keywords
Arctic

Collection
All Maps, Circumpolar Arctic Vegetation Map

Direct Record Link
http://alaskaaga.gina.alaska.edu/catalogs/9547-circumpolar-avhrr-ndvi-trend-1982-2010-bhatt
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