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Aga circumpolar avhrr ndvi 1995

Circumpolar Arctic AVHRR NDVI Trend 1982-2008 (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

Map Themes: AVHRR Biomass 2010, AVHRR Biomass Trend 1982-2010, AVHRR False Color-Infrared 1993-1995, AVHRR NDVI 1993-1995, AVHRR NDVI Trend 1982-2010, AVHRR Summer Warmth Index 1982-2003, Bioclimate Subzone, Coastline and Treeline, Elevation, Floristic Provinces, Lake Cover, Landscape, Landscape Age, Substrate pH, Vegetation Layer

References

Bhatt, U. S., D. A. Walker, M. K. Raynolds, J. C. Comiso, H. E. Epstein, G. J. Jia, R. Gens, J. E. Pinzon, C. J. Tucker, C. E. Tweedie, and P. J. Webber. 2010. Circumpolar arctic tundra vegetation change is linked to sea ice decline. Earth Interactions 14:1-20. doi: 10.1175/2010EI1315.1171.

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Data and Resources

  • Download

    Download :: Publication

    Bhatt_et_al_2010_ERL.pdf (4.58 MB)

  • Download

    Download :: GIS Data

    circumpolar_avhrr_ndvi_trend_1982_2010_tif.zip (330 KB)

  • Download

    Download :: Map Image

    aga_circumpolar_avhrr_ndvi_trend_1982-2010.pdf (622 KB)

Status: Complete
Type: Data
Data Types: GIS, Report, Image, Map
Primary Contacts
Name: Uma Bhatt
Email: bhatt@gi.alaska.edu
Other Contacts
Name: Martha Raynolds
Email: mkraynolds@alaska.edu
Name: Alaska Geobotany Center (AGC)
Email: uaf-agc@alaska.edu
Primary Organizations
Type
Alaska Geobotany Center
Academic

Regions
Arctic

Collections
Circumpolar Arctic Vegetation Map
All Maps

Direct Record Link
http://agc.glynx.gina.alaska.edu/catalog/entries/5424-circumpolar-arctic-avhrr-ndvi-trend-1982-2008