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Aga circumpolar avhrr biomass 2010

Circumpolar Arctic Biomass (Raynolds et al 2012)

This map portrays an estimate of above ground plant biomass for the tundra biome based on trans-Arctic field data and AVHRR NDVI (Raynolds et al. 2012). Aboveground phytomass was sampled on transects along the Arctic bioclimate gradient in North America (1750 km long, 8 locations sampled 2003–2006) and Eurasia (1500 km, 5 locations sampled 2007–2010). The study locations were chosen to represent each of the five Arctic bioclimate subzones as displayed on the Circumpolar Arctic Vegetation Map (CAVM) – from Subzone A in the north where shrubs are absent, mosses and lichens are dominant, and bare ground is common, to Subzone E in the south which is characterized by complete ground cover and abundant dwarf shrubs. NDVI values for each phytomass sampling site were extracted from two different NDVI data sets with different spatial resolutions. The maximum NDVI for the specific year during which the phytomass data were collected for each sampling site was extracted from the 8 km GIMMS3g AVHRR data. The relationship between landscape-level zonal phytomass sampled along the Arctic transects and satellite NDVI values were compared using logarithmic regression (y = 0.383 lnx + 0.994, R2 = 0.94, p < 0.001). A logarithmic equation has been shown to best correlate with phytomass, since NDVI is asymptotically non-linear as it approaches its maximum value of 1 for areas with dense plant cover. The regression equation relating aboveground phytomass to the GIMMS3g data for the years sampled was applied to all pixels within that image to create a map showing the distribution of Arctic phytomass and to calculate an estimate of total Arctic aboveground phytomass.

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

Raynolds, M. K., D. A. Walker, H. E. Epstein, J. E. Pinzon, and C. J. Tucker. 2012. A new estimate of tundra-biome phytomass from trans-Arctic field data and AVHRR NDVI. Remote Sensing Letters 3:403-411.

Complete

Data and Resources

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    Download :: GIS Data

    aga_circumpolar_avhrr_biomass_2010_tif.zip (96.3 KB)

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    Download :: Publication

    Raynolds_et_al_2012_RSL_NDVI-biomass.pdf (994 KB)

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    Download :: Map Image

    aga_circumpolar_avhrr_biomass_2010.png (231 KB)

Status: Complete
Type: Data
Data Types: GIS, Image, Map
Primary Contacts
Name: Martha Raynolds
Email: mkraynolds@alaska.edu
Other Contacts
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/5495-circumpolar-arctic-biomass-raynolds-et-al-2012