Greening of arctic Alaska, 1981-2001

Details Greening of arctic Alaska, 1981-2001 Greening of arctic Alaska, 1981-2001

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30thls3j&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 20, pp. HLS 3-1, CiteID 2067, DOI 10.1029/2003GL018268

Physics

23

Meteorology And Atmospheric Dynamics: Land/Atmosphere Interactions, Information Related To Geographic Region: Arctic Region, Global Change: Remote Sensing

Scientific paper

Here we analyzed a time series of 21-yr satellite data for three bioclimate subzones in northern Alaska and confirmed a long-term trend of increase in vegetation greenness for the Alaskan tundra that has been detected globally for the northern latitudes. There was a 16.9% (+/-5.6%) increase in peak vegetation greenness across the region that corresponded to simultaneous increases in temperatures. We also examined the changes for four specific vegetation types using an 11-yr finer resolution (1-km) satellite data and found that the temporal changes in peak and time-integrated greenness were greatest in areas of moist nonacidic tundra. These changes in greenness between 1981 and 2001 correspond approximately to a 171 g/m2 (+/-81 g/m2) increases in aboveground plant biomass for Alaskan tundra. This remotely sensed interpretation is conducted in the absence of long-term biomass records in the region.

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