Recent climate-driven increases in vegetation productivity for the western Arctic: evidence of an acceleration of the northern terrestrial carbon cycle

ABSTRACT: Northern ecosystems contain much of the global reservoir of terrestrial carbon that is potentially reactive in the context of near-term climate change. Annual variability and recent trends in vegetation productivity across Alaska and northwest Canada were assessed using a satellite remote...

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Bibliographic Details
Main Authors: J. S. Kimball, M. Zhao, A. D. Mcguire, F. A. Heinsch, W. M. Jolly, S. Kang, S. E. Euskirchen, K. C. Mcdonald, S. W. Running
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Published: 2007
Subjects:
Arctic
Canada
Climate change
Alaska
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.419.9418
http://www.lter.uaf.edu/pdf/1121_Kimball_Zhao_2007.pdf
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Summary:ABSTRACT: Northern ecosystems contain much of the global reservoir of terrestrial carbon that is potentially reactive in the context of near-term climate change. Annual variability and recent trends in vegetation productivity across Alaska and northwest Canada were assessed using a satellite remote sensing– based production efficiency model and prognostic simulations of the terrestrial carbon cycle from the Terrestrial Ecosystem Model (TEM) and BIOME–BGC (BioGeoChemical Cycles) model. Evidence of a small, but widespread, positive trend in vegetation gross and net primary production (GPP and NPP) is found for the region from 1982 to 2000, coinciding with summer warming of more than 1.8°C and subsequent relaxation of cold temperature constraints to

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