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    Author(s): E.S. Euskirchen; A.D. McGuire; F.S. Chapin; T.S. Rupp
    Date: 2010
    Source: Canadian Journal of Forest Research. 40: 1336-1346
    Publication Series: Scientific Journal (JRNL)
    Station: Pacific Northwest Research Station
    PDF: Download Publication  (2.17 MB)

    Description

    In the boreal forests of Alaska, recent changes in climate have influenced the exchange of trace gases, water, and energy between these forests and the atmosphere. These changes in the structure and function of boreal forests can then feed back to impact regional and global climates. We examine the type and magnitude of the climate feedbacks from boreal forests in Alaska. Research generally suggests that the net effect of a warming climate is a positive regional feedback to warming. Currently, the primary positive climate feedbacks are likely related to decreases in surface albedo due to decreases in snow cover. Fewer negative feedbacks have been identified, and they may not be large enough to counterbalance the large positive feedbacks. These positive feedbacks are most pronounced at the regional scale and reduce the resilience of the boreal vegetation--climate system by amplifying the rate of regional warming. Given the recent warming in this region, the large variety of associated mechanisms that can alter terrestrial ecosystems and influence the climate system, and a reduction in the boreal forest resilience, there is a strong need to continue to quantify and evaluate the feedback pathways.

    Publication Notes

    • Visit PNW's Publication Request Page to request a hard copy of this publication.
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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Euskirchen, E.S.; McGuire, A.D.; Chapin, F.S., III; Rupp, T.S. 2010. The changing effects of Alaska's boreal forest on the climate system. Canadian Journal of Forest Research. 40: 1336-1346.

    Keywords

    resilience, climate, boreal forest, terrestrial ecosystems

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