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    Snowpack reconstructions incorporating climate in the Upper Green River Basin (Wyoming)

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    Author
    Anderson, S.
    Moser, C.L.
    Tootle, G.A.
    Grissino-Mayer, H.D.
    Timilsena, J.
    Piechota, T.
    Issue Date
    2012-07
    Keywords
    dendrochronology
    snowpack reconstruction
    Southern Oscillation
    tree rings
    Upper Green River Basin
    
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    Citation
    Anderson, S., Moser, C.L., Tootle, G.A., Grissino-Mayer, H.D., Timilsena, J., Piechota, T., 2012. Snowpack reconstructions incorporating climate in the Upper Green River Basin (Wyoming). Tree-Ring Research 68(2):105-114.
    Publisher
    Tree-Ring Society
    Journal
    Tree-Ring Research
    URI
    http://hdl.handle.net/10150/630477
    DOI
    10.3959/2011-8.1
    Additional Links
    http://www.treeringsociety.org
    Abstract
    The Green River is the largest tributary of the Colorado River. Given that snowpack is the primary driver of streamflow, information on the long-term regional snowpack (regionalized April 1 Snow Water Equivalent (SWE)) variability would provide useful information for water managers and planners. Previous research efforts were unable to develop skillful SWE reconstructions using tree-ring chronologies in the Upper Green River Basin (UGRB) of Wyoming because of limited tree-ring chronologies in the area. The current research uses Principal Components Analysis to regionalize April 1 snowpack data in the UGRB. Recent research efforts developed six new tree-ring chronologies in and adjacent to the UGRB. These new chronologies, along with 38 existing chronologies, were correlated with the regionalized SWE data. Chronologies positively correlated at a 95% confidence level or higher were retained. Stepwise linear regressions were performed and a reconstruction of UGRB regional April 1 SWE was achieved (R2  =  0.21). Climate signals (Pacific Decadal Oscillation (PDO) and Southern Oscillation Index (SOI)) were introduced to the predictor variables and an additional regression was performed. Inclusion of the SOI resulted in a statistically skillful reconstruction (R2  =  0.58). Temporal drought periods for SWE and for streamflow were examined for the UGRB and a direct relationship was observed.
    Language
    en
    ISSN
    2162-4585
    1536-1098
    ae974a485f413a2113503eed53cd6c53
    10.3959/2011-8.1
    Scopus Count
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    Tree-Ring Research, Volume 68, Issue 2 (Jul 2012)

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