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    Application of the Minimum Blue-Intensity Technique to A Southern-Hemisphere Conifer

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    Author
    Brookhouse, M.
    Graham, R.
    Issue Date
    2016-07
    Keywords
    Australian Alps
    dendroclimatology
    growing season
    maximum temperature
    Podocarpus lawrencei
    teleconnection
    
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    Citation
    Brookhouse, M., & Graham, R. (2016). Application of the Minimum Blue-Intensity Technique to A Southern-Hemisphere Conifer. Tree-Ring Research, 72(2), 103–107.
    Publisher
    Tree Ring Society
    Journal
    Tree-Ring Research
    URI
    http://hdl.handle.net/10150/662828
    DOI
    10.3959/1536-1098-72.02.103
    Additional Links
    http://www.treeringsociety.org
    Abstract
    Minimum blue-intensity (BI) appears to be a viable source of proxy-temperature data, but is yet to be applied to a Southern-Hemisphere species. Here, we apply the BI technique to Podocarpus lawrencei, a conifer endemic to the Australian Alps. We develop sample-preparation protocols and examine the climate sensitivity of resulting tree-ring width (TRW) and BI chronologies. We found that extractable resins were removed from P. lawrencei samples after 28 hours of Soxhlet extraction and a highly-significant negative correlation (r =-0.79, p<0.0001) exists between the resulting BI chronology and growing season (August-April) temperature maxima. The climate sensitivity of our BI data, combined with an apparent teleconnection with a previously-reported dataset, suggests that an unparalleled opportunity exists to develop a powerful proxy for growing-season temperatures in southeast Australia. © 2016 by The Tree-Ring Society.
    Type
    Article
    text
    Language
    en
    ISSN
    1536-1098
    EISSN
    2162-4585
    ae974a485f413a2113503eed53cd6c53
    10.3959/1536-1098-72.02.103
    Scopus Count
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    Tree-Ring Research, Volume 72, Issue 2 (Jul 2016)

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