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    • Tree-Ring Bulletin, Volume 43 (1983)
    • Tree-Ring Bulletin, Vol. 43 (1983)
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    Filtering the Effects of Competition from Ring-Width Series

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    Author
    Blasing, T. J.
    Duvick, D. N.
    Cook, E. R.
    Affiliation
    Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee
    Lamont-Doherty Geological Observatory, Palisades, New York
    Issue Date
    1983
    Keywords
    Dendrochronology
    Tree Rings
    Broadleaves
    Dendroclimatology
    Trees
    Woody Plants
    
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    Rights
    Copyright © Tree-Ring Society. All rights reserved.
    Collection Information
    This item is part of the Tree-Ring Research (formerly Tree-Ring Bulletin) archive. It was digitized from a physical copy provided by the Laboratory of Tree-Ring research at The University of Arizona. For more information about this peer-reviewed scholarly journal, please email the Editor of Tree-Ring Research at editor@treeringsociety.org.
    Publisher
    Tree-Ring Society
    Journal
    Tree-Ring Bulletin
    Citation
    Norton, D.A. 1983. Modern New Zealand tree-ring chronologies I: Nothofagus solandri. Tree-Ring Bulletin 43:1-17.
    Abstract
    Spline functions were examined and compared with conventional polynomials for use in filtering nonclimatic variance from tree-ring width series. Both types of curve were fitted to ring-width series exhibiting particularly marked effects of competition and release from competition with neighboring trees during the last 100 years. Available climatic data from that interval were used to statistically evaluate the capabilities of each type of function for removing nonclimatic effects and preserving the climatic signal. The results suggest that both types of function can be used successfully for those purposes, though in the presence of extremely rapid changes in growth rate due to a sudden release from competition it may be necessary to divide the ring-width series into two segments and fit a separate curve to each segment. Tightly-fit polynomials seem to be about as effective as splines, but are less desirable from a computational point of view as, for example, when the magnitude of the (negative) exponents of the coefficients exceeds computer capacity. Further, a spline function can be prescribed from its frequency-response characteristics, so it is possible to specify in advance the extent to which it will filter out any potential climatic cycles.
    ISSN
    0041-2198
    Additional Links
    http://www.treeringsociety.org
    Collections
    Tree-Ring Bulletin, Vol. 43 (1983)

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