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    Identifying and Quantifying Tree-Ring Chronology Variance Artefacts Related to Co-Occurring Changes in Growth Rate

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    Author
    Fowler, Anthony M.
    Boswijk, Gretel
    Lorrey, Andrew
    Issue Date
    2019-08-07
    Keywords
    heteroscedasticity
    variance artefacts
    kauri
    Agathis australisagathis-australis kauri
    
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    Citation
    Anthony M. Fowler, Gretel Boswijk, and Andrew Lorrey "IDENTIFYING AND QUANTIFYING TREE-RING CHRONOLOGY VARIANCE ARTEFACTS RELATED TO CO-OCCURRING CHANGES IN GROWTH RATE," Tree-Ring Research 75(2), 139-151, (7 August 2019). https://doi.org/10.3959/1536-1098-75.2.139
    Journal
    Tree-Ring Research
    URI
    http://hdl.handle.net/10150/675609
    DOI
    10.3959/1536-1098-75.2.139
    Additional Links
    https://www.treeringsociety.org/
    Abstract
    Expectations that a warming world will be associated with more hydro-climatological extremes has motivated research exploring if an associated signal is evident in paleoclimate archives. Tree-ring chronologies are central to this work because of their high temporal resolution, but they are also potentially compromised by variance artefacts associated with the evolving composition of the chronology and with data processing. Here we present two empirical methods to identify and quantify potential artefacts related specifically to temporally varying growth rate (local level, LL): LL-based partitioning analysis and LL-based chronology stripping. The two methods were developed and tested using a multi-site New Zealand kauri (Agathis australis) living-tree data set. Our results show that the methods are complementary in terms of artefact identification and quantification, and that they can provide useful insight into causal processes when used conjointly. Our results also indicate that data pre-processing to remove LL-related artefacts may be sub-optimal, that there may be an optimal standardization that minimizes bias, and that the evolving variance of kauri master chronologies over the last 500 years is not significantly affected by LL-related artefacts.
    Type
    Article
    text
    Language
    en
    ISSN
    1536-1098
    EISSN
    2162-4585
    ae974a485f413a2113503eed53cd6c53
    10.3959/1536-1098-75.2.139
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    Tree-Ring Research, Volume 75, Issue 2 (Aug 2019)

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