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    Coral record of southeast Indian Ocean marine heatwaves with intensified Western Pacific temperature gradient

    239571_234892 supp.pdf (3.320Mb)
    234892_234892.pdf (1.077Mb)
    Access Status
    Open access
    Authors
    Zinke, Jens
    Hoell, A.
    Lough, J.
    Feng, M.
    Kuret, A.
    Clarke, H.
    Ricca, V.
    Rankenburg, K.
    McCulloch, M.
    Date
    2015
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Zinke, J. and Hoell, A. and Lough, J. and Feng, M. and Kuret, A. and Clarke, H. and Ricca, V. et al. 2015. Coral record of southeast Indian Ocean marine heatwaves with intensified Western Pacific temperature gradient. Nature Communications. 6: 8562.
    Source Title
    Nature Communications
    DOI
    10.1038/ncomms9562
    ISSN
    2041-1723
    School
    Department of Environment and Agriculture
    Remarks

    This open access article is distributed under the Creative Commons license http://creativecommons.org/licenses/by/4.0/

    Supplementary information is available at http://www.nature.com/article-assets/npg/ncomms/2015/151023/ncomms9562/extref/ncomms9562-s1.pdf

    URI
    http://hdl.handle.net/20.500.11937/48031
    Collection
    • Curtin Research Publications
    Abstract

    Increasing intensity of marine heatwaves has caused widespread mass coral bleaching events, threatening the integrity and functional diversity of coral reefs. Here we demonstrate the role of inter-ocean coupling in amplifying thermal stress on reefs in the poorly studied southeast Indian Ocean (SEIO), through a robust 215-year (1795-2010) geochemical coral proxy sea surface temperature (SST) record. We show that marine heatwaves affecting the SEIO are linked to the behaviour of the Western Pacific Warm Pool on decadal to centennial timescales, and are most pronounced when an anomalously strong zonal SST gradient between the western and central Pacific co-occurs with strong La Niña's. This SST gradient forces large-scale changes in heat flux that exacerbate SEIO heatwaves. Better understanding of the zonal SST gradient in the Western Pacific is expected to improve projections of the frequency of extreme SEIO heatwaves and their ecological impacts on the important coral reef ecosystems off Western Australia.

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