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    Madagascar corals track sea surface temperature variability in the Agulhas Current core region over the past 334 years

    234888_234888.pdf (934.0Kb)
    Access Status
    Open access
    Authors
    Zinke, Jens
    Loveday, B.
    Reason, C.
    Dullo, W.
    Kroon, D.
    Date
    2014
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Zinke, J. and Loveday, B. and Reason, C. and Dullo, W. and Kroon, D. 2014. Madagascar corals track sea surface temperature variability in the Agulhas Current core region over the past 334 years. Scientific Reports. 4: 4393.
    Source Title
    SCIENTIFIC REPORTS
    DOI
    10.1038/srep04393
    ISSN
    2045-2322
    School
    Department of Environment and Agriculture
    Remarks

    This open access article is distributed under the Creative Commons license http://creativecommons.org/licenses/by-nc-nd/3.0/

    URI
    http://hdl.handle.net/20.500.11937/46402
    Collection
    • Curtin Research Publications
    Abstract

    The Agulhas Current (AC) is the strongest western boundary current in the Southern Hemisphere and is key for weather and climate patterns, both regionally and globally. Its heat transfer into both the midlatitude South Indian Ocean and South Atlantic is of global significance. A new composite coral record (Ifaty and Tulear massive Porites corals), is linked to historical AC sea surface temperature (SST) instrumental data, showing robust correlations. The composite coral SST data start in 1660 and comprise 200 years more than the AC instrumental record. Numerical modelling exhibits that this new coral derived SST record is representative for the wider core region of the AC. AC SSTs variabilities show distinct cooling through the Little Ice Age and warming during the late 18(th), 19th and 20th century, with significant decadal variability superimposed. Furthermore, the AC SSTs are teleconnected with the broad southern Indian and Atlantic Oceans, showing that the AC system is pivotal for inter-ocean heat exchange south of Africa.

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