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    The stability of tide gauges in the South Pacific determined from multi-epoch geodetic levelling, 1992 to 2010

    192348_192348.pdf (658.5Kb)
    Access Status
    Open access
    Authors
    El-Mowafy, Ahmed
    Deo, M.
    Govind, R.
    Date
    2013
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Deo, Manoj Nilesh and Govind, Ramesh and El-Mowafy, Ahmed. 2013. The stability of tide gauges in the South Pacific determined from multiepoch geodetic levelling, 1992 to 2010. Marine Geodesy. 36 (3): pp. 261-284.
    Source Title
    Marine Geodesy
    DOI
    10.1080/01490419.2013.786003
    ISSN
    01490419
    Remarks

    This is an Author's Accepted Manuscript of an article published in the journal Marine Geodesy (2013), copyright Taylor & Francis, available online at: <a href="http://www.tandfonline.com/">http://www.tandfonline.com/</a> 10.1080/01490419.2013.786003

    URI
    http://hdl.handle.net/20.500.11937/20566
    Collection
    • Curtin Research Publications
    Abstract

    Tide gauge data is important for determining global or local sea level rise with respect to a global geocentric reference frame. Data from repeated precise levelling connections between the tide gauges and a series of coastal and inland benchmarks, including Continuous GPS (CGPS) benchmarks, are used to determine the stability of tide gauges at 12 locations in the South Pacific. The method for determining this stability is based on a constant velocity model which minimises the net movement amongst a set of datum benchmarks surveyed since the installation of the tide gauges. When assessed at a 95% confidence interval, and with the exception of the Solomon Islands, none of the tide gauges were found to be in motion relative to their CGPS benchmarks. The Solomon Islands estimate is considered to be unreliable since the CGPS benchmark was recently established and has been surveyed fewer than three times. In Tonga and Cook Islands, the tide gauges were found to be disturbed or affected by survey errors whereas the Vanuatu results were affected by earthquakes.

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