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    Deglaciation-induced spatially variable sea level change: a simple-model case study for the Greenland and Antarctic ice sheets

    137784_20835_Kuhn_etal_IJOCS_revised.pdf (2.160Mb)
    Access Status
    Open access
    Authors
    Kuhn, Michael
    Featherstone, Will
    Makarynskyy, Oleg
    Keller, W.
    Date
    2010
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Kuhn, M. and Featherstone, W. and Makarynskyy, O. and Keller, W. 2010. Deglaciation-induced spatially variable sea level change: a simple-model case study for the Greenland and Antarctic ice sheets. International Journal of Ocean and Climate Systems. 1 (2): pp. 67-83.
    Source Title
    International Journal of Ocean and Climate Systems
    ISSN
    17593131
    Faculty
    Department of Spatial Sciences
    Faculty of Science and Engineering
    WA School of Mines
    URI
    http://hdl.handle.net/20.500.11937/35151
    Collection
    • Curtin Research Publications
    Abstract

    Some studies on deglaciation-induced sea-level change provide only a global average change, thus neglecting the fact that sea-level change is spatially variable. This is due mainly to the gravitational and visco-elastic feedback effects of the changing surface mass loads. In order to redress this apparent misconception and raise further awareness, we provide a conceptual example based on a simulated total melt of the Greenland and Antarctic ice sheets. This would give a global average sea-level change of about 64 m. However, due to the changed distribution of gravitating masses, the sea-level change depends on location, with a range of about -27 m to +79 m (i.e., sea-level will even fall in some places). This spatial dependency has several implications in the case of a total melt, such as >10% biases in global average sea-level change estimates based only on tide-gauge records, flooding of almost 10% of current land areas, an increase of the length of day by almost a half a second and a northward move of the centre of mass (geocentre) by about 20 m.

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