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An assessment of forward and inverse GIA solutions for Antarctica

Journal Article


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Abstract


  • In this work we assess the most recent estimates of glacial isostatic adjustment (GIA) for

    Antarctica, including those from both forward and inverse methods. The assessment is based on a

    comparison of the estimated uplift rates with a set of elastic-corrected GPS vertical velocities. These have

    been observed from an extensive GPS network and computed using data over the period 2009–2014. We

    find systematic underestimations of the observed uplift rates in both inverse and forward methods over

    specific regions of Antarctica characterized by low mantle viscosities and thin lithosphere, such as the

    northern Antarctic Peninsula and the Amundsen Sea Embayment, where its recent ice discharge history

    is likely to be playing a role in current GIA. Uplift estimates for regions where many GIA models have

    traditionally placed their uplift maxima, such as the margins of Filchner-Ronne and Ross ice shelves, are

    found to be overestimated. GIA estimates show large variability over the interior of East Antarc tica which

    results in increased uncertainties on the ice-sheet mass balance derived from gravimetry methods.

Authors


  •   Martín-Español, Alba (external author)
  •   King, Matt A. (external author)
  •   Zammit-Mangion, Andrew
  •   Andrews, Stuart (external author)
  •   Moore, Phillip (external author)
  •   Bamber, Jonathan (external author)

Publication Date


  • 2016

Citation


  • Martín-Español, A., King, M. A., Zammit-Mangion, A., Andrews, S. B., Moore, P. & Bamber, J. L. (2016). An assessment of forward and inverse GIA solutions for Antarctica. Journal Of Geophysical Research-solid Earth, 121 (9), 6947-6965.

Scopus Eid


  • 2-s2.0-84990032191

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=7216&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/6186

Has Global Citation Frequency


Number Of Pages


  • 18

Start Page


  • 6947

End Page


  • 6965

Volume


  • 121

Issue


  • 9

Place Of Publication


  • United States

Abstract


  • In this work we assess the most recent estimates of glacial isostatic adjustment (GIA) for

    Antarctica, including those from both forward and inverse methods. The assessment is based on a

    comparison of the estimated uplift rates with a set of elastic-corrected GPS vertical velocities. These have

    been observed from an extensive GPS network and computed using data over the period 2009–2014. We

    find systematic underestimations of the observed uplift rates in both inverse and forward methods over

    specific regions of Antarctica characterized by low mantle viscosities and thin lithosphere, such as the

    northern Antarctic Peninsula and the Amundsen Sea Embayment, where its recent ice discharge history

    is likely to be playing a role in current GIA. Uplift estimates for regions where many GIA models have

    traditionally placed their uplift maxima, such as the margins of Filchner-Ronne and Ross ice shelves, are

    found to be overestimated. GIA estimates show large variability over the interior of East Antarc tica which

    results in increased uncertainties on the ice-sheet mass balance derived from gravimetry methods.

Authors


  •   Martín-Español, Alba (external author)
  •   King, Matt A. (external author)
  •   Zammit-Mangion, Andrew
  •   Andrews, Stuart (external author)
  •   Moore, Phillip (external author)
  •   Bamber, Jonathan (external author)

Publication Date


  • 2016

Citation


  • Martín-Español, A., King, M. A., Zammit-Mangion, A., Andrews, S. B., Moore, P. & Bamber, J. L. (2016). An assessment of forward and inverse GIA solutions for Antarctica. Journal Of Geophysical Research-solid Earth, 121 (9), 6947-6965.

Scopus Eid


  • 2-s2.0-84990032191

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=7216&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/6186

Has Global Citation Frequency


Number Of Pages


  • 18

Start Page


  • 6947

End Page


  • 6965

Volume


  • 121

Issue


  • 9

Place Of Publication


  • United States