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Implications of ambiguity in Antarctic ice sheet dynamics for future coastal erosion estimates: a probabilistic assessment

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  • Verschuur, Jasper
  • Le Bars, Dewi
  • Drijfhout, Sybren
  • Katsman, Caroline
  • de Vries, Sierd
  • Ranasinghe, Roshanka
  • Aarninkhof, Stefan

Abstract

Sea-level rise (SLR) can amplify the episodic erosion from storms and drive chronic erosion on sandy shorelines, threatening many coastal communities. One of the major uncertainties in SLR projections is the potential rapid disintegration of large fractions of the Antarctic ice sheet (AIS). Quantifying this uncertainty is essential to support sound risk management of coastal areas, although it is neglected in many erosion impact assessments. Here, we use the island of Sint Maarten as a case study to evaluate the impact of AIS uncertainty for future coastal recession. We estimate SLR-induced coastal recession using a probabilistic framework and compare and contrast three cases of AIS dynamics within the range of plausible futures. Results indicate that projections of coastal recession are sensitive to local morphological factors and assumptions made on how AIS dynamics are incorporated into SLR projections and that underestimating the potential rapid mass loss from the AIS can lead to ill-informed coastal adaptation decisions.

Suggested Citation

  • Verschuur, Jasper & Le Bars, Dewi & Drijfhout, Sybren & Katsman, Caroline & de Vries, Sierd & Ranasinghe, Roshanka & Aarninkhof, Stefan, 2018. "Implications of ambiguity in Antarctic ice sheet dynamics for future coastal erosion estimates: a probabilistic assessment," Earth Arxiv dysza, Center for Open Science.
    • Handle: RePEc:osf:eartha:dysza
    DOI: 10.31219/osf.io/dysza
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    1. J. L. Bamber & W. P. Aspinall, 2013. "An expert judgement assessment of future sea level rise from the ice sheets," Nature Climate Change, Nature, vol. 3(4), pages 424-427, April.
    2. Tiffany Anderson & Charles Fletcher & Matthew Barbee & L. Frazer & Bradley Romine, 2015. "Doubling of coastal erosion under rising sea level by mid-century in Hawaii," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 78(1), pages 75-103, August.
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