Illustrative Multi‐Centennial Projections of Global Mean Sea‐Level Rise and Their Application

Turner, Fiona E., Malagon Santos, Victor, Edwards, Tamsin L., Slangen, Aimée B. A., Nicholls, Robert J. ORCID: https://orcid.org/0000-0002-9715-1109, Le Cozannet, Gonéri, O’Neill, James and Adhikari, Mira (2023) Illustrative Multi‐Centennial Projections of Global Mean Sea‐Level Rise and Their Application. Earth's Future, 11 (12). ISSN 2328-4277

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Abstract

We produce projections of global mean sea-level rise to 2500 for low and medium emissions scenarios (Shared Socioeconomic Pathways SSP1-2.6 and SSP2-4.5) relative to 2020, based on extending and combining model ensemble data from current literature. We find that emissions have a large effect on sea-level rise on these long timescales, with [5, 95]% intervals of [0.3, 4.3]m and [1.0, 7.6]m under SSP1-2.6 and SSP2-4.5 respectively, and a difference in the 95% quantile of 1.6 m at 2300 and 3.3 m at 2500 for the two scenarios. The largest and most uncertain component is the Antarctic ice sheet, projected to contribute 5%–95% intervals of [−0.1, 2.3]m by 2500 under SSP1-2.6 and [0.0, 3.8]m under SSP2-4.5. We discuss how the simple statistical extensions used here could be replaced with more physically based methods for more robust predictions. We show that, despite their uncertainties, current multi-centennial projections combined into multi-study projections as presented here can be used to avoid future “lock-ins” in terms of risk and adaptation needs to sea-level rise.

Item Type: Article
UEA Research Groups: University of East Anglia Schools > Faculty of Science > Tyndall Centre for Climate Change Research
Faculty of Science > Research Centres > Tyndall Centre for Climate Change Research
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Depositing User: LivePure Connector
Date Deposited: 09 Dec 2023 01:39
Last Modified: 09 Dec 2023 01:39
URI: https://ueaeprints.uea.ac.uk/id/eprint/93928
DOI: 10.1029/2023EF003550

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