The Greenland and Antarctic ice sheets under 1.5◦C global warming

Even if anthropogenic warming were constrained to less than 2°C above pre-industrial, the Greenland and Antarctic ice sheets will continue to lose mass this century, with rates similar to those observed over the last decade. However, nonlinear responses cannot be excluded, which may lead to larger r...

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Bibliographic Details
Published in:Nature Climate Change
Main Authors: Pattyn, F, Ritz, C, Hanna, Edward, Asay-Davis, X, DeConto, R, Durand, G, Favier, L, Fettweis, X, Goelzer, H, Golledge, N R, Munneke, P K, Lenaerts, J T M, Nowicki, S, Payne, A J, Robinson, A, Seroussi, H, Trusel, L D, van den Broeke, M
Format: Article in Journal/Newspaper
Language:English
Published: Nature Research 2018
Subjects:
F860 Climatology
Antarctic
Greenland
Antarc*
Antarctica
Ice Shelf
Online Access:https://eprints.lincoln.ac.uk/id/eprint/33260/
https://eprints.lincoln.ac.uk/id/eprint/33260/1/ReviewOnePointFive_v6.pdf
https://doi.org/10.1038/s41558-018-0305-8
Description
Summary:Even if anthropogenic warming were constrained to less than 2°C above pre-industrial, the Greenland and Antarctic ice sheets will continue to lose mass this century, with rates similar to those observed over the last decade. However, nonlinear responses cannot be excluded, which may lead to larger rates of mass loss. Furthermore, large uncertainties in future projections still remain, pertaining to knowledge gaps in atmospheric (Greenland) and oceanic (Antarctica) forcing. On millennial timescales, both ice sheets have tipping points at or slightly above the 1.5-2.0°C threshold; for Greenland, this may lead to irreversible mass loss due to the surface mass balance elevation feedback, while for Antarctica, this could result in a collapse of major drainage basins due to ice-shelf weakening.

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