Guarino, M-V;
Sime, LC;
Schröeder, D;
Malmierca-Vallet, I;
Rosenblum, E;
Ringer, M;
Ridley, J;
... Sellar, A; + view all
(2020)
Sea-ice-free Arctic during the Last Interglacial supports fast future loss.
Nature Climate Change
, 10
pp. 928-932.
10.1038/s41558-020-0865-2.
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Abstract
The Last Interglacial (LIG), a warmer period 130,000–116,000 years before present, is a potential analogue for future climate change. Stronger LIG summertime insolation at high northern latitudes drove Arctic land summer temperatures 4–5 °C higher than in the pre-industrial era. Climate model simulations have previously failed to capture these elevated temperatures, possibly because they were unable to correctly capture LIG sea-ice changes. Here, we show that the latest version of the fully coupled UK Hadley Center climate model (HadGEM3) simulates a more accurate Arctic LIG climate, including elevated temperatures. Improved model physics, including a sophisticated sea-ice melt-pond scheme, result in a complete simulated loss of Arctic sea ice in summer during the LIG, which has yet to be simulated in past generations of models. This ice-free Arctic yields a compelling solution to the long-standing puzzle of what drove LIG Arctic warmth and supports a fast retreat of future Arctic summer sea ice.
| Type: | Article |
|---|---|
| Title: | Sea-ice-free Arctic during the Last Interglacial supports fast future loss |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1038/s41558-020-0865-2 |
| Publisher version: | https://doi.org/10.1038/s41558-020-0865-2 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Atmospheric science, Climate change, Climate sciences, Cryospheric science, Ocean sciences |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Earth Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10109862 |
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