MIS-11 duration key to disappearance of the Greenland ice sheet.

Robinson, Alexander, Alvarez-Solas, Jorge, Calov, Reinhard, Ganopolski, Andrey and Montoya, Marisa (2017) MIS-11 duration key to disappearance of the Greenland ice sheet. Open Access Nature Communications, 8 . Art.Nr. 16008. DOI 10.1038/ncomms16008.

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Palaeo data suggest that Greenland must have been largely ice free during Marine Isotope Stage 11 (MIS-11). However, regional summer insolation anomalies were modest during this time compared to MIS-5e, when the Greenland ice sheet likely lost less volume. Thus it remains unclear how such conditions led to an almost complete disappearance of the ice sheet. Here we use transient climate–ice sheet simulations to simultaneously constrain estimates of regional temperature anomalies and Greenland’s contribution to the MIS-11 sea-level highstand. We find that Greenland contributed 6.1 m (3.9–7.0 m, 95% credible interval) to sea level, ∼7 kyr after the peak in regional summer temperature anomalies of 2.8 °C (2.1–3.4 °C). The moderate warming produced a mean rate of mass loss in sea-level equivalent of only around 0.4 m per kyr, which means the long duration of MIS-11 interglacial conditions around Greenland was a necessary condition for the ice sheet to disappear almost completely.

Document Type: Article
Refereed: Yes
Open Access Journal?: Yes
DOI etc.: 10.1038/ncomms16008
ISSN: 2041-1723
Projects: PalMod
Date Deposited: 14 Sep 2018 09:02
Last Modified: 06 Feb 2020 09:16
URI: http://oceanrep.geomar.de/id/eprint/44305

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