Fast and slow components of interstadial warming in the North Atlantic during the last glacial

Type Article
Date 2020-08
Language English
Author(s) Margari Vasiliki1, Skinner Luke C.2, Menviel Laurie3, Capron Emilie4, Rhodes Rachael H.2, Mleneck-Vautravers Maryline J.2, Ezat Mohamed M.2, 5, 6, Martrat Belen7, Grimalt Joan O.7, Hodell David A.2, Tzedakis Polychronis C.1
Affiliation(s) 1 : Environmental Change Research Centre, Department of Geography, University College London, London, WC1E 6BT, UK
2 : Department of Earth Sciences, University of Cambridge, Cambridge, CB2 3EQ, UK
3 : Climate Change Research Centre, PANGEA, The University of New South Wales, Sydney, NSW, 2052, Australia
4 : Physics of Ice, Climate, Earth, Niels Bohr Institute, University of Copenhagen, Tagensvej 16, DK-2200, Copenhagen, Denmark
5 : CAGE-Centre for Arctic Gas Hydrate, Environment and Climate, Department of Geosciences, UiT The Arctic University of Norway, 9037, Tromsø, Norway
6 : Department of Geology, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt
7 : Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research (IDAEA), Spanish Council for Scientific Research (CSIC), 08034, Barcelona, Spain
Source Communications Earth & Environment (2662-4435) (Springer Science and Business Media LLC), 2020-08 , Vol. 1 , N. 1 , P. 6 (9p.)
DOI 10.1038/s43247-020-0006-x
WOS© Times Cited 5

The abrupt nature of warming events recorded in Greenland ice-cores during the last glacial has generated much debate over their underlying mechanisms. Here, we present joint marine and terrestrial analyses from the Portuguese Margin, showing a succession of cold stadials and warm interstadials over the interval 35–57 ka. Heinrich stadials 4 and 5 contain considerable structure, with a short transitional phase leading to an interval of maximum cooling and aridity, followed by slowly increasing sea-surface temperatures and moisture availability. A climate model experiment reproduces the changes in western Iberia during the final part of Heinrich stadial 4 as a result of the gradual recovery of the Atlantic meridional overturning circulation. What emerges is that Greenland ice-core records do not provide a unique template for warming events, which involved the operation of both fast and slow components of the coupled atmosphere–ocean–sea-ice system, producing adjustments over a range of timescales.

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Margari Vasiliki, Skinner Luke C., Menviel Laurie, Capron Emilie, Rhodes Rachael H., Mleneck-Vautravers Maryline J., Ezat Mohamed M., Martrat Belen, Grimalt Joan O., Hodell David A., Tzedakis Polychronis C. (2020). Fast and slow components of interstadial warming in the North Atlantic during the last glacial. Communications Earth & Environment, 1(1), 6 (9p.). Publisher's official version : , Open Access version :