Fast and slow components of interstadial warming in the North Atlantic during the last glacial
| Type | Article | ||||||||||||||||||||||||
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| 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 |
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| 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 | 7 | ||||||||||||||||||||||||
| Abstract | 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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