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

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.

Bibliographic Details

Main Authors:	Margari, Vasiliki, Skinner, Luke C., Menviel, Laurie, Capron, Emilie, Rhodes, Rachael H., Mleneck-Vautravers, Maryline J., Ezat, Mohamed M., Grimalt, Joan O., Martrat, Belen, Hodell, David A., Tzedakis, Polychronis C.
Other Authors:	European Commission
Format:	artículo biblioteca
Language:	English
Published:	Springer Nature 2020-08-13
Subjects:	Greenland, Interstadial warming,
Online Access:	http://hdl.handle.net/10261/218505 http://dx.doi.org/10.13039/501100000780
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