The Bølling–Allerød Interstadial

The Bølling–Allerød (B-A), the terrestrial counterpart of Dansgaard–Oeschger 1, is the first abrupt northern hemisphere climate warming episode of the last deglaciation. Several hypotheses have been proposed to explain this event: all involve the strengthening of the Atlantic Meridional Overturning...

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Bibliographic Details
Main Authors: Naughton, Filipa, Sánchez-Goñi, María F., Landais, Amaelle, Rodrigues, Teresa, Vazquez Riveiros, Natalia, Toucanne, Samuel
Other Authors: Geo-Ocean (GEO-OCEAN), Université de Bretagne Sud (UBS)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)
Format: Book Part
Language:English
Published: HAL CCSD 2023
Subjects:
[SDU]Sciences of the Universe [physics]
Greenland
Online Access:https://hal.science/hal-04309710
https://doi.org/10.1016/B978-0-323-91899-2.00015-2
Description
Summary:The Bølling–Allerød (B-A), the terrestrial counterpart of Dansgaard–Oeschger 1, is the first abrupt northern hemisphere climate warming episode of the last deglaciation. Several hypotheses have been proposed to explain this event: all involve the strengthening of the Atlantic Meridional Overturning Circulation (AMOC) prior or during the Heinrich Stadial 1/B-A transition and the consequent warming of the northern hemisphere. Terrestrial proxies (mainly pollen and speleothems) reflect a progressive increase in moisture availability from the Bølling to the Allerød in Europe contrasting with Greenland isotope records which show maxima in temperature and precipitation at the onset of the Bølling and a gradual decrease to the end of the Allerød. Changes in moisture availability in Europe are triggered by coupled interactions between the AMOC and changes in atmospheric dynamics led by the westerlies.

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