Immediate temperature response in northern Iberia to last deglacial changes in the North Atlantic

Major disruptions in the North Atlantic circulation during the last deglaciation triggered a series of climate feedbacks that influenced the course of Termination I, suggesting an almost synchronous response in the ocean-atmosphere system. We present a replicated 818O stalagmite record from Ostolo c...

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Bibliographic Details
Published in:Geology
Main Authors: Bernal-Wormull, J. L., Moreno, A., Perez-Mejias, C., Bartolome, M., Aranburu, A., Arriolabengoa, M., Iriarte, E., Cacho, I., Spoetl, C., Edwards, R. L., Cheng, H.
Format: Report
Language:English
Published: GEOLOGICAL SOC AMER, INC 2021
Subjects:
SEA-SURFACE TEMPERATURE
CLIMATE VARIABILITY
YOUNGER DRYAS
SPELEOTHEM
PALEOCLIMATE
RECORD
EVOLUTION
DEEP
Geology
North Atlantic
Online Access:http://ir.ieecas.cn/handle/361006/16879
http://ir.ieecas.cn/handle/361006/16880
https://doi.org/10.1130/G48660.1
Description
Summary:Major disruptions in the North Atlantic circulation during the last deglaciation triggered a series of climate feedbacks that influenced the course of Termination I, suggesting an almost synchronous response in the ocean-atmosphere system. We present a replicated 818O stalagmite record from Ostolo cave in the northern Iberian Peninsula with a robust chronological framework that continuously covers the last deglaciation (18.5-10.5 kyr B.P.). The Ostolo 818O record, unlike other speleothem records in the region that were related to humidity changes, closely tracks the well-known high-latitude temperature evolution, offering important insights into the structure of the last deglaciation in the Northern Hemisphere. In addition, this new record is accompanied by a clear signal of the expected cooling events associated with the deglacial disruptions in North Atlantic deep convection during Heinrich event 1.

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