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...
Published in: | Geology |
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Main Authors: | , , , , , , , , , , |
Format: | Report |
Language: | English |
Published: |
GEOLOGICAL SOC AMER, INC
2021
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Subjects: | |
Online Access: | http://ir.ieecas.cn/handle/361006/16878 https://doi.org/10.1130/G48660.1 |
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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