Climate of the Past
Climate of the Past
CP
Articles | Volume 20, issue 5
Articles | Volume 20, issue 5
https://doi.org/10.5194/cp-20-1161-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-20-1161-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 20, issue 5
Research article
 | 
15 May 2024
Research article |  | 15 May 2024

Mechanisms of global ocean ventilation age change during the last deglaciation

Lingwei Li, Zhengyu Liu, Jinbo Du, Lingfeng Wan, and Jiuyou Lu

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Radiocarbon proxies suggest that the deep waters are poorly ventilated during the Last Glacial Maximum (LGM). Here we use two transient simulations with tracers of radiocarbon and ideal age to show that the deep-ocean ventilation age is not much older at the LGM compared to the present day because of the strong glacial Antarctic Bottom Water transport. In contrast, the ventilation age is older during deglaciation mainly due to weakening of Antarctic Bottom Water transport.
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