Articles | Volume 17, issue 2
Clim. Past, 17, 753–774, 2021
https://doi.org/10.5194/cp-17-753-2021
Clim. Past, 17, 753–774, 2021
https://doi.org/10.5194/cp-17-753-2021

Research article 06 Apr 2021

Research article | 06 Apr 2021

Evaluating the biological pump efficiency of the Last Glacial Maximum ocean using δ13C

Anne L. Morée et al.

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Short summary
This modeling study of the Last Glacial Maximum (LGM, ~ 21 000 years ago) ocean explores the biological and physical changes in the ocean needed to satisfy marine proxy records, with a focus on the carbon isotope 13C. We estimate that the LGM ocean may have been up to twice as efficient at sequestering carbon and nutrients at depth as compared to preindustrial times. Our work shows that both circulation and biogeochemical changes must have occurred between the LGM and preindustrial times.