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Two contributors to the glacial CO2 decline

Broecker, Wallace S; Yu, Jimin; Putnam, Aaron E


It is generally accepted that the glacial drawdown of atmospheric CO2 content is the sole result of uptake by the ocean. Here we make a case that the reduction of planetary CO2 outgassing made a significant contribution. We propose that the ocean contribution to CO2 reduction closely followed Northern Hemisphere summer insolation and was superimposed on a ramp-like decline resulting from a reduction in the input of planetary CO2. We base this scenario on new records of δ13C and B to Ca ratio in...[Show more]

CollectionsANU Research Publications
Date published: 2015
Type: Journal article
Source: Earth and Planetary Science Letters
DOI: 10.1016/j.epsl.2015.07.019


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