University of Cambridge > Talks.cam > Department of Earth Sciences Seminars (downtown) > Reconstructing CO2 change on 100 to 100 million year timescales

Reconstructing CO2 change on 100 to 100 million year timescales

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CO2 change amplified the ice ages of the Quaternary, drove global cooling through the Cenozoic, and may have contributed to mass extinctions. However our records of how – and why – CO2 changed through Earth’s history are still relatively uncertain and incomplete. In this seminar I present recent progress in CO2 reconstruction using boron isotopes. The appeal of this method lies in its grounding in simple acid-base equilibria, but there are a range of interesting challenges in its application to the geological record. Here I will outline our current understanding of the boron isotope proxy and show examples of its application to the ice ages, Cenozoic cooling, climate sensitivity, and changes in ocean chemistry associated with mass extinctions.

This talk is part of the Department of Earth Sciences Seminars (downtown) series.

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