Articles | Volume 15, issue 2
Clim. Past, 15, 539–554, 2019
https://doi.org/10.5194/cp-15-539-2019
Clim. Past, 15, 539–554, 2019
https://doi.org/10.5194/cp-15-539-2019

Research article 27 Mar 2019

Research article | 27 Mar 2019

Insensitivity of alkenone carbon isotopes to atmospheric CO2 at low to moderate CO2 levels

Marcus P. S. Badger et al.

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Short summary
Understanding how atmospheric CO2 has affected the climate of the past is an important way of furthering our understanding of how CO2 may affect our climate in the future. There are several ways of determining CO2 in the past; in this paper, we ground-truth one method (based on preserved organic matter from alga) against the record of CO2 preserved as bubbles in ice cores over a glacial–interglacial cycle. We find that there is a discrepancy between the two.