Comment on “Synchronous records of pCO2 and Δ14C suggest rapid, ocean-derived pCO2 fluctuations at the onset of Younger Dryas” by Steinthorsdottir et al

Steinthorsdottir et al. (2014) used a previously published stomata-based CO2 record (Steinthorsdottir et al., 2013) to argue for a large, abrupt change in atmospheric carbon dioxide at the onset of the Younger Dryas (YD) cold interval. Their record implies a 50 ppm CO2 rise followed by a decline by...

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Bibliographic Details
Published in:Quaternary Science Reviews
Main Authors: Köhler, Peter, Fischer, Hubertus, Schmitt, Jochen, Brook, Edward J., Marcott, Shaun A.
Format: Article in Journal/Newspaper
Language:unknown
Published: Elsevier 2015
Subjects:
EPICA
ice core
Online Access:https://epic.awi.de/id/eprint/36707/
https://epic.awi.de/id/eprint/36707/2/revision_yd_co2.pdf
http://www.sciencedirect.com/science/article/pii/S0277379114003722
https://hdl.handle.net/10013/epic.44476
https://hdl.handle.net/10013/epic.44476.d002
Description
Summary:Steinthorsdottir et al. (2014) used a previously published stomata-based CO2 record (Steinthorsdottir et al., 2013) to argue for a large, abrupt change in atmospheric carbon dioxide at the onset of the Younger Dryas (YD) cold interval. Their record implies a 50 ppm CO2 rise followed by a decline by 100 ppm. They compare their results to a hypothetical and highly unlikely simulation sce- nario in which vertical mixing in the ocean is increased by a factor of 100 and wind strength by a factor of 7. They furthermore compare their stomata-based CO2 record with the ice core CO2 re- cord derived from EPICA Dome C (EDC). We here question their interpretation.

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