Biogeosciences
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Articles | Volume 19, issue 1
Articles | Volume 19, issue 1
https://doi.org/10.5194/bg-19-93-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-19-93-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 19, issue 1
Research article
 | 
06 Jan 2022
Research article |  | 06 Jan 2022

Derivation of seawater pCO2 from net community production identifies the South Atlantic Ocean as a CO2 source

Daniel J. Ford, Gavin H. Tilstone, Jamie D. Shutler, and Vassilis Kitidis

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Short summary
This study identifies the most accurate biological proxy for the estimation of seawater pCO2 fields, which are key to assessing the ocean carbon sink. Our analysis shows that the net community production (NCP), the balance between photosynthesis and respiration, was more accurate than chlorophyll a within a neural network scheme. The improved pCO2 estimates, based on NCP, identified the South Atlantic Ocean as a net CO2 source, compared to a CO2 sink using chlorophyll a.
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