Articles | Volume 18, issue 14
Biogeosciences, 18, 4389–4429, 2021
https://doi.org/10.5194/bg-18-4389-2021
Biogeosciences, 18, 4389–4429, 2021
https://doi.org/10.5194/bg-18-4389-2021

Research article 28 Jul 2021

Research article | 28 Jul 2021

Incorporating the stable carbon isotope 13C in the ocean biogeochemical component of the Max Planck Institute Earth System Model

Bo Liu et al.

Data sets

Quality controlled ocean temperature and salinity profiles and monthly objective analyses with uncertainty estimates (https://www.metoffice.gov.uk/hadobs/en4/) Simon A. Good, Matthew J. Martin, and Nick A. Rayner https://doi.org/10.1002/2013JC009067

World Ocean Atlas 2013, Volume 4: Dissolved Inorganic Nutrients (phosphate, nitrate, silicate) H. E. Garcia, R. A. Locarnini, T. P. Boyer, J. I. Antonov, O. K. Baranova, M. M. Zweng, J. R. Reagan, and D. R. Johnson https://www.nodc.noaa.gov/OC5/woa13/pubwoa13.html

World Ocean Atlas 2013, Volume 3: Dissolved Oxygen, Apparent Oxygen Utilization, and Oxygen Saturation H. E. Garcia, R. A. Locarnini, T. P. Boyer, J. I. Antonov, O. K. Baranova, M. M. Zweng, J. R. Reagan, and D. R. Johnson https://www.nodc.noaa.gov/OC5/woa13/pubwoa13.html

A global ocean carbon climatology: Results from Global Data Analysis Project (GLODAP) (https://www.ncei.noaa.gov/access/ocean-carbon-data-system/oceans/glodap/) R. M. Key, A. Kozyr, C. L. Sabine, K. Lee, R. Wanninkhof, J. L. Bullister, R. A. Feely, F. J. Millero, C. Mordy, and T.-H. Peng https://doi.org/10.1029/2004GB002247

A 30 years observation-based global monthly gridded sea surface pCO2 product from 1982 through 2011 P. Landsch{\"u}tzer, N. Gruber, N., and D. Bakker https://www.ncei.noaa.gov/access/ocean-carbon-data-system/oceans/SPCO2_1982_2011_ETH_SOM_FFN.html

Carbon-based primary productivity modeling with vertically resolved photoacclimation (http://sites.science.oregonstate.edu/ocean.productivity/) T. Westberry, M. J. Behrenfeld, D. A. Siegel, and E. Boss https://doi.org/10.1029/2007GB003078

Biology and air–sea gas exchange controls on the distribution of carbon isotope ratios (δ13C) in the ocean (https://andreasschmittner.github.io/publications.html) A. Schmittner, N. Gruber, A. C. Mix, R. M. Key, A. Tagliabue, and T. K. Westberry https://doi.org/10.5194/bg-10-5793-2013

Climatological distributions of δ13C of dissolved inorganic carbon in the global oceans. Marie Eide, Are Olsen, Ulysses S. Ninnemann, Tor Eldevik, and Truls Johannessen https://doi.org/10.1594/PANGAEA.872004

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Short summary
We incorporate a new representation of the stable carbon isotope 13C in a global ocean biogeochemistry model. The model well reproduces the present-day 13C observations. We find a recent observation-based estimate of the oceanic 13C Suess effect (the decrease in 13C/12C ratio due to uptake of anthropogenic CO2; 13CSE) possibly underestimates 13CSE by 0.1–0.26 per mil. The new model will aid in better understanding the past ocean state via comparison to 13C/12C measurements from sediment cores.
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