Articles | Volume 15, issue 3
Geosci. Model Dev., 15, 1017–1035, 2022
https://doi.org/10.5194/gmd-15-1017-2022
Geosci. Model Dev., 15, 1017–1035, 2022
https://doi.org/10.5194/gmd-15-1017-2022

Model evaluation paper 03 Feb 2022

Model evaluation paper | 03 Feb 2022

Sensitivity of asymmetric oxygen minimum zones to mixing intensity and stoichiometry in the tropical Pacific using a basin-scale model (OGCM-DMEC V1.4)

Kai Wang et al.

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Cited articles

Bao, Y. and Li, Y.: Simulations of dissolved oxygen concentration in CMIP5 Earth system models, Acta Oceanol. Sin., 35, 28–37, 2016. 
Beman, J. M., Vargas, S. M., Vazquez, S., Wilson, J. M., Yu, A., Cairo, A., and Perez-Coronel, E.: Biogeochemistry and hydrography shape microbial community assembly and activity in the eastern tropical North Pacific Ocean oxygen minimum zone, Environ. Microbiol., 23, 2765–2781, 2020. 
Beman, J. M., Vargas, S. M., Vazquez, S., Wilson, J. M., Yu, A., Cairo, A., and Perez-Coronel, E.: Biogeochemistry and hydrography shape microbial community assembly and activity in the eastern tropical North Pacific Ocean oxygen minimum zone, Environ. Microbiol., 23, 2765–2781, 2021. 
Bertagnolli, A. D. and Stewart, F. J.: Microbial niches in marine oxygen minimum zones, Nat. Rev. Microbiol., 16, 723–729, 2018. 
Berthet, S., Séférian, R., Bricaud, C., Chevallier, M., Voldoire, A., and Ethé, C.: Evaluation of an Online Grid – Coarsening Algorithm in a Global Eddy – Admitting Ocean Biogeochemical Model, J. Adv. Model. Earth Sy., 11, 1759–1783, 2019. 
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Short summary
We use observational data of dissolved oxygen (DO) and organic nitrogen to calibrate a basin-scale model (OGCM-DEMC V1.4) and then evaluate model capacity for simulating mid-depth DO in the tropical Pacific. Sensitivity studies show that enhanced vertical mixing combined with reduced biological consumption performs well in reproducing asymmetric oxygen minimum zones (OMZs). We find that DO is more sensitive to biological processes in the upper OMZs but to physical processes in the lower OMZs.