Seasonal variability in the inorganic ocean carbon cycle in the Northwest Pacific evaluated using a biogeochemical and carbon model coupled with an operational ocean model

Miho Ishizu (), Yasumasa Miyazawa, Tomohiko Tsunoda and Xinyu Guo
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Miho Ishizu: Japan Agency for Marine-Earth Science and Technology
Yasumasa Miyazawa: Japan Agency for Marine-Earth Science and Technology
Tomohiko Tsunoda: The Ocean Policy Research Institute of the Sasakawa Peace Foundation
Xinyu Guo: Japan Agency for Marine-Earth Science and Technology

Climatic Change, 2020, vol. 162, issue 2, No 41, 877-902

Abstract: Abstract Here, we investigate the seasonal variability in the dissolved inorganic carbon (DIC) cycle in the Northwest Pacific using a high-resolution biogeochemical and carbon model coupled with an operational ocean model. Results show that the contribution to DIC from air–sea CO2 exchange is generally offset by vertical mixing at the surface at all latitudes, with some seasonal variation. Biological processes in subarctic regions are evident at the surface, whereas in the subtropical region these processes take place within the euphotic layer and then DIC consumption deepens southward with latitude. Such latitudinal differences in biological processes lead to marked horizontal and vertical contrasts in the distribution of DIC, with modulation by horizontal and vertical advection–diffusion processes.

Keywords: Biogeochemical model; Inorganic carbon cycle; NPZDC; Northwest Pacific; Ocean acidification; JCOPE; pH; Aragonite saturation (search for similar items in EconPapers)
Date: 2020
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DOI: 10.1007/s10584-020-02779-2

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