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- W4366448610 abstract "<strong class=journal-contentHeaderColor>Abstract.</strong> Nitrogen (N) plays a central role in marine biogeochemistry by limiting biological productivity in the surface ocean, in- ï¬uencing the cycles of other nutrients, carbon, and oxygen, and controlling oceanic emissions of nitrous oxide (N<sub>2</sub>O) to the atmosphere. Multiple chemical forms of N are linked together in a dynamic N cycle that is especially active in oxygen minimum zones (OMZs), where high organic matter remineralization and low oxygen concentrations fuel aerobic and anaerobic N transformations. Biogeochemical models used to understand the oceanic N cycle and project its change often employ simple parameterizations of the network of N transformations and omit key intermediary tracers such as nitrite (NO<sub>2</sub><sup>-</sup>) and N<sub>2</sub>O. Here we present a new model of the oceanic N cycle (<strong>Nitr</strong>ogen cycling in <strong>O</strong>xygen <strong>M</strong>inimum <strong>Z</strong>ones, or NitrOMZ) that resolves N transformation occurring within OMZs, and their sensitivity to environmental drivers. The model is designed to be easily coupled to current ocean biogeochemical models by representing the major forms of N as prognostic tracers, and parameter- izing their transformations as a function of seawater chemistry and organic matter remineralization, with minimal interference with other elemental cycles. We describe the model rationale, formulation, and numerical implementation in a one-dimensional representation of the water column that reproduces typical OMZ conditions. We further detail the optimization of uncertain model parameters against observations from the Eastern Tropical South Paciï¬c OMZ, and evaluate the model ability to reproduce observed proï¬les of N tracers and transformation rates in this region. We conclude by describing the model sensitivity to parameter choices and environmental factors, and discussing the model suitability for ocean biogeochemical studies." @default.
- W4366448610 created "2023-04-22" @default.
- W4366448610 creator A5052404448 @default.
- W4366448610 date "2023-04-19" @default.
- W4366448610 modified "2023-10-18" @default.
- W4366448610 title "Comment on gmd-2022-244: Response to reviewer comments" @default.
- W4366448610 doi "https://doi.org/10.5194/gmd-2022-244-ac1" @default.
- W4366448610 hasPublicationYear "2023" @default.
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