Modelling marine DOC degradation time scales

Polimene, L; Rivkin, RB; Luo, Y-W; Kwon, EY; Gehlen, M; Peña, MA; Wang, N; Liang, Y; Kaartokallio, H; Jiao, N. 2018 Modelling marine DOC degradation time scales. National Science Review. https://doi.org/10.1093/nsr/nwy066

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Official URL: https://academic.oup.com/nsr/advance-article/doi/1...

Abstract/Summary

Marine dissolved organic carbon (DOC) is formed of a large number of highly diverse molecules. Depending on the environmental conditions, a fraction of these molecules may become progressively resistant to bacterial degradation and accumulate in the ocean for extended time scales. This long-lived DOC (the so-called recalcitrant DOC, RDOC) is thought to play an important role in the global carbon cycle by sequestering carbon into the ocean interior and potentially affecting the climate. Despite this, RDOC formation is underrepresented in climate models. Here we propose a model formulation descripting DOC recalcitrance through two state variables: one representing the bulk DOC concentration and the other representing its degradability (k) which varies depending on the balance between the production of “new” DOC (assumed to be easily degradable) and bacterial DOC utilization assumed to leave behind more recalcitrant DOC. We propose this formulation as a means to include RDOC dynamics into climate model simulations.

Item Type: Publication - Article
Additional Information. Not used in RCUK Gateway to Research.: This is a pre-copyedited, author-produced version of an article accepted for publication in National Science Review following peer review. The version of record is available online at: doi.org/10.1093/nsr/nwy066.
Additional Keywords: Recalcitrant Dissolved Organic Matter, Microbial Carbon Pump, numerical models, ocean carbon sequestration
Subjects: Marine Sciences
Divisions: Plymouth Marine Laboratory > National Capability categories > Modelling
Depositing User: Luca Polimene
Date made live: 18 Jun 2018 13:54
Last Modified: 19 Jun 2019 01:58
URI: http://plymsea.ac.uk/id/eprint/7933

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