Effects of phytoplankton physiology on global ocean biogeochemistry and climate
Chien, C.-T.; Pahlow, M.; Schartau, M.; Li, N.; Oschlies, A. (2023). Effects of phytoplankton physiology on global ocean biogeochemistry and climate. Science Advances 9(30): eadg1725 . https://dx.doi.org/10.1126/sciadv.adg1725
In: Science Advances. AAAS: New York. ISSN 2375-2548; e-ISSN 2375-2548, more
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| Authors | | Top |
- Chien, C.-T.
- Pahlow, M.
- Schartau, M.
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| Abstract |
The similarity of the average ratios of nitrogen (N) and phosphorus (P) in marine dissolved inorganic and particulate organic matter, dN:P and pN:P, respectively, indicates tight links between those pools in the world ocean. Here, we analyze this linkage by varying phytoplankton N and P subsistence quotas in an optimality-based ecosystem model coupled to an Earth system model. The analysis of our ensemble of simulations discloses various feedbacks between changes in the N and P quotas, N2 fixation, and denitrification that weaken the often-hypothesized tight coupling between dN:P and pN:P. We demonstrate the importance of particulate N:C and P:C ratios for regulating dN:P on the global scale, with marine oxygen level being an important control. Our analysis provides further insight into the potential interdependence of phytoplankton physiology and global climate conditions. |
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