Southern Ocean biological impacts on global ocean oxygen

Keller, David P., Kriest, Iris, Koeve, Wolfgang and Oschlies, Andreas (2016) Southern Ocean biological impacts on global ocean oxygen Geophysical Research Letters, 43 (12). pp. 6469-6477. DOI 10.1002/2016GL069630.

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Abstract

Southern Ocean (SO) physical and biological processes are known to have a large impact on global biogeochemistry. However, the role that SO biology plays in determining ocean oxygen concentrations is not completely understood. These dynamics are investigated here by shutting off SO biology in two marine biogeochemical models. The results suggest that SO biological processes reduce the ocean's oxygen content, mainly in the deep ocean, by 14 to 19%. However, since these processes also trap nutrients that would otherwise be transported northward to fuel productivity and subsequent organic matter export, consumption, and the accompanying oxygen consumption in midlatitude to low-latitude waters, SO biology helps to maintain higher oxygen concentrations in these subsurface waters. Thereby, SO biology can influence the size of the tropical oxygen minimum zones. As a result of ocean circulation the link between SO biological processes and remote oxygen changes operates on decadal to centennial time scales.

Document Type: Article
Keywords: ocean oxygen; Southern Ocean; oxygen minimum zones; marine biogeochemical modeling
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-BM Biogeochemical Modeling
OceanRep > SFB 754
OceanRep > SFB 754 > B1
Kiel University
Refereed: Yes
DOI etc.: 10.1002/2016GL069630
ISSN: 0094-8276
Related URLs:
Projects: BIOACID, SFB754
Date Deposited: 30 Jun 2016 11:37
Last Modified: 11 Jan 2017 12:02
URI: http://oceanrep.geomar.de/id/eprint/33285

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