Articles | Volume 13, issue 8
https://doi.org/10.5194/bg-13-2511-2016
https://doi.org/10.5194/bg-13-2511-2016
Research article
 | 
28 Apr 2016
Research article |  | 28 Apr 2016

Looking beyond stratification: a model-based analysis of the biological drivers of oxygen deficiency in the North Sea

Fabian Große, Naomi Greenwood, Markus Kreus, Hermann-Josef Lenhart, Detlev Machoczek, Johannes Pätsch, Lesley Salt, and Helmuth Thomas

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We used the ECOHAM5 model to provide a consistent picture of the physical and biological drivers of oxygen deficiency in the North Sea. Regions susceptible to oxygen deficiency are characterised by low tidal mixing and moderate water depth (~ 40 m). Variations in upper layer productivity drive the year-to-year variability of bottom oxygen conditions. The model-based analysis reveals that benthic and pelagic remineralisation account for 90 % of bottom oxygen consumption observed at North Dogger.
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