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| Titel |
The impacts of physical processes on oxygen variations in the North Sea-Baltic Sea transition zone |
| VerfasserIn |
L. Jonasson, J. L. S. Hansen, Z. Wan, J. She |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1812-0784
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| Digitales Dokument |
URL |
| Erschienen |
In: Ocean Science ; 8, no. 1 ; Nr. 8, no. 1 (2012-01-24), S.37-48 |
| Datensatznummer |
250005395
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| Publikation (Nr.) |
 copernicus.org/os-8-37-2012.pdf |
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| Zusammenfassung |
| The bottom water of the North Sea–Baltic Sea transition zone suffers from
seasonal hypoxia, usually during late summer and autumn. These hypoxic
events are critical for the benthic ecosystems and the concentration of
dissolved oxygen is an important measure of the water quality. However, to
model the subsurface dissolved oxygen is a major challenge, especially in
estuaries and coastal regions. In this study a simple oxygen consumption
model is coupled to a 3-D hydrodynamical model in order to analyse oxygen
variations in the transition zone. The benthic and pelagic consumption of
oxygen is modelled as a function of water temperature and oxygen
concentration. A quantitative assessment of the model demonstrates that the
model is able to resolve both seasonal and interannual variations in
dissolved oxygen. Results from several experimental simulations highlight
the importance of physical processes in the regulation of dissolved oxygen.
Advective oxygen transport and wind induced mixing are two key processes
that control the extent of hypoxia in the transition zone. |
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