Effects of surface current/wind interaction in an eddy-rich general ocean circulation simulation of the Baltic Sea.

Dietze, Heiner and Löptien, Ulrike (2016) Effects of surface current/wind interaction in an eddy-rich general ocean circulation simulation of the Baltic Sea. Open Access Ocean Science, 12 . pp. 977-986. DOI 10.5194/os-12-977-2016.

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Abstract

Deoxygenation in the Baltic Sea endangers fish yields and favours noxious algal blooms. Yet, vertical transport processes ventilating the oxygen-deprived waters at depth and replenishing nutrient-deprived surface waters (thereby fuelling export of organic matter to depth), are not comprehensively understood. Here, we investigate the effects of the interaction between surface currents and winds (also referred to as eddy/wind effects) on upwelling in an eddy-rich general ocean circulation model of the Baltic Sea. Contrary to expectations we find that accounting for current/wind effects does inhibit the overall vertical exchange between oxygenated surface waters and oxygen-deprived water at depth. At major upwelling sites, however, as e.g. off the south coast of Sweden and Finland, the reverse holds: the interaction between topographically steered surface currents with winds blowing over the sea results in a climatological sea surface temperature cooling of 0.5 K. This implies that current/wind effects drive substantial local upwelling of cold and nutrient-replete waters.

Document Type: Article
Research affiliation: OceanRep > SFB 754 > A2
OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-BM Biogeochemical Modeling
OceanRep > SFB 754 > B9
OceanRep > SFB 754 > B1
OceanRep > SFB 754
Refereed: Yes
Open Access Journal?: Yes
DOI etc.: 10.5194/os-12-977-2016
ISSN: 1812-0784
Related URLs:
Projects: SFB754
Date Deposited: 01 Mar 2016 10:01
Last Modified: 08 Jul 2019 12:54
URI: http://oceanrep.geomar.de/id/eprint/31634

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