Articles | Volume 19, issue 6
Research article
20 Dec 2023
Research article |  | 20 Dec 2023

Observations of strong turbulence and mixing impacting water exchange between two basins in the Baltic Sea

Julia Muchowski, Martin Jakobsson, Lars Umlauf, Lars Arneborg, Bo Gustafsson, Peter Holtermann, Christoph Humborg, and Christian Stranne

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Cited articles

Ahola, M.: Climate Change in the Baltic Sea2021 Fact Sheet: Baltic Sea Environment Proceedings no. 180, HELCOM/Baltic Earth 2021, Swedish Museum of Natural History, Department of Environmental research and monitoring, ISSN: 0357-2994, 2021. 
Arneborg, L., Jansson, P., Staalstrøm, A., and Broström, G.: Tidal energy loss, internal tide radiation, and local dissipation for two-layer tidal flow over a sill, J. Phys. Oceanogr., 47, 1521–1538, 2017. 
Beckholmen, M. and Tiren, S. A.: The geological history of the Baltic Sea, A review of the literature and investigation tools, Swedish Radiation Safety Authority, ISSN: 2000-0456, 2009. 
Burchard, H., Bolding, K., Feistel, R., Gräwe, U., Klingbeil, K., MacCready, P., Mohrholz, V., Umlauf, L., and van der Lee, E. M.: The Knudsen theorem and the Total Exchange Flow analysis framework applied to the Baltic Sea, Prog. Oceanogr., 165, 268–286,, 2018. 
Short summary
We show observational data of highly increased mixing and vertical salt flux rates in a sparsely sampled region of the northern Baltic Sea. Co-located acoustic observations complement our in situ measurements and visualize turbulent mixing with high spatial resolution. The observed mixing is generally not resolved in numerical models of the area but likely impacts the exchange of water between the adjacent basins as well as nutrient and oxygen conditions in the Bothnian Sea.