On the instantaneous salt mixing due to freshwater boundary fluxes

Knut Klingbeil; Marvin Lorenz

doi:https://doi.org/10.5194/egusphere-egu25-13808

[Back] [Session OS1.11]

EGU25-13808, updated on 15 Mar 2025

https://doi.org/10.5194/egusphere-egu25-13808

EGU General Assembly 2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Poster | Friday, 02 May, 08:30–10:15 (CEST), Display time Friday, 02 May, 08:30–12:30

Hall X4, X4.49

On the instantaneous salt mixing due to freshwater boundary fluxes

Knut Klingbeil¹ and Marvin Lorenz²

Knut Klingbeil and Marvin Lorenz

¹Leibniz Institute for Baltic Sea Research Warnemuende (IOW), Rostock, Germany (knut.klingbeil@io-warnemuende.de)
²Federal Waterways Engineering and Research Institute (BAW), Hamburg, Germany (marvin.lorenz@baw.de)

Starting from the well-known surface boundary conditions for the seawater continuum we derive the associated flux of squared salinity across the ocean surface. Based on concepts from Klingbeil and Henell (2023), we clarify the meaning of this flux by linking it to an instantaneous transformation between freshwater and seawater across virtual isohalines at the ocean surface. Finally, we demonstrate how mixing relations for estuaries need to be amended to account for this instantaneous mixing.

Klingbeil, K. and E. Henell (2023) A Rigorous Derivation of the Water Mass Transformation Framework, the Relation between Mixing and Diasurface Exchange Flow, and Links to Recent Theories in Estuarine Research. JPO. https://doi.org/10.1175/JPO-D-23-0130.1

How to cite: Klingbeil, K. and Lorenz, M.: On the instantaneous salt mixing due to freshwater boundary fluxes, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-13808, https://doi.org/10.5194/egusphere-egu25-13808, 2025.