Articles | Volume 18, issue 1
Research article
19 Jan 2022
Research article |  | 19 Jan 2022

Refined estimates of water transport through the Åland Sea in the Baltic Sea

Antti Westerlund, Elina Miettunen, Laura Tuomi, and Pekka Alenius

Data sets

Baltic Sea Physics Reanalysis CMEMS

ERA5 hourly data on single levels from 1979 to present H. Hersbach, B. Bell, P. Berrisford, G. Biavati, A. Horányi, J. Muñoz Sabater, J. Nicolas, C. Peubey, R. Radu, I. Rozum, D. Schepers, A. Simmons, C. Soci, D. Dee, and S. Thépaut J.-N.

Model code and software

nemo-archs A. Westerlund and E. Miettunen

NEMO ocean engine G. Madec and NEMO System Team

Short summary
Water exchange through the Åland Sea (in the Baltic Sea) affects the conditions in the neighbouring Gulf of Bothnia. Pathways and variability of flows were studied with a high-resolution hydrodynamic model. Our analysis showed a northward transport in the deep layer and net transport towards the south in the surface layer. While on the southern edge of the Åland Sea the primary route of deep-water exchange is through Lågskär Deep, some deep water still bypasses it to the Åland Sea.