Articles | Volume 21, issue 5
https://doi.org/10.5194/os-21-2125-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/os-21-2125-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
30 Sep 2025
Research article |
| 30 Sep 2025
| 30 Sep 2025
Currents and their drivers in the Archipelago Sea: insights from ADCP measurements
Finnish Meteorological Institute, P.O. Box 503, 00101 Helsinki, Finland
Laura Tuomi
Finnish Meteorological Institute, P.O. Box 503, 00101 Helsinki, Finland
Pekka Alenius
Finnish Meteorological Institute, P.O. Box 503, 00101 Helsinki, Finland
Elina Miettunen
Finnish Environment Institute, Latokartanonkaari 11, 00790 Helsinki, Finland
Milla Johansson
Finnish Meteorological Institute, P.O. Box 503, 00101 Helsinki, Finland
Tuomo Roine
Finnish Meteorological Institute, P.O. Box 503, 00101 Helsinki, Finland
Antti Westerlund
Finnish Meteorological Institute, P.O. Box 503, 00101 Helsinki, Finland
Kimmo K. Kahma
Finnish Meteorological Institute, P.O. Box 503, 00101 Helsinki, Finland
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Ralf Weisse, Inga Dailidienė, Birgit Hünicke, Kimmo Kahma, Kristine Madsen, Anders Omstedt, Kevin Parnell, Tilo Schöne, Tarmo Soomere, Wenyan Zhang, and Eduardo Zorita
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The study is part of the thematic Baltic Earth Assessment Reports – a series of review papers summarizing the knowledge around major Baltic Earth science topics. It concentrates on sea level dynamics and coastal erosion (its variability and change). Many of the driving processes are relevant in the Baltic Sea. Contributions vary over short distances and across timescales. Progress and research gaps are described in both understanding details in the region and in extending general concepts.
Jan-Victor Björkqvist, Sander Rikka, Victor Alari, Aarne Männik, Laura Tuomi, and Heidi Pettersson
Nat. Hazards Earth Syst. Sci., 20, 3593–3609, https://doi.org/10.5194/nhess-20-3593-2020, https://doi.org/10.5194/nhess-20-3593-2020, 2020
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Wave observations have a fundamental uncertainty due to the randomness of the sea state. Such scatter is absent in model data, and we tried two methods to best account for this difference when combining measured and modelled wave heights. The results were used to estimate how rare a 2019 storm in the Bothnian Sea was. Both methods were found to have strengths and weaknesses, but our best estimate was that, in the current climate, such a storm might on average repeat about once a century.
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Short summary
The Archipelago Sea (AS), part of the Baltic Sea off the northwest coast of Finland, is a fragmented area with intense human activity. This study presents an overview of the observed currents and their main drivers in the area. While local winds primarily drive the AS currents, simultaneous sea level variations in the Bay of Bothnia and Gulf of Finland also significantly impact the area's dynamics.
The Archipelago Sea (AS), part of the Baltic Sea off the northwest coast of Finland, is a...
