Articles | Volume 20, issue 12
https://doi.org/10.5194/nhess-20-3593-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/nhess-20-3593-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
23 Dec 2020
Research article |
| 23 Dec 2020
| 23 Dec 2020
Wave height return periods from combined measurement–model data: a Baltic Sea case study
Jan-Victor Björkqvist
CORRESPONDING AUTHOR
Finnish Meteorological Institute, P.O. Box 503, 00101 Helsinki, Finland
Sander Rikka
Department of Marine Systems, Tallinn University of Technology, Akadeemia tee 15a, 12611, Tallinn, Estonia
Victor Alari
Department of Marine Systems, Tallinn University of Technology, Akadeemia tee 15a, 12611, Tallinn, Estonia
Aarne Männik
Department of Marine Systems, Tallinn University of Technology, Akadeemia tee 15a, 12611, Tallinn, Estonia
Laura Tuomi
Finnish Meteorological Institute, P.O. Box 503, 00101 Helsinki, Finland
Heidi Pettersson
Finnish Meteorological Institute, P.O. Box 503, 00101 Helsinki, Finland
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Havu Pellikka, Terhi K. Laurila, Hanna Boman, Anu Karjalainen, Jan-Victor Björkqvist, and Kimmo K. Kahma
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Short summary
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Short summary
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.
Wave observations have a fundamental uncertainty due to the randomness of the sea state. Such...
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