Articles | Volume 20, issue 9
https://doi.org/10.5194/nhess-20-2535-2020
© 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-20-2535-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
25 Sep 2020
Research article |
| 25 Sep 2020
| 25 Sep 2020
Meteotsunami occurrence in the Gulf of Finland over the past century
Finnish Meteorological Institute, P.O. Box 503, 00101 Helsinki, Finland
Terhi K. Laurila
Finnish Meteorological Institute, P.O. Box 503, 00101 Helsinki, Finland
Hanna Boman
Finnish Meteorological Institute, P.O. Box 503, 00101 Helsinki, Finland
Anu Karjalainen
Finnish Meteorological Institute, P.O. Box 503, 00101 Helsinki, Finland
Jan-Victor Björkqvist
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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Cited articles
Bechle, A. J., Kristovich, D. A., and Wu, C. H.: Meteotsunami occurrences and
causes in Lake Michigan, J. Geophys. Res.-Oceans, 120,
8422–8438, 2015. a
Cropper, T. E., Hanna, E., Valente, M. A., and Jónsson, T.: A Daily
Azores–Iceland North Atlantic Oscillation Index back to 1850,
https://doi.org/10.5281/zenodo.9979, 2014. a
Dee, D. P., Uppala, S. M., Simmons, A. J., Berrisford, P., Poli, P., Kobayashi, S., Andrae, U., Balmaseda, M. A., Balsamo, G., Bauer, P., Bechtold, P., Beljaars, A. C. M., van de Berg, L., Bidlot, J., Bormann, N., Delsol, C., Dragani, R., Fuentes, M., Geer, A. J., Haimberger, L., Healy, S. B., Hersbach, H., Hólm, E. V., Isaksen, L., Kållberg, P., Köhler, M., Matricardi, M., McNally, A. P., Monge‐Sanz, B. M., Morcrette, J.-J., Park, B.-K., Peubey, C., de Rosnay, P., Tavolato, C., Thépaut, J.-N., and Vitart, F.: The ERA-Interim reanalysis: Configuration and performance of the data assimilation system, Q. J. Roy. Meteor. Soc., 137, 553–597, 2011. a
Dusek, G., DiVeglio, C., Licate, L., Heilman, L., Kirk, K., Paternostro, C.,
and Miller, A.: A meteotsunami climatology along the US East Coast, B.
Am. Meteorol. Soc., 100, 1329–1345, 2019. a
Jönsson, B., Döös, K., Nycander, J., and Lundberg, P.: Standing
waves in the Gulf of Finland and their relationship to the basin-wide Baltic
seiches, J. Geophys. Res.-Oceans, 113, C03004, https://doi.org/10.1029/2006JC003862, 2008. a
Leonard, M.: Analysis of tide gauge records from the December 2004 Indian Ocean
tsunami, Geophys. Res. Lett., 33, L17602, https://doi.org/10.1029/2006GL026552, 2006. a
Mäkelä, A., Enno, S.-E., and Haapalainen, J.: Nordic Lightning
Information System: Thunderstorm climate of Northern Europe for the period
2002–2011, Atmos. Res., 139, 46–61, 2014. a
Masina, M., Archetti, R., Besio, G., and Lamberti, A.: Tsunami taxonomy and
detection from recent Mediterranean tide gauge data, Coast. Eng.,
127, 145–169, 2017. a
Meissner, O.: Zur Frage nach der Entstehung der Seebären, Annalen der
Hydrographie und Maritimen Meteorologie, 52, 14–15, 1924. a
Pattiaratchi, C. and Wijeratne, E.: Observations of meteorological tsunamis
along the south-west Australian coast, Nat. Hazards, 74, 281–303, 2014. a
Pattiaratchi, C. B. and Wijeratne, E.: Are meteotsunamis an underrated hazard?,
Philos. T. R. Soc. A, 373, 20140377, 2015. a
Poli, P., Hersbach, H., Tan, D. G. H., Dee, D., Thepaut, J.-J., Simmons, A.,
Peubey, C., Laloyaux, P., Komori, T., Berrisford, P., Dragani, R.,
Trémolet, Y., Hólm, E. V., Bonavita, M., Isaksen, L., and Fisher, M.:
The data assimilation system and initial performance evaluation of the ECMWF
pilot reanalysis of the 20th-century assimilating surface observations only
(ERA-20C), Shinfield Park, Reading, 2013. a
Punkka, A.-J. and Bister, M.: Mesoscale convective systems and their
synoptic-scale environment in Finland, Weather Forecast., 30, 182–196,
2015. a
Šepić, J., Vilibić, I., Lafon, A., Macheboeuf, L., and
Ivanović, Z.: High-frequency sea level oscillations in the Mediterranean
and their connection to synoptic patterns, Prog. Oceanogr., 137,
284–298, 2015. a
Stenij, S. E.: Ein selbstschreibender Apparat für Ausmessung von
Mareographenkurven, Societas Scientiarum Fennica: Commentationes
physico-mathematicae, VI, 1932. a
Vilibić, I. and Šepić, J.: Destructive meteotsunamis along the
eastern Adriatic coast: Overview, Phys. Chem. Earth, 34,
904–917, 2009. a
Vilibić, I. and Šepić, J.: Global mapping of nonseismic sea level
oscillations at tsunami timescales, Sci. Rep., 7, 40818, https://doi.org/10.1038/srep40818, 2017. a
Vilibić, I., Monserrat, S., and Rabinovich, A. B.: Meteorological tsunamis
on the US East Coast and in other regions of the World Ocean, Nat. Hazards, 74, 1–9, 2014. a
Short summary
Meteotsunamis are long waves created by atmospheric disturbances travelling over the sea. These waves can be hazardous in rare cases. Their occurrence in the Baltic Sea has been poorly known, which is why we examine century-long sea level records from the Gulf of Finland to identify these waves. In total, 121 potential meteotsunamis were found. The strong connection between meteotsunami occurrence and lightning observations indicates that meteotsunamis in this region occur during thunderstorms.
Meteotsunamis are long waves created by atmospheric disturbances travelling over the sea. These...
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