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| Titel |
Long-term spatial variations in the Baltic Sea wave fields |
| VerfasserIn |
T. Soomere  , A. Räämet |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1812-0784
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| Digitales Dokument |
URL |
| Erschienen |
In: Ocean Science ; 7, no. 1 ; Nr. 7, no. 1 (2011-02-18), S.141-150 |
| Datensatznummer |
250004438
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| Publikation (Nr.) |
 copernicus.org/os-7-141-2011.pdf |
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| Zusammenfassung |
| This study focuses on spatial patterns in linear trends of numerically
reconstructed basic wave properties (average and extreme wave heights, wave
periods) in the Baltic Sea under the assumption of no ice cover. Numerical
simulations of wave conditions for 1970–2007, using the WAM wave model and
adjusted geostrophic winds, revealed extensive spatial variations in
long-term changes in both average and extreme wave heights in the Baltic Sea
but almost no changes in the basinwide wave activity and wave periods. There
has been a statistically significant decrease in the annual mean significant
wave height by more than 10% between the islands of Öland and Gotland
and in the southward sea area, and a substantial increase to the south-west
of Bornholm, near the coast of Latvia, between the Åland Archipelago and
the Swedish mainland, and between the Bothnian Sea and the Bothnian Bay.
Variations in extreme wave heights (defined as the threshold for 1% of
the highest waves each year) show similar patterns of changes. In several
areas the trends in average and extreme wave heights are different. Such a
complicated pattern of changes indicates that (i) different regions of the
Baltic Sea basin have experienced widespread but essentially different
changes in wind properties and (ii) many seemingly controversial trends and
variations established in wave properties at different sites in the recent
past may reflect the natural spatial variability in the Baltic Sea wave
fields. |
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