Flow, waves and water exchange in the Suur Strait, Gulf of Riga, in 2008:
Wind, flow and wave measurements were performed in November-December in 2008 in the relatively narrowand shallow Suur Strait connecting the waters of the Väinameri and the Gulf of Riga.During the measurement period wind conditions were extremely variable, including a severe storm on 23 November. The...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2011-03-01
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| Series: | Oceanologia |
| Subjects: | |
| Online Access: | http://www.iopan.gda.pl/oceanologia/53_1.html#A2 |
| _version_ | 1818492126655152128 |
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| author | Tarmo Kõuts Juss Pavelson Victor Alari Getli Haran Jaan Laanemets Urmas Raudsepp |
| author_facet | Tarmo Kõuts Juss Pavelson Victor Alari Getli Haran Jaan Laanemets Urmas Raudsepp |
| author_sort | Tarmo Kõuts |
| collection | DOAJ |
| description | Wind, flow and wave measurements were performed in November-December in 2008 in the relatively narrowand shallow Suur Strait connecting the waters of the Väinameri and the Gulf of Riga.During the measurement period wind conditions were extremely variable, including a severe storm on 23 November. The flow speedalong the strait varied between ±0.2 m s<sup>-1</sup>, except for the 0.4 m s<sup>-1</sup> that occurred after the storm as a result of the sealevel gradient. The mean and maximum significant wave heights were 0.53 m and 1.6 m respectively. Because of their longer fetch, southerlywinds generated higher waves in the strait than winds from the north. All wave events caused by the stronger southerly windsinduced sediment resuspension, whereas the current-induced shear velocity slightly exceeded the critical value for resuspensiononly when the current speed was 0.4 m s<sup>-1</sup>. A triple-nested two-dimensional high resolution (100 m in the Suur Strait) circulation model and the SWANwave model were used to simulate water exchange in 2008 and the wave-induced shear velocity field in the Suur Strait respectively. Circulation model simulations demonstrated that water exchange was highly variable, that cumulative transport followed an evident seasonal cycle, and that there was an grossannual outflow of 23 km<sup>3</sup> from the Gulf of Riga. The horizontal distribution of wave-induced shear velocityduring the strong southerly wind event indicated large shear velocities and substantial horizontal variability. The shearvelocities were less than the critical value for resuspension in the deep area of the Suur Strait. |
| first_indexed | 2024-12-10T17:39:11Z |
| format | Article |
| id | doaj.art-2ed7f3923c2445de880a4015294ee3a2 |
| institution | Directory Open Access Journal |
| issn | 0078-3234 |
| language | English |
| last_indexed | 2024-12-10T17:39:11Z |
| publishDate | 2011-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Oceanologia |
| spelling | doaj.art-2ed7f3923c2445de880a4015294ee3a22022-12-22T01:39:26ZengElsevierOceanologia0078-32342011-03-015313556Flow, waves and water exchange in the Suur Strait, Gulf of Riga, in 2008:Tarmo KõutsJuss PavelsonVictor AlariGetli HaranJaan LaanemetsUrmas RaudseppWind, flow and wave measurements were performed in November-December in 2008 in the relatively narrowand shallow Suur Strait connecting the waters of the Väinameri and the Gulf of Riga.During the measurement period wind conditions were extremely variable, including a severe storm on 23 November. The flow speedalong the strait varied between ±0.2 m s<sup>-1</sup>, except for the 0.4 m s<sup>-1</sup> that occurred after the storm as a result of the sealevel gradient. The mean and maximum significant wave heights were 0.53 m and 1.6 m respectively. Because of their longer fetch, southerlywinds generated higher waves in the strait than winds from the north. All wave events caused by the stronger southerly windsinduced sediment resuspension, whereas the current-induced shear velocity slightly exceeded the critical value for resuspensiononly when the current speed was 0.4 m s<sup>-1</sup>. A triple-nested two-dimensional high resolution (100 m in the Suur Strait) circulation model and the SWANwave model were used to simulate water exchange in 2008 and the wave-induced shear velocity field in the Suur Strait respectively. Circulation model simulations demonstrated that water exchange was highly variable, that cumulative transport followed an evident seasonal cycle, and that there was an grossannual outflow of 23 km<sup>3</sup> from the Gulf of Riga. The horizontal distribution of wave-induced shear velocityduring the strong southerly wind event indicated large shear velocities and substantial horizontal variability. The shearvelocities were less than the critical value for resuspension in the deep area of the Suur Strait.http://www.iopan.gda.pl/oceanologia/53_1.html#A2FlowWater exchangeWavesModellingShear velocityStraitBaltic Sea |
| spellingShingle | Tarmo Kõuts Juss Pavelson Victor Alari Getli Haran Jaan Laanemets Urmas Raudsepp Flow, waves and water exchange in the Suur Strait, Gulf of Riga, in 2008: Oceanologia Flow Water exchange Waves Modelling Shear velocity Strait Baltic Sea |
| title | Flow, waves and water exchange in the Suur Strait, Gulf of Riga, in 2008: |
| title_full | Flow, waves and water exchange in the Suur Strait, Gulf of Riga, in 2008: |
| title_fullStr | Flow, waves and water exchange in the Suur Strait, Gulf of Riga, in 2008: |
| title_full_unstemmed | Flow, waves and water exchange in the Suur Strait, Gulf of Riga, in 2008: |
| title_short | Flow, waves and water exchange in the Suur Strait, Gulf of Riga, in 2008: |
| title_sort | flow waves and water exchange in the suur strait gulf of riga in 2008 |
| topic | Flow Water exchange Waves Modelling Shear velocity Strait Baltic Sea |
| url | http://www.iopan.gda.pl/oceanologia/53_1.html#A2 |
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