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A model study of suspended sand due to surface waves during a storm in the Baltic Proper
Linköping University, The Tema Institute, Department of Water and Environmental Studies. Linköping University, Faculty of Arts and Sciences.
2006 (English)In: Journal of Marine Systems, ISSN 0924-7963, Vol. 63, no 3-4, 91-104 p.Article in journal (Refereed) Published
Abstract [en]

During 28 November–5 December 1999 three storms passed the Baltic Sea area. The modelled surface waves in the Baltic Proper during this period have been used to calculate the amount of suspended sand in the water mass. Different parameterisations depending on the flow regimes (rippled bed flow or sheet flow) have been used for the suspended sediment calculations.

The study shows that the shallow areas along the eastern and southern sides of the Baltic Proper were most exposed to the wave induced resuspension during this period. The resuspension events lasted for about 6–12 h, thereafter the sediment settled again within an hour. During each low passage, about 2.5 Mton sand were suspended, releasing about 0.5·106 m3 earlier trapped interstitial water. This might have a large effect on the nutrient concentrations in the water mass above these bottoms.

Place, publisher, year, edition, pages
2006. Vol. 63, no 3-4, 91-104 p.
Keyword [en]
Storm events; Surface waves; Resuspension; Suspended sediment; Scandinavia; Baltic Sea; Baltic Proper; 54° N–59° N 16° E–25° E
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:liu:diva-13422DOI: 10.1016/j.jmarsys.2006.05.005OAI: oai:DiVA.org:liu-13422DiVA: diva2:20697
Note

On the day of the defence date the title of this article was A model study of suspended sand due to surface waves during a winter storm in the Baltic Proper.

Available from: 2005-11-09 Created: 2005-11-09 Last updated: 2014-09-22
In thesis
1. Model Studies of Surface Waves and Sediment Resuspension in the Baltic Sea
Open this publication in new window or tab >>Model Studies of Surface Waves and Sediment Resuspension in the Baltic Sea
2005 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Wave heights and periods of surface waves in the Baltic Sea have been modelled for a two-year period (1999-2000) with the wave model Hypas on an 11x11-km grid scale. There is a clear seasonal variation with higher waves during winter and lower during summer. This is mainly a reflection of the wind climate in the area where the winters are windier than the summers. The largest waves are found in the Skagerrak and over the deeper, eastern areas in the Baltic Proper.

In the Baltic Sea, the surface waves influence the bottom sediment by initiating resuspension down to 80 m depths. This process is dependent not only on the waves but also on the varying grain size diameters. Fine and medium sand resuspend more often than other sediment types, and these sediments cover together about 25% of the Baltic Proper area. On average sediment is here resuspended 4-5 times per month with a duration for each event of 22 hours. The highest resuspension frequencies are found on the eastern and southern side of the Baltic Proper.

During resuspension sediment grains are lifted up into the water mass and matters earlier bound in the sediment can be released. This may stimulate both production and degradation of organic matter.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2005. 49 p.
Series
Linköping Studies in Arts and Science, ISSN 0282-9800 ; 332
Keyword
Surface waves, Wave model, Wave friction velocity, Resuspension, Sediment dynamics, Nitrogen fixation, Baltic Sea, Havsvågor, Östersjön, Oceanografi, Sediment
National Category
Oceanography, Hydrology, Water Resources
Identifiers
urn:nbn:se:liu:diva-4680 (URN)91-85299-94-4 (ISBN)
Public defence
2005-09-23, Elysion, Hus T, Campus Valla, Linköpings universitet, Linköping, 10:00 (English)
Opponent
Supervisors
Available from: 2005-11-09 Created: 2005-11-09 Last updated: 2014-09-22Bibliographically approved

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Jönsson, Anette

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