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The use of high-resolution bathymetry for circulation modelling in the Gulf of Finland
Finnish Environment Institute.
Stockholms universitet, Stockholm Resilience Centre, Baltic Nest Institute.
Institute of Cybernetics.
Institute of Cybernetics.
Vise andre og tillknytning
2010 (engelsk)Inngår i: Estonian Journal of Engineering, Vol. 16, nr 3, s. 187-210Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We present preliminary results of the extension of the OAAS circulation model to a high-resolution bathymetry with a finest resolution of 0.25 nautical miles in the Gulf of Finland, the Baltic Sea. The models with a resolution of 1 mile or finer are capable of resolving typical mesoscale eddies in this basin where the internal Rossby radius is usually 2–4 km. An increase in the model resolution from 1 to 0.5 NM leads to a clear improvement of the representation of the key hydrophysical fields. A further increase in the resolution to 0.25 NM has a lesser impact on hydro­physical fields, but may lead to some changes in the instantaneous patterns of currents. The para­meterization of the spreading effect of sub-grid-scale turbulence on the trajectories of initially closely located drifters is realized by means of accounting for the largely rotational character of the dynamics in this basin. The modelled average spreading rate for initially closely located particles for 1991 was 2 mm/s.

sted, utgiver, år, opplag, sider
Online, 2010. Vol. 16, nr 3, s. 187-210
Identifikatorer
URN: urn:nbn:se:su:diva-53553DOI: 10.3176/eng.2010.3.01OAI: oai:DiVA.org:su-53553DiVA, id: diva2:390911
Tilgjengelig fra: 2011-01-24 Laget: 2011-01-24

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