Attributing mean circulation patterns to physical phenomena in the Gulf of Finland

• Autorzy: Westerlund A. , Tuomi L. , Alenius P. , Miettunen E. , Vankevich R.E.
• Języki publikacji: EN

Abstrakty

EN

We studied circulation patterns in the Gulf of Finland, an estuary-like sub-basin of the Baltic Sea. According to previous observations and model results, the long-term mean circulation in the gulf is cyclonic and mainly density driven, whereas short-term circulation patterns are wind driven. We used the high-resolution 3D hydrodynamic model NEMO to simulate the years 2012–2014. Our aim was to investigate the role of some key features, like river runoff and occasional events, in the formation of the circulation patterns. Our results show that many of the differences visible in the annual mean circulation patterns from one year to another are caused by a relatively small number of high current speed events. These events seem to be upwelling-related coastal jets. Although the Gulf of Finland receives large amounts of fresh water in river runoffs, the inter-annual variations in runoff did not explain the variations in the mean circulation patterns.

Słowa kluczowe

EN

circulation; Finland Gulf; Baltic Sea; physical phenomenon; hydrodynamic model; HIRLAM model; NEMO model

• Wydawca: -
• Czasopismo: Oceanologia
• Rocznik: 2018
• Tom: 60
• Numer: 1
• Opis fizyczny: p.16-31,fig.,ref.

Twórcy

autor

Westerlund A.

• Finnish Meteorological Institute, Erik Palmenin aukio 1, P.O.Box 503, FI-00101 Helsinki, Finland

autor

Tuomi L.

• Finnish Meteorological Institute, Marine Research, Helsinki, Finland

autor

Alenius P.

• Finnish Meteorological Institute, Marine Research, Helsinki, Finland

autor

Miettunen E.

• Finnish Environment Institute/Marine Research Centre, Helsinki, Finland

autor

Vankevich R.E.

• Russian State Hydrometeorological University, Saint Petersburg, Russia

Identyfikatory

DOI

10.1016/j.oceano.2017.05.003