doi:10.5697/oc.54-3.421 Currents and waves OCEANOLOGIA, 54 (3), 2012. in the northern Gulf of pp. 421–447. C Copyright by Riga: measurement and Polish Academy of Sciences, * Institute of Oceanology, long-term hindcast 2012. KEYWORDS Hydrodynamic modelling Water exchange Wave hindcast Wind climate RDCP Baltic Sea Ulo¨ Suursaar⋆ Tiit Kullas Robert Aps Estonian Marine Institute, University of Tartu, M¨aealuse 14, EE–12618 Tallinn, Estonia; e-mail:
[email protected] ⋆corresponding author Received 27 February 2012, revised 19 April 2012, accepted 30 April 2012. Abstract Based on measurements of waves and currents obtained for a period of 302 days with a bottom-mounted RDCP (Recording Doppler Current Profiler) at two differently exposed locations, a model for significant wave height was calibrated separately for those locations; in addition, the Gulf of Riga-V¨ainameri 2D model was validated, and the hydrodynamic conditions were studied. Using wind forcing data from the Kihnu meteorological station, a set of current, water exchange and wave hindcasts were obtained for the period 1966–2011. Current patterns in the Gulf and in the straits were wind-dependent with characteristic wind switch directions. The Matsi coast was prone to upwelling in persistent northerly wind conditions. During the * The study was supported by the Estonian target financed project 0104s08, the Estonian Science Foundation grant No 8980 and by the EstKliima project of the European Regional Fund programme No 3.2.0802.11-0043. The complete text of the paper is available at http://www.iopan.gda.pl/oceanologia/ 422 U.¨ Suursaar, T. Kullas, R.