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Variations in the hydrodynamic conditions were studied on the basis of 336 days of measurements with a Doppler current profiler. With wave data as a calibration reference, a semi-empirical hindcast of wave parameters is presented in the fetch-limited near-shore area for the period 1966-2008. A resultant 4-6 cm s-1 westward current dominated along the coast. Occasional fast sub-surface westward currents under modest wind forcing, as well as asymmetrical vertical profiles for westward and eastward currents indicated the influence of upwelling-related baroclinic coastal jets. The average frequency of upwelling was estimated at 17%; some of the events were identified in near-homothermic winter conditions on the basis of salinity and multi-layer flow records. While the mean sea level trend at Narva-Jo~esuu roughly approximated the global estimates for 1899-2009, the annual maximum sea level increase was 5-8 mm yr-1. Both mean and maximum wave heights declined as a result of decreasing winds from the north.
Słowa kluczowe
Czasopismo
Rocznik
Tom
Strony
391--416
Opis fizyczny
bibliogr. 45 poz., tab., wykr.
Twórcy
autor
- Estonian Marine Institute, University of Tartu, Mäealuse 14, EE-12618 Tallinn, Estonia, ulo.suursaar@ut.ee
Bibliografia
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- 29.Soomere T., Zaitseva I., 2007, Estimates of wave climate in the northern Baltic Proper derived from visual wave observations at Vilsandi, Proc. Estonian Acad. Sci.-Eng., 13 (1), 48-64.
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- 33.Suursaar Ű., 2009, Interpretation of Doppler effect-based vertical velocity measurements in the coastal waters of Estonia, Baltic Sea: possible influence of upwelling, Langmuir circulation and turbidity, Fluid Structure Interaction, WIT Trans. Built Environ., Vol. 105, WIT Press, Southampton-Boston, 193-203.
- 34.Suursaar Ű., Aps R., 2007, Spatio-temporal variations in hydro-physical and -chemical parameters during a major upwelling event off the southern coast of the Gulf of Finland in summer 2006, Oceanologia, 49 (2), 209-228.
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- 37.Suursaar Ű., Kullas T., 2006, Influence of wind climate changes on the mean sea level and current regime in the coastal waters of west Estonia, Baltic Sea, Oceanologia, 48 (3), 361-383.
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Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BUS8-0003-0013