Waves, currents and sea level variations along the Letipea - Sillamäe coastal section of the Southern Gulf of Finland

• Autorzy: Suursaar U.
• Języki publikacji: EN

Abstrakty

EN

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-Jõesuu 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

EN

wave; variation; hydrodynamic condition; measurement; Doppler current prolifer; calibration; semi-empirical hindcast; water parameter; upwelling; coastal jet; climate change; Baltic Sea; Letipea-Sillamae coastal section; Finland Gulf

• Wydawca: -
• Czasopismo: Oceanologia
• Rocznik: 2010
• Tom: 52
• Numer: 3
• Opis fizyczny: p.391-416,fig.,ref.

Twórcy

autor

Suursaar U.

• University of Tartu, Maealuse 14, EE-12618 Tallinn, Estonia