On the vertical distribution of the kinetic energy in the low-frequency range in the Gulf of Finland

Author

Talpsepp, L. ; Lilover, M.-J.

Author_Institution

Inst. of Marine Syst., TTU, Tallinn, Estonia

fYear

2012

fDate

8-10 May 2012

Firstpage

1

Lastpage

7

Abstract

In this paper data of the bottom-mounted ADCP (Acoustic Doppler Current Profiler) are studied. The dominating periodic processes are found to be with periods of 4.5-5.5 days (low-frequency oscillations), with periods of 27-28 hours and with near-inertial periods. As spectral calculations showed, the low-frequency oscillations, not found in the surface layer, increased with depth below the picnocline and again near the bottom. Vertical distribution of the amplitudes is similar to the bottom-trapped topographic waves, which may be induced by the variable wind.

Keywords

ocean waves; wind; Acoustic Doppler Current Profiler; Gulf of Finland; amplitude vertical distribution; bottom-mounted ADCP data; bottom-trapped topographic waves; dominating periodic processes; kinetic energy; low-frequency oscillations; low-frequency range; near-inertial periods; picnocline; spectral calculations; surface layer; variable wind; Computational modeling; Kinetic energy; Oscillators; Sea measurements; Sea surface; Surface topography; Surface waves;

fLanguage

English

Publisher

ieee

Conference_Titel

Baltic International Symposium (BALTIC), 2012 IEEE/OES

Conference_Location

Klaipeda

ISSN

2150-6027

Print_ISBN

978-1-4673-1413-8

Type

conf

DOI

10.1109/BALTIC.2012.6249203

Filename

6249203