Investigation of the vertical distribution of the sound speed of the Gulf of Gdansk in the years 2000-2010

• Autorzy: Grelowska G. , Witos D.
• Języki publikacji: EN

Abstrakty

EN

The conditions of the acoustic wave propagation in the southern Baltic are much more complex than in other shallow waters. In the typical shallow water, seasonal changes in acoustical conditions in the upper layer, of the depth of about 60-70 m, are observed. They are caused by variation of the annual meteorological conditions. Most often, in the deep water layer, acoustical conditions are stable throughout the year. However, in the Southern Baltic they change during the year also in the deep water layer. They depend on the inflows of highly saline water from the Northern Sea through the Danish Straits, which evoke a dense bottom current increasing the salinity at the bottom. The vertical sound speed distribution in the Southern Baltic is strongly dependent on the hydrological conditions. In the paper the characteristic elements of acoustic climate of the Southern Baltic will be considered, based on data concerning the Gulf of Gdansk. Averaged characteristics of temperature, salinity and sound speed for the years 2000-2010, as well as anomalies, have been determined.

Słowa kluczowe

EN

shallow water acoustics; underwater acoustic climate

• Wydawca: Polskie Towarzystwo Akustyczne. Oddział Gdański
• Czasopismo: Hydroacoustics
• Rocznik: 2016
• Tom: Vol. 19
• Strony: 129--137
• Opis fizyczny: Bibliogr. 12 poz., rys.

Twórcy

autor

Grelowska G.

• Gdansk University of Technology Faculty of Ocean Engineering and Ship Technology Department of Hydromechanics and Hydroacoustics Narutowicza 11/12, 80-233 Gdansk, Poland

autor

Witos D.

• Gdansk University of Technology Faculty of Ocean Engineering and Ship Technology Department of Hydromechanics and Hydroacoustics Narutowicza 11/12, 80-233 Gdansk, Poland

Bibliografia

• [1] Del Grosso, W. A.; Mader, C. W., Speed of sound in pure water, J. Acoust. Soc. Am. 1972, 52, 1442-1446.
• [2] G. Grelowska, Prevailing patterns of the sound speed distributions in the environment of the southern Baltic, Archives of Acoustics, Vol. 25, 3, 359-368, 2000.
• [3] Hela I., The Sound Channel of the Baltic Sea, Geophysica, 5, p.153-161, 1958. [
• [4] Holec M., Ratowski J., Pionowe rozkłady i gradient prędkości dźwięku w południowym Bałtyku i ich bieg roczny, Proc. Of the 25th Open Seminar on Acoustics, 143-151, Poznań 1978.
• [5] Klusek Z., The conditions for sound propagation in the southern Baltic, Ed. Institute of Oceanology, 1, 269 pp., Sopot 1991.
• [6] E. Kozaczka, G. Grelowska, Nieliniowe właściwości wody, Polish Naval Academy, 121-146, Gdynia 1996
• [7] Kozaczka E., Grelowska G., Shipping low frequency noise and its propagation in shallow water, Acta Physica Polonica A, 119, 6, 1009-1012, 2011.
• [8] Kozaczka E., Grelowska G., Szymczak W., Kozaczka S., Processing data on sea bottom structure obtained by means of the parametric sounding, Polish Maritime Research, 19, 4, 3-10, 2012.
• [9] Kozaczka E., Grelowska G., Kozaczka S., Szymczak W., Detection of objects buried in the sea bottom with the use of parametric echosounder, Archives on Acoustics, 38, 1, 99-104, 2013.
• [10] Piechura J., Beszczyńska–Moeller A., Inflow waters in the deep regions of the southern Baltic Sea: Transport and transformation (corrected version). Oceanologia, 46(1), 113- 141, 2004.
• [11] The BACC Author Team, Assessment of climate change for the Baltic Sea basin, Springer, Berlin-Heidelberg, 2008.
• [12] The BACC Author Team, Second assessment of climate change for the Baltic Sea basin, Springer, 2015.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017)