DBPapers
DOI: 10.5593/SGEM2016/B32/S15.119

UNDERWATER SOUND SPEED FEATURES ON THE WESTERN BLACK SEA SHELF

M.E. Mihailov, L. Buga, L. Dumitrache, L.F. Constantinoiu
Wednesday 7 September 2016 by Libadmin2016

References: 16th International Multidisciplinary Scientific GeoConference SGEM 2016, www.sgem.org, SGEM2016 Conference Proceedings, ISBN 978-619-7105-62-9 / ISSN 1314-2704, June 28 - July 6, 2016, Book3 Vol. 2, 915-920 pp

ABSTRACT
This paper presents recent results of CTD investigations on specific physical parameters on the Western Black Sea shelf. The effect of temperature,pressure, salinity and oxygen in seawater as well as the influence of currents on sound speed variations are investigated. Environmental data collected along 44.56°N between 30.2°E and 30.3°E during late winter in 2013 show a permanent maximum sound velocity around 20m at velocities less than 1465m/s, which corresponds to the Black Sea Cold Intermediate Layer (CIL, characterized by 8°C). During warm season in June 2015, for 44.17°N and 30.20°E, the corresponding sound velocity on the CIL is1465m/s located between 49 –70m depth. The minimum velocities are recorded at the surface due to the characteristic features of the seawater (1506m/s in June 2015). During the warm season, the corresponding CIL sound velocities (determined as 1465m/s) are found at more than 45 m depth due to the strong stratification of the Black Sea watermasses.

Keywords: Black Sea, underwater sound, CIL, watermasses