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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:44 |
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Conference: Bucharest University Faculty of Physics 2012 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
Long - term variability of the water mass structure on the Romanian Black Sea shelf
Authors:
Emanuela MIHAILOV (1,2), Sabina STEFAN (2), V. DIACONU (1), L. LAZAR (1)
Affiliation:
1National Institute for Environmental Protection Research and Development, subunit National Institute for Marine Research and Development “Grigore Antipa” Constanta –Romania, Mamaia Blv. No. 300, RO-900591, Constanta, Romania
2 Meteorology and Environmental Physics Department, Faculty of Physics, University of Bucharest, Magurele Ilfov, 077125, Romania
E-mail
mihailov@alpha.rmri.ro
Keywords:
Black Sea, shelf cold water(SCW), upper mixed layer (UML), thermohaline structure
Abstract:
The long-term changes in the water mass thermohaline structure during the last four decades (1971 – 2010) is analyzed using the data collected on the 55 km hydrological section along the 44o10’N (NIMRD data base), for one month for each season (February, May, August and November); the changes of the temperature and salinity vertical distribution from one decade to another are relatively small. The upper mixed layer becomes warmer (about 0.1°C/year) while the cold water mass temperature is practically constant. The air temperature increases with 0.05°C/year for the analyzed period. At the same time the salinity decreases by 0.02 – 0.03 PSU/year in the entire water column. The 8°C isotherm boundary of cold water mass is more appropriate for shallow waters as 70% of the upper limit densities are below 14.2 kg/m3 and the average cold water density in the summer period is only 14.24 kg/m3.
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