LONGTERM VARIABILITY OF THE WATER MASS STRUCTURE ON THE ROMANIAN BLACK SEA SHELF

作者：Mihailov Maria Emanuela^*; Stefan Sabina; Diaconu Vasile; Lazar Luminita

来源：Romanian Reports in Physics, 2016, 68(1): 377-392.

• Black Sea
• Cold Intermediate Layer (CIL)
• upper mixed layer (UML)
• thermohaline structure

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 44 degrees 10'N (NIMRD data base). For the middle months 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 degrees C/year) while the cold water mass temperature is practically constant. The air temperature increases with 0.05 degrees 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 degrees 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/m(3) and the average cold water density in the summer period is only 14.24 kg/m(3).

• 出版日期2016