Oceanographic Measurements of the West Black Sea: June 15 to July 5, 1996
Abstract
An extensive survey was carried out in the Black Sea exit region of the Strait of Istanbul (Bosporus). The data described in this report builds on the knowledge learned during the Black Sea 1995 sea trial. Extensive measurements were made at the northern sill so as to describe the internal hydraulic conditions. It is shown that flow over the sill at three measurement points (south of the sill, on the sill and north of the sill) is subcritical. During the observation period the flow of Mediterranean water was continuous (i.e., no blockage events occurred as the relative sea level difference did not exceed 45 cm). The Mediterranean bottom boundary layer showed strong levels of turbulence and measurements of bottom friction coefficient range from 5 to 15 x 10(exp -3). The flow of Mediterranean water on the continental shelf is subcritical and the dilution occurs at a rate of 0.1 psu/km. Echo sounder imaging identified the major canyons which carry the effluent out to the continental slope. During the shelf survey a cyclonic circulation pattern was observed and during the deep sea survey the circulation pattern showed a general eastward direction with possibly a Rossby wave instability of approximately 70 km in wavelength. NOAA satellite infrared images could not be used to reveal such instabilities.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1999
- Accession Number
- ADA377116
Entities
People
- D. Di Iorio
- E. Gezgin
- H. Yuece
- P. Guerrini
- T. Akal
Organizations
- SACLANT ASW Research Centre