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| Bulgakov, Sn; Kushnir, Vm; Martinez, A. |
| A statistical evaluation of vertical current velocity profiles w(z) has been undertaken using data provided by current meter profilers. The calculation of profiles w(z) involves the estimation of the standard deviation of vertical current at each depth level, and the standard deviation of the statistical variability of that estimate. Profiles w(z) have been computed for the northwestern Black Sea, using current meter and CTD data from three surveys carried out during 1992-1994. The calculations show w(z) to have a two-layered structure, with zero values occurring in the main pycnocline. Such vertical current structures are consistent with a hydrodynamic model, whereby the current field is induced by buoyancy fluxes through the lateral basin boundaries.... |
| Tipo: Text |
Palavras-chave: Mer Noire; Circulation verticale; Chimie marine; Optique marine; Black Sea; Vertical circulation; Hydrochemistry; Hydrooptics. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/00325/43602/43921.pdf |
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| Bulgakov, Sn; Kushnir, Vm. |
| A possible three-layer vertical structure of the horizontal circulation in the Black Sea was inferred on the basis of theoretical analysis and laboratory tests (Bulgakov et al., 1993 a, b). The existence of an unknown anticyclonic counter-current at the main pycnocline depths (100-400 m) under the surface cyclonic Main Black Sea Rim current was predicted. It may have a horizontal scale of the order of the Rossby deformation radius (10-20 miles), with maximum velocity of about 0.20-0.25 m/s. To investigate the vertical structure of the current field, special field observations using an OLT acoustic profiler and mooring stations were carried out in autumn 1993 in the Northern Black Sea. The anticyclonic flow with the predicted characteristics was observed... |
| Tipo: Text |
Palavras-chave: Black Sea circulation; Cyclonic current; Anticyclonic counter-current. |
| Ano: 1996 |
URL: http://archimer.ifremer.fr/doc/00096/20721/18358.pdf |
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