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On the possibility of convective overturning in the Słupsk Furrow overflow of the Baltic Sea

Zhurbas V., Elken J., Paka V., Piechura J., Chubarenko I., Väli G., Golenko N., Shchuka S.

Oceanologia

2011

No. 53 (3)

771-791

Closely spaced CTD transects across the Słupsk Furrow displayed a "downward-bending" of salinity contours below the salinity interface on the southern flank due to a transverse circulation in the saline water overflow. Numerical simulation of a gravity current in an idealized channel with geometry, dimensions and initial density stratification all much the same as in the Słupsk Furrow was applied to verify whether the downward-bending could be transformed into an inverted density stratification. Some arguments in favour of the possibility of convective overturning due to the differential transverse advection beneath the gravity current, brought on by the numerical simulations, are discussed.

Coastal cooling/heating events: Laboratory experiments

Demchenko N., Chubarenko I.

Acta Geophysica

2007

Vol. 55, no. 1

56-64

We report the results of laboratory experiments on water heating/cooling, performed in 5 m long water channel with a slope. About 63 series of photos were analyzed: for 3 locations, for 3 bottom slopes (3.7, 6.7 and 12 degrees) and for different Ra numbers. It was pointed out that there exist two types of mixing characterizing different circulations in the presence of slope: gravity current and undersurface jet; the thermal bar is the region where one type of mixing is replaced by another; the highest speed and flowrate are at the break point; the flow is three-dimensional.