Slupsk Sill

The first deep basin downstream of the entrance sills is the Bornholm Basin (Fig. 10.1). This basin has a maximum depth of more than 90 m and is separated from the next downstream basin by the Slupsk Sill (sill depth 60 m). The buffering properties of the Bornholm Basin play an essential part for the effectiveness of MBls in other central basins. The thermohaline conditions in the Bornholm Basin are also considerably important for the evolution of stagnation in the central Baltic deepwater. In general, there is a frequent inflow of lower amounts of highly saline water that penetrates across the sills into the ArkonaBasin during each baroclinic or weak barotropic inflow event. This water is trapped into the... 

The salinity of the Bornholm Basin below the permanent halocline is a measure for the estimation of the impact of weak inflows on the central Baltic deep water. During periods of low inflow activity, salinity and thus density decreases in the deep water of the Bornholm Basin. Depending on the volume of saline water and its density, inflows below the MBI magnitude — but sometimes even MBIs — fill up only that basin, and the saline water does not pass to a greater extent the Slupsk Sill downstream through the Slupsk Channel into the Gotland Basin (cf. Fig. 10.2). 

In the Bornholm Basin, which was filled with dense, cold water from the January MBI, the warm jet appeared on top of it. A very detailed study, by fortunate coincidence, of its passage over the Slupsk Sill was canied out by Paka et al. (2006), revealing even features of the... 

Paka, V. T., Golenko, N.N., Korzh, A.O., 2006. Distinctive features of water exchange across the Slupsk Sill (a full-scale experiment). Oceanologia, 48 (S), 37-54. 

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