Features of a thermal bar development in fresh water reservoir during ice cover melting are investigated using mathematical modelling. It is shown that the anomalous feature of water (maximum density at 4 ◦C) at given hydrometeorological conditions leads to two hydrodynamic effects which have opposite influence on the thermal bar movement. On the one side the thermal bar is formed near the shore and moves to the center of the reservoir, and on the other side vortex is arisen near the ice edge slowing down this process.
Department of Physics of Sea and Inland Water, Faculty of Physics, M.V.Lomonosov Moscow State University, Moscow 119991, Russia
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