Bogdanov S.R., Zdorovennov R.E., Palshin N.I., Zdorovennova G.E., Terzhevik A.Yu., Gavrilenko G.G., Volkov S.Yu., Efremova T.V., Kuldin N.A., Kirillin G.B.
This paper presents a method for deriving turbulent stresses using a pair of ADCPs with one or two points of beam intersections. A specific experiment, which includes measurements of water temperature, under-ice irradiation levels, and velocity components in the convectively mixed layer of a shallow ice-covered boreal lake, validated the method. The experimental data allows calculations of both the pulsation intensities along the three orthogonal axes and off-diagonal components of the Reynolds tensor. The specific features of spring under-ice convection processes, in particular, the anisotropy of turbulent pulsations and the correlation of turbulence energy with the turbulence energy production (as the buoyancy flux), were described using the horizontal homogeneity assumption. Finally, the paper presents a qualitative analysis of the parameters and dynamics of energy-containing structures developing in the convective layer of small ice-covered lakes in spring.
