Alexander Bershadskii

At certain conditions a system of well-separated quasi-point vortices can appear in two-dimensional turbulence. Such system contains main part (almost entire) of the flow enstrophy (mean squared vorticity). Spectral properties of the two-dimensional turbulence in the presence of the system of the quasi-point vortices have been studied using notion of the distributed chaos. Results of direct numerical simulations of decaying turbulence, of turbulence with small-scale forcing, of quasi-geostrophic turbulence with thermal damping and of turbulent thermal convection on a sphere as well as results of the Global Atmospheric Sampling Program (GASP, using commercial aircraft) measurements in the tropospheric and stratospheric turbulence over mountainous terrain (the small-scale forcing) have been used for this purpose.