Investigations on helical dynamics of nonlinear media include the following :

• theoretical studyings of the new important instability in geophysical hydrodynamics related to large-scale helical structures generation by intense small-scale turbulence (together with R.Z.Sagdeev, A.V.Tur, G.A.Khomenko et al.); this effect was confirmed experimentally during course of two ship expeditions to Pacific ocean; on the basis of this instability the new helical mechanism of tropical cyclones forming was suggested;

• the helical mechanism of vortical structures excitation in geophysical hydrodynamics was generalized to the cases of plasmas and magnetics (together with E.Golbraikh, V.G.Pungin);

• the new physical system of precursors of large-scale natural hazards development was formulated and substantiated (together with A.F.Nerushev, A.A.Lazarev, S.N.Netreba);

• it was shown the possibility of transport processes weakening in turbulent media (for example, the turbulent viscosity reduction) if the helical structures generation occurs (together with A.V.Belyan, O.G.Chkhetiani).