A consistent account of plasma turbulence in magnetohydrodynamics equation s describing transport processes across the magnetic field is presented. The structure of the perpendicular shock wave generated in the solar atmosphere, as a result of either local disturbance of the magnetic field or dense plasma cloud motion with a frozen-in magnetic field, has been investigated. The region of parameters in the solar atmosphere at which the electron-ion relative drift velocity u exceeds the electron thermal velocity Ve and generation of radio emission becomes possible, has been determined. The plasma turbulence inside the front has been shown, under conditions of solar corona, not to cause the oscillation structure of shock front to break down. Under chromospheric conditions, the shock profile is aperiodical. Then, the condition u > Ve can be satisfied and shock waves having a n Alfv6n Mach number M which exceeds the critical value Mc ~3.3 for aperiodical shock waves can exist (Eselevich et al., 1971a).
Arguments are given in favour of the fact that perpendicular shock waves are generated in the Sun's atmosphere When dense plasma clouds, with a frozen-in magnetic field, are expanded.