It is shown by the results measured in the atmosphere that the eddies with temperature sharp Changing section via temperature discontinuous surface may frequently occur in an unstable stratified turbulent medium. Because the structure of temperature discontinuous surface is very asymmetrical,the properties of light propagation of turbulent medium would departure the theory of isotropic turbulence. The occurring of discontinuous surface is probably related with the removing of eddies in the vertical direction in the stratified turbulent medium. The production and removing of these eddies can be named " burst".