Bffoct of Turbulont Mixing on the Adiabatic Lapse of the Air Temperature

[摘要] Thermodynamical treatment of the atmosphere assumes adiabatic. change and quasi-static process of the atmosphere, and this means to assume that the effects of radiation and turbulence are negligible. _??_owever these effects, especially the latter, may not be neglected in the case of the convection of the air_??_.Applying the aerodynamical theory of the jet from circular nozzle, the author studied the effect of turbulence on the distribution of the wind velocity and the temperature in the ascending current of the air. After complicated calculations, following results were obtained. The diameter of the ascending air increases linearly upward and the stream line of the air is as shown in Fig. 2. Fig. 3 shows the distribution of the upward wind velocity and the temperature at any horizontal section. The lapse rate of the temperature is largest on the central axis of the current and is larger than the dry adiabatic lapse rate by 0-10%.

[学科分类] 大气科学