Turbulent Transfer in Diabatic Conditions

[摘要] The turbulent exchange coefficient is assumed to be given as a linear combination of the exchange coefficient due to forced and that due to free convection. This assumption is in contrast with the assumption of the quadratic combination of the exchange coefficients which, according to Sellers, leads to the equation for the wind profile derived by Ellison, Yamamoto, and Panofsky et al. Then, a correction factor is introduced which makes the role of free convection in stable conditions less weighted than that in unstable conditions. Based on these assumptions, new formulae for wind and temperature profiles in diabatic conditions are derived. Under unstable conditions they are similar to those derived by above workers. Under stable conditions, by determining the values of parameters involved in the new formulae empirically, it is possible to make the calculated profiles agree with the observed ones.

[学科分类] 大气科学