稳定大气边界层的湍流结构和相似律

ON SIMILARITY AND THE TURBULENT STRUCTURE IN THE STABLE BOUNDARY LAYER

本文从包括辐射影响在内的大气边界层模式出发,求解了稳定层结条件下湍流热通量和湍流应力的垂直廓线。另外,引入湍流的局地尺度L(z)、u_＊(z)和θ_＊(z),各湍流量的局地尺度可以表示成z/L(z)的函数,由此可将相似理论推广到全边界层应用,相似律的预告和观测资料很一致。

In the stably stratified boundary layer, the vertical profiles of momentum and temperature flux can be obtained from a boundary layer model which includs parameterizing the long-wave radiation. In addition, the Monin-Obukhov similarity theory can be extended to the whole SBL, by using the local turbulent scales L(z), U*(z), θ*(z) in place of surface layer scales. The similarity predications are in agreement well with observational data.