Parameterization of PBL from the Surface Wind and Stability Classes Data

Abstract

The aim of the present work is to determine the vertical profiles of wind velocity and turbulent exchange coefficient in the Planetary Boundary Layer (PBL). Here a simple but very effective PBL model is presented based on the similarity theory. As input to this model the internal to PBL parameters are needed. There are two ways to obtain these parameters from experimental data and they are called here “down-up” and “updown” approaches. The full description of the “up-down” approach is given in a number of papers by the same authors. It will be also presented here briefly. The main stress will be on the “down-up” approach allowing to obtain the wind and turbulence profiles using the data collected from automatic weather stations. Recently, such stations are introduced in the observational network of NIMH providing hourly measurements of the wind velocity at 10-m height as well as atmospheric stability classes (based on measurements of the horizontal wind pulsation). The proposed approach uses these data for determining the internal and external PBL parameters on the basis of the Similarity theory.