A MODEL FOR THE EVOLUTION IN RURAL-AREAS OF THE TEMPERATURE PROFILE IN THE BOUNDARY-LAYER AND A COMPARISON WITH MEASURED DATA

A local-scale one-dimensional model for the prediction of the thermal structure of the Planetary Boundary Layer (PBL) is presented. Time evo lution of the surface-layer and whole boundary-layer thickness is cons idered, together with an evaluation of the energy balance at the groun d. A thin transition layer (TTL) between the soil and the surface boun dary layer (SL) is introduced to provide a better definition of the bo ttom boundary condition for temperature T = T(t, z). Numerical tests o f the model have been performed and compared with measured temperature profiles and observed surface data for two places in different season s. The results show that the surface temperature controls the evolutio n of the whole profile. The bottom boundary condition is very importan t in the description of T(t, z). Finally it is shown that even a simpl e model can give realistic results when correct values of the characte ristic parameters are used.