THE VERTICAL STRUCTURE OF THE STABLE BOUNDARY-LAYER OVER SMALL TOPOGRAPHIC FEATURES

An analysis of fractional speed-up induced by small topographic featur es in atmospheric stable conditions is presented. The effects of both roughness and slope changes, under different stability conditions, are modelled in the framework of the linear theory. Under near-neutral co nditions the adopted models of wind speed-up induced by topographic sl ope and roughness variation reproduce the experimental results fairly well. In more stable cases, the model works well in the inner layer, w hile at the upper levels some discrepancies are encountered. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.