FOG FORECASTING AND REMOVING : CASE STUDY

Abstract

The radiation fog is being now the most occurred weather phenomena in Cairo. It was reported that a number of 300 air flights were diverted from Cairo airport due to heavy fog conditions during 40 days. To improve our understanding to the fog climatology, 20 years of data were analyzed from 1970-1990. The hourly observations were used to calculate the frequency of occurrences of fog and the record length. The observed frequency was found to be mainly dependent upon wind speed, horizontal visibility and relative humidity. The fog index was derived using this data from the above factors and it was found that it could be used in fog forecasting with high accuracy. The fog removing processes• were also applied and . seeding with some hygroscopic, N02 and C02 were carried out. The

initial results indicates that warm fog can be removed. The present work suggest more work to be carried out in the subject where the primary results seems to be much encouraging.