METEOROLOGY OF THE GREAT DUN FELL CLOUD EXPERIMENT 1993

Synoptic and local meteorological conditions during the Spring 1993 Gr ound-based Cloud Experiment on Great Dun Fell are described, including cloud microphysics, general pollution levels and sources of air, espe cially for five case studies selected for detailed analysis. Periods w hen air was flowing across the hill are identified and the extent to w hich air mixed into the cloud from above reached the ground is estimat ed. To aid the interpretation of cloud chemistry and microphysics meas urements, the horizontal and vertical extent of the cloud are used to estimate droplet lifetimes and to comment on the influence of complex terrain on peak supersaturation. (C) 1997 Elsevier Science Ltd.