Field Experiments on the Optical, Microphysical and Meteorological Characteristics of Natural Fogs and Clouds.
Final technical rept. Mar 79-Jan 81,
UNIVERSITY OF MANCHESTER INST OF SCIENCE AND TECHNOLOGY (ENGLAND) DEPT OF PHYSICS
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The experimental program incorporates measurements of condensation nuclei concentrations and associated meteorological parameters made within the air feeding into clouds, as well as within such clouds. Instruments include modifications of Keily probe electrostatic disdrometers, PMS spectrometer probes, a Mee CCN counter and a PMS ASASP probe. A passive optical scattering instrument has also been used, in conjunction with a Barnes transmissometer operating at about 11.0 micrometers. Data for a variety of conditions and meteorological situations are presented. Theoretical work has included the development of an airflow model capable of predicting the microphysical properties of clouds over the summit of Great Dun Fell from a knowledge of the relevant parameters concerning the air parcels from which the clouds are formed. Computational studies have been made of the role of undersaturated air upon droplet size distributions. Author
- Atmospheric Physics