Fog Drop Measurements at Barrow, Alaska
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
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Arctic fog droplets were sampled on chloride-sensitive gelatin-coated glass slides at Point Barrow, Alaska, in the summer of 1971. The collection efficiency of the fog droplets was determined. About 20,000 fog drop radii were measured. The results of analysis of the concentration and the size distribution of fog drops are presented in the form of tables and photomicrographs. It is shown that the concentration and the size distribution changed rapidly with time and space the drop radii ranged widely between 3.3 and 65 micrometers the mean radius was 10 micrometers the maximum concentration was 24 dropscc and the liquid water content was 0.09 gcubic meter at a visibility of 250 m. Calculations were made of the attenuation by fog at wavelengths of 0.571 and 1.06 micrometers for the observed size distributions and concentrations of fog drops.