Cold Environment Fogs And Measurements

James E Jiusto; G.Garland Lala

doi:10.1117/12.935861

22 September 1983 Cold Environment Fogs And Measurements

James E Jiusto, G.Garland Lala

Proceedings Volume 0414, Optical Engineering for Cold Environments; (1983) https://doi.org/10.1117/12.935861
Event: 1983 Technical Symposium East, 1983, Arlington, United States

Abstract

For several years radiation fog field programs have been conducted at Albany, NY, with an emphasis on understanding the basic mechanisms leading to dense fog formation. This past year a cooperative effort ("Fog Project-1982") involved nine university, federal and private research laboratories, including NCAR staff and their remote system of 25 portable automated mesonet (PAM) weather stations. A number of comprehensive data sets (boundary layer meteorology and cloud physics variables) during the 14-16 hour nocturnal evolution of fog have been obtained. In particular, the extinction of light in the visible and infrared (10.6 pm wavelength), associated visibility, drop size distributions, liquid water content, and vertical tethered-balloon soundings provided new insights into the structure of fog. A CO2 laser transmissometer was developed that yielded direct information on fog density. During October of 1981 and 1982, a number of radiation fogs occurred that were super-cooled in their lowest 20-50 m. This posed certain troublesome to critical measurement problems with several instruments. Cold environment techniques were devised to overcome some of these instrumentation difficulties.

Citation Download Citation

James E Jiusto and G.Garland Lala "Cold Environment Fogs And Measurements", Proc. SPIE 0414, Optical Engineering for Cold Environments, (22 September 1983); https://doi.org/10.1117/12.935861

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