Accession Number : AD0668439

Title :   THE OPERATIONAL DISSIPATION OF SUPERCOOLED FOG: PROJECT COLD COWL 1967-1968.

Descriptive Note : Technical rept.,

Corporate Author : AIR WEATHER SERVICE SCOTT AFB ILL

Personal Author(s) : Appleman,Herbert S.

Report Date : APR 1968

Pagination or Media Count : 16

Abstract : In the winter of 1967-1968, the Air Weather Service (AWS) carried out its first operational weather-modification program at Elmendorf AFB. An AWS weather-reconnaissance aircraft (WC-130E) was used to seed supercooled fog with dry ice. A prescribed flight path was flown a specified distance upwind from the target area, and crushed dry ice disseminated at rates of 12.5 or 25 pounds per mile. It was found that a clearing generally occurred in 30 to 45 minutes. The only real failure occurred in a case that may have been an ice fog; in addition, proper positioning of the hole proved a major problem throughout the program. Despite these difficulties, an estimated 200 successful take-offs and landings were made using the artificially produced clearings. Supplemental tests were carried out using airborne liquid CO2 dispensers and silver iodide pyrotechnics. (Author)

Descriptors :   (*FOG, REMOVAL), (*WEATHER, *CONTROL SYSTEMS), ALL WEATHER AVIATION, TAKEOFF, AIRCRAFT LANDINGS, LANDING FIELDS, MILITARY FACILITIES, CLOUDS, CARBON DIOXIDE, SILVER COMPOUNDS, ALASKA, IODIDES, METEOROLOGICAL PHENOMENA, TRANSPORT AIRCRAFT, PARTICLE SIZE, TEST METHODS, ICE FOG

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE