00000nam 2200000za 4500 9.840828 CaOODSP 20221107151934 cr ||||||||||| 170801s1971 oncbd ob f000 0 eng d CaOODSP eng n-cn-on M38-8/106E-PDF M38-8/106 A study of the meteorological conditions which developed a classic "fumigation" inland from a large lake shoreline source [electronic resource] / M.S. Hirt ... [et al.]. Ottawa : Information Canada, 1971. 13, [18] p. : charts, maps Reprint series ; RS 104 Cover title. At head of title: Mines Branch program on environmental improvement. "Reprint no. 71-132 from the Proceedings of the 64th Annual Meeting of the Air Pollution Control Association held in Atlantic City, New Jersey, June 27 to July 2, 1971." Historical publication digitized from print 2017 [by Natural Resources Canada]. Includes bibliographical references. "The study describes the change in meteorological conditions and associated air quality both at ground level and aloft from just prior to sunrise, at which time a stable atmosphere and low ground level pollutant concentrations existed, to the early afternoon of the same day when solar heating resulted in the development of a classic inversion fumigation condition for a period of a few hours. Profiles of temperatures and winds were obtained using specifically designed battery operated radiosonde receivers with slow rise balloons. The spatial distribution of sulphur dioxide concentrations was obtained utilising two automobiles and a helicopter each instrumented with a continuous rapid response analyser. The plume was measured to rise to a level at which an intensification of an inversion was noted. Average ground level concentrations as high as 0.90 ppm were measured at a distance of 6 km from the source during the inversion fumigation. The measured concentrations compared well with predictions using established formulae"--Abstract, p. [1]. gccst Electric power stations gccst Air pollution gccst Air quality gccst Weather Hirt, M. S. Canada. Natural Resources Canada. Canada. Department of Energy, Mines and Resources. Canada. Mines Branch. Reprint series - Dept. of Energy, Mines and Resources, Mines Branch ; RS 106 (CaOODSP)9.834843 PDF 2.88 MB https://publications.gc.ca/collections/collection_2017/rncan-nrcan/M38-8/M38-8-106-eng.pdf 300185