Ice nucleus and aerosol measurements in the plume of the Johnstown, PA., steel mill

The Johnstown steel mill was observed to produce aerosols containing ice nuclei active at threshold temperatures between −6°C and −8°C (warmer than those observed for background air) and in concentrations up to a factor of 5 greater than background air in the temperature range of −10°C to −12°C, as...

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Published inGeophysical research letters Vol. 7; no. 5; pp. 397 - 400
Main Authors Schnell, R. C., Pueschel, R. F., Weickmann, H. K., Wellman, D. L.
Format Journal Article
LanguageEnglish
Published Blackwell Publishing Ltd 01.05.1980
Subjects
Aerosols
Freezing
Geophysics
Ice nuclei
Iron and steel plants
Nuclei
Plumes
Steel mills
Johnstown, Pennsylvania
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Summary:The Johnstown steel mill was observed to produce aerosols containing ice nuclei active at threshold temperatures between −6°C and −8°C (warmer than those observed for background air) and in concentrations up to a factor of 5 greater than background air in the temperature range of −10°C to −12°C, as tested with a combination membrane filter‐drop freezing technique. These ice nuclei were not observed in the plume at distances greater than 15 km downwind of the source.
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ISSN:0094-8276
1944-8007
DOI:10.1029/GL007i005p00397