Authors:
J. Tremblay Environment Canada Atmospheric Environment Service 100 Alexis-Nihon H4M 2N8 Saint-Laurent Quebec (Canada)

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R. Servranckx Environment Canada Atmospheric Environment Service 100 Alexis-Nihon H4M 2N8 Saint-Laurent Quebec (Canada)

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Abstract  

During a 1991 urban ozone study, simultaneous measurements of ozone and7Be, a tracer of stratospheric air, were obtained. The purpose of the study was to evaluate the potential contribution of stratospheric air to ground-level ozone concentrations observed in Montreal, Canada during the summer time. On June 27 and 28, 1991 two thunderstorms with cloud tops reaching the lower stratosphere hit the southwestern portion of the province of Quebec. High7Be counts that were recorded indicate that stratospheric air did reach the surface in the Montreal area. By using the7Be/ozone upper atmosphere ratio, the study concludes that, over these two days, the convective mixing of the atmosphere could have been responsible for a recorded 48 hour average 18% increase in ground-level ozone concentrations.

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation
1968
Volumes
per Year
1
Issues
per Year
12
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)