Trichlorofluoromethane as a tracer of urban air masses |
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| Affiliation: | 1. Student Research Committee, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran;2. Pharmaceutical Analysis Research Center and Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran;3. Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran;4. School of Life Sciences, University of Sussex, Falmer, Brighton BN1 9QG, UK;5. Grupo de Investigaciones Farmacéutico-Fisicoquímicas, Departamento de Farmacia, Facultad de Ciencias, Universidad Nacional de Colombia – Sede Bogotá, Cra. 30 No. 45-03, Bogotá, D.C., Colombia;6. Research Center for Pharmaceutical Nanotechnology and Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran;7. Kimia Idea Pardaz Azarbayjan (KIPA) Science Based Company, Tabriz University of Medical Sciences, Tabriz, Iran;1. Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran;2. Pharmaceutical Analysis Research Center and Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran;3. Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran;4. Grupo de Investigaciones Farmacéutico-Fisicoquímicas, Departamento de Farmacia, Facultad de Ciencias, Universidad Nacional de Colombia – Sede Bogotá, Cra. 30 No. 45-03, Bogotá, D.C., Colombia;5. Research Center for Pharmaceutical Nanotechnology and Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran;6. Kimia Idea Pardaz Azarbayjan (KIPA) Science Based Company, Tabriz University of Medical Sciences, Tabriz, Iran;1. Student Research Committee, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran;2. Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran;3. School of Life Sciences, University of Sussex, Brighton BN1 9QG, UK;4. Grupo de Investigaciones Farmacéutico-Fisicoquímicas, Departamento de Farmacia, Facultad de Ciencias, Universidad Nacional de Colombia, Sede Bogotá, Cra. 30 No. 45-03, Bogotá, D.C., Colombia;5. Research Center for Pharmaceutical Nanotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran;6. Pharmaceutical Analysis Research Center, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran;7. Kimia Idea Pardaz Azarbayjan (KIPA) Science Based Company, Tabriz University of Medical Sciences, Tabriz, Iran |
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| Abstract: | Trichlorofluoromethane (CCl3F) measurements in 34 air samples collected at remote Whiteface Mountain N.Y, (elevation 1.5 km) during September 26 through October 29,1978, using electron capture gas chromatography are described. The day-to-day CCl3F concentration varies between values of 163 and 121 ppt (10−12. v/v) with an average concentration of 137 ppt. Simultaneous measurements of ozone and Be along with relevant meteorological parameters are also presented. The O3-CCl3F concentration interrelation suggests that CCl3F can be used as an area source urban tracer. Periods of elevated O3 levels associated with high 7Be concentration concomitantly marked by low CCl3F concentrations are explained qualitatively in terms of intrusion of upper atmospheric/stratospheric air into the lower tropospheric air masses. It is shown that the contribution of this factor is quite significant and it must be properly taken into account while establishing the role of CCl3F as a tracer through its measurements in the lower troposphere. |
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