Urban and rural ozone concentrations in Alberta,Canada |
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| Affiliation: | 1. Centro de Ciencias de la Complejidad, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico;2. Laboratorio de Tejido Conjuntivo, Instituto Nacional de Rehabilitación “Luís Guillermo Ibarra Ibarra”, Ciudad de Mexico 14389, Mexico;3. Instituto de Física, Universidad Nacional Autónoma de México, Ciudad de Mexico 04510, Mexico;4. Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, Querétaro 76230, Mexico;5. Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico;1. Department of Neurosurgery, University of Maryland School of Medicine, Baltimore, MD, United States;2. Manton Center for Orphan Disease Research, Boston Children''s Hospital, Boston, MA, United States;3. Department of Neurosurgery, Boston Children''s Hospital, Boston, MA, United States;4. Department of Pathology, University of Maryland School of Medicine, Baltimore, MD, United States;5. Department of Physiology, University of Maryland School of Medicine, Baltimore, MD, United States;1. Department of Chemical and Environmental Engineering, University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor, Malaysia;2. Low Dimensional Materials Research Center, Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia;3. Center of Nanotechnology and Advanced Materials, Faculty of Engineering, University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor, Malaysia;1. Department of Biotechnology & Medical Engineering, National Institute of Technology, Rourkela 769008, Odisha, India;2. Department of Botany & Biotechnology, Karimganj College, Karimganj 788710, Assam, India |
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| Abstract: | Ozone concentrations in Alberta cities typically exhibit a maximum in May (up to 35 ppb) and a minimum in November (as low as 4 ppb). This behaviour is similar to that of rural Alberta O3 concentrations. Annual O3 concentrations at six urban monitoring stations vary from 11 ppb to 22 ppb and are about one-half the values at rural stations. In winter, urban O3 concentrations are always smaller than rural concentrations and the cities act as sinks for O3. Although urban stations do not exceed Canada's maximum acceptable levels of daily (25 ppb) and annual (15 ppb) O3 concentrations as often as rural stations, the frequency is still quite large. Canada's hourly maximum desirable level (50 ppb) is exceeded 11 times more often at the remote (rural) station than at the downtown (urban) stations. |
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