Concentrations of atmospheric constituents observed at Alert,Canada, in relation to air trajectories and synoptic systems |
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| Authors: | Y S Chung |
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| Institution: | (1) Atmospheric Environment Service, Environment Canada, 4905 Dufferin Street, M3H 5T4 Toronto, Downsview, Ontario, Canada |
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| Abstract: | A meteorological analysis is presented for environmental data set obtained from the Canadian Arctic haze study, which is part of AGASP-II. Results of the study indicated that atmospheric carbon dioxide (CO2), methane (CH4), sulphate (SO4
=), ozone (O3) and other air pollutants observed at Alert, N.W.T. underwent periodical fluctuations. It was found that high concentrations of these atmospheric constituents were associated with a deep (1430–2074 m) inversion and with a major anticyclone. In contrast, relatively low values of these constituents were associated with a cyclonic disturbance near Alert. High concentrations of these constituents occurred with air trajectories coming from the N-W direction, while low values occurred with S trajectories. In addition, examinations of satellite imagery with other meteorological data suggested that volcanic inputs of ash and gases from Augustine Island, Alaska were negligible for the observed high values of these constituents at the ground level at Alert. |
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| Keywords: | Arctic haze meteorological analysis concentrations of atmospheric constituents and volcanic emission of Augustine Island |
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