air_pollution

air_pollution - Air Pollution Prof. P. A. Ariya Department...

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Air Pollution Prof. P. A. Ariya Department of Chemistry & Department of Atmospheric and Oceanic Sciences McGill University
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Paul Shepson, 95
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Air pollution episodes Episodes are characterized by atmospheric conditions that minimize dilution of air pollutants Example is the case of 26 October 1948 in Pennsylvania (Donora in the Monongahela River Valley) in which sulfur dioxide fumes spread over the region for five days
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What are these special weather conditions? Wind Light winds favor pollution events (turbulent eddies mix the pollutants with the air more efficiently when the winds are strong) Light winds occur in anticyclones where the pressure gradient is weak Light winds are also favored where the frictional (surface roughness) effects are strongest, such as in urban areas and in mountain valleys
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Wind If each chimney emits a puff of smoke every second, then where the wind speed is low, the smoke puffs are closer together and more concentrated.
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This note was uploaded on 03/13/2010 for the course ATOC 245 taught by Professor Aparisa during the Spring '10 term at McGill.

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air_pollution - Air Pollution Prof. P. A. Ariya Department...

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