Air quality - Air Quality What is a pollutant airborne...

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Air Quality What is a pollutant? airborne particles and gases that occur in concentrations that endanger the health and well being of organisms. Examples of natural pollutants: a. Dust b. volatile organic compounds (VOCs) from vegetation. Example: natural haze in the Smoky Mountains. c. Sulfur dioxide from volcanoes.
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Air Pollution Types A. Primary pollutants B. Secondary pollutants Chemical reactions from primary pollutants
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Air Pollution Trends – downward – Why? Ozone
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Controls on Air Quality 1. Air pollution sources – where are they concentrated?
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Air quality across the Carolinas
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2. Atmospheric dispersion Controlling factors A. Wind speed – During what periods (diurnal and seasonal) are the winds the weakest? (NIGHT... B. Atmospheric stability Nocturnal radiation inversion **INVERSION: ABSOLUTELY STABLE ATMOSPHERE.. Vertical motions are inhibited Daytime convection
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Subsidence Inversion: --ozone levels go down at night and up during the day Bermuda High
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