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11 terms

Air Pollution

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Stability, wind, and radiation
Atmospheric problems governing air pollution
Stability
-air pollution is trapped near the surface in stable atmosphere
-anticyclones are bad dispersal
-STH are also bad for dispersal
-temperature inversions are very bad
Wind
-dispersal/dilution
-transports pollutants long distances
Radiation
Sunshine encourages photochemical pollution
Photochemical pollution
Result from fuel combustion exhaust and introduction of UV energy
− Nitrogen Oxides and Volatile Organic Compounds interact with UV
radiation
Clean air act of 1970
EPA must set standards and monitor certain "criteria" pollutants. Carbon monoxide, sulfur dioxide, tropospheric ozone, lead, nitrogen and particulates
Threshold pollutants
OK in small doses but have an effect after a certain threshold is reached.
-includes all pollutant criteria except ozone
Non-threshold pollutants
Cause problems as soon as they exist
-includes ozone
Primary pollutants
produced by humans & nature (CO, CO2, SO2, NO, hydrocarbons, particulates).
Secondary pollutants
pollutants that form from chemical reactions that occur when primary pollutants come in contact with other primary pollutants or with naturally occuring substances, such as water vapor.
-industrial smog
-photochemical smog
-acid rain
acid rain
rain containing acids that form in the atmosphere when industrial gas emissions (especially sulfur dioxide and nitrogen oxides) combine with water