Synoptic-Scale Variability in Atmospheric Suspended Sulfate Concentrations.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO
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The spatial variation in atmospheric suspended sulfate concentrations are studied for evidence of meteorologically linked sulfate transformation and transportation. Low frequency every 12-14 days data from 41 National Air Surveillance Network stations as well as higher frequency every 2-3 days data available from two special studies are examined. Variations in high frequency data with wind direction for St. Louis, Missouri, are compared to local and regional sources of precursor pollutants for two one-year periods January-December 1969 and April 1975-March 1976. Spatial variations in low frequency sulfate concentrations during the spring season March-May for the six-year period 1969-1974 are compared with synoptic weather and wind circulation patterns. These comparisons indicate that regional and local sulfate transport can largely account for large-scale sulfate variations. Sulfate transformation due to humidity, temperature and sunlight intensity do not adequately explain observed variations, but may be of secondary importance. The existence of regionally high concentrations of sulfate in the northeastern United States and of a general summertime peak in sulfate values is confirmed. Author
- Atmospheric Physics
- Air Pollution and Control