Northeast Regional High Sulfate Episodes

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Northeast Regional High Sulfate Episodes
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Sulfate contributes 70 to the aerosol light
extinction
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Heavy rains in OH, IN, and KY on October 12
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High pressure system and warm front in the
Northeast region
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Summary

• There are at least two major source regions of
  sulfate in northeast US, one from northern
  Michigan and southern Canada region, and the
  other from Ohio valley region.
• The influence of the two sources depends on the
  regional meteorology and local weather conditions
  (Temperature, RH, precipitation).
• Sites maybe influenced by two source regions
  during one sampling period.

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