11th Conference on Atmospheric Chemistry


Aerosols and associated precipitation patterns in Atlanta

Matthew C. Lacke, Jefferson County Department of Health, Birmingham, AL; and T. L. Mote and J. M. Shepherd

The role of aerosol concentrations on summer precipitation was examined in Atlanta, Georgia for the period 2003-04. Thursday had the highest average 2.5 ́m particulate matter (PM 2.5) concentrations at two of three Environmental Protection Agency stations. Monday and Thursday had the largest area of significantly different precipitation when compared to other days of the week. All but the southeast quadrant of the metropolitan area had a significant difference in precipitation on high versus low aerosol days. High aerosol days had greater instability (higher average convective available potential energy and lower convective inhibition), and a slightly more shallow mixing layer when compared to low aerosol days. Most of metropolitan Atlanta had higher precipitation amounts on high aerosol days and was significantly different from low aerosol days.

wrf recording  Recorded presentation

Session 9, Air quality and climate change—III
Thursday, 15 January 2009, 1:30 PM-3:00 PM, Room 127A

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