July 20, 2007
Cloudy with a Patch of Rain
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Cloudy with temperatures in the upper 70s (about 26 centigrade) the humidity has been increasing to a light shower just after 1:00 UTC. During these runs the boundary layer decreased from 1.5 to 1km. Hourly PM 2.5 concentrations in the range of 19.5 to 24.9 ug/m3 [AQI Levels: 63-66 (Moderate)] were recorded at Maryland's Department of the Enviroment Oldtown site in Baltimore during ELF's operation. With the additional extinction plots (shown below) one can see that rain may have been the cause of some aerosol scavenging.
Posted by Paul Schou at July 20, 2007 10:25 AM