July 26, 2007
Clearing up
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It's been a clear day in Baltimore today. One could see the high rise buildings in down town Baltimore clearly from a distance. This hourly PM 2.5 concentrations are in the range of 2.7 and 22.5 µg/m³ (recorded at Oldtown) and with around 15 µg/m³ for the earlier and later parts of the day. Temperatures were in the upper 70s (around 25 centigrade). The boundary layer was inhomogeneous and rose from 1.5 to 2 km from this morning to this afternoon.
Posted by Paul Schou at July 26, 2007 11:22 PM