July 2, 2007
Very clear day
It is very clear today. There are high clouds at ~10km in the morning with low clouds at~17:00UTC. There are aloft layers at ~3km and 3.5km, which are from the northwest of UMBC from HYSPLIT. The aerosol optical depth is around 0.1 from AERONET, MD science center. The hourly PM 2.5 concentrations in the range of 4.6 (14:00, July 2nd, 2007, UTC) to12.2 ug/m3(16:00, July 2nd, 2007, UTC) were recorded at Maryland's Department of the Environment Oldtown site in Baltimore during ELF's operation.
