August 31, 2007
Partly cloudy day with cold front passing
It was partly cloudy today with haze in the morning, then becoming clear in the late afternoon after 18:21(UTC). This change may has been caused by the passing of a cold front and an increase in pressure. The hourly PM 2.5 concentrations in the range of 7.4 to 35.2 ug/m3 were recorded at Maryland's Department of the Environment Oldtown site in Baltimore during ELF's operation, and it also showed a decrease of the PM2.5 from 18:21(UTC). The aerosol optical depth was ~0.5 in the afternoon from AERONET site, MD science center.
*The air conditioner in the lab was working fine today so the temperature was back to normal.