very clear day
It was very clear today. The hourly PM 2.5 concentrations in the range of 3.5 to 9.4 ug/m3 were recorded at the Oldtown site during ELF’s operation. The aerosol optical depth was ~0.05 from the AERONET site, MD Science Center.
Posted by li at October 12, 2007 10:12 PM