October 16, 2007
hazy day
It was hazy today with high clouds at ~10km. The hourly PM 2.5 concentrations in the range of 19.5 to 27.2 ug/m3 were recorded at the Oldtown site during ELF’s operation. The aerosol optical depth was ~0.68 from the AERONET site, MD Science Center. The aloft layer located at ~2km at ~17:00UTC was from the south west of UMBC.
