October 18, 2007
hazy and humid
It was hazy, humid and cloudy today. The attunated backscattering showed the high clouds at ~10km all day. The hourly PM 2.5 concentrations in the range of 15.6 to 21.5 ug/m3 were recorded at the Oldtown site during ELF’s operation. The aloft layer located at ~1.8km at ~14:00UTC was from the south west of UMBC.
