U.S. Air Quality

Clear day

It was clear today. The hourly PM 2.5 concentrations in the range of 5.2 to 11.9 ug/m3 were recorded at the Oldtown site during ELF’s operation. The aerosol optical depth was ~0.1 in the morning, then increased to ~0.2 in the afternoon from the AERONET site, MD Science Center. There were high clouds at ~11km during ELF’s running and lower clouds at ~6km from 21:00(UTC) to 23:00(UTC), (not shown in the image).