September 24, 2007
Clear skies and layer aloft
Clear skies prevailed during today's observations. A rising boundary layer (15-17:00 UTC)can be observed, reaching up to 1 km. A layer aloft was observed between 2.4-3 km throughout today's timeseries. The colorbar scale was reduced by a factor of 5, compared to the last lidar post, in order to clearly observe today's boundary layer. Hourly AQI PM 2.5 levels ranged between 33-37 at Maryland's Department of the Enviroment Oldtown site in Baltimore during ELF's operation.