Ceilometer backscatter and cloud boundary heights

ASCOS was an interdisciplinary expedition to the central Arctic on the icebreaker Oden from 1 August to 9 September 2008. The expedition focused on processes related to cloud formation in the summer Arctic and included observations of marine biology and chemistry, atmospheric chemistry, physical oceanography, aerosol chemistry and physics, and meteorology. This ASCOS data set includes measurements from a ground-based, vertically-pointing, ceilometer system. Measurements include profiles of backscatter, the cloud base height for up to three cloud layers, and the vertical visibility.