A study of clouds in the high Arctic summer using ground-based measurements and satellite observations
Some major research questions are: Can the satellite instrument see the optically thin clouds observed during ASCOS? In that case, how frequent are these clouds? Can the satellite observations tell us more about the cloud phase and the vertical and horizontal structure of the clouds? How do the clouds influence the radiative balance? How can they persist for so long?
Satellite data from CloudSat/CALIPSO are normally a useful complement to MODIS data. However, CloudSat/CALIPSO data are only available south of 82°N and ASCOS traveled up to 87°N. Nevertheless, we also utilize CloudSat/CALIPSO data further south over the North Atlantic Ocean for a statistical comparison with MODIS and ASCOS regarding the frequency and characteristics of Arctic mixed-phase clouds.