0000000000177736
AUTHOR
J. Heintzenberg
Cloud phase identification of low-level Arctic clouds from airborne spectral radiation measurements: test of three approaches
Abstract. Boundary layer clouds were investigated with a complementary set of remote sensing and in situ instruments during the Arctic Study of Tropospheric Aerosol, Clouds and Radiation (ASTAR) campaign in March and April 2007. The clouds that formed in a cold air outbreak over the open Greenland sea showed a variety in their thermodynamic state. Beside the predominant mixed-phase clouds pure liquid and ice clouds were observed. Utilizing the measurements of solar radiation reflected by the clouds three methods to retrieve the thermodynamic phase of the cloud were defined and compared. Two ice indices IS and IP were obtained by analyzing the spectral pattern of the cloud top reflectance in…
NATO ARW on Clouds — Session Summaries
The two papers presented in this session focused on the role of dynamics in the water vapor distribution of the tropics and its implications to climate.