Microphysical and radiative properties of the ISDAC 26 April mixed-phase case
Authors
Paul Lawson — SPEC, Inc.
David L. Mitchell — Desert Research Institute
Eric Jensen — NASA - Ames Research Center
Category
Aerosol-Cloud-Radiation Interactions
Description
In situ microphysical data collected by the Canadian Convair 580 are analyzed in detail. The Convair executed a sawtooth pattern through a shallow (300-meter thick) single-layer mixed-phase cloud, climbing and descending five times from below cloud base to above cloud top. Measurements from a Fast FSSP, 2D-S, HVPS, and CPI are used to separate particles into water drop and ice particle size distributions. CPI images are analyzed to size-sort water drops from ice particles. CPI image sorting is combined with fast FSSP, 2D-S, and HVPS measurements to produce quantitative ice and water drop size distributions. CPI and 2D-S images are used to determine ice particle habit. Optical properties of water drop and ice size distributions are computed and fed into a radiative transfer model to determine cloud heating rates. The cloud heating rates using actual measurements are compared with results from a numerical model using typical parameterizations.
