Preliminary laboratory studies of the optical scattering properties of the crystal clouds

C. Saunders, J. Rimmer, P. Jonas, J. Arathoon, C. Liu
1998 Annales Geophysicae  
Ice crystal clouds have an in¯uence on the radiative budget of the earth; however, the exact size and nature of this in¯uence has yet to be determined. A laboratory cloud chamber experiment has been set up to provide data on the optical scattering behaviour of ice crystals at a visible wavelength in order to gain information which can be used in climate models concerning the radiative characteristics of cirrus clouds. A PMS grey-scale probe is used to monitor simultaneously the cloud
more » ... he cloud microphysical properties in order to correlate these closely with the observed radiative properties. Preliminary results show that ice crystals scatter considerably more at 90°than do water droplets, and that the halo eects are visible in a laboratorygenerated cloud when the ice crystal concentration is suciently small to prevent masking from multiple scattering.
doi:10.1007/s005850050632 fatcat:skxbkcodtzfonbzrtkhldl3gc4