Arctic polar stratospheric cloud observations by airborne lidar

Details Arctic polar stratospheric cloud observations by airborne lidar Arctic polar stratospheric cloud observations by airborne lidar

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17..381m&link_type=abstract

Geophysical Research Letters, Supplement (ISSN 0094-8276), vol. 17, March 1990, p. 381-383.

Physics

26

Airborne Equipment, Arctic Regions, Ice Clouds, Optical Radar, Polar Meteorology, Stratosphere, Adiabatic Conditions, Atmospheric Temperature, Nitric Acid, Ozone Depletion, Research Aircraft

Scientific paper

Lidar observations obtained from January 24 to February 2, 1989, during the Airborne Arctic Stratospheric expedition (AASE) mission further support the existence of two distinct classes (Types 1 and 2) of polar stratospheric clouds (PSCs). Most of the Type 1 PSCs observed were formed by rapid adiabatic cooling and exhibited very low depolarization ratios and low-to-intermediate scattering ratios. Type 2 PSCs were observed in regions of lowest temperature and showed much larger depolarization and scattering ratios, as would be expected from larger ice crystals. PSCs with low scattering ratios but moderate depolarization ratios were observed near the center of the vortex on one flight. These may have been either sparse Type 2 PSCs or Type 1 PSCs formed by less rapid cooling.

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