SAGE II observations of polar stratospheric clouds near 50 deg N January 31 - February 2, 1989

Details SAGE II observations of polar stratospheric clouds near 50 deg N January 31 - February 2, 1989 SAGE II observations of polar stratospheric clouds near 50 deg N January 31 - February 2, 1989

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17..405p&link_type=abstract

Geophysical Research Letters, Supplement (ISSN 0094-8276), vol. 17, March 1990, p. 405-408.

Mathematics

Logic

8

Atmospheric Composition, Atmospheric Temperature, Cloud Cover, Polar Meteorology, Stratosphere, Polar Regions, Sage Satellite, Satellite Observation, Winter

Scientific paper

Polar stratospheric clouds (PSCs) form at very cold temperatures which typically occur only at high latitudes during local winter. However, meteorological circumstances in the Arctic during late January 1989 led to PSC formation unusually far to the south, at latitudes (near 50 deg N) being sampled during the period by the orbiting SAGE II instrument. These unusual PSC sightings and the evolution of meteorological conditions which produced the episode are described. Profiles of SAGE II extinction measurements at 0.525 and 1.02 microns show clear signatures of PSCs and indicate that the cloud particles were considerably larger than the background aerosol. It is most important to note that the clouds were sighted at a latitude where there was extensive sunlight, thus increasing the likelihood of ozone loss both locally and downstream due to enhancements in reactive chlorine expected from heterogeneous chemical processing within the PSCs.

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