Tropical cirrus clouds: A possible sink for ozone

Details Tropical cirrus clouds: A possible sink for ozone Tropical cirrus clouds: A possible sink for ozone

Aug 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000georl..27.2233r&link_type=abstract

Geophysical Research Letters, Volume 27, Issue 15, p. 2233-2236

Physics

10

Atmospheric Composition And Structure: Aerosols And Particles, Atmospheric Composition And Structure: Cloud Physics And Chemistry, Atmospheric Composition And Structure: Troposphere-Composition And Chemistry, Meteorology And Atmospheric Dynamics: Tropical Meteorology

Scientific paper

Using 7 years of ozone, humidity and temperature radiosoundings performed every two-weeks at Reunion Island (21°S, 55°E), a systematic diminution of ozone mixing ratio at level of tropical cirrus clouds is evidenced. The average depletion of ozone concentration, as compared to adjacent levels, is above 25%. This effect is further documented using concomitant Lidar and radiosounding data. Ice cloud particles evidenced from polarization and backscattering Lidar data are observed at the same level than the ozone depletion in a detailed case study. The ozone concentration is 30% weaker at this level than outside the cirrus cloud. Backtrajectory analyses further indicate that the advection of O3-poor layer injected from lower levels is not likely.

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