One-year observations of Mount-Pinatubo aerosol with an advanced Raman lidar over Germany at 53.5 deg N

Details One-year observations of Mount-Pinatubo aerosol with an advanced Raman lidar over Germany at 53.5 deg N One-year observations of Mount-Pinatubo aerosol with an advanced Raman lidar over Germany at 53.5 deg N

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20..711a&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 8, p. 711-714.

Other

23

Aerosols, Optical Radar, Particle Size Distribution, Troposphere, Volcanoes, Backscattering, Extinction, Mass Distribution, Mie Scattering

Scientific paper

Combined Raman elastic-backscatter lidar observations of the development of stratospheric perturbation after eruptions of Mt. Pinatubo in June 1991 yielded height profiles of the particle extinction and backscatter coefficients simultaneously and independently of each other. From these data, the area-weighted mean particle radius and the aerosol surface area and mass are determined. The lidar measurements were taken at Geesthacht in northern Germany. The Pinatubo aerosol layer is located between the tropopause and about 24 km. The ratio of optical depth to column-integrated backscatter varied over 15-60 sr; most values were found at 20-30 sr. Extinction-to-backscatter ratios above 50, between 20 and 30, and below 15 sr, indicate effective particle radii lower than 0.2, between 0.2 and 0.75, and over 0.75 microns, respectively. Variations of the extinction to backscatter ratio with height between about 10 and 90 sr were observed. Column aerosol mass and surface area were of the order of 0.05 g/sq m and 2.5 x 10 exp 11 sq microns/sq m in the first half of 1992.

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