Physics
Scientific paper
Apr 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982georl...9..469r&link_type=abstract
Geophysical Research Letters, vol. 9, Apr. 1982, p. 469-472.
Physics
7
Aerosols, Optical Radar, Stratosphere, Volcanoes, Backscattering, Europe, Transport Properties
Scientific paper
Lidar observations of variations in the aerosol layer due to the eruptions of Mt. St. Helens and the volcano Alaid in the Kurile Islands are reported and compared. One year after the Mt. St. Helens activity the backscattering coefficient had reduced to within 10% of the values observed in the pre-eruption period. Observed peaks were found to be moving upward, eventually forming a broad aerosol layer at 15-17 km height in July, 1981. The Alaid plume moved west to east and was determined to be the cause of aerosol disturbances up to the 20 km level. Data is presented of the time variation of the aerosol quantities and the time variation of the space resolved integral backscattering. Additional data has shown that both the Mt. St. Helens and the Alaid eruptions caused only one-third the aerosol perturbations as the Fuego eruption of 1974.
Carnuth Walter
Funk W.
Jaeger Heinrich
Reiter Ralf
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