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Lidar Measurements Of Mount St. Helens Effluents
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Lidar Measurements Of Mount St. Helens Effluents
Lidar Measurements Of Mount St. Helens Effluents
MM
M.Patrick McCormick
M.Patrick McCormick
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6 November 1981
proceedings article
Published by
SPIE-Intl Soc Optical Eng
Vol. 278
,
19-22
https://doi.org/10.1117/12.931921
Abstract
Lidar measurements of the worldwide movement of stratospheric aerosols produced by the 18 May 1930 eruption of Mount St. Helens are described. Ground-based and airborne measurements show that the layers below 20 km produced by this eruption moved in an easterly direction while those above 20 km moved in a westerly direction. The effluent at jet stream altitudes of 10-12 km circled the globe in about 16 days, and the effluent at 23 km (the highest altitude recorded) circled the globe in about 56 days. Mass calcu-lations, using backscatter-to-mass conversion models, indicate that approximately 0.5 x 106 metric tons of new stratospheric material was produced by this eruption. Even though this represents a 2008 increase in Northern Hemispheric aerosol, no significant long-term atmospheric temperature change should occur.© (1981) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Keywords
LIDAR
BACKSCATTER
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