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Proceedings Paper

Lidar Measurements Of Mount St. Helens Effluents
Author(s): M.Patrick McCormick
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Paper 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.

Paper Details

Date Published: 6 November 1981
PDF: 4 pages
Proc. SPIE 0278, Electro-Optical Instrumentation for Resources Evaluation, (6 November 1981);
Show Author Affiliations
M.Patrick McCormick, National Aeronautics and Space Administration (United States)

Published in SPIE Proceedings Vol. 0278:
Electro-Optical Instrumentation for Resources Evaluation
Frederick J. Doyle, Editor(s)

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