Lidar Measurements Of Mount St. Helens Effluents

M.Patrick McCormick

doi:10.1117/12.931921

6 November 1981 Lidar Measurements Of Mount St. Helens Effluents

M.Patrick McCormick

Proceedings Volume 0278, Electro-Optical Instrumentation for Resources Evaluation; (1981) https://doi.org/10.1117/12.931921
Event: 1981 Technical Symposium East, 1981, Washington, D.C., United States

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.

Citation Download Citation

M.Patrick McCormick "Lidar Measurements Of Mount St. Helens Effluents", Proc. SPIE 0278, Electro-Optical Instrumentation for Resources Evaluation, (6 November 1981); https://doi.org/10.1117/12.931921

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