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Delayed production of sulfuric acid condensation nuclei in the polar stratosphere from El Chichon volcanic vaporsIt is pointed out that measurements of the vertical profiles of atmospheric condensation nuclei (CN) have been conducted since 1973. Studies with a new instrument revealed that the CN concentration undergoes a remarkable annual variation in the 30-km region characterized by a large increase in the late winter/early spring period with a subsequent decay during the remainder of the year. The event particles are observed to be volatile at 150 C, suggesting a sulfuric acid-water composition similar to that found in the normal 20 km aerosol layer. The development of about 10 to the 7th metric tons of sulfuric acid aerosol following the injection of sulfurous gases by El Chichon in April 1982, prompted Hofmann and Rosen (1983) to predict a very large CN event for 1983. The present investigation is concerned with the actual observation of the predicted event. Attention is given to the observation of a very large increase of what appear to be small sulfuric acid droplets at 30-km altitude in January 1983 over Laramie, WY, in January 1983.
Document ID
19850042465
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Hofmann, D. J.
(Wyoming Univ. Laramie, WY, United States)
Rosen, J. M.
(Wyoming, University Laramie, WY, United States)
Gringel, W.
(Tuebingen, Universitaet Tuebingen, Germany)
Date Acquired
August 12, 2013
Publication Date
February 20, 1985
Publication Information
Publication: Journal of Geophysical Research
Volume: 90
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
85A24616
Distribution Limits
Public
Copyright
Other

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