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In-situ measurements of changes in stratospheric aerosol and the N2O-aerosol relationship inside and outside of the polar vortexTwo optical particle counters on the ER-2, together covering a particle size diameter range from 0.1 microns to 23 microns, were used to measure the aerosol bulk quantities integral number, aerosol surface and volume, as well as detailed size distributions inside and outside of the polar vortex in the lower stratosphere. While AAES I (Arctic Airborne Stratospheric Expedition, (Dec. 88 - Feb. 89) was conducted in a period of relative volcanic quiescence, enhancements in aerosol number, surface and volume of factors around 10, 25 and 100 were observed during AASE 2 (Aug. 91 - Mar. 92) due to the eruption of Mt. Pinatubo. The changes in these bulk quantities as well as in the size distributions measured both outside and inside the polar vortex are presented and compared with those obtained in polar stratospheric cloud events (AASE I). Except for a shift towards larger aerosol mixing ratios the general shape of correlograms between the measured N2O and particle mixing ratios remain similar before and after the eruption. Similar correlograms are used to interpret data from vertical profiles inside and outside of the polar vortex.
Document ID
19950044328
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Borrmann, S.
(National Center for Atmospheric Research, Boulder, CO United States)
Dye, J. E.
(National Center for Atmospheric Research, Boulder, CO United States)
Baumgardner, D.
(National Center for Atmospheric Research, Boulder, CO United States)
Wilson, J. C.
(Univ. of Denver, Denver, CO United States)
Jonsson, H. H.
(Univ. of Denver, Denver, CO United States)
Brock, C. A.
(Univ. of Denver, Denver, CO United States)
Loewenstein, M.
(NASA Ames Research Center Moffett Field, CA, United States)
Podolske, J. R.
(NASA Ames Research Center Moffett Field, CA, United States)
Ferry, G. V.
(NASA Ames Research Center Moffett Field, CA, United States)
Barr, K. S.
(National Center for Atmospheric Research, Boulder, CO United States)
Date Acquired
August 16, 2013
Publication Date
November 19, 1993
Publication Information
Publication: Geophysical Research Letters
Volume: 20
Issue: 22
ISSN: 0094-8276
Subject Category
Environment Pollution
Accession Number
95A75927
Distribution Limits
Public
Copyright
Other

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