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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 micrometers to 23 micrometers, 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 AASE I (Arctic Airborne Stratospheric Expedition, (Dec. 1988 - Feb. 1989) 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 II (Aug. 1991 - Mar. 1992) 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 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
19970028657
Acquisition Source
Ames Research Center
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.
(Denver Univ. Boulder, CO United States)
Jonsson, H. H.
(Denver Univ. Boulder, CO United States)
Brock, C. A.
(Denver Univ. Boulder, 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 17, 2013
Publication Date
November 19, 1993
Publication Information
Publication: Airborne Arctic Stratospheric Expedition 2 Air Parcel Trajectories
Publisher: American Geophysical Union
Volume: 20
Issue: 22
ISSN: 0094-8534
Subject Category
Environment Pollution
Accession Number
97N72318
Distribution Limits
Public
Copyright
Public Use Permitted.
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