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Science 27 August 1993:
Vol. 261. no. 5125, pp. 1140 - 1143
DOI: 10.1126/science.261.5125.1140
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Articles

In Situ Observations of Aerosol and Chlorine Monoxide After the 1991 Eruption of Mount Pinatubo: Effect of Reactions on Sulfate Aerosol

J. C. Wilson 1, H. H. Jonsson 1, C. A. Brock 1, D. W. Toohey 2, L. M. Avallone 3, D. Baumgardner 4, J. E. Dye 4, L. R. Poole 5, D. C. Woods 5, R. J. DeCoursey 6, M. Osborn 6, M. C. Pitts 6, K. K. Kelly 7, K. R. Chan 8, G. V. Ferry 8, M. Loewenstein 8, J. R. Podolske 8, and A. Weaver 8

1 Department of Engineering, University of Denver, Denver, CO 80208
2 Department of Geosciences, University of California, Irvine, CA 92717
3 Department of Chemistry, Harvard University, Cambridge, MA 02138
4 National Center for Atmospheric Research, Box 3000, Boulder, CO 80307
5 National Aeronautics and Space Administration, Langley Research Center, Hampton, VA 23681
6 Science Applications International Corporation, Hampton, VA 23666
7 National Oceanic and Atmospheric Administration, Aeronomy Lab, 325 Broadway, Boulder, CO 80303
8 National Aeronautics and Space Administration, Ames Research Center, Moffett Field, CA 94035

Highly resolved aerosol size distributions measured from high-altitude aircraft can be used to describe the effect of the 1991 eruption of Mount Pinatubo on the stratospheric aerosol. In some air masses, aerosol mass mixing ratios increased by factors exceeding 100 and aerosol surface area concentrations increased by factors of 30 or more. Increases in aerosol surface area concentration were accompanied by increases in chlorine monoxide at mid-latitudes when confounding factors were controlled. This observation supports the assertion that reactions occurring on the aerosol can increase the fraction of stratospheric chlorine that occurs in ozone-destroying forms.

Submitted on March 1, 1993
Accepted on June 17, 1993


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Probing Stratospheric Ozone.
J. M. Rodriguez (1993)
Science 261, 1128-1129
   PDF »
Chemical Loss of Ozone in the Arctic Polar Vortex in the Winter of 1991-1992.
R. J. Salawitch, S. C. Wofsy, E. W. Gottlieb, L. R. Lait, P. A. Newman, M. R. Schoeberl, M. Loewenstein, J. R. Podolske, S. E. Strahan, M. H. Proffitt, et al. (1993)
Science 261, 1146-1149
   Abstract »    PDF »


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Science. ISSN 0036-8075 (print), 1095-9203 (online)