Evolution of stratospheric aerosols in the post-Pinatubo period measured by solar occultation

This paper presents particle size distributions of stratospheric aerosols derived from solar occultation data measured by the instrument ORA (an acronym for Occultation RAdiometer) during the period August 1992–May 1993. Starting from the UV-visible wavelength dependence of extinction coefficient pr...

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Bibliographic Details
Published inAtmospheric environment (1994) Vol. 35; no. 30; pp. 5067 - 5078
Main Authors Fussen, Didier, Vanhellemont, Filip, Bingen, Christine
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.10.2001
Subjects
Aerosols
Pinatubo
Stratosphere
Philippines, Luzon I., Pinatubo Mt
Pinatubo
Aerosols
Stratosphere
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Summary:This paper presents particle size distributions of stratospheric aerosols derived from solar occultation data measured by the instrument ORA (an acronym for Occultation RAdiometer) during the period August 1992–May 1993. Starting from the UV-visible wavelength dependence of extinction coefficient profiles, an algorithm is developed that allows to retrieve the three parameters of an equivalent log-normal distribution and that makes use of vertical regularization. Comparison of retrieved mode radius and particle number density with existing data is found to be satisfactory. The evolution of the stratospheric aerosols is clearly influenced by sedimentation and coagulation as expected but also by vertical circulation. In a simple 1-D model, we derive the vertical wind profile and we interpret the temporal evolution of the particle mode radius.
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ISSN:1352-2310
1873-2844
DOI:10.1016/S1352-2310(01)00325-9