Physics
Scientific paper
Jan 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984p%26ss...32...87q&link_type=abstract
Planetary and Space Science, Volume 32, Issue 1, p. 87-95.
Physics
2
Scientific paper
In situ measurements of stratospheric H2SO4- and HSO3-vapors using passive chemical ionization mass spectrometry were made in October 1982 after the eruption of volcano El Chichon. Data were obtained between about 20 and 41 km showing [H2SO4 + HSO3] sum concentrations between about 104 and 2 × 105 cm-3 below 29 km and a steep rise above this altitude. Maximum [H2SO4 + HSO3] values of about 3 × 106 cm-3 are reached above 35 km.
Partial [HSO3] concentrations increase above 34 km reaching about 4 × 105 cm -3 around 40 km. From the measurements it is concluded that H2SO4- and probably HSO3-photolysis have an important influence above 34 km leading to the observed increase of [HSO3] and a depletion of H2SO4-vapor.
It also seems that the data support the view of heterogeneous HSO3 removal. If correct, this would imply that stratospheric aerosols are formed primarily from HSO3- rather than H2SO4-vapor.
Arnold Frank
Qiu Shuisheng
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