Stratospheric in situ measurements of H2SO4 and HSO3 vapors during a volcanically active period |
| |
Authors: | S Qiu F Arnold |
| |
Institution: | Max-Planck-Institut für Kernphysik, Postfach 103980, 6900 Heidelberg, Germany |
| |
Abstract: | In situ measurements of stratospheric H2SO4 and HSO3vapors 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 around 40 km. From the measurements it is concluded that H2SO4 and probably HSO3photolysis have an important influence above 34 km leading to the observed increase of HSO3] and a depletion of H2SO4vapor.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 H2SO4vapor. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|