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Differential SO 2 column measurements of the Mt. Pinatubo volcanic plume
Author(s) -
Hoff Raymond M.
Publication year - 1992
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/91gl02793
Subject(s) - volcano , plume , atmospheric sciences , column (typography) , volcanic gases , panache , aerosol , sulfate aerosol , geology , environmental science , volcanic ash , differential optical absorption spectroscopy , meteorology , absorption (acoustics) , stratosphere , seismology , physics , optics , structural engineering , connection (principal bundle) , engineering
Differential SO 2 column measurements of the Mt. Pinatubo volcanic plume were made from a NASA Electra aircraft flying in the Caribbean in July, 1991. The mean column content of the volcanic plume in the Caribbean was 25 μatm m (2.5 Dobson units) with periods of over 100 μatm m observed. The data indicate that an aerosol absorption or scattering effect occurs for long slant paths (low sun elevation angles) and 41 μatm m (an average obtained for 1–2 airmasses) may be more representative of a true column average. Dispersion of the initial cloud from Mt. Pinatubo and a one month SO 2 to sulfate conversion time constant are in good agreement with the column contents found here.