Gas composition of Popocatepetl Volcano between 2007 and 2008: FTIR spectroscopic measurements of an explosive event and during quiescent degassing
Por:
Stremme, W, Ortega, I, Siebe, C, Grutter, M
Publicada:
15 ene 2011
Resumen:
On December 1, 2007, the solar absorption infrared spectra of the Popocatepetl volcanic plume was recorded during an eruptive event and complementarily on November 17, 2008, the passive quiescent degassing was measured from the same site. A portable FTIR spectrometer with a scanning mirror for fast tracking of the sun provided the flexibility, quality, and simplicity needed for field deployment. Slant columns of the gases SO(2), HCl, HF, and SiF(4) were retrieved and strong differences could be observed when comparing gas ratios in both time periods. During the explosive eruption, the SO(2)/HCl ratio was three times greater and the HF/HCl ratio was slightly smaller than during passive degassing. While the ratios among SO(2), HCl, HF, and SiF(4) describe the chemical composition of the volcanic gas mixture, the SiF(4)/HF ratio provides information about the equilibrium temperatures of the stored gases which in this study were calculated at 150 degrees and 185 degrees C for the explosive
Filiaciones:
Stremme, W:
Univ Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, Mexico
Ortega, I:
Univ Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, Mexico
Siebe, C:
Univ Nacl Autonoma Mexico, Inst Geofis, Dept Vulcanol, Mexico City 04510, DF, Mexico
Grutter, M:
Univ Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, Mexico
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