High-resolution photoabsorption cross-section measurements of SO2 at 160 K between 199 and 220 nm

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Photoabsorption cross sections of sulfur dioxide over a range of temperatures are required to interpret observations and to support models of the atmospheres of Io and Venus. We report high-resolution (lambda/Delta lambda approximate to 450,000) photoabsorption cross-section measurements by Fourier transform spectrometry of SO2 at 160 K in the wavelength region 199 to 220 nm, which encompasses the strongest features in the prominent (C) over tilde (1) B-2 -(X) over tilde (1)A(1) system. Our results are compared with literature values obtained at lower resolutions and with 295 K cross sections recorded earlier with the same instrument.


  • J. Rufus
  • G. Stark
  • A. P. Thorne
  • J. C. Pickering
  • Richard Blackwell-Whitehead
  • D. Blackie
  • Peter L. Smith
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Astronomy, Astrophysics and Cosmology
Original languageEnglish
Pages (from-to)E06003
JournalJournal of Geophysical Research
Issue numberE6
Publication statusPublished - 2009
Publication categoryResearch