Compositional evidence for Titan's stratospheric tilt

N.A. Teanby*, P.G.J. Irwin, R. de Kok

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

8 Citations (Scopus)

Abstract

Five years of Cassini CIRS infrared spectra have been used to determine the tilt of Titan's stratospheric symmetry axis with respect to the solid body rotation axis. Measurements of HCN abundance centred around 5 mbar (125 km altitude) at equatorial latitudes show the symmetry axis is tilted by 4.0 ± 1 . 5{ring operator} in a direction 70 ± 40{ring operator} W of the sub-solar point. This value is consistent with tilts determined from temperature and haze measurements by Achterberg et al. (2008a) and Roman et al. (2009). The consistency of results from three independent methods suggests that Titan's entire stratosphere is tilted and provides a powerful constraint on the underlying atmospheric dynamics.

Original languageEnglish
Pages (from-to)792-800
Number of pages9
JournalPlanetary and Space Science
Volume58
Issue number5
DOIs
Publication statusPublished - Apr 2010
Externally publishedYes

Keywords

  • Atmospheres
  • Composition
  • Dynamics
  • Titan

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