Modelling of composition changes during F-region storms: a reassessment

T. J. Fuller-Rowell, D. Rees, H. Rishbeth, A. G. Burns, T. L. Killeen, R. G. Roble

Research output: Contribution to journalArticlepeer-review


A recalculation of the global changes of thermospheric gas composition, resulting from strong heat inputs in the auroral ovals, shows that (contrary to some previous suggestions) widespread increases of mean molecular mass are produced at mid-latitudes, in summer and at equinox. Decreases of mean molecular mass occur at mid-latitudes in winter. Similar results are given by both the 'UCL' and 'NCAR TIGCM' three-dimensional models. The computed composition changes now seem consistent with the local time and seasonal response observed by satellites, and can broadly account for 'negative storm effects' in the ionospheric F2-layer at mid-latitudes.

Original languageEnglish (US)
Pages (from-to)541-550
Number of pages10
JournalJournal of Atmospheric and Terrestrial Physics
Issue number6-7
StatePublished - 1991
Externally publishedYes

ASJC Scopus subject areas

  • General Environmental Science
  • Geophysics
  • General Engineering
  • Atmospheric Science
  • General Earth and Planetary Sciences


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