Modelling of composition changes during F-region storms - A reassessment

Details Modelling of composition changes during F-region storms - A reassessment Modelling of composition changes during F-region storms - A reassessment

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jatp...53..541f&link_type=abstract

(Thermospheric and ionospheric dynamics; Symposium, Exeter, England, July 1989, Selected Papers. A92-10626 01-46) Journal of Atm

Physics

29

Atmospheric Composition, F 2 Region, Ionospheric Electron Density, Magnetic Storms, Thermosphere, Annual Variations, Auroras, Midlatitude Atmosphere, Solar Terrestrial Interactions, Solstices, Three Dimensional Models

Scientific paper

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.

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