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| Titel |
Comprehensive calculation of the energy per ion pair or W values for five major planetary upper atmospheres |
| VerfasserIn |
C. Simon Wedlund, G. Gronoff, J. Lilensten  , H. Ménager, M. Barthélémy |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 29, no. 1 ; Nr. 29, no. 1 (2011-01-24), S.187-195 |
| Datensatznummer |
250016958
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| Publikation (Nr.) |
 copernicus.org/angeo-29-187-2011.pdf |
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| Zusammenfassung |
| The mean energy W expended in a collision of electrons with atmospheric
gases is a useful parameter for fast aeronomy computations. Computing this
parameter in transport kinetic models with experimental values can tell us
more about the number of processes that have to be taken into account and the
uncertainties of the models. We present here computations for several
atmospheric gases of planetological interest (CO2, CO, N2, O2,
O, CH4, H, He) using a family of multi-stream kinetic transport codes.
Results for complete atmospheres for Venus, Earth, Mars, Jupiter and Titan
are also shown for the first time. A simple method is derived to calculate
W of gas mixtures from single-component gases and is conclusively checked
against the W values of these planetary atmospheres. Discrepancies between
experimental and theoretical values show where improvements can be made in
the measurement of excitation and dissociation cross-sections of specific
neutral species, such as CO2 and CO. |
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