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Titel |
Modelling vibrationally excited hydroxyl in electric discharges in the mesosphere |
VerfasserIn |
Holger Winkler, Justus Notholt |
Konferenz |
EGU General Assembly 2015
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Medientyp |
Artikel
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Sprache |
Englisch
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Digitales Dokument |
PDF |
Erschienen |
In: GRA - Volume 17 (2015) |
Datensatznummer |
250106708
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Publikation (Nr.) |
EGU/EGU2015-6386.pdf |
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Zusammenfassung |
There is a number of model simulations on the chemical processes in mesospheric
discharges (sprites), and the corresponding emissions from excited species. However,
there are only a few investigations on the effects of sprites on vibrationally excited
hydroxyl molecules OH*. A numerical plasma chemistry model has been used to
simulate the response of OH* to an electric breakdown pulse in the mesosphere. The
model accounts for the first 9 vibrational states of OH*, chemical production and
loss processes including quenching as well as radiative de-excitation. Preliminary
results indicate that there is an increased production of OH* through reaction O3 +
H / OH* + O2 as both H and O3 increase due to the breakdown pulse. This is
counteracted by an increase of atomic oxygen which removes OH* by quenching. |
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