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| Titel |
Comparison of H2O2 model results with different reaction rates to MIPAS observations |
| VerfasserIn |
Stefan Versick, Thomas Reddmann, Gabriele Stiller, Thomas von Clarmann |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250053725
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| Zusammenfassung |
| H, OH and HO2 (collectively called HOx) are fast-reacting radicals in the middle
atmosphere. These radicals are efficient catalysts for destroying ozone and play an important
role in atmospheric chemistry. An important reservoir gas for HOx is Hydrogen Peroxide
(H2O2). The main reactions for H2O2 are:
HO2 + HO2 - H2O2 + O2,
OH + H2O2 - H2O + HO2,
H2O2 + hν - OH + OH.
Many of the corresponding reaction rates have high uncertainties. We performed model
simulations with our CTM KASIMA with different sets of reaction rates for the main
reactions. Mixing ratios from these simulations are compared to H2O2 observations of the
Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) for standard
conditions and during the Solar Proton Event in Oct./Nov. 2003. The KASIMA model
overestimates H2O2 concentration using the standard set of reaction rates, but can
qualitatively reproduce H2O2 enhancements as observed after the SPE event. We further take
a look at the differences in H2O2 mixing ratios in this time period using the different reaction
rates. |
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