The revised method for retrieving daytime distributions of atomic oxygen and odd‑hydrogens in the mesopause region: Importance of reaction H+O3→O2+OH
| Autor: | Grygalashvyly, Mykhaylo, Belikovich, Mikhail, Feigin, Alexander, Kulikov, Mikhail, Sonnemann, Gerd |
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| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Zdroj: | XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) |
| Popis: | Atomic oxygen in the mesopause region (70-100 km) is a critical species, governing the chemistry, airglow, and energy budget in that region. However, it cannot be measured directly by remote sensing techniques and so inference techniques, by airglow observations, are used. Such techniques are based on two assumptions, namely on photochemical ozone equilibrium and on processes entering into the ozone balance equation. This investigation devoted to the last one. By 3D modelling we find that the reaction of ozone with atomic hydrogen is an important loss processes for ozone under daytime conditions and should not be omitted from the ozone balance equation. Unfortunately, it is frequently ignored in satellite retrieval procedures. We take this reaction into account, developed a new retrieval procedure for atomic oxygen under daytime conditions, and illustrate its applicability by SABER (Sounding of the Atmosphere using Broadband Emission Radiometry) observations. Additionally, this procedure offers the possibility to obtain distributions of hydroxyl (OH), hydroperoxyl (HO2) and total exothermic chemical heat at daytime conditions in mesopause region. This work was partially funded by grant of the RSF № 22-12-00064, https://rscf.ru/project/22-12-00064/. The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) |
| Databáze: | OpenAIRE |
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