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| Titel |
Daytime ozone and temperature variations in the mesosphere: a comparison between SABER observations and HAMMONIA model |
| VerfasserIn |
S. Dikty, H. Schmidt, M. Weber, C. Savigny, M. G. Mlynczak |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 10, no. 17 ; Nr. 10, no. 17 (2010-09-06), S.8331-8339 |
| Datensatznummer |
250008752
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| Publikation (Nr.) |
 copernicus.org/acp-10-8331-2010.pdf |
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| Zusammenfassung |
| This paper investigates the latest version 1.07 SABER (Sounding of the
Atmosphere using Broadband Emission Radiometry) tropical ozone from the
1.27 μm as well as from the 9.6 μm retrieval and temperature data with
respect to day time variations in the upper mesosphere. The processes
involved are compared to day time variations of the three-dimensional general
circulation and chemistry model HAMMONIA (Hamburg Model of the Neutral and
Ionized Atmosphere). The results show a good qualitative agreement for
ozone. The amplitude of daytime variations is in both cases approximately
60% of the daytime mean. During equinox the daytime maximum ozone
abundance is for both, the observations and the model, higher than during
solstice, especially above 0.01 hPa (approx. 80 km). The influence of tidal
signatures either directly in ozone or indirectly via a temperature response
above 0.01 hPa can not be fully eliminated. Below 0.01 hPa (photo-)chemistry
is the main driver for variations. We also use the HAMMONIA output of
daytime variation patterns of several other different trace gas species,
e.g., water vapor and atomic oxygen, to discuss the daytime pattern in
ozone. In contrast to ozone, temperature data show little daytime variations
between 65 and 90 km and their amplitudes are on the order of less than
1.5%. In addition, SABER and HAMMONIA temperatures show significant
differences above 80 km. |
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