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| Titel |
Sunset–sunrise difference in solar occultation ozone measurements (SAGE II, HALOE, and ACE–FTS) and its relationship to tidal vertical winds |
| VerfasserIn |
T. Sakazaki, M. Shiotani, M. Suzuki, D. Kinnison, J. M. Zawodny, M. McHugh, K. A. Walker |
| 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 ; 15, no. 2 ; Nr. 15, no. 2 (2015-01-23), S.829-843 |
| Datensatznummer |
250119342
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| Publikation (Nr.) |
 copernicus.org/acp-15-829-2015.pdf |
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| Zusammenfassung |
| This paper contains a comprehensive investigation of the sunset–sunrise
difference (SSD, i.e., the sunset-minus-sunrise value) of the ozone mixing
ratio in the latitude range of 10° S–10° N. SSD values
were determined from solar occultation measurements based on data obtained
from the Stratospheric Aerosol and Gas Experiment (SAGE) II, the Halogen
Occultation Experiment (HALOE), and the Atmospheric Chemistry Experiment–Fourier transform spectrometer (ACE–FTS). The SSD was negative at altitudes
of 20–30 km (−0.1 ppmv at 25 km) and positive at 30–50 km (+0.2 ppmv at
40–45 km) for HALOE and ACE–FTS data. SAGE II data also showed a
qualitatively similar result, although the SSD in the upper stratosphere was
2 times larger than those derived from the other data sets. On the basis of
an analysis of data from the Superconducting Submillimeter-Wave Limb-Emission
Sounder (SMILES) and a nudged chemical transport model (the specified
dynamics version of the Whole Atmosphere Community Climate Model:
SD–WACCM), we conclude that the SSD can be explained by diurnal variations
in the ozone concentration, particularly those caused by vertical transport
by the atmospheric tidal winds. All data sets showed significant seasonal
variations in the SSD; the SSD in the upper stratosphere is greatest from
December through February, while that in the lower stratosphere reaches a
maximum twice: during the periods March–April and September–October. Based
on an analysis of SD–WACCM results, we found that these seasonal variations
follow those associated with the tidal vertical winds. |
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