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| Titel |
Coherence of long-term stratospheric ozone vertical distribution time series used for the study of ozone recovery at a northern mid-latitude station |
| VerfasserIn |
P. J. Nair, S. Godin-Beekmann, A. Pazmino, A. Hauchecorne, G. Ancellet, I. Petropavlovskikh, L. E. Flynn, L. Froidevaux |
| 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 ; 11, no. 10 ; Nr. 11, no. 10 (2011-05-27), S.4957-4975 |
| Datensatznummer |
250009767
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| Publikation (Nr.) |
 copernicus.org/acp-11-4957-2011.pdf |
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| Zusammenfassung |
| The coherence of stratospheric ozone time series retrieved from various
observational records is investigated at Haute-Provence Observatory
(OHP–43.93° N, 5.71° E). The analysis is accomplished
through the intercomparison of collocated ozone measurements of Light
Detection and Ranging (lidar) with Solar Backscatter UltraViolet(/2)
(SBUV(/2)), Stratospheric Aerosol and Gas Experiment II (SAGE~II),
Halogen Occultation Experiment (HALOE), Microwave Limb Sounder (MLS)
on Upper Atmosphere Research Satellite (UARS) and Aura and Global
Ozone Monitoring by Occultation of Stars (GOMOS) satellite observations
as well as with in situ ozonesondes and ground-based Umkehr measurements
performed at OHP. A detailed statistical study of the relative differences
of ozone observations over the whole stratosphere is performed to detect
any specific drift in the data. On average, all instruments show their
best agreement with lidar at 20–40 km, where deviations are
within ±5 %. Discrepancies are somewhat higher below 20 and above
40 km. The agreement with SAGE II data is remarkable since average
differences are within ±1 % at 17–41 km. In contrast, Umkehr
data underestimate systematically the lidar measurements in the whole
stratosphere with a near zero bias at 16–8 hPa (~30 km).
Drifts are estimated using simple linear regression for the data sets
analysed in this study, from the monthly averaged difference time
series. The derived values are less than ±0.5 % yr−1 in
the 20–40 km altitude range and most drifts are not significant at
the 2σ level. We also discuss the possibilities of extending
the SAGE II and HALOE data with the GOMOS and Aura MLS data in
consideration with relative offsets and drifts since the combination
of such data sets are likely to be used for the study of stratospheric
ozone recovery in the future. |
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