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| Titel |
Description of the long-term ozone data series obtained from different instrumental techniques at a single location: the Observatoire de Haute-Provence (43.9°N, 5.7°E) |
| VerfasserIn |
M. Guirlet, P. Keckhut, S. Godin, G. Mégie |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 18, no. 10 ; Nr. 18, no. 10, S.1325-1339 |
| Datensatznummer |
250014082
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| Publikation (Nr.) |
 copernicus.org/angeo-18-1325-2000.pdf |
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| Zusammenfassung |
A description of the long-term data series of
stratospheric ozone at the Observatoire de Haute-Provence is presented. At this
station, data sets with temporal length of a decade or more are provided in the
framework of the Network for Detection of Stratospheric Change by ground-based
experiments: Dobson spectrophotometer (in both column and Umkehr mode), lidar
and ozonesondes. The data time series obtained from these various instruments
operated simultaneously at a single site and complemented by SAGE II space-borne
measurements are first described with respect to instrumental uncertainties,
sampling rate and time evolution. These data series are then compared to each
other in terms of sampling rate and average vertical profiles. The difference
between the mean ozone profiles of the data sets can partly be explained by the
different sampling rate of the instruments. Using the overlap and the
complementarity of the various data sets, a preliminary estimate of the
long-term evolution of ozone over the last decade over Southern France is
conducted. Trend values for both total column and vertical profiles are derived
using the multi-regression statistical model AMOUNTS O3. In the 25–40
km altitude range, a similar ozone decrease from –4% to –10% is
observed from lidar, Umkehr and SAGE II data series in good agreement with
previous estimates. In the lower stratosphere (15–25 km), large negative trends
in the ozone vertical profile are observed. In addition, the negative trend of
–5.4% in total ozone inferred from the Dobson measurements over the period
1983–1995 is in good agreement with the integrated trend profile.
Key words: Atmospheric composition and structure
(evolution of the atmosphere; middle atmosphere – composition and chemistry;
instruments and techniques) |
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