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| Titel |
Ozone trends derived from the total column and vertical profiles at a northern mid-latitude station |
| VerfasserIn |
P. J. Nair, S. Godin-Beekmann, J. Kuttippurath, G. Ancellet, F. Goutail, A. Pazmino, L. Froidevaux, J. M. Zawodny, R. D. Evans, H. J. Wang, J. Anderson, M. Pastel |
| 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 ; 13, no. 20 ; Nr. 13, no. 20 (2013-10-24), S.10373-10384 |
| Datensatznummer |
250085767
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| Publikation (Nr.) |
 copernicus.org/acp-13-10373-2013.pdf |
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| Zusammenfassung |
| The trends and variability of ozone are assessed over a northern
mid-latitude station, Haute-Provence Observatory
(OHP: 43.93° N, 5.71° E), using total column ozone
observations from the Dobson and Système d'Analyse par Observation
Zénithale spectrometers, and stratospheric ozone profile
measurements from light detection and ranging (lidar), ozonesondes,
Stratospheric Aerosol and Gas Experiment (SAGE) II, Halogen Occultation
Experiment (HALOE) and Aura Microwave Limb Sounder (MLS). A multivariate regression
model with quasi-biennial oscillation (QBO), solar flux, aerosol
optical thickness, heat flux, North Atlantic Oscillation (NAO) and a
piecewise linear trend (PWLT) or equivalent effective stratospheric
chlorine (EESC) functions is applied to the ozone anomalies. The
maximum variability of ozone in winter/spring is explained by QBO and
heat flux in the ranges 15–45 km and 15–24 km,
respectively. The NAO shows maximum influence in the lower
stratosphere during winter, while the solar flux influence is largest
in the lower and middle stratosphere in summer. The total column ozone
trends estimated from the PWLT and EESC functions are of
−1.47 ± 0.27 and −1.40 ± 0.25 DU yr−1, respectively,
over the period 1984–1996 and about 0.55 ± 0.30 and
0.42 ± 0.08 DU yr−1, respectively, over the period 1997–2010. The
ozone profiles yield similar and significant EESC-based and PWLT trends for 1984–1996, and are about −0.5 and
−0.8% yr−1 in the lower and upper stratosphere,
respectively. For 1997–2010, the EESC-based and PWLT estimates are of the order of 0.3 and 0.1% yr−1,
respectively, in the 18–28 km range, and at 40–45 km,
EESC provides significant ozone trends larger than the insignificant
PWLT results. Furthermore, very similar vertical trends for the
respective time periods are also deduced from another long-term
satellite-based data set (GOZCARDS–Global OZone Chemistry And Related
trace gas Data records for the Stratosphere) sampled at northern
mid-latitudes. Therefore, this analysis unveils ozone recovery signals
from total column ozone and profile measurements at OHP, and hence in
the northern mid-latitudes. |
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