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| Titel |
Long-term response of stratospheric ozone and temperature to solar variability |
| VerfasserIn |
I. Bordi, F. Berrilli, E. Pietropaolo |
| 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 ; 33, no. 3 ; Nr. 33, no. 3 (2015-03-04), S.267-277 |
| Datensatznummer |
250121170
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| Publikation (Nr.) |
 copernicus.org/angeo-33-267-2015.pdf |
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| Zusammenfassung |
| The long-term variability in stratospheric ozone mass mixing ratio (O3)
and temperature (T) from 1979 to 2013 is investigated using the latest
reanalysis product delivered by the European Centre for Medium-Range Weather
Forecasts (ECMWF), i.e., ERA-Interim. Moreover, using the Mg II index time
series for the same time period, the response of the stratosphere to the
11-year Schwabe solar cycle is investigated. Results reveal the following
features: (i) upward (downward) trends characterize zonally averaged O3
anomalies in the upper (middle to lower stratosphere) stratosphere, while
prevailing downward trends affect the T field. Mg II index data exhibit a
weaker 24th solar cycle (though not complete) when compared with the previous
two; (ii) correlations between O3 and Mg II, T and Mg II, and O3
and T are consistent with photochemical reactions occurring in the
stratosphere and large-scale transport; and (iii) wavelet cross-spectra
between O3 and Mg II index show common power for the 11-year period,
particularly in tropical regions around 30–50 hPa, and different relative
phase in the upper and lower stratosphere. A comprehensive insight into the
actual processes accounting for the observed correlation between ozone and
solar UV variability would be gained from an improved bias correction of
ozone measurements provided by different satellite instruments, and from the
observations of the time behavior of the solar spectral irradiance. |
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