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| Titel |
The role of dynamics in total ozone deviations from their long-term mean over the Northern Hemisphere |
| VerfasserIn |
K. Petzoldt |
| 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 ; 17, no. 2 ; Nr. 17, no. 2, S.231-241 |
| Datensatznummer |
250013675
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| Publikation (Nr.) |
 copernicus.org/angeo-17-231-1999.pdf |
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| Zusammenfassung |
Total ozone anomalies (deviation from the
long-term mean) are created by anomalous circulation patterns. The dynamically
produced ozone anomalies can be estimated from known circulation parameters in
the layer between the tropopause and the middle stratosphere by means of
statistics. Satellite observations of ozone anomalies can be compared with those
expected from dynamics. Residual negative anomalies may be due to chemical ozone
destruction. The statistics are derived from a 14 year data set of TOMS (Total
Ozone Mapping Spectrometer January 1979-Dec. 1992) and corresponding 300 hPa
geopotential (for the tropopause height) together with 30 hPa temperature (for
stratospheric waves) at 60°N. The correlation coefficient for the linear
multiple regression between total ozone (dependent variable) and the dynamical
parameters (independent variables) is 0.88 for the zonal deviations in the
winter of the Northern Hemisphere. Zonal means are also significantly dependent
on circulation parameters, besides showing the known negative trend function of
total ozone observed by TOMS. The significant linear trend for 60°N is \sim3
DU/year in the winter months taking into account the dependence on the dynamics
between the tropopause region and the mid-stratosphere. The highest correlation
coefficient for the monthly mean total ozone anomalies is reached in November
with 0.94.
Key words. Atmospheric composition and structure
(middle atmosphere · composition and chemistry) · Meteorology and atmospheric
dynamics (middle atmosphere dynamics). |
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