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| Titel |
Climatology and trends in the forcing of the stratospheric ozone transport |
| VerfasserIn |
E. Monier, B. C. Weare |
| 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. 13 ; Nr. 11, no. 13 (2011-07-04), S.6311-6323 |
| Datensatznummer |
250009888
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| Publikation (Nr.) |
 copernicus.org/acp-11-6311-2011.pdf |
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| Zusammenfassung |
| A thorough analysis of the ozone transport was carried out using the
Transformed-Mean Eulerian (TEM) tracer continuity equation and the European
Centre for Medium-Range Weather Forecasts (ECMWF) Re-Analysis (ERA-40). In
this budget analysis, the chemical net production term, which is calculated
as the residual of the other terms, displays the correct features of a
chemical sink and source term, including location and seasonality, and shows
good agreement in magnitude compared to other methods of calculating ozone
loss rates. This study provides further insight into the role of the eddy
ozone transport and underlines its fundamental role in the recovery of the
ozone hole during spring. The trend analysis reveals that the ozone hole
intensification over the 1980–2001 period is not solely related to the trend
in chemical losses, but more specifically to the balance between the trends
in chemical losses and ozone transport. That is because, in the Southern Hemisphere from
October to December, the large increase in the chemical destruction of ozone
is balanced by an equally large trend in the eddy transport, associated with
a small increase in the mean transport. This study shows that the increase in
the eddy transport is characterized by more poleward ozone eddy flux by
transient waves in the midlatitudes and by stationary waves in the polar
region. Overall, this study makes clearer the close interaction between the
trends in ozone chemistry and ozone transport. It reveals that the eddy ozone
transport and its long-term changes are an important natural mitigation
mechanism for the ozone hole. This work also underlines the need for
diagnostics of the eddy transport in chemical transport models used to
investigate future ozone recovery. |
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