 |
| Titel |
Northern winter stratospheric temperature and ozone responses to ENSO inferred from an ensemble of Chemistry Climate Models |
| VerfasserIn |
C. Cagnazzo, E. Manzini, N. Calvo, A. Douglass, H. Akiyoshi, S. Bekki, M. Chipperfield, M. Dameris, M. Deushi, A. M. Fischer, H. Garny, A. Gettelman, M. A. Giorgetta, D. Plummer, E. Rozanov, T. G. Shepherd, K. Shibata, A. Stenke, H. Struthers, W. Tian |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 9, no. 22 ; Nr. 9, no. 22 (2009-11-27), S.8935-8948 |
| Datensatznummer |
250007769
|
| Publikation (Nr.) |
 copernicus.org/acp-9-8935-2009.pdf |
|
|
|
|
|
| Zusammenfassung |
| The connection between the El Niño Southern Oscillation (ENSO) and the
Northern polar stratosphere has been established from observations and
atmospheric modeling. Here a systematic inter-comparison of the sensitivity
of the modeled stratosphere to ENSO in Chemistry Climate Models (CCMs) is
reported. This work uses results from a number of the CCMs included in the
2006 ozone assessment. In the lower stratosphere, the mean of all model
simulations reports a warming of the polar vortex during strong ENSO events
in February–March, consistent with but smaller than the estimate from
satellite observations and ERA40 reanalysis. The anomalous warming is
associated with an anomalous dynamical increase of column ozone north of
70° N that is accompanied by coherent column ozone decrease in the
Tropics, in agreement with that deduced from the NIWA column ozone database,
implying an increased residual circulation in the mean of all model
simulations during ENSO. The spread in the model responses is partly due to
the large internal stratospheric variability and it is shown that it
crucially depends on the representation of the tropospheric ENSO
teleconnection in the models. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|