Research output: Contribution to journal › Article › peer-review
Northern winter stratospheric temperature and ozone responses to ENSO inferred from an ensemble of Chemistry Climate Models. / Cagnazzo, C.; Manzini, E.; Calvo, N.; Douglass, A.; Akiyoshi, H.; Bekki, S.; Chipperfield, M.; Dameris, M.; Deushi, M.; Fischer, A. M.; Garny, H.; Gettelman, A.; Giorgetta, M. A.; Plummer, D.; Rozanov, E.; Shepherd, T. G.; Shibata, K.; Stenke, A.; Struthers, H.; Tian, W.
In: Atmospheric Chemistry and Physics, Vol. 9, No. 22, 2009, p. 8935-8948.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Northern winter stratospheric temperature and ozone responses to ENSO inferred from an ensemble of Chemistry Climate Models
AU - Cagnazzo, C.
AU - Manzini, E.
AU - Calvo, N.
AU - Douglass, A.
AU - Akiyoshi, H.
AU - Bekki, S.
AU - Chipperfield, M.
AU - Dameris, M.
AU - Deushi, M.
AU - Fischer, A. M.
AU - Garny, H.
AU - Gettelman, A.
AU - Giorgetta, M. A.
AU - Plummer, D.
AU - Rozanov, E.
AU - Shepherd, T. G.
AU - Shibata, K.
AU - Stenke, A.
AU - Struthers, H.
AU - Tian, W.
PY - 2009
Y1 - 2009
N2 - The connection between the El Nino 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 degrees 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.
AB - The connection between the El Nino 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 degrees 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.
KW - MIDDLE ATMOSPHERE
KW - SOUTHERN OSCILLATION
KW - INTERACTIVE CHEMISTRY
KW - EL-NINO
KW - VARIABILITY
KW - SIMULATIONS
KW - TRENDS
KW - VALIDATION
KW - HEMISPHERE
KW - ANOMALIES
U2 - 10.5194/acp-9-8935-2009
DO - 10.5194/acp-9-8935-2009
M3 - статья
VL - 9
SP - 8935
EP - 8948
JO - Atmospheric Chemistry and Physics
JF - Atmospheric Chemistry and Physics
SN - 1680-7316
IS - 22
ER -
ID: 121291774