edu.ucar.opensky::articles:15186 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-26T14:59:09.176368 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7cc11qj Northern winter stratospheric temperature and ozone responses to ENSO inferred from an ensemble of Chemistry Climate Models 2009-11-27T00:00:00Z publication https://n2t.org/ark:/85065/d7cc11qj https://doi.org/10.5194/acp-9-8935-2009 Cagnazzo, C. author Manzini, E. author Calvo, N. author Douglass, A. author Akiyoshi, H. author Bekki, S. author Chipperfield, M. author Dameris, M. author Deushi, M. author Fischer, A. author Garny, H. author Gettelman, Andrew author Giorgetta, M. author Plummer, D. author Rozanov, E. author Shepherd, T. author Shibata, K. author Stenke, A. author Struthers, H. author Tian, W. author UCAR/NCAR - Library publisher 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. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright Author(s) 2009. This work is distributed under the Creative Commons Attribution 3.0 License. None eng geoscientificInformation