translate English to French: However, while models can simulate these natural variations reasonably well, they are unable to reproduce the recent trend towards a persistent strong positive phase of the NAO without including greenhouse gas forcing.
Cependant, les modÃ¨les, mÃªme s'ils simulent raisonnablement bien ces variations naturelles, restent incapables de reproduire la rÃ©cente tendance Ã une forte phase positive persistante de l'ONA si le forÃ§age des gaz Ã effet de serre n'est pas inclus.