Resumen
We used the Laboratorie de Metereologie Dynamique General Circulation Model (LMDZ GCM) to study the sensitivity of the fields to prescribed changes in the extratropical sea surface temperature. It was observed the strong sensitivity of the dynamic fields to the anomalous forcing. Particularly, we noticed the northward displacement of the polar jet, due to the weakening of both, the baroclinicity in low levels and the transient momentum fluxes.