ИСТИНА

The response of atmosphere circulation in Northern Hemisphere to the ENSO forcing is revisited in the light of ENSO modifications over the last decades and the possible changes in future climate. It is argued that the planetary circulation response to ENSO differs in dependence on El Niño types: the Eastern Pacific (EP) event is associated with the Rossby wave propagating poleward and is confined to the Pacific region, while the Cen-tral Pacific (CP) event induces the circulation pattern at planetary scale simi-lar to the negative phase of Arctic Oscillation (AO). The different response in temperature anomalies is further documented. In the warmer climate the difference between the CP and EP associated circulation patterns vanishes with predominance of AO-like circulation.