Квазипериодические колебания приземной температуры Северного полушария в последнем тысячелетии

Abstract

The climate of the last millennium is characterized by a weak and practically linear large-scale decrease of the global temperature (~0.28 °С/103 years), that is connected with a change of the terrestrial orbit eccentricity — the reaction of the terrestrial climatic system on ''the orbital signal''. Quasiperiodic fluctuations of the ground temperature on the background of the cooling with the periods of 57±1 and 66±2 years following from the analysis of the available temperature series restored by a non-direct way and those with the period 58±3 years obtained as a result of instrumental observations, practically coincide. The analysis of possible factors of quasi-periodic fluctuations of temperature in the last millennium and in the modern period is carried out.