STUDY OF THE GENESIS OF THE GLOBAL CLIMAT IC FLUCTUATIONS DURING POSTGLACIATION

Experiments were carried out on the simplified atmospheric general cir culation model to estimate the climate sensitivity to the changes of t he isolation distribution at the outer atmosphere boundary and the sur face characteristics. The similationly reproduced July and January ano malies of the temperature, precipitation and evaporation correlated we ll with the paleoreconstruction data in global scale and different reg ions (Europe, N. America, Africa, Australia). It was shown that Milanc ovitch effect is a key factor in climate's dynamic during post-glaciat ion. It was shown that global cold conditions (dryase stages) are resp onse to Milancovitch effect and sea surface temperature anomalies in N orth Atlantic. Cold stages during holocene are not controlled by antar ctic surges. Fluctuations during holocene are determined primarily by the selfoscilations of climatic system and action of Milancovitch effe ct.