Geophysical Journal | 1999 volume 21 4

The relation of geomagnetic field variations with paleoclimote changes in Central and North Europe for the last 12500 years

© Bakhmutov V.G.

Possible mechanisms of the causes of long term climate changes and geomagnetic field variations are discussed. The climate fluctuation of the period of n x 104÷105 years could be explain by Milankovitch astronomic theory. The fluctuation of the period of 102÷103 years are discussed in the framework of the hypothesis of the connection with geomagnetic field secular variation. The analyses of meteorological situations in Europe by the various of geomagnetic activity (indicating the intensity of corpuscular radiation) show the relationship between corpuscular radiation and atmospheric circulation. The change of atmospheric circulation with decrease of meridional circulation and zonalization of atmospheric flow caused by processes along the auroral area and cyclone around of geomagnetic pole is the form of triggering mechanism. The long - range fluctuations in recent geological time are connected with the position of geomagnetic pole (the center of the auroral oval). On the bases of paleomagnetic data from more then 30 outcrops and cores of Late Weichselian-Holocene lacustrine, glaciofluvial and glaciomarine sediments on the territory of N-W Russia (basically from Karelia and Kola peninsula) the de - and inclination composite curves for the last 12500 years were constructed. Taking into account this results the calculation of virtual geomagnetic poles (VGP) drift and it analyses with paleotemperature and paleoclimate phases in N-NE Europe were carried out. The alternation of stadial (cold) and interstadial (warm) stages as a function of approaching (receding) of the geomagnetic pole to North Europe for the 12.5÷5 kyr were established. For the last 5 kyr according to by the archaeomagnetic data from Ukraine the correlation is reverse. It could be explained by the high intensity of geomagnetic field in this time interval.

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