Geomagnetic activity and atmospheric circulation
© Martazinova V.F., Bahmutov V.G., Chulkov I.S.
Results of studies the effect of geomagnetic field perturbations on the large-scale atmospheric
circulation in the northern hemisphere have been presented. The characteristics of the planetary
high frontal zones (PHFZ) at the middle level of troposphere in the years of high or low solar activity
have been determined. When the geomagnetic activity is high the PHFZ has latitudinal character.
But when it is low, the PHFZ has strong meridional character. The differences in troposphere baric
fields are evident, when the daily geomagnetic
index ΣÊð has its
minimal or maximal value
irrespective of year of high or low solar activity. When ΣÊð has its minimal value, the atmospheric
circulation in the northern hemisphere reduces baric formations in 1-2 days, but when ΣÊð has its
maximal value, the cyclonic and anti-cyclonic activities appear over the most territory of the northern
hemisphere in 2-3 days.