Evidence for influence of the solar wind variations on atmospheric temperature in the southern polar region

摘要

Detailed analysis of meteorological and aerological data from Vostok station (Antarctica) for 1978-1992 made it possible to conclude that dramatic changes of the troposphere temperature, observed in the southern polar region, are related to the variations of the interplanetary magnetic field (IMF). The warming is observed at ground level and cooling at h > 10 km if the IMF vertical component decreases (△B_Z < 0). The opposite deviation of the atmospheric temperatures (cooling at the ground level and warming at h > 10 km) is observed for △B_Z > 0. There is a linear relationship between the value of change in the interplanetary electric field (△E_(SW)) and ground temperature at Vostok station: the larger is the leap in the E_(SW) the stronger is the temperature deviation. The effect reaches maximum within 1 day and is damped equally quickly. The tropospheric pressure and horizontal winds respond to the E_(SW) fluctuations as well. It is suggested that the interplanetary electric field affects the katabatic system of atmospheric circulation typical of the ice dome in winter Antarctic.