Vol. 18, issue 01-02, article # 23

Abstract:

The space-time dynamics of forest fires and cloud cover in the North-Asian region, apart from local factors, depends, to some extent, upon solar-terrestrial relationships. Based on the AVHRR/NOAA radiometer data, the space-time dynamics of forest fires and cloud cover during the last five years in the latitude range 40-74°N has been analyzed. It is shown that forest fires are observed from May to September, mainly, during three summer months with the activity maximum in the second half of summer. In the phase of maximum of the 11-year cycle of solar activity, a trend is observed of shifting forest fires to the north. In the seasonal behavior for the period from May to August we observed a decrease of cloud cover, and from August to September its increase. During this period, the shift of cloudiness from the north and south to the region of 56-66 N was observed that can be caused by the latitude displacement of the trajectories of Atlantic cyclones, which determine the weather at the territory from Europe up to 140th meridian in the northern Asia in the phase of the maximal solar activity.