Mean burned area fraction (%/ year) over mid- and high latitudes in the Northern Hemisphere. Hatched areas indicate permafrost regions. Wildfires in southeastern Siberia has stronger fire activities than other regions.
Seasonal cycle of burned area in southeastern Siberia. April and May have the most fire activities in a year. Strong Arctic Oscillation has two time more fire activities than weak Arctic Oscillation.
Fire activities according to climate factors. The stronger Arctic Oscillation index and high pressure in southeastern Siberia, the more fire activities.