Spectrazonal satelite images in estimation of climatic trends of forest vegetation on west slopes of subpolar Polar Ural

The results of remote sensing monitoring of tree density in Subpolar Ural are presented per period of 18 years (1988-2006). The SMA-method of winter images was a basis for calculation of changes. The forest density was more stable in plain part of area. The main natural trends of forest density were related with increasing of crown density in ecoton zone with rare Larix is near 1-2% per year on gently sloping mountains slopes.