bioclimatic_subzones

Map: Bioclimatic subzones, boreal forests and forest tundra.

• Bioclimatology: branch of climatology that deals with the effects of the physical environment on living organisms over an extended period of time.
• Boreal forest or Taiga: a biome characterized by coniferous forests consisting mostly of pines, spruces, and larches.
• Forest tundra: Areas of transition from forested to non-forested landscapes. At high latitudes, north of the main zone of boreal forestland, growing conditions are not adequate to maintain a continuously closed forest cover, so tree cover is both sparse and discontinuous.
  

You can use the map freely, provided that the sources are credited.

Sources:

• Map: Arto Vitikka /Arctic Centre, University of Lapland
  
• Circumpolar Arctic Vegetation Map (CAVM) (bioclimatic subzones)
  
• Ecoregions 2017 (definitions for the forest tundra and boreal forests).