Köppen climate classification
The Köppen climate classification divides climates into five main climate groups, with each group being divided based on seasonal precipitation and temperature patterns. The five main groups are "A" (tropical), "B" (dry), "C" (temperate), "D" (continental), and "E" (polar). Each group and subgroup is represented by a letter. All climates are assigned a main group (the first letter). All climates except for those in the "E" group are assigned a seasonal precipitation subgroup (the second letter). For example, "Af" indicates a tropical rainforest climate. The system assigns a temperature subgroup for all groups other than those in the "A" group, indicated by the third letter for climates in "B", "C", and "D", and the second letter for climates in "E". For example, "Cfb" indicates an oceanic climate with warm summers as indicated by the ending "b". Climates are classified based on specific criteria unique to each climate type.
Scandinavian coastal conifer forests
There are two subtypes of this rainforest; the Namdalen type and the Brønnøy/Fosen type. There are also broadleaf trees scattered in this forest, especially in the Brønnøy/Fosen type. Broadleaf trees include birch (Silver Birch "Betula pendula" and Downy Birch "Betula pubescens"), European Rowan ("Sorbus aucuparia"), Aspen ("Populus tremula"), Goat Willow ("Salix caprea"), and Grey Alder ("Alnus incana"). Rarer species are Wych Elm ("Ulmus glabra"), Common Hazel ("Corylus avellana") and Black Alder ("Alnus glutinosa") (the latter only in the southern part of the area). The climate is also warm, and ya.