Abstract:Relationships between distribution of vegetation and thermal climate under a humid climatic condition were studied using Kira‘s warmth index (WI) as an indicator and based on temperature records from 671 meteorological stations and vegetation data. Analysing the relationrhips between distribution of 15 forest types and WI, four borders (Line A, Bands B, C and D) were found among these forest types,and corresponded to the borderines between arctic (alpine) and subarctic (subalpine) zones, subarctic and cool-...