Abstract
The true boreal zone (Fig. 143) commences at the point where the climate becomes too unfavorable for the hardwood deciduous species, that is to say, when summers become too short and winters too long. This is recognizable in the climate diagram as the point where the duration of the period with a daily average temperature of more than 10 °C drops below 120 days and the cold season lasts longer than 6 months(Fig. 144). The northern boundary between the boreal zone and the arctic tundra is where only approximately 30 days with a daily mean temperature above 10 °C and a cold season of 8 months are typical of the climate.
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© 1985 Springer-Verlag Berlin Heidelberg
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Walter, H. (1985). Zonobiome of the Cold-Temperate Boreal Climate. In: Vegetation of the Earth and Ecological Systems of the Geo-biosphere. Heidelberg Science Library. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-96859-4_10
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DOI: https://doi.org/10.1007/978-3-642-96859-4_10
Publisher Name: Springer, Berlin, Heidelberg
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