Abstract
The largest tundra region completely devoid of forest is an area of 3 million km2 in northern Siberia. At most, there are 188 days in the year with a mean temperature above 0°C, and sometimes as few as 55. The low summer temperatures are partially due to the large amount of heat required to melt the snow and thaw out the ground. Winters are rather mild in the oceanic regions but extremely cold in the continental regions (Fig. 118). However, the cold pole still falls within the forest region, near Verchojansk and Oimekon, although the mean annual temperature at this point is −16.1°C and the permafrost extends far down into the ground (Fig. 113). The depth to which the ground freezes in winter has no influence upon the vegetation, since the growth of plants depends only on the thickness of the upper soil layer thawing out in summer.
Twenty-three photographs of the vegetation of the Eurasian tundra can be found in Walter, 1974.
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© 1979 Springer-Verlag New York Inc.
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Walter, H. (1979). Zonobiome of the Tundra Climate. In: Vegetation of the Earth and Ecological Systems of the Geobiosphere. Heidelberg Science Library. Springer, New York, NY. https://doi.org/10.1007/978-1-4684-0468-5_11
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DOI: https://doi.org/10.1007/978-1-4684-0468-5_11
Publisher Name: Springer, New York, NY
Print ISBN: 978-0-387-90404-7
Online ISBN: 978-1-4684-0468-5
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