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Catalog Record: Arctic Alaska Bioclimate Subzone Map
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Aga arctic ak bioclimate 2005

Arctic Alaska Bioclimate Subzone Map

Various authors, working with different geobotanical traditions, have divided the Arctic into bioclimatic regions using a variety of terminologies. The origins of these different terms and approaches have been reviewed by the Panarctic Flora (PAF) initiative (Elvebakk 1999). The PAF and CAVM accepted a five-subzone version of the Russian zonal approach. The subzone boundaries are somewhat modified from the phytogeographic subzones of Yurtsev (1994). Subzone A is the coldest subzone whereas Subzone E is warmest.

Warmer summer temperatures cause the size, horizontal cover, abundance, productivity and variety of plants to increase. In Alaska, woody plants occur as hemiprostrate dwarf shrubs (<15 cm tall) in Subzone C (mean July temperatures about 5-7 C, erect dwarf shrubs (<40 cm tall) in Subzone D (mean July temperature about 7-9 C), and low shrubs (40-200 cm tall) in Subzone E (mean July temperature about 9-12 C. At treeline, where the mean July temperatures are between 10 and 12 C, woody shrubs up to 2 meters tall are abundant.

Related: AATVM, All Maps

Back to Alaska Arctic Tundra Vegetation Map

References

Elvebakk, A. 1999. Bioclimate delimitation and subdivisions of the Arctic. Pages 81-112 in I. Nordal and V. Y. Razzhivin, editors. The Species Concept in the High North - A Panarctic Flora Initiative. The Norwegian Academy of Science and Letters, Oslo.

Yurtsev, B. A. 1994. Floristic divisions of the Arctic. Journal of Vegetation Science 5:765-776.

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Data and Resources

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    Download :: GIS Data

    aga_arctic_ak_bioclimate_2005.shp.zip (75.1 KB)

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    Website :: Toolik Arctic Geobotanical Atlas

    http://www.arcticatlas.org/maps/themes/ak/akbz