
1) Arctic geography terminology 2) Polar circle 3) Region of Canada 4) Subpolar 
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1) Subpolar 
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https://www.crosswordclues.com/clue/subarctic

 The subarctic is a region in the Northern Hemisphere immediately south of the true Arctic and covering much of Alaska, Canada, Iceland, the north of Scandinavia, Siberia, northern Mongolia, much of Scotland and even parts of northern England. Generally, subarctic regions fall between 50°N and 70°N latitude, depending on local climates. == Climat...
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http://en.wikipedia.org/wiki/Subarctic

• (a.) Approximately arctic; belonging to a region just without the arctic circle.
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Area just below the Arctic Circle characterized by acidic soils and taiga forest vegetation.
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http://www.encyclo.co.uk/local/22218
 Sub·arc'tic  adjective
Sub·arc'tic  adjective  Approximately arctic; belonging to a region just without the arctic circle. 
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http://www.encyclo.co.uk/webster/S/219

[
adj] - of or relating to latitudes just south of the Arctic Circle
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http://www.webdictionary.co.uk/definition.php?query=subarctic

subarctic Related 'bear, bears (animals)' word units: Berserk; ursi-.
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http://www.wordinfo.info/words/index/info/view_unit/181/2
 adjective
 adjective of or relating to latitudes just south of the Arctic Circle
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https://www.encyclo.co.uk/local/20974

of, pertaining to, similar to, or being the region immediately south of the Arctic Circle; subpolar.
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https://www.infoplease.com/dictionary/subarctic
  No exact match found.