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The Arctic may be considered a single region, but it can be defined and delineated in many different ways. This theme introduces the different ways the Arctic can be and has been defined by different scholars and organizations, and the many ways that the 'Arctic boundary' can be drawn on the map.
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Topography and Bathymetry
 This is a general map of the Arctic region, showing basic geography (topography and bathymetry).
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Arctic Boundaries
 The Arctic region, as defined by various Arctic Council working groups and projects.
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Arctic, as defined by temperature
 The average temperature in July is an important environmental and biological indicator of 'northernness' as an average temperature of 10º (the 10º July isotherm) closely corresponds to the treeline. The 10º July isotherm is often used by biologists as a definitional boundary of the Arctic, as the boundary between the tundra and the taiga.
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