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Arctic treeline

Similar term(s): timberline, tree-line.

Definition:

The northern limit of tree growth; the sinuous boundary between tundra and boreal forest.

Source: AMS Glossary of Meteorology 

More:

Climate change is projected to cause vegetation shifts because rising temperatures favor taller, denser vegetation, and will thus promote the expansion of forests into the arctic tundra, and tundra into the polar deserts.

Northward shifting treeline Northward shifting treeline

Source: ACIA Impacts of a Warming Arctic  

To read about this term in context:

GreenFacts Summary on Arctic Climate Change:

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