timberline

upper limit of tree growth in mountainous regions or in high latitudes, as in the Arctic. Its location depends largely on temperature but also on ... [3 related articles]
Found on http://www.britannica.com/eb/a-z/t/51

Timberline

Timberline or timber line has several meanings: ...
Found on http://en.wikipedia.org/wiki/Timberline

timberline

timberline, elevation above which trees cannot grow. Its location is influenced by the various factors that determine temperature, including latitude, prevailing wind directions, and exposure to sunlight. In general, the timberline is highest in the tropics and descends in elevation toward the polar...
Found on http://www.infoplease.com/ce6/sci/A0848764.html
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