the.com/treeline
the altitude where trees throw in the towel and the mountain wins.
means The boundary line on a mountain or in a polar region beyond which trees can no longer grow, usually because it's too cold, too windy, or too high.
from A transparent English compound of "tree" and "line," both old Germanic words — "tree" traces back through Old English "treow" to a root shared with words for wood and timber, while "line" comes via Latin "linea," originally a thread or string made of flax ("linum"). The pairing is a relatively modern geographer's and mountaineer's term, naming the visible threshold where forest gives up — a literal line you can trace across a slope.
- temperature limit
- Trees stop where summers average below 10°C.
- krummholz
- Last trees grow twisted, stunted, hugging the ground.
- rising higher
- Warming climate is pushing treelines steadily upslope.
- equator effect
- Treelines climb highest near the tropics, around 4000 meters.
- not a line
- It's actually a fuzzy transition zone, not sharp.
treeline of mount kilimanjaro — alpine zone begins around 3,500m elevation on africa's highest peak in tanzania
treeline of the rockies — subalpine forest ends around 11,000-12,000 feet in colorado and throughout north america's mountain range
treeline of siberia — boreal forest boundary marks the southern edge of the arctic circle across northern russia, ~200 million hectares