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How does altitude make mountain climates colder?
ClimateMountains
Quick Answer
Air pressure drops with height, so rising air expands and cools. On average, temperature decreases by about 6.5 Β°C per kilometer in the lower atmosphere.
The Full Story
Higher elevations have lower air pressure, so air parcels expand as they rise and cool in the process. In the lower atmosphere, the average environmental lapse rate is about 6.5 Β°C per kilometer, though the exact value changes with weather conditions. This is why mountain peaks can be snow-covered even in regions that are warm at low elevations. Altitude also affects rainfall, wind exposure, and the length of the growing season.
Key Facts
1.Average lapse rate in the lower atmosphere is about 6.5 Β°C per km
2.Mountains can have snow while nearby lowlands are warm
3.Altitude influences precipitation and wind, not just temperature
YouTube Angle
Suggested video title for this topic:
"Why is it freezing on a mountain when the valley is warm?"