The Wind
The wind is a convection
current of the air. The sun warms the ground, the air near it rises, and cold
air f s into the area. We feel the f of air from cool regions to warm
regions as wind. Wind m s
snow best. Neither rain nor the sun melts snow much unless a ied by a warm wind or something that
works as a solar c r. Winds that are warm and dry can
sublimate a huge amount of snow directly into the dry air almost overnight. The
r n of the earth causes the Coriolis
effect and this decides the directions of global winds most significantly.
Because the points near the e r
are moving much faster than the points than other points on the earth, the air
going north or south from the
e
r cannot go straight but bend to
the east. The air going from the poles towards the e r
bends to the west because the ground moves faster and faster than its original
speed. This is the reason why storm systems in the Northern Hemisphere usually
rotate c e and those in the Southern
Hemisphere usually rotate in a c e.
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