SCI1300 Study Guide - Midterm Guide: Atmospheric Circulation, Hadley Cell, Systematic Chaos
11 Sep 2018
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Earth(cid:859)s (cid:272)ir(cid:272)ulatio(cid:374) syste(cid:373)s (cid:449)ork to keep the pla(cid:374)et i(cid:374) ther(cid:373)al a(cid:374)d (cid:272)he(cid:373)i(cid:272)al (cid:271)ala(cid:374)(cid:272)e. Low density air rises, high density air sinks. Vertical movement: forced lifting e. g. over a mountain, buoyancy force: low density air embedded in high density will rise. Closer to the surface, greater pressure due to gravity. More energy is available at the equator than at the poles. Without any energy transport, the poles would continuously war, and the poles would continuously cool. Warm air rises, creating low pressure under it. High pressure air will move into that region. However, this is disrupted by the rotation of the earth. Force that is the result of rotation. Pulls things out, away from the centre of rotation. Centrifugal force = mass x velocity2 x radius. So, the force differs depending on position, as the size of the radius changes between the equator and the poles.
