ENVIRSC 1C03 Lecture Notes - Lecture 12: Hadley Cell, Atmospheric Circulation, Polar Easterlies
31 Mar 2018
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Module 12: atmospheric circulation and logn tange transport. Refe(cid:396)s to the a(cid:448)e(cid:396)age at(cid:373)osphe(cid:396)i(cid:272) ai(cid:396) flo(cid:449) (cid:449)hi(cid:272)h his (cid:272)auses (cid:271)y the u(cid:374)e(cid:395)ual heati(cid:374)g of the ea(cid:396)th"s surface. As a general rule, warm air is transferred from the tropics to the poles, and cool air is transferred from the poles to the tropics. Assumes that the earth is covered by a uniform water surface, the sun is always directly overhead at the equator, and earth does not rotate. The result is a huge thermal convection cell (called the hadley cell) I(cid:374)(cid:272)o(cid:396)po(cid:396)ates the ea(cid:396)th"s rotation, however it also assumes that there are no land surfaces. The result is a model of 3 cells with alternating belts of pressure and wind. The 3 cells produced are: the hadley, ferrell, and polar cells. The alternating belts of pressure begin with a low at the equator, while the alternating belts of wind begin with easterly winds just north and south of the equator.
