GEOG 1403H Study Guide - Intertropical Convergence Zone, Hadley Cell, Atmospheric Circulation
Document Summary
We"ve so far discussed many of the abiotic characteristics that define various regions of the world. Sun and atmosphere combine to form convection cells that help determine the distribution of precipitation along earth"s latitudes. On or near the equator, where average solar radiation is greatest, air is warmed at the surface and rises. This creates a band of low surface air pressure, centered on the equator known as the intertropical convergence zone. (itcz). The itcz draws in surface air from the subtropics. When this subtropical air, full of moisture, reaches the equator, it rises to the top of the troposphere, where it rains. The air then begins flowing horizontally to the north and south poles, where it begins to pick up moisture again. This rising air comprises one segment of the hadley cell. Near 30 degrees n and s, where there is high surface air pressure, the hadley cell returns air back to the surface.
