Whats an anti-trade wind?
The compensating air flow for the trade wind is a kind of anti-trade wind in the uppermost troposphere, located above the trades, where the flow of air is going east and away from the convergence. The compensating flow for the rise of the air in the convergence is the downward motion of air in the desert zone, centered between 20 and 30° latitude. This falling air heats up as the pressure increases and is therefore greatly under-saturated with water vapor. This produces clear skies, evaporation at the sea surface (or soil) and general aridity. (To verify this check the positions of the major deserts on a map.) Surface air from subtropical regions returns towards the equator (as the Trade Winds) to replace the rising air, so completing the cycle of air circulation within the Hadley cell. Some of the air which settles in the horse latitudes goes back immediately into the trade winds. The rest flows towards the poles and circulates there for a time before edging back toward the equator. T
