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Nicholas Tyrrell added Dynamis_discussion.tex
over 8 years ago
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If you change the temperature of the troposphere in one part of the tropics, above the Pacific for example, the tropical atmosphere will efficiently transport that temperature change around the tropics. In the mid-latitudes the atmosphere behaves quite differently. You may have heard of the Coriolis force; it doesn't dictate which direction the water in your toilet spins, that's a myth, but it does control the direction of cyclones and large-scale atmospheric flows. It pushes winds to the left or right depending on which hemisphere you're in. The strength of the Coriolis force also changes with latitude, in the tropics it's very weak and it becomes stronger as you move towards the poles. When you heat the atmosphere it responds by moving air away from the heat source, if this happens in the mid-latitudes that flow is deflected by the Coriolis force, but in the tropics the flow is too weak to deflect the flow and the heat travels around the globe.
