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Originally Posted by sdfcvoh  I'm having a serious problem grasping why it has the effect it does on some weather circulation. |
You're kinda blurring together two different aspects of the same thing. First, rising and descending air do one thing, and air moving laterally across the earth do other things. When air is ascending or descending AND moving laterally along the earth, you will get a blend of those effects.
For instance, the air rising at the equator wants to turn towards the west due to the rising, however, it wants to turn towards the east due to its moving north. Supposedly, the rising part only produces a small force, so majority of deflection is towards the east.
When some of the literature describes ascending or descending air, they *may* be merely describing which body of air they're talking about, rather than describing the relevant direction of motion.