Warm front
decreases i think
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The suns energy
Air pressure tends to increase as air gets lower in the atmosphere simply because the lower the air is, the more air there is on top of it, and that's what causes air pressure, the weight of the air. And when air is under more pressure, it naturally gets compressed. Air also tends to be warmed by proximity to the ground because it is the ground that is warmed by sunlight. Sunlight does not warm air directly since air is transparent (at least in the visible wavelengths).
How convection cyle are set-up near the earh? Warmed air sinks, creating a high-pressure area as it falls.
thermosphere
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