ENV100Y5 Lecture 21: L21 Ch 13 - Atmospheric Science and Weather Pt 2
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ENV100Y5 Full Course Notes
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What else makes weather happen: active weather tends to be generated along fronts(warm/cold) where air masses meet. Ex. rain happens when front passes through: cool air can (cid:858)hold(cid:859) less moisture than warm air cool air releases moisture quicker by forming clouds and releasing as rain. In the northern hemisphere when both coriolis and pressure gradient work against each other: around a low-pressure region winds circulate in the counter-clockwise (cyclonic) direction, around a high-pressure region winds circulate in the clockwise (anticyclonic) direction. Wind direction is the result of a balance between the pressure gradient and coriolis forces: Blue pressure gradient which is moving from high to low pressure. Black lines moving in a circular motion. Winds circulate around low-pressure systems in the opposite sense in the 2 hemispheres. Large-scale air movements drive global circulation, influence weather and climate: global air circulation acts to keep the air circulation even, air moves from the equator to the poles.
