GEOG 1300 Lecture Notes - Lecture 1: Subduction, Northern Hemisphere, Dew Point
2 Dec 2016
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Document Summary
Stable air: non-buoyant, remains immobile unless forced to rise, clouds; straitform, cirriform, precip; drizzle. Unstable air: buoyant, rises without outside force, clouds; cumuloform, precip; showery. Atmospheric lifting and precipitation convective lifting: convenctive cell, eg. hadley cell, results from adiabatic cooling, precip = large raindrops, fast short storms, warm locations/seasons. Orographic lifting: air forced upslope (mountain, as air moves down leeward side, it warms, rain stops, rain shadow = dry area leeward side. Frontal lifting: when warm and cool air masses meet, warm air rises over cool air, may be cooled to dewpoint, clouds and precipitation. Convergent lifting: low pressure systems two come together and meet, air converges, uplifts, forced uplift = precipitation, lower latitudes. If ascending air is cooled to dewpoint, precipitation results. Air masses affecting north america: a= arctiv, cp = continental polar, mp = maritime polar, ct = continental tropical, mt = maritime tropical.
