11:670:101 Lecture 7: Chapter 8_ Air Masses, Fronts, Cyclones
11 May 2020
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Document Summary
Air masses: extremely large body of air whose temperature and humidity are similar. Chapter 8: air masses, fronts, cyclones horizontally and vertically. Source region- areas where air mass originated. Usually flat and uniform composition with light surface winds. Air masses classification based upon temperature and humidity. C=continental - dry air mass over land. Ct= only in summer time (by mexico and texas area) Continental polar (cp) and continental arctic (ca) air masses. Cold air outbreaks in winter, slight cool down in summer. Source regionl gulf of mexico and caribbean sea. Found during summer in northern mexico and adjacent arid sw. Fronts: transition zone between two air masses of different densities (temps) Winds tend to blow parallel but opposite directions. Light precip and wind speed cloudiness can occur. Cold dry stable polar air replaces warm moist unstable subtropical air. Back door cold front - fronts move in from the east or ne. Cold fronts catches up and overtakes warm front.
