Unit 7 Fronts and Storms

Unit 7 Fronts and Storms - Unit 7 Fronts and Storms 1 Air...

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Unit 7 Fronts and Storms 1. Air Mass 1. Large, distinct parcel of air with 3 attributes 1. More than 1,000 miles in diameter 2. Uniform properties in the horizontal direction 3. Appears as a recognizable entity that is distinct from surrounding 2. Source Regions 1. Arctic (A) 1. Always cold and very dry 2. Continental Polar (cP) 1. Cold and dry 3. Continental Tropical (cT) 1. Hot and dry 4. Maritime Polar (mP) 5. Maritime Tropical (mT) 1. Gulf of Mexico 2. Hot and moist 6. Equatorial (E) 1. Hurricanes *****Little c means forms over land C) Movement and modification tied to air masses 7) Changes that occur when an ait mass moves out of it source region (1) Thermal modification (a) (+- temperature) (2) Dynamic modification (3) The addition or subtraction of moisture 8) Fronts (1) A boundary zone separating unlike air masses (a) Defined by differences in (i) Temperature* (ii) Humidity* (iii) Density (iv)Stability (2) Types of fronts (a) Warm Front (i) Red line with half circle.
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