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chapter 7 book notes

chapter 7 book notes - Physical Geography Book Notes...

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Physical Geography Book Notes Chapter 7 Transient Atmospheric Flows and Disturbances I. The Impact of Storms on the Landscape a. Uprooted trees, erosion, flooding b. Promote diversity of plant cover, add moisture to earth II. Air Masses a. Large variable parcels of air b. Characteristics i. Large=more than 1000 miles across and several miles deep ii. Uniform properties horizontally (across the altitude) iii. Travel as one entity, not torn by differences in airflow c. Origin i. Develops by staying over a uniform surface long enough to develop homogeneous characteristics ii. Stable air; usually anticyclone conditions iii. Source regions 1. extensive, physically uniform, a. ocean, flat land with even covering like snow, forest, desert d. Classification i. Air type and origin- moist, dry, warm, cool e. Movement and modification i. When a mass moves it changes its structure 1. thermal modification 2. dynamic modification a. uplift, turbulence etc… ii. modifies weather of the region where it moves f. North American Air Masses i. No east-west mountain ranges, easier to move air masses III. Fronts a. When unlike air masses meat b. Three dimensional zone separating warm and cold air c. Fronts lean, leading to uplifting and adiabatic cooling d. Warmer air rises over cooler air e. Warm Fronts i.
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