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Chapter 5

Chapter 5. Air Pressure Decreases with increasing elevation Equatorial low and polar highs: thermal driving Subtropical highs and subpolar lows: mechanic driving Wind Horizontal movement in response to pressure difference Pressure gradient Wind direction

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Chapter 5

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  1. Chapter 5 • Air Pressure • Decreases with increasing elevation • Equatorial low and polar highs: thermal driving • Subtropical highs and subpolar lows: mechanic driving • Wind • Horizontal movement in response to pressure difference • Pressure gradient • Wind direction • Controlled by Coriolis effect and surface friction

  2. Coriolis effect • Deflects to the right in the Northern Hemisphere • Geostrophic wind and surface wind • Northern Hemisphere • Cyclone (low pressure cell): counterclockwise • Anticyclone (high): clockwise • Divergent and convergent wind circulation • Windward and leeward

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