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Atmospheric lifting mechanisms

Atmospheric lifting mechanisms

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Atmospheric lifting mechanisms

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  1. Atmospheric lifting mechanisms • Convergent • Convectional • Orographic • Frontal

  2. e.g. along the ITCZ

  3. Occurs over warm surfaces

  4. Convectional cloud formation over Florida

  5. Only occurs in hilly or mountainous regions

  6. Adiabatic Processes • MEANS A CHANGE IN TEMPERATURE WITHOUT THE ADDITION OR REMOVAL OF HEAT • TEMPERATURE CHANGES DUE TO EXPANSION AND CONTRACTION OF AIR • WHEN AIR EXPANDS IT COOLS WHEN IT IS COMPRESSED IT HEATS UP • Remember the NORMAL LAPSE RATE (6.4°C/1000m) • Also have the • Dry adiabatic lapse rate (DAR) • 10°C/1000m • Moist adiabatic lapse rate (MAR) • 6°C/1000m