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Airmass

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Meteorology and air masses

Meteorology and air masses

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  • 1. Air Masses John Harris - Head of Geography - Radley College - UK [email_address] http://geography.radley.org.uk
  • 2. What is an air mass?
    • An air mass is a large body of air with similar temperature and/or humidity .
    • Air masses form in stable “source regions” such as in the sub tropics or near to the poles.
  • 3. Air Mass types Five main air masses affect Europe
  • 4. Air mass classification
    • Tropical Maritime (Tm) - mild and moist
    • Tropical Continental (Tc) - warm and dry
    • Polar Maritime (Pm) - cool and moist
    • Polar Continental (Pc) - cold and dry
    • Arctic Maritime (Am) - cold and moist
  • 5. Tropical Maritime Tm air masses come from the south west and originate over the Azores or the Caribbean. They bring mild, damp, cloudy weather.
  • 6. Tropical Continental Tc air masses come from the south and originate over dry northern Africa . They bring hot, dry weather and summer heatwaves.
  • 7. Polar Maritime Pm air masses come from the north-west and originate over the north Atlantic. They bring cool, moist conditions.
  • 8. Polar Continental Pc air masses come from the east and originate over Scandinavia and Russia . They bring clear dry conditions - cold in winter, warm in summer.

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