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Geography

Weather systems

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Anticyclones

Anticyclones are the opposite of depressions [depression: In meteorological terms, a depression is an area of low air pressure. ] - they are an area of high atmospheric pressure where the air is sinking.

  • As the air is sinking, not rising, no clouds or rain are formed. This is because as the air sinks it warms, meaning it can hold more water.
  • The absence of fronts means winds may be very light.
  • Consequently, high-pressure areas are often associated with settled, dry and bright conditions.
  • In summer, anticyclones bring dry, hot weather. In winter, clear skies may bring cold nights and frost.
  • In cold conditions, anticyclones may also bring fog and mist. This is because the cold forces moisture in the air to condensecondensation: Condensation is a change of state in which gas becomes liquid by cooling. at low altitudes.
Synoptic chart of a typical summer anticyclone

Synoptic chart of a typical summer anticyclone

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