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Anticyclones
To know what causes anticyclones
To understand the seasonal variations in
weather conditions within anticyclonic
conditions…read more

Slide 3

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High or Low?
Standard
Atmospheric
Wind
Pressure
1000 mb
Air is
cooled
creating
Air is heated high
and expands Wind pressure
creating low at the
pressure at the surface
surface.…read more

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High Pressure
· In the Northern Hemisphere, high
pressures rotate clockwise
North High Equator…read more

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Anticyclones
· Anticyclones are areas of high pressure
created by the jet streams Rossby Wave ­
as it turns towards the equator it slows
down excess air piles up and descends
towards the ground.
· In other words air descends from the
upper parts of the troposphere creating
high pressure at ground level…read more

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What Type of Conditions?
· Use p.18 to find out the following about
anticyclones:
1. Are conditions stable or unstable? Why?
2. What is `Adiabatic Heating'?
3. Why are skies usually cloudless?
4. What is a `temperature inversion'?…read more

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