Download what is an anticyclone

What is an anticyclone (UK)?
Anticyclones bring warm, dry weather to the UK in the summer,
and cold, clear weather in the winter. They are HIGH PRESSURE
systems, which means the air is descending in the centre of the
system and so the air is warming. When air is warming, no
clouds can form so skies are clear. Here are some other points
about
anticyclones:
1 - Winds blow clockwise and out from the centre (where it is
descending).
2 - These systems move slowly and can last for weeks over the
UK. Low pressure systems (depressions) cannot move these high
pressure systems out of the way, so move around them.
3 - There is a low pressure gradient, shown by the fact that the
isobars are far apart, so there is also little wind movement.
4 - The highest pressure is in the centre of the system.
5 - There are three types of anticyclone in the world. The type
over the UK is called TEMPORARY. The others are PERMANENT
(over the equator - called the HORSE LATITUDES) and
SEASONAL, such as those over Eastern Europe and Russia in the
winter when there is a large, cold land mass so the air descends
as it is cooled, giving high pressure.