Is this described in detail in the BGS notes? I wanted to understand why a blocking anticyclone has to be a warm anticyclone and can?t be a cold one. (Sorry don?t remember the qn number in teh QB). Thanks.
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Blocking anticyclone
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Re: Blocking anticyclone
Hi,
The phenomena known as a 'blocking anticyclone' is a persistant area of high pressure which sits over UK/Northern France and 'blocks' the passage of frontal systems moving in from the North Atlantic. The frontal systems have to route to the North or to the South of the blocking anticyclone. The blocking anticyclone starts as a ridge of high pressure extending from the sub-tropical Azores High which breaks off and establishes itself as a seperate warm anticyclone; the UK rarely sees cold anticyclones.
Baz
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