The cold anticyclones arising in the polar regions have been divided into the following categories on the basis of activation:
1. Temporary and transient anticyclone.
2. Semi – permanent anticyclone.
1. Temporary and transient anticyclone: This type of anticyclone ends on their way by themselves. Only a few of these reach the tropics.
2. Semi – permanent anticyclone: These are more active and the path of these types of anticyclones is also extended.