Anticyclone

In meteorology, an anticyclone is a weather phenomenon associated with atmospheric high pressure. In the northern hemisphere an anticyclone rotates in the clockwise direction, while it rotates anticlockwise in the southern hemisphere. The rotation is caused by the movement of colder higher pressure air that is moving away from the poles towards the equator being affected by the rotation of the earth.

Anticyclones generally bring fair weather and clear skys as the cold high pressure air has a lower water content. However as the anticyclone moves over the earth surface it may heat up locally, acquire water from the land or oceans or encounter warmer wet air. Local geography may cause a range of localised weather phenomena specific to anticyclones. While the interaction of the different air masses, which occurs at weather fronts, may cause a range of weather events.