South Atlantic Anticyclone

South Atlantic Anticyclone

 

(also Saint Helena Island Anticyclone), a high-pressure system in the southern part of the Atlantic Ocean. The South Atlantic Anticyclone appears on long-term average maps of the distribution of pressure during the year, especially in the winter. It is one of the centers of atmospheric activity in the subtropical belt of the southern hemisphere.

References in periodicals archive ?
The South Atlantic anticyclone remains around 35 to 40oS in the Tristan/Gough longtitude.
The same author states that the most drastic changes would occur in the Amazon as a consequence of anomalies in the Walker circulation and the de-intensification of the South Atlantic Anticyclone.
The weak South Atlantic anticyclone remains limited throughout the period and because there is little ability to ridge round the continent, any development of a cell away to the east is restricted.
Yet, the promising pattern of airflow between a distant anticyclonic core to the east and the south Atlantic anticyclone shows little sign of departure.
We have had several occasions where the South Atlantic anticyclone buds off a ridge which squeezes around a vortex, blocking its eastward movement to some degree, while advecting some of its air flow into the vortex pattern.
The succeeding ridge of the South Atlantic anticyclone was picking up air about 55 to 60oS latitude and circulating this northward.
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