Much of the north and central parts of the country are affected by the South Atlantic High, with a strong influence in the eastern parts than in the west.
12.
During summer, the interaction between the South Atlantic High and the Chaco Low brings northeasterly and easterly winds that carry moisture to the region, particularly in the northern parts.
13.
During the winter months, the intertropical convergence zone, the South Pacific, and the South Atlantic highs move northward while the Chaco Low weakens, all of which results in the suppression of rain during the winter.
14.
During summer, the interaction between the South Atlantic high and the Chaco low causes the low pressure system to bring northeasterly and easterly winds that carry moisture to the region, particularly in the northern parts.
15.
Into the South Atlantic the fleet faced the challenge of the adverse South-East Trades before having to negotiate the " South Atlantic High " and then finding fresh Westerlies which pushed the fleet towards Cape Town.
16.
The Chaco Low also interacts with the South Atlantic high to bring warm and tropical air from the north which is the strongest in summer when the Chaco Low is at its strongest due to higher insolation.
17.
During winter, both the South Pacific and South Atlantic highs move to the north, while the Subpolar Low strengthens, which, when combined with higher ocean temperatures than the surrounding land, results in higher precipitation during this time of the year.
18.
During the winter months, the intertropical convergence zone moves northwards to Ecuador while both the South Pacific and South Atlantic high move northwards, and the Chaco low weakens, all of which result in the suppression of rain during the winter.
19.
Being located between the semipermanent South Pacific and the South Atlantic Highs at around 30 o S, and the Subpolar Low at arount 60 o S, the movement of the high and low pressure systems, along with ocean currents, determine the precipitation pattern.
20.
The semi permanent South Atlantic High influences its climate throughout the year by bringing in moist winds from the northeast, which bring most of the precipitation to the city in the form of Pampero from the south and warm, humid tropical air from the north.
