[ANALYSIS] Why southern Africa’s summer has been wetter than normal
These unusually wet conditions are the result ofA La Niña event is one of three phases of a climate cycle called the
The Neutral phase, representing “normal” conditions, occurs almost half of the time. Sea surface temperatures are near-average and steady trade winds blow. The trade winds cause warm water to pile up in the western Pacific, while cool waters are drawn up from the bottom of the ocean to the eastern Pacific surface. Warm, moist air rises in the western Pacific, while in the eastern Pacific cool, dry air descends. This cycle of moving air is called the.
El Niño phases are almost the direct opposite of La Niña phases. Trade winds weaken, or even reverse in direction, allowing warm waters to drift to the central and eastern Pacific. This eventually breaks down Walker Circulation.
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