La Niña is caused by a build-up of cooler-than-normal waters in the tropical Pacific, the area of the Pacific Ocean between the Tropic of Cancer and the Tropic of Capricorn. Unusually strong, eastward-moving trade winds and ocean currents bring this cold water to the surface, a process known as upwelling.
Q. How does La Nina affect Africa?
Africa and Asia La Niña could also lead to increased rainfall in southern Africa, WMO said. This was indicated by some recent seasonal forecast models, it added. La Niña could also affect the South West Indian Ocean Tropical Cyclone season, reducing the intensity.
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Q. How does El Nino and La Nina affect the weather in South Africa?
El Nino (La Nina) years are associated /Vith dry (wet) conditions in South Africa (e.g. Lindesay, 1988; Nicholson and Kim, 1997; Richard et al, 2000; Landman and Mason, l 999b ), and modelling studies have shown that during a severe El Nino event there is a reduction in water availability and decreased maize yields in …
Q. How does El Nino and La Nina affect the environment?
El Niño and La Niña affect not only ocean temperatures, but also how much it rains on land. Depending on which cycle occurs (and when), this can mean either droughts or flooding. Typically, El Niño and its warm waters are associated with drought, while La Niña is linked to increased flooding.
Q. How does La Nina affect climate change?
In a warming climate, rainfall extremes are projected to shift eastward along the equator in the Pacific Ocean during El Niño events and westward during extreme La Niña events.
Q. Is El Nino worse than La Nina?
During El Niño, the jet stream is oriented from west to east across the southern portion of the United States. Thus, this region becomes more susceptible to severe weather outbreaks during the winter. Conversely, during La Niña, the jet stream and severe weather are likely to be farther north.
