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El Nino Surface temperature of Atlantic Oceans influence El Nino
21/Sep/2006: Till now El Nino is considered to be a natural phenomenon influenced by the ocean temperatures in the pacific, but scientists from the Texas A&M University, United States, have found that surface temperatures of Atlantic waters too play a role in the El Nino event.
This discovery could lead to a better understanding of climatic variations induced by El Nino in African countries bordering the Atlantic and in building more precise climate-prediction models.
El Nino occurs when the surface temperatures of the tropical eastern Pacific Ocean increases drastically, altering the climatic cycle in the region. Warm air from the pacific drifts east and raises the temperature of tropical Atlantic waters. But some times the tropical Atlantic waters cool down after an El Nino event.
This made Ping Chang and his colleagues at the Texas A&M University (scientists involved in this study) conclude that tropical Atlantic waters actually influence the El Nino weather system with far-reaching consequences, which contradicts the general belief among the climatologists that tropical Atlantic is only a passive recipient of the El Nino weather system.
According to Chang and his colleagues, factors that determine the influence of El Nino, are interactions between Atlantic Ocean and the Atlantic atmosphere at the time when El Nino is occurring at the pacific. The findings of this study were published in the journal ‘Nature’.
Better understanding of climatic variations influenced by El Nino is essential in predicting the climatic patterns in African countries bordering the Atlantic Oceans, whose economies are based on agriculture.
Kesavan Siva
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