Have you ever pondered how the weather in various regions of the world might be influenced by the temperature of an ocean? The warming of a single region of the Pacific Ocean can affect temperature, rainfall, agriculture, and even marine life, which may come as a surprise. El Niño is the name of this fascinating climate event.
What is El Niño?
What happens when the temperature of the ocean changes? Ocean temperatures change— 1) influence winds, 2) cloud formation and 3) rainfall patterns. The ocean and atmosphere are closely interconnected with each other.
It is a natural climate phenomenon that occurs in the tropical Pacific Ocean, where surface water in the Central Pacific Ocean is warmer than usual.
Considering the Pacific Ocean as a huge system that helps to regulate weather around the world. Normal temperature patterns change; the effects can be felt far beyond the ocean itself.
El Niño is a larger climate pattern called the El Niño-Southern Oscillation or ENSO. El Niño—warm phase; La Niña—cool phase.
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How does El Niño develop?
Trade winds blow from east to west across the tropical Pacific Ocean under normal conditions. These winds push warm surface water towards Indonesia and Australia, while cooler water rises towards the surface in parts of the eastern Pacific. But during El Niño, these winds weaken. So warm water can spread towards the central and eastern Pacific. Ocean temperatures rise in important monitoring regions and the usual patterns of atmospheric circulation begin to change. As a result, rainfall may shift from one region to another.
Personal experience of El Niño
During May, June and July, the high temperatures in my locality were a major concern for me. Lack of groundwater for nearly two months, we could not obtain groundwater for our household needs and we had to depend on the water supplied by the government. The water scarcity affected not only household groundwater sources but also local water bodies. The water in some temple ponds had completely dried up, highlighting the severity of the dry conditions. In addition, some families had to arrange drinking water in barrels and bring water home using water-supply lorries to meet their daily household needs. This situation showed how difficult it had become for residents to access essential water supplies and how heavily they had to depend on alternative sources to manage their everyday activities.
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