Question: Why Are Peruvian Coastal Waters Warmer During El Nino Than During Normal Years?

How does El Niño affect ocean temperatures near Peru?

El Niño also produces widespread and sometimes severe changes in the climate. Convection above warmer surface waters bring increased precipitation. Rainfall increases drastically in Ecuador and northern Peru, contributing to coastal flooding and erosion.

Why does El Niño affect Peru?

After a period of severe drought, per recent news reports the “El Niño” effect is bringing heavy rainfall on Peru´s Northern coast causing overflowing of rivers, mudslides and flooding. As part of the “El Niño” effect warm waters appear on the ocean surface near or during December thus causing rainfall to increase.

What happens to the ocean water around Peru during El Niño?

During an El Niño event the trade winds weaken. Warm, nutrient-poor water is not pushed westward and comes to occupy the entire tropical Pacific Ocean. The cold water is not forced to the surface and the coastal waters of Peru and Ecuador are unusually warm.

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Why does the Peruvian fishery fail during an El Niño event?

When El Niño conditions occur, warmer water off of equatorial South America and weaker trade winds dampen the usual upwelling, reducing the amount of available nutrients. The lack of nutrients affects marine life throughout the food chain, resulting in severe impacts to the Peruvian fisheries.

Does La Nina mean more rain?

Rain clouds normally form over warm ocean water. La Niña blows all of this warm water to the western Pacific. This means that places like Indonesia and Australia can get much more rain than usual. However, the cold water in the eastern Pacific causes less rain clouds to form there.

What are 2 effects of El Niño?

Severe drought and associated food insecurity, flooding, rains, and temperature rises due to El Niño are causing a wide range of health problems, including disease outbreaks, malnutrition, heat stress and respiratory diseases.

Why do fishermen get less catch during El Niño?

An El Niño reduces the upwelling of cold water off the coast of the Americas. When this happens, fish either die or migrate into areas where they’ll find more to eat. Off California, fish populations may also be reduced.

Is La Nina good for fishing?

La Niña usually has a positive impact on the fishing industry of western South America. Upwelling brings cold, nutrient-rich waters to the surface. Nutrients include plankton eaten by fish and crustaceans. Higher-level predators, including high-value fish species such as sea bass, prey on the crustaceans.

Does El Niño cause drought?

One such phenomenon is the periodic occurrence of El Niño. During El Niño episodes the normal patterns of tropical precipitation and atmospheric circulation are disrupted, hence triggering extreme climate events around the globe: droughts, floods and affecting the intensity and frequency of hurricanes.

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How long do El Ninos last?

El Niño and La Niña episodes typically last 9-12 months. They both tend to develop during the spring (March-June), reach peak intensity during the late autumn or winter (November-February), and then weaken during the spring or early summer (March-June).

What did fishermen in Peru notice about the temperature of the water?

The lack of fish is the reason that El Nino was first discovered by the Peruvian fishermen. They noticed that every three to seven years, there would be virtually no fish in the seas. The change in water temperature of the Pacific Ocean during El Nino is usually less than 1.5C.

Is El Nino good for fishing in Peru?

The El Niño affects traditional fisheries in Peru and Ecuador. However, when this upwelling of water weakens as in El Niño affected years, warmer, low nutrient rich water spreads along the coast, and the catch is severely affected.

What is a positive effect of El Niño?

Fewer hurricanes and other tropical cyclones in the north Atlantic. Milder winters in southern Canada and the northern continental United States. Replenishment of water supplies in the southwestern U.S. Less disease in some areas due to drier weather (like malaria in southeastern Africa)

What is El Niῆιo effect?

El Niño is a phenomenon that occurs when unusually warm ocean water piles up along the equatorial west coast of South America. When this phenomenon develops, it affects weather patterns around the globe, including the winter weather along the west coast of North America.

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What is the cycle of El Niño?

They are a part of a natural cycle known as the El Niño–Southern Oscillation (ENSO) and are associated with a sustained period (many months) of warming (El Niño) or cooling (La Niña) in the central and eastern tropical Pacific. The ENSO cycle loosely operates over timescales from one to eight years.

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