What are the climate impacts of El Niño?
El Niño and La Niña are associated with substantial socio-economic impacts in South America, which can often be linked to corresponding changes in precipitation and temperature, thereby, triggering (or amplifying) drought and/or flooding.
Does El Niño cause extreme weather?
Once an El Niño is declared, it seems every extreme weather-related event in the world is blamed on this phenomenon. El Niño is the largest natural disruption to the Earth system, with direct impacts across most of the Pacific Ocean.
How does El Niño affect the weather in South America?
During an El Niño event, the surface of the tropical Pacific Ocean gets warmer than usual, particularly at the equator and along the coasts of South and Central America. Warm oceans lead to low pressure systems in the atmosphere above, which in turn leads to a lot of rain for the western coasts of the Americas.
How does La Niña affect the climate of the Pacific Ocean quizlet?
The Eastern Pacific Ocean’s temperature decreases during La Nina. It is still warmer than our ocean but compared to an average year, the water is cooler. … The Atlantic Ocean’s temperature increases during La Nina. It is still cooler than the Eastern Pacific, but compared to an average year, the water is warmer.
How does El Niño affect Antarctica?
When the pressure over the Amundsen Sea is higher than normal—as is the case during El Niño—the near-surface winds are more northwest-to-southeast. This transports warmer, moister air from the ocean to west Antarctica, resulting in more snow.
How are sea temperatures and weather conditions during an El Niño different from non El Niño conditions?
During El Niño, the surface winds across the entire tropical Pacific are weaker than usual. Ocean temperatures in the central and eastern tropical Pacific Ocean are warmer than average, and rainfall is below average over Indonesia and above average over the central or eastern Pacific.
How does El Niño affect precipitation?
El Niño occurs when warm water builds up along the equator in the eastern Pacific. The warm ocean surface warms the atmosphere, which allows moisture-rich air to rise and develop into rainstorms. … During El Niño years, such as 1997, the southeast receives more rain than average.