ENSO - AP Environmental Science

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Question

The El Niño phase of ENSO is associated with:

Answer

The El Niño phase of ENSO is associated with warmer surface temperatures in the eastern Pacific and higher rainfall in the central Pacific. Storms and hurricanes are more frequent in the central Pacific. There is a weaker upwelling of nutrient-rich water off the coast of South America during this phase.

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Question

The impacts of ENSO (El Nino Southern Oscillation) will most strongly impact countries that border which body of water?

Answer

The correct response is Pacific Ocean. ENSO occurs specifically in the Pacific Ocean, thus its impacts will most strongly impact countries bordering the Pacific.

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Question

ENSO (El Nino Southern Oscillation) weather patterns are characterized by variations in air pressure and temperature. Which type of ENSO pattern contains both low air surface pressure and a cooling phase?

Answer

The correct response is La Nina. The La Nina has low air pressure and cooling, while El Nino contains high air pressure and warming. Madden-Julian oscillation and Coriolis effect do not make sense as answer choices.

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