P1B 03 El Niño and La Niña Flashcards

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El Niño

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A warm phase of ENSO characterized by warmer sea temperatures and weaker trade winds.

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Significance of Upwelling

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Brings nutrient-rich water to the surface.

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El Nino Southern Oscillation (ENSO) describes the position of warm and cool water, the strength of winds, and atmospheric conditions in the Equatorial Pacific Ocean region.

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The position of warm and cool water, the strength of winds, and atmospheric conditions in the Equatorial Pacific Ocean region.

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Duration of ENSO Events

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Each ENSO event normally lasts around 2 years.

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Effects of La Nina

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La Nina can lead to decreased rainfall and cooler temperatures in certain regions.

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Impact of weakened trade winds during El Niño

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Weakened trade winds during El Niño lead to warm surface water accumulating in the eastern Pacific.

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Definition of La Niña

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A cool phase of ENSO characterized by cooler sea temperatures and stronger trade winds.

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Impact of stronger trade winds during La Niña

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Stronger trade winds during La Niña lead to cooler surface water accumulating in the eastern Pacific.

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Role of the Thermocline in ENSO

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The thermocline's depth changes during ENSO events, affecting nutrient availability and sea surface temperatures.