Table of Contents
El Niño and La Niña are climate phenomena that result from interactions between the ocean and atmosphere in the equatorial Pacific. These events influence global weather patterns and can cause significant environmental and economic impacts worldwide.
What is El Niño?
El Niño is characterized by the warming of sea surface temperatures in the central and eastern Pacific Ocean. This warming disrupts typical weather patterns, often leading to increased rainfall in some regions and droughts in others.
What is La Niña?
La Niña involves the cooling of sea surface temperatures in the same regions. It generally produces opposite effects to El Niño, such as wetter conditions in some areas and cooler, drier weather elsewhere.
Ocean-Atmosphere Interactions
The phenomena are driven by complex interactions between ocean currents and atmospheric circulation. Changes in sea surface temperatures influence wind patterns, which in turn affect ocean currents, creating feedback loops that sustain these events.
Key Processes
- Trade winds weaken or strengthen
- Sea surface temperatures fluctuate
- Atmospheric pressure patterns shift
- Ocean currents adjust accordingly