Overall Global Climate Impact
Core overview: El Niño is a global climate phenomenon driven by abnormal warming of sea-surface temperatures in the central and eastern equatorial Pacific. It occurs every 2 to 7 years, typically lasts 9 to 12 months, directly disrupts global atmospheric circulation, breaks normal climate patterns, intensifies the broader warming trend, and greatly increases the frequency and intensity of extreme weather.
Main impacts
- Raises global temperatures abnormally, making annual heat records more likely and intensifying the overall warming trend
- Disrupts global rainfall patterns, creating drought-flood mismatches where normally wet areas can become dry and normally dry areas can face frequent heavy rain
- Triggers cascading compound weather hazards, increasing climate variability and making abnormal weather events more common