El Niño - Southern Oscillation

El Niño Then and Now

Guest authors
October 23, 2026
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A 35-year satellite altimetry record lets scientists hold this year’s El Niño up against its strongest predecessors.

NASA Satellites Observe Historic 2026 El Niño

Guest authors
October 16, 2026
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A phenomenon rarer than a solar eclipse and more powerful than any single storm system is unfolding this fall, and NASA is tracking it closely. El Niño is a natural climate pattern that emerges roughly every two to seven years marked by warmer-than-normal water temperatures in parts of the equatorial Pacific. NASA scientists are keeping […]

El Niño Alters Marine Life in the Pacific

Guest authors
August 10, 2026
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Satellite measurements of chlorophyll at the sea surface signal shifts in the ocean’s nutrient supplies in mid-2026.

El Niño Alters Marine Life in the Pacific

Guest authors
August 10, 2026
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Satellite measurements of chlorophyll at the sea surface signal shifts in the ocean’s nutrient supplies in mid-2026.

El Niño Is Underway

Guest authors
June 18, 2026
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Satellite observations of sea surface height indicated that the 2026 event continued to strengthen in early June.

A Subtle Return of La Niña

Guest authors
December 16, 2025
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A weak La Niña emerged in the equatorial Pacific in late 2025, and scientists are watching how it may help shape weather and climate in the months ahead.