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Global Ocean Darkening
June 19 , 2025
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- More than one-fifth of the global ocean has considerably darkened in the last two decades.
- It is essentially shrinking of the photic zones or those layers of the water where sunlight can pass and induce the process of photosynthesis.
- The photic layers can go down to about 200 meters and they also act as a base for nearly 90 per cent of the world’s marine life.
- Between 2003 and 2022, nearly 21 per cent of the global ocean experienced the darkening.
- Around the same two decade-span, a considerable part of the global ocean has actually become lighter.
- The North Sea, the eastern UK coastline, and the Arctic have lost lighter than any other regions.
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