Archive · 29 May 2025
Ocean Darkening: A Wake-Up Call for Global Action
Scientists found that a large part of the ocean is getting darker, which means sunlight can't reach as deep.
This is because of things like pollution from farms and warmer water.
The sunlight helps plants and animals grow, and when there's less sunlight, they have a harder time.
This could lead to fewer fish and other creatures, and change the ocean’s ability to help the climate.
Scientists are concerned and want people to act to protect the ocean.
Over 21% of oceans have darkened, reducing sunlight penetration.
Darkening threatens marine biodiversity and ecosystems.
Causes include runoff, algal blooms, and warming waters.
Shrinking photic zones can disrupt the marine food web.
Scientists are calling for global action to address the issue.
- Who
- Scientists from University of Plymouth and Plymouth Marine Laboratory.
- What
- Ocean darkening, decreasing sunlight penetration.
- When
- 2003-2022
- Where
- Over 21% of the world’s oceans.
- Why
- Increased runoff, algal blooms, and warming seas.
- Affected Area
- Over 75 million square kilometers
- Time Period
- 2003-2022
- Primary Cause (Coastal)
- Nutrient/sediment runoff
- Primary Cause (Open Ocean)
- Algal bloom shifts and rising sea surface temperatures
- Photic Zone Reduction (Area of Ocean)
- 21%
- Photic Zone Reduction (Depth)
- 9% of ocean saw over 50m reduction
