The Great Pacific Garbage Patch may now have so much plastic, it’s changing the color of the ocean

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🗞️ Driving the news: Rising microplastic pollution may be changing the colour of the Great Pacific Garbage Patch, according to new research published in Communications Earth & Environment
• Analysis of satellite observations suggests that the waters between Hawaii and California have become noticeably brighter in blue and green wavelengths, potentially producing a cyan appearance linked to accumulating plastic fragments

🔭 The context: Researchers from the University of Bergen analysed satellite data covering 2002–2022 and used laboratory experiments and simulations to investigate possible causes
• Their findings suggest microplastics could explain the colour changes more convincingly than natural factors such as variations in phytoplankton
• However, scientists stress that direct measurements are still needed to establish whether plastics are responsible
• The research could eventually help detect microplastic concentrations remotely

🌍 Why it matters for the planet: Microplastics threaten marine ecosystems when ingested by wildlife, can carry pollutants through food chains and may interfere with the ocean's ability to transport and store carbon
• Better detection methods could improve understanding of the scale and distribution of ocean plastic pollution, supporting more targeted monitoring and action

⏭️ What’s next: Researchers plan to collect direct measurements from the Great Pacific Garbage Patch to verify the satellite findings
• If confirmed, the approach could be applied to other ocean regions with suspected high microplastic concentrations, potentially making monitoring faster and less costly than counting debris manually

💬 One quote: “If microplastics are accumulating at a level that’s actually altering the ocean’s color, that’s pretty alarming,” - study author Dan Koestner.

📈 One stat: Scientists estimate that up to 13 million metric tonnes of plastic enter the oceans annually, while only around 250,000 tonnes have been identified floating at the surface

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