Overview
- Researchers at the University of Bergen combined lab optics, 20 years of satellite imagery and computer simulations to identify a brighter blue-green spectral signature inside the Great Pacific Garbage Patch that matches microplastic particles.
- Laboratory tests used shredded plastic “smoothies” to measure how microplastics scatter light and to build a spectral fingerprint that the team searched for in satellite data.
- Simulations showed that adding plastics to models made the observed cyan shift far more likely than changes driven only by natural factors such as phytoplankton.
- Authors stress the result is not yet proven and call for targeted, ship-based sampling in the Garbage Patch to directly measure microplastic concentrations and validate the satellite interpretation.
- If validated, the method could give scientists a faster, lower-cost way to map hard-to-detect microplastics, help resolve the ocean’s 'missing plastic' problem, and improve assessments of ecological and carbon-cycle risks tied to microplastic buildup.