Overview
- A peer-reviewed study published Nov. 5, 2026 analyzed three satellite datasets and found a gradual brightening in blue and green wavelengths from 2002–2022 that produced a subtle cyan tint over the North Pacific gyre.
- Laboratory measurements and optical models by University of Bergen researchers show microplastic fragments scatter visible light strongly and could produce the observed blue–green signature at high concentrations.
- The authors stress the result is provisional because natural factors such as phytoplankton, dissolved organic matter, or mineral particles can sometimes produce similar color changes, so in‑situ optical measurements and microplastic counts in the patch are required.
- If field work confirms plastics are the cause, satellite detection could offer a faster, lower‑cost way to map high‑accumulation zones, but researchers say removing microscopic fragments from the water column is effectively impossible with current methods.
- The finding builds on earlier surveys that estimated the Great Pacific Garbage Patch holds around 1.8 trillion plastic pieces, mostly tiny fragments that are hard to sample and can enter the marine food web and human seafood supply.