Multiple outlets report that the waters near the Great Pacific Garbage Patch—an area of debris accumulation in the Pacific—have grown brighter in blue and green wavelengths over the past two decades. The change is detected using satellite observations comparing the patch with surrounding regions, covering roughly 2002 to 2022.
Scientific American and a report relayed by Slashdot say researchers interpret the brighter hues as consistent with the effects microplastics could have on ocean color. However, the studies described do not definitively prove that microplastics directly cause the shift, and investigators note that without direct ocean sampling, other factors could contribute. Slashdot adds that lab experiments support the plausibility of microplastics influencing color, but confirming causation would require on-site verification.
Phys.org provides broader context by framing the Great Pacific Garbage Patch as part of a larger problem of microplastic pollution accumulating in ocean waters, without focusing on the new color-measurement evidence. Together, the coverage emphasizes both the observed optical change and the continuing uncertainty about its exact cause.
