There is a pooling of plastic waste that floats in the ocean between California and Hawaii. It’s known as the “great Pacific garbage patch.” This garbage patch spreads over 1.6 million square kilometers (600,000 square miles), a new study finds. And it contains at least 79,000 tons of material. That’s the equivalent to the mass of more than 6,500 school buses. The new numbers mean the hoard is four to 16 times as massive as past estimates had suggested.
Its name might imply a huge floating island of junk. This garbage patch is something else. It’s an area of the ocean where pieces of plastic can be found in high concentration. About 1.8 trillion plastic pieces make up the great Pacific garbage patch, scientists estimate. About 94 percent of the pieces are microplastics. These are particles smaller than half a centimeter (0.2 inch). Because they are so tiny, they make up only 8 percent of the overall mass. Large pieces, 5 to 50 centimeters (2 to 20 inches), account for 25 percent of the mass. Extra-large bits, those bigger than 50 centimeters (20 inches), make up the most of the mass: 53 percent.
Aerial photos provided the best tallies of the larger plastic pieces, the researchers note. That might explain why the new estimates are so much higher. Those older ones had relied on images taken from boats and data on ocean trawling — in addition to estimates from computer models.
But there’s also another potential explanation: The patch could have grown. It may have received a hue increase of debris from the 2011 tsunami that hit Japan and washed trash out to sea.
