Beyond the Absurdity of a Texas-Sized Garbage Patch: The Global Menace of Plastic Pollution
By Marcus Eriksen
Media is sometimes the tail that wags the dog of science. One oceanographer described finding plastic in his relatively tiny Texas-size study area of the North Pacific Ocean, while another began describing these areas of concentration as “garbage patches”. A mis-information frenzie birthed a mis-conception of an island of trash. Hurry, someone plant a flag – sell real estate! Disappointing to the entrepreneurial spirit that aimed to fix it for a fee, there are no such islands. They do not exist. Having traveled 20,000 miles across 4 of the 5 subtropical gyres, returning from crossing the South Atlantic Gyre in December 2010, I assure you that reality is much worse.
It’s a patchy patch. In 1999 Captain Charles Moore, founder of the Algalita Marine Research Foundation based in Long Beach, CA, published an observed 6:1 weight ratio of plastic to plankton in the swirling center of the North Pacific Subtropical Gyre. I joined him in 2005 and 2008 to the same region. In this decade of research, the foundation was heavily criticized by other oceanographers for quantifying plastic this way. What was hidden in this criticism was the fact that the science of Oceanography was caught off guard. No one knew of this plastic plague on the world’s oceans, until a Long Beach surfer/sailor turned scientist made it known. It is true that plankton is extremely variable, and can bloom and dissipate with the season, temperature, moonlight, and a dozen other variables, therefore the margin of error is huge. But the plastic/plankton ratio serves a good anecdote for relative abundance of plastic to available food for scavenging fish and filter feeders, like from jellies to baleen whales. So, it’s important to describe plastic to plankton ratios as an anecdote, but not worth quantifying.
1999 was not the first time scientist studied plastic pollution in the ocean. Thor Heyerdal observed plastic in 1969 crossing the North Atlantic on Ra I. Two years later Edward Carpenter, from Woods Hole Oceanographic Institution, netted pellets and fragments of plastic pollution between the east coast and Bermuda. Plastic pollution in the North Pacific Gyre was first described by Robert Day in 1989 near the coast of Japan, and in the South Atlantic Gyre near Cape Town, South Africa in 1980 by Robert Morris of the Institute of Oceanographic Science in the UK. It was a quiet, poorly-understood menace that palled in significance and interest to oceanographers. Then the story broke about an island of plastic, with sensationalized accounts beyond science, mythological masses of synthetic detritus, an illusive terra aqua.
“Somebody do something,” cried the ocean advocates, artists, celebrities and politicians. And the scientists followed. Media called them to action. But not before the industrialists. A problem precedes a solution ready to sell. Groups with little or no experience at sea rose to the occasion with fanciful technofixes, contraptions of grandeur, robotic vagabonds to sieve the sea in solitude and bring the trash back to land, or parachutes that spin sickle-shaped islands that net plastic pollution in their path. All have failed, realizing that going to the ocean to remove floating plastic particles is like standing on the top of a skyscraper with a vacuum cleaner to remove air pollution. It’s not impossible, just impractical. There is no island to retrieve. We have run expeditions across the North Pacific Gyre, North Atlantic Gyre, Indian Ocean Gyre, and in December 2010 we crossed the South Atlantic Gyre. We found plastic in every surface trawl, in varying concentrations. Imagine a handful of degraded plastic confetti spread across a football field of the ocean surface. That’s as thick as it gets, but it’s everywhere. It’s a think plastic soup over 2/3rds of the earth’s surface. So far the 5 Gyres Institute has traveled to 4 of the 5 subtropical gyres in the world, conducting over 400 surface trawls, with plastic in every one. That is the menace of plastic pollution. It’s everywhere, thinly distributed, and extremely impractical to clean up at sea.
But if no one cleans it up, will the garbage patches keep growing? No. Studies in the North Atlantic Gyre and North Pacific Gyre have been repeated with interesting results. There’s no massive trend in plastic accumulation over time. Kara Lavender Law, of Sea Education, compiled data from 22 years of data from the North Atlantic Gyre, the same area that Carpenter studied 3
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