{"id":8419,"date":"2018-04-20T12:39:38","date_gmt":"2018-04-20T19:39:38","guid":{"rendered":"http:\/\/occupysf.net\/?p=8419"},"modified":"2018-04-20T12:49:11","modified_gmt":"2018-04-20T19:49:11","slug":"the-great-pacific-garbage-patch-is-growing","status":"publish","type":"post","link":"http:\/\/occupysf.net\/index.php\/2018\/04\/20\/the-great-pacific-garbage-patch-is-growing\/","title":{"rendered":"The Great Pacific Garbage Patch Is Growing"},"content":{"rendered":"
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\"Plastic<\/picture>
Plastic waste lies among other debris washed ashore on a beach in Sri Lanka.<\/span>\u00a0Gemunu Amarasinghe\/AP<\/span><\/em><\/figcaption>
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By ALASTAIR BOONE<\/a><\/p>\n

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What\u2019s 1.6 million square kilometers, weighs 80,000 metric tons, and is three times the size of continental France?<\/p>\n

That would be the Great Pacific Garbage Patch\u2014the enormous collection of detritus that floats in the Pacific Ocean, halfway between Hawaii and California. Also known as the \u201cGPGP,\u201d the patch\u2019s sprawl has made it notoriously difficult to measure. But a\u00a0new study<\/a>published last Thursday in the journal\u00a0Scientific Reports<\/em>\u00a0has gathered the most comprehensive measurement yet. After three years of data collection, researchers from\u00a0the Ocean Cleanup<\/a>\u2014a Dutch nonprofit that works on developing technologies to scrub the oceans\u2014have calculated that the patch is four to sixteen times larger than ever before determined\u2014and it\u2019s growing.<\/p>\n

\u201cThis plastic accumulation rate inside the GPGP, which was greater than in the surrounding waters, indicates that the inflow of plastic into the patch continues to exceed the outflow,\u201d Laurent Lebreton, the lead author of the study, told\u00a0Science Daily<\/em><\/a>.<\/em><\/p>\n

Since scientists started measuring the patch in the 1970s, they have typically used fine-meshed nets to trawl the accumulation zone. But these nets are not large enough to capture clusters of bigger garbage. To overcome this problem, the researchers outfitted a C-130 Hercules aircraft with LiDAR sensors\u2014the same kind used by self-driving cars\u2014to take 3D scans of the garbage, allowing them to capture images of both floating and submerged trash, as well as very large pieces of plastic, such as meters-wide fishing nets. Using this method, the researchers counted 1.8 trillion pieces of plastic floating in the accumulation zone, and collected 1.2 million plastic samples that they brought back to the lab to study, one by one.When they did, they learned something new about the makeup of the patch. The GPGP it is neither a giant floating island of garbage\u2014as was widely believed back in the 90s\u2014nor a massive swirl of confetti-sized pieces of plastic, as has been widely reported since. Instead, it\u2019s what\u00a0Mother Nature Network<\/em>\u2019s Russell McLendon\u00a0has called<\/a>\u00a0a \u201cgalaxy of garbage,\u201d composed of a network of plastic, large and small. A full 92 percent of the mass is comprised of larger objects, while only 8 percent is made up of \u201cmicroplastics\u201d\u2014fragments smaller than 5 millimeters.\u201cWe were surprised by the amount of large plastic objects we encountered,\u201d Julia Reisser, chief scientist of the expeditions, told\u00a0Science Daily<\/a>.\u00a0<\/em>\u201cWe used to think most of the debris consists of small fragments, but this new analysis shines a new light on the scope of the debris.\u201d<\/p>\n

But how did the patch get here in the first place, and why is it getting bigger? In short: human thoughtlessness and fluid mechanics. Over the years, five large mega-gyres\u2014that is, great whirlpools where currents collide\u2014in the North and South Atlantic, the North and South Pacific, and the Indian Ocean\u00a0have become filled with garbage<\/a>. A plastic cup tossed on a San Francisco street will wend its way to the sea via storm drain, and then journey to the nearest gyre, where it will join trillions of other artifacts of human civilization.This plastic pollution isn\u2019t just unsightly: It poses threats to marine life and it has health and economic implications for humans as well.\u00a0According to<\/a>\u00a0the Ocean Cleanup, oceanic plastics enter the human food chain through a process called bioaccumulation, in which the chemicals in plastic can enter the bodies of sea life like fish and then later, the bodies of the predators who consume those fish. There\u2019s a significant economic impact, too: The UN has reported that ocean plastic pollution costs $13 billion every year through the likes of beach cleanups and financial loss incurred by fisheries.<\/p>\n

There are many schemes afoot to clean, or at least contain, ocean garbage patches: In 2015, Ocean Cleanup founder Boyan Slat proposed a\u00a062-mile floating wall<\/a>\u00a0that would catch garbage as it hugged the ocean\u2019s currents, and drifted out to sea. There\u2019s also\u00a0SeaBin<\/a>, a marine garbage can developed by two Australian surfers that sucks up trash and oil. But the challenge is enormous, given the scale of the affected areas. The researchers hope that this study will help the cause: It\u2019s easier to remove items when they are still in large pieces, before they break down into partially submerged microplastics.\u201cThese results allow us to further improve our cleanup technology,\u201d Slat said in\u00a0a video<\/a>\u00a0describing the impact of the team\u2019s new research. \u201cIt also gives us a baseline\u2026 while we clean up in the next few years we can continue to measure how much plastic is out there, and then compare it to the baseline and see how far we\u2019ve come.\u201d<\/section>\n

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About the Author<\/em><\/h4>\n
\"Alastair<\/picture><\/em><\/section>\n<\/section>\n
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Alastair Boone<\/a><\/em><\/h5>\n