The Great Pacific Garbage Patch Is Growing
And it was already enormous
27
March, 2018
What’s
1.6 million square kilometers, weighs 80,000 metric tons, and is
three times the size of continental France?
That
would be the Great Pacific Garbage Patch—the enormous collection of
detritus that floats in the Pacific Ocean, halfway between Hawaii and
California. Also known as the “GPGP,” the patch’s sprawl has
made it notoriously difficult to measure. But a new study published
last Thursday in the journal Scientific Reports has gathered the most
comprehensive measurement yet. After three years of data collection,
researchers from the Ocean Cleanup—a Dutch nonprofit that works on
developing technologies to scrub the oceans—have calculated that
the patch is four to sixteen times larger than ever before
determined—and it’s growing.
“This
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,” Laurent Lebreton, the lead
author of the study, told Science Daily.
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—the same kind used by
self-driving cars—to 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—as was
widely believed back in the 90s—nor a massive swirl of
confetti-sized pieces of plastic, as has been widely reported since.
Instead, it’s what Mother Nature Network’s Russell McLendon has
called a “galaxy of garbage,” 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 “microplastics”—fragments
smaller than 5 millimeters.
“We
were surprised by the amount of large plastic objects we
encountered,” Julia Reisser, chief scientist of the expeditions,
told Science Daily. “We 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.”
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—that is, great whirlpools where
currents collide—in the North and South Atlantic, the North and
South Pacific, and the Indian Ocean have become filled with garbage.
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’t just unsightly: It poses threats to marine
life and it has health and economic implications for humans as well.
According to the 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’s 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.
Dead whale found in Thailand with 17 pounds of plastic in its stomach
Volunteers
and marine veterinarians from Department of Marine and Coastal
Resources attempted to rescue a sick male pilot whale in the coastal
area of southern Thailand near the Malaysian border, 28 May 2018.
Photo: ThaiWhales / AFP / Getty Images
3
June, 2018
BANGKOK,
3 June 2018 (Reuters) – Some 80 pieces of plastic rubbish weighing
17 pounds were found in the stomach of a whale that died in Thailand
after a five-day effort to save it, a marine official said on Sunday.
The
pilot whale was discovered on Monday in a canal in the southern
province of Songkhla and received treatment from a team of
veterinarians.
The
whale spit out five plastic bags on Friday and later died, the Marine
and Coastal Resources Department said on its website.
An
autopsy found another 80 bags and other plastic items weighing more
than 17 pounds (8 kg) in the whale’s stomach.
“This
plastic rubbish made the whale sick and unable to hunt for food,”
the department said.
Jatuporn
Buruspat, head of the department, said the whale probably thought the
floating plastic bags were food. […]
A
government marine veterinarian is being helped by volunteers to
remove plastics from the stomach of dead male pilot whale at the
Marine and Coastal Resource Research and Development Center in
Songkla province, Thailand, 1 June 2018. Photo: ThaiWhales / AFP /
Getty Images
Globally,
eight million tons of plastic — bottles, packaging and other waste
— are dumped into the ocean every year, killing marine life and
entering the human food chain, the United Nations Environment
Programme said in December. [more]
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