I've known rivers:
I've known rivers ancient as the world and older than the flow
of human blood in human veins.
My soul has grown deep like the rivers.
I bathed in the Euphrates when dawns were young.
I built my hut near the Congo and it lulled me to sleep.
I looked upon the Nile and raised the pyramids above it.
I heard the singing of the Mississippi when Abe Lincoln went
down to New Orleans, and I've seen its muddy bosom turn
all golden in the sunset.
I've known rivers:
Ancient, dusky rivers.
My soul has grown deep like the rivers.
-- Langston Hughes

The World’s Rubbish Dump: A Garbage Tip That Stretches From Hawaii to Japan

by Kathy Marks and Daniel Howden
A “plastic soup” of waste floating in the Pacific Ocean is growing at an alarming rate and now covers an area twice the size of the continental United States, scientists have said.The vast expanse of debris - in effect the world’s largest rubbish dump - is held in place by swirling underwater currents. This drifting “soup” stretches from about 500 nautical miles off the Californian coast, across the northern Pacific, past Hawaii and almost as far as Japan.

Charles Moore, an American oceanographer who discovered the “Great Pacific Garbage Patch” or “trash vortex”, believes that about 100 million tons of flotsam are circulating in the region. Marcus Eriksen, a research director of the US-based Algalita Marine Research Foundation, which Mr Moore founded, said yesterday: “The original idea that people had was that it was an island of plastic garbage that you could almost walk on. It is not quite like that. It is almost like a plastic soup. It is endless for an area that is maybe twice the size as continental United States.”

Curtis Ebbesmeyer, an oceanographer and leading authority on flotsam, has tracked the build-up of plastics in the seas for more than 15 years and compares the trash vortex to a living entity: “It moves around like a big animal without a leash.” When that animal comes close to land, as it does at the Hawaiian archipelago, the results are dramatic. “The garbage patch barfs, and you get a beach covered with this confetti of plastic,” he added.

The “soup” is actually two linked areas, either side of the islands of Hawaii, known as the Western and Eastern Pacific Garbage Patches. About one-fifth of the junk - which includes everything from footballs and kayaks to Lego blocks and carrier bags - is thrown off ships or oil platforms. The rest comes from land.

Mr Moore, a former sailor, came across the sea of waste by chance in 1997, while taking a short cut home from a Los Angeles to Hawaii yacht race. He had steered his craft into the “North Pacific gyre” - a vortex where the ocean circulates slowly because of little wind and extreme high pressure systems. Usually sailors avoid it.

He was astonished to find himself surrounded by rubbish, day after day, thousands of miles from land. “Every time I came on deck, there was trash floating by,” he said in an interview. “How could we have fouled such a huge area? How could this go on for a week?”

Mr Moore, the heir to a family fortune from the oil industry, subsequently sold his business interests and became an environmental activist. He warned yesterday that unless consumers cut back on their use of disposable plastics, the plastic stew would double in size over the next decade.

Professor David Karl, an oceanographer at the University of Hawaii, said more research was needed to establish the size and nature of the plastic soup but that there was “no reason to doubt” Algalita’s findings.

“After all, the plastic trash is going somewhere and it is about time we get a full accounting of the distribution of plastic in the marine ecosystem and especially its fate and impact on marine ecosystems.”

Professor Karl is co-ordinating an expedition with Algalita in search of the garbage patch later this year and believes the expanse of junk actually represents a new habitat. Historically, rubbish that ends up in oceanic gyres has biodegraded. But modern plastics are so durable that objects half-a-century old have been found in the north Pacific dump. “Every little piece of plastic manufactured in the past 50 years that made it into the ocean is still out there somewhere,” said Tony Andrady, a chemist with the US-based Research Triangle Institute.

Mr Moore said that because the sea of rubbish is translucent and lies just below the water’s surface, it is not detectable in satellite photographs. “You only see it from the bows of ships,” he said.

According to the UN Environment Programme, plastic debris causes the deaths of more than a million seabirds every year, as well as more than 100,000 marine mammals. Syringes, cigarette lighters and toothbrushes have been found inside the stomachs of dead seabirds, which mistake them for food.

Plastic is believed to constitute 90 per cent of all rubbish floating in the oceans. The UN Environment Programme estimated in 2006 that every square mile of ocean contains 46,000 pieces of floating plastic,

Dr Eriksen said the slowly rotating mass of rubbish-laden water poses a risk to human health, too. Hundreds of millions of tiny plastic pellets, or nurdles - the raw materials for the plastic industry - are lost or spilled every year, working their way into the sea. These pollutants act as chemical sponges attracting man-made chemicals such as hydrocarbons and the pesticide DDT. They then enter the food chain. “What goes into the ocean goes into these animals and onto your dinner plate. It’s that simple,” said Dr Eriksen.

© 2008 The Independent

  

Save Our Shores

Science Of Shores

Eh Bruddahs and Sistahs, Da Rubbish keeps piling up on the beaches and in da sea...

Mai 'Opala, Pack Your Trash

Shores, Streams, Rivers Creeks, and Puddles...

Wherever the water is it flows to sea, or it evaporates into the air and makes it to the sea eventually.

 
THE GREAT PACIFIC
GARBAGE ISLAND!
 

Around 100 million tons of plastic are produced each year of which about 10 percent ends up in the sea. About 20 percent of this is from ships and platforms, the rest from land.

Take a walk along any beach anywhere in the world and washed ashore will be many polythene plastic bags, bottles and containers, plastic drums, expanded polystyrene packing, polyurethane foam pieces, pieces of polypropylene fishing net and discarded lengths of rope. Together with traffic cones, disposable lighters, vehicle tires and toothbrushes, these items have been casually thrown away on land and at sea and have been carried ashore by wind and tide.

These larger items are the visible signs of a much larger problem. These big items do not degrade like natural materials. At sea and on shore under the influence of sunlight, wave action and mechanical abrasion they simply break down slowly  into ever smaller particles.  

A single one liter drinks bottle could break down into enough small fragments to put one on every mile of beach in the entire world. These smaller particles are joined by the small pellets of plastic which are the form in which many new plastics are marketed and which can be lost at sea by the drumload or even a whole container load.  These modern day “marine tumbleweeds” have been thrown into sharp focus, not only by the huge quantities removed from beaches by dedicated volunteers, but by the fact that they have been found to accumulate in sea areas where winds and currents are weak.

The “Eastern Garbage Patch”

The North Pacific sub-tropical gyre covers a large area of the Pacific in which the water circulates clockwise in a slow spiral. Winds are light. The currents tend to force any floating material into the low energy central area of the gyre. There are few islands on which the floating material can beach. So it stays there in the gyre, in astounding quantities estimated at six kilos of plastic for every kilo of naturally occurring plankton.  The equivalent of an area the size of Texas swirling slowly around like a clock. This gyre has also been dubbed “the Asian Trash Trail” the “Trash Vortex” or the “Eastern Garbage Patch”.

This perhaps wouldn’t be too much of a problem if the plastic had no ill effects. The larger items, however, are consumed by seabirds and other animals which mistake them for prey. Many seabirds and their chicks have been found dead, their stomachs filled with medium sized plastic items such as bottle tops, lighters and balloons. A turtle found dead in Hawaii had over a thousand pieces of plastic in its stomach and intestines. It has been estimated that over a million sea-birds and one hundred thousand marine mammals and sea turtles are killed each year by ingestion of plastics or entanglement.

Animals can become entangled in discarded netting and line. Even tiny jelly-fish like creatures become entangled in lengths of plastic filament, or eat the small plastic particles floating in the water.0205 05

 

 

 

 

 

 

Chemical sponge

There is a sinister twist to all this as well. The plastics can act as a sort of “chemical sponge”. They can concentrate many of the most damaging of the pollutants found in the worlds oceans: the persistent organic pollutants (POPs).  So any animal eating these pieces of plastic debris will also be taking in highly toxic pollutants.

The North Pacific gyre is one of five major ocean gyres and it is possible that this Trash Vortex problem is one which is present in other oceans as well. The Sargasso Sea is a well known slow circulation area in the Atlantic, and research there has also demonstrated high concentrations of plastic particles present in the water.

Ocean hitchhikers

The floating plastics can also affect marine ecosystems in a surprising way, by providing a ready surface for organisms to live on. These plants and animals can then be transported on the plastic far outside their normal habitat. These ocean hitch-hikers can then invade new habitats to become possible nuisance species.

Of course, not all plastic floats. In fact around 70 percent of discarded plastic sinks to the bottom. In the North Sea, Dutch scientists have counted around 110 pieces of litter for every square kilometer of the seabed, a staggering 600,000 tonnes in the North Sea alone. These plastics can smother the sea bottom and kill the marine life which is found there.

The issue of plastic debris is one that needs to be urgently addressed. At the personal level we can all contribute by avoiding plastics in the things we buy and by disposing of our waste responsibly. Obviously though, there is a need to make ship owners and operators, offshore platforms and fishing boat operators more aware of  the consequences of irresponsible disposal of plastic items. 
 
Adapted from Greenpeace

 

 
Your comments or Questions to Save Our Seas.

Go back to Save Our Seas Home Page

JOIN SOS

 

Postal address: Save Our Seas P.O. Box 813, Hanalei, HI 96714 Telephone: (808) 651-3452