The Great Pacific Garbage Patch (also Pacific trash vortex and North Pacific Garbage Patch) is a garbage patch, a gyre of marine debris particles, in the central North Pacific Ocean. It is located roughly from 135°W to 155°W and 35°N to 42°N.See the relevant sections below for specific references concerning the discovery and history of the patch. A general overview is provided in The collection of plastic and floating trash originates from the Pacific Rim, including countries in Asia, North America, and South America.
Despite the common public perception of the patch existing as giant islands of floating garbage, its low density () prevents detection by satellite imagery, or even by casual boaters or divers in the area. This is because the patch is a widely dispersed area consisting primarily of suspended "fingernail-sized or smaller"—often microscopic—particles in the upper water column known as microplastics.
Researchers from the Ocean Cleanup project claimed that the patch covers consisting of of plastic as of 2018, later growing to twice the size of Texas. By the end of 2024, the Ocean Cleanup had removed more than one million pounds of trash from the Great Pacific Garbage Patch, or 0.5% of the total accumulated trash. While microplastics dominate the area by count, 92% of the mass of the patch consists of larger objects. Some of the plastic is over 50 years old, and includes items (and fragments of items) such as "plastic lighters, toothbrushes, water bottles, pens, baby bottles, cell phones, plastic bags, and nurdles".
Research indicates that the patch is rapidly accumulating. The patch is believed to have increased "10-fold each decade" since 1945. The gyre contains approximately six pounds of plastic for every pound of plankton. A similar patch of floating plastic debris is found in the Atlantic Ocean, called the North Atlantic garbage patch.
History
The patch was predicted in a 1988 paper published by the National Oceanic and Atmospheric Administration (NOAA). The description was based on research by several Alaska-based researchers in 1988 who measured neustonic plastic in the North Pacific Ocean. Researchers found relatively high concentrations of marine debris accumulating in regions governed by ocean currents. Extrapolating from findings in the Sea of Japan, the researchers hypothesized that similar conditions would occur in other parts of the Pacific where prevailing currents were favorable to the creation of relatively stable waters. They specifically indicated the North Pacific Gyre."After entering the ocean, however, neuston plastic is redistributed by currents and winds. For example, plastic entering the ocean in Korea is moved eastward by the Subarctic Current (in Subarctic Water) and the Kuroshio (in Transitional Water, Kawai 1972; Favorite et al. 1976; Nagata et al. 1986). In this way, the plastic is transported from high-density areas to low-density areas. In addition to this eastward movement, Ekman stress from winds tends to move surface waters from the subarctic and the subtropics toward the Transitional Water mass as a whole (see Roden 1970: fig. 5). Because of the convergent nature of this Ekman flow, densities tend to be high in Transitional Water. Also, the generally convergent nature of water in the North Pacific Central Gyre (Masuzawa 1972) should result in high densities there also." (Day, et al. 1988, p. 261) (Emphasis added)
Charles J. Moore, returning home through the North Pacific Gyre after competing in the Transpacific Yacht Race in 1997, claimed to have come upon an enormous stretch of floating debris. Moore alerted the oceanographer Curtis Ebbesmeyer, who subsequently dubbed the region the "Eastern Garbage Patch" (EGP). The area is frequently featured in media reports as an exceptional example of marine pollution.
The JUNK Raft Project was a 2008 trans-Pacific sailing voyage made to highlight the plastic in the patch, organized by the Algalita Marine Research Foundation.
In 2009, two project vessels from Project Kaisei/Ocean Voyages Institute, the New Horizon and the Kaisei, embarked on a voyage to research the patch and determine the feasibility of commercial scale collection and recycling. The Scripps Institute of Oceanography's 2009 SEAPLEX expedition in part funded by Ocean Voyages Institute/Project Kaisei also researched the patch. Researchers were also looking at the impact of plastic on mesopelagic fish, such as lanternfish. Alt URL
In 2010, Ocean Voyages Institute conducted a 30-day expedition in the gyre which continued the science from the 2009 expeditions and tested prototype cleanup devices.
In July/August 2012 Ocean Voyages Institute conducted a voyage from San Francisco to the Eastern limits of the North Pacific Gyre north, (ultimately ending in Richmond British Columbia) and then made a return voyage which also visited the Gyre. The focus on this expedition was surveying the extent of tsunami debris from the Japanese earthquake-tsunami.
Sources of the plastic
In 2015, a study reported that the debris floats eastward out of Asian countries primarily from six countries: China, Indonesia, the Philippines, Vietnam, Sri Lanka and Thailand. The study – which used data as of 2010 – indicated that China was responsible for approximately 30% of plastic ocean pollution. In 2017, the Ocean Conservancy reported that China, Indonesia, Philippines, Thailand, and Vietnam dump more plastic in the sea than all other countries combined. Efforts to slow land generated debris and consequent marine debris accumulations have been undertaken by the Coastal Conservancy, Earth Day, Ocean Cleanup, and World Cleanup Day.
According to a 2019 study, "80 percent of plastic in the ocean is estimated to come from land-based sources, with the remaining 20 percent coming from boats and other marine sources. These percentages vary by region, however. A 2018 study reported that synthetic fishing nets made up nearly half the mass of the Great Pacific garbage patch, largely due to ocean current dynamics and increased fishing activity in the Pacific Ocean."
A 2022 study reported that 75% up to 86% of the plastic pollution is from fishing and agriculture with most identified emissions originating from Japan, China, South Korea, the US, and Taiwan. A 2020 study reported the U.S. as the third-largest contributor of plastic pollution in coastal environments. In 2018, China banned plastic imports. Thereafter, countries with poor waste management systems, such as Indonesia, became dumping grounds for plastic that originated in the US.
The study analysed 6,093 debris items greater than 5 cm found in the North Pacific garbage patch, of which 99% of the rigid items by count that represented 90% of the total debris mass (514 kg) were plastics. These were later sorted, counted, weighed and their sources traced back to five industrialised fishing nations, suggesting the important role the fishing industry plays in global plastic waste.
Predominantly, the composition of the hard plastic waste includes unidentifiable fragments, fishing and aquaculture gear such as nets, fish boxes, oyster spacers, and eel traps and other plastic items associated with food, drinks and household items. They also represent a substantial amount of accumulated floating plastic mass.
The 201 plastic objects analysed carried language writings with the most common languages identified as Chinese, Japanese, English and Korean, in that order.
The Ocean Cleanup estimated that as much as 86% of the plastics are from fishing activity.
Constitution
The Great Pacific Garbage Patch formed gradually as a result of ocean or marine pollution gathered by ocean currents.For this and what follows, see For gyres generally, see It occupies a relatively stationary region of the North Pacific Ocean bounded by the North Pacific Gyre in the horse latitudes. The gyre's rotational pattern draws in waste material from across the North Pacific, incorporating coastal waters off North America and Japan. As the material is captured in the currents, wind-driven surface currents gradually move debris toward the center, trapping it.
In a 2014 study researchers sampled 1571 locations throughout the world's oceans and determined that discarded fishing gear such as buoys, lines and nets accounted for more than 60% of the mass of plastic marine debris. According to a 2011 EPA report, "The primary source of marine debris is the improper waste disposal or management of trash and manufacturing products, including plastics (e.g., littering, illegal dumping) ... Debris is generated on land at marinas, ports, rivers, harbors, docks, and storm drains. Debris is generated at sea from fishing vessels, stationary platforms, and cargo ships." Constituents range in size from miles-long abandoned fishing nets to micro-pellets used in cosmetics and abrasive cleaners.
A computer model predicts that a hypothetical piece of debris from the U.S. west coast would head for Asia, and return to the U.S. in six years; debris from the east coast of Asia would reach the U.S. in a year or less. While microplastics make up 94% of the estimated 1.8 trillion plastic pieces, they amount to only 8% of the of plastic there, with most of the rest coming from the fishing industry.
A 2017 study concluded that of the of plastic produced since 1950, close to are no longer in use. The authors estimate that 9% was recycled, 12% was incinerated, and the remaining are in the oceans and land.
Animals In a 2021 study, researchers who examined plastic from the patch identified more than 40 animal species on 90 percent of the debris they studied. Discovery of a thriving ecosystem of life at the Great Pacific garbage patch in 2022 suggested that cleaning up garbage here may adversely remove this plastisphere.
A 2023 study found that the plastic is home to coastal species surviving in the open ocean and reproducing. These coastal species, including jellyfish and sponges, are commonly found in the western Pacific coast and are surviving alongside open-ocean species on the plastic. Some scientists are concerned that this mix of coastal and open-ocean species may result in unnatural or "neopelagic communities," in which coastal creatures could be competing with or even consuming open-ocean species.
Size estimates The size of the patch is indefinite, as is the precise distribution of debris because large items are uncommon. Most debris consists of small plastic particles suspended at or just below the surface, evading detection by aircraft or satellite. Instead, the size of the patch is determined by sampling. The estimated size of the garbage patch is (about twice the size of Texas or three times the size of France). Such estimates, however, are conjectural given the complexities of sampling and the need to assess findings against other areas. Further, although the size of the patch is determined by a higher-than-normal degree of concentration of pelagic debris, there is no standard for determining the boundary between "normal" and "elevated" levels of pollutants to provide a firm estimate of the affected area.
In August 2009, the Scripps Institution of Oceanography/Project Kaisei SEAPLEX survey mission of the Gyre found that plastic debris was present in 100 consecutive samples taken at varying depths and net sizes along a path of through the patch. The survey found that, although the patch contains large pieces, it is on the whole made up of smaller items that increase in concentration toward the gyre's centre, and these 'confetti-like' pieces that are visible just beneath the surface suggests the affected area may be much smaller. Data collected in 2009 from Pacific albatross populations suggest the presence of two distinct debris zones.