A 3D ocean plastic problems For years, marine plastic researchers investigated the surface garbage patches concentrated by slow-moving gyres. Those rotating currents still host prodigious amounts of floating waste, but the new analysis shows that gyre dynamics do not stop at the surface.<\/p>\n \u201cYou\u2019ve got these accumulations on the surface, and the same processes concentrating and leading to accumulations below the gyres into a sort of lens,\u201d said senior author Aron Stubbins, a marine scientist at Northeastern.<\/p>\n The team combined plankton-net tows, in-line filtration, pump casts, and sediment traps collected between 2014 and 2024.<\/p>\n Most sites lay in the Northern Hemisphere\u2019s busy shipping lanes and coastal margins \u2013 regions with dense coastal populations and well-documented mismanaged waste.<\/p>\n Even so, researchers were surprised by the reach of plastic pollution<\/a>. \u201cPlastics are more or less everywhere,\u201d Stubbins said. \u201cWe\u2019re finding them deposited in the Antarctic, in the Himalayas, carried by the wind, but to find them well-distributed throughout the ocean is surprising.\u201d<\/p>\n Heavy plastics don\u2019t always sink<\/p>\n Buoyant polymers such as polyethylene and polypropylene naturally ride the waves. Denser resins, including polyethylene terephthalate (PET) from water bottles, should in theory fall quickly to the seabed. Yet PET showed up at multiple mid-water depths.<\/p>\n \u201cOne rationale is that when something is small enough, its density becomes less important than its drag,\u201d Stubbins noted. <\/p>\n In other words, once abrasion, UV exposure, and microbial attack whittle a bottle fragment into a sub-100-micron shard, turbulent eddies can keep it aloft for months or years.<\/p>\n The survey found microplastics<\/a> in all studied size classes, but concentrations peaked below 20 microns. Particles in this range behave almost like mineral dust in air: they scatter sunlight, adsorb chemicals efficiently, and are easily inhaled \u2013 by plankton<\/a> in this case, rather than people.<\/p>\n Ripples through the food web<\/p>\n Tiny plankton form the base of marine food chains<\/a>, fueling everything from larval fish to baleen whales.<\/p>\n Laboratory studies show that copepods and krill readily ingest micro- and nanoplastics, mistaking them for nutritious algae. Field data remain sparse, but the scientists warn that real-world exposure may be higher than previously estimated.<\/p>\n \u201cIn terms of the food chain, there could be interaction,\u201d Stubbins said. \u201cOrganisms could be feeding in these zones and ingesting these plastics and also the toxic passenger molecules they carry, which could distribute into fish tissue, and we end up consuming them.\u201d<\/p>\n Plastic particles act as rafts for organic pollutants, trace metals, and pathogenic microbes, meaning that a single 10-micron bead can deliver a chemical cocktail to any predator that swallows it. <\/p>\n The long-distance drift documented in the new study therefore multiplies the potential contact between pollutants and wildlife.<\/p>\n Plastics may trap carbon<\/p>\n Beyond contamination concerns, the authors highlight a subtler risk. Each year, the ocean pumps roughly a quarter of humanity\u2019s carbon-dioxide emissions from the surface into the abyss. This happens chiefly via plankton that fix CO\u2082 and sink as aggregates or fecal pellets.<\/p>\n Plastic fragments of similar size and density could change how easily that biological \u201csnow\u201d sinks \u2013 or provide ballast that speeds some material downward while trapping carbon shallower than usual.<\/p>\n \u201cPlastics may reduce the ocean\u2019s ability to offset carbon dioxide<\/a>,\u201d Stubbins said. A new $1.3-million National Science Foundation<\/a> project will probe that possibility by pairing vertical plastic profiles with carbon-flux measurements.<\/p>\n Documenting surface litter is straightforward: satellites, drones, and ships can skim the top meter with nets. Deep-water plastic work, by contrast, relies on expensive equipment and painstaking lab protocols.<\/p>\n The Northeastern team calls for an international push to harmonize depth-integrated sampling \u2013 particle size cuts, filtration volumes, and contamination controls. Standardizing these methods would allow global maps to be stitched together without relying on statistical guesswork.<\/p>\n \u201cPlastics is an emergent field and there are concerns about how the changing physical environment of the deep ocean may have impacts on how the ocean functions as part of the Earth\u2019s system,\u201d Stubbins explained.<\/p>\n The long life of ocean plastic<\/p>\n Some countries are drafting binding treaties to curb plastic production and improve waste management. Yet even if global discharge stopped tomorrow, trillions of microplastics already in circulation would continue to drift, fragment, and sink to the bottom of the ocean for decades.<\/p>\n The new study provides a benchmark against which future surveys can measure progress \u2013 or lack thereof.<\/p>\n Policy, meanwhile, will need to target both ends of the life cycle: cutting single-use plastics at the source and investing in technologies to capture or biodegrade microplastics before they reach open water.<\/p>\n Until then, the ocean\u2019s newly revealed plastic smog will remain a silent passenger in planetary processes that sustain climate stability and human food security<\/a>.<\/p>\n The study is published in the journal Nature<\/a>.<\/p>\n \u2014\u2013<\/p>\n Like what you read? Subscribe to our newsletter<\/a> for engaging articles, exclusive content, and the latest updates.\u00a0<\/p>\n Check us out on EarthSnap<\/a>, a free app brought to you by Eric Ralls<\/a> and Earth.com.<\/p>\n \u2014\u2013<\/p>\n","protected":false},"excerpt":{"rendered":"A ten-year, nearly 2,000-station ocean survey has uncovered a diffuse veil of plastics drifting through every sampled layer…\n","protected":false},"author":2,"featured_media":194709,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3843],"tags":[728,70,16,15],"class_list":{"0":"post-194708","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-environment","8":"tag-environment","9":"tag-science","10":"tag-uk","11":"tag-united-kingdom"},"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@uk\/114705051435267942","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/posts\/194708","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/comments?post=194708"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/posts\/194708\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/media\/194709"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/media?parent=194708"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/categories?post=194708"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/tags?post=194708"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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