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The fate of plastics entering the 3D ocean circulation from rivers discharge is examined through the Lagrangian analysis of neutrally buoyant particles. Particles are released continuously over 1991-2010 at the surface along the coasts according to monthly estimates of rivers plastic waste input. They are advected by daily currents from a state-of-the-art global ocean model at 1/12° resolution. At the end of the simulation, particles remaining in the surface layer of 1~m thickness represent less than 2\% of the total particles released. These are concentrated in the center of subtropical ...

Vicki Beaver / Alamy Polyester fibres make up nearly three-quarters of microplastic pollution in the Arctic and probably come from textile manufacturing and household laundry. We already knew that microplastics are present in the Arctic, but new research shines a light on the source of these tiny fragments. Peter Ross at the University of British Columbia in Canada and his colleagues examined seawater samples from 71 locations across the Arctic taken from 3 to 8 metres below the surface. Advertisement Microplastics were present in all samples except one, with a count of approximately 40 micro...