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Title

The Arctic Ocean as a dead end for floating plastics in the North Atlantic branch of the Thermohaline Circulation

AuthorsCózar, Andrés; Martí, Elisa ; Duarte, Carlos M. ; García de Lomas, Juan; van Sebille, E.; Ballatore, Thomas J.; Eguíluz, Víctor M. ; González-Gordillo, J. Ignacio; Pedrotti, M.L.; Echevarría, Fidel; Troublè, Romain; Irigoien, Xabier
KeywordsArctic waters
North Atlantic
Floating plastic debris
Thermohaline circulation
Issue Date5-Apr-2017
PublisherAmerican Association for the Advancement of Science
CitationScience Advances 3(4): e1600582 (2017)
AbstractThe subtropical ocean gyres are recognized as great marine accummulation zones of floating plastic debris; however, the possibility of plastic accumulation at polar latitudes has been overlooked because of the lack of nearby pollution sources. In the present study, the Arctic Ocean was extensively sampled for floating plastic debris from the Tara Oceans circumpolar expedition. Although plastic debris was scarce or absent in most of the Arctic waters, it reached high concentrations (hundreds of thousands of pieces per square kilometer) in the northernmost and easternmost areas of the Greenland and Barents seas. The fragmentation and typology of the plastic suggested an abundant presence of aged debris that originated from distant sources. This hypothesis was corroborated by the relatively high ratios of marine surface plastic to local pollution sources. Surface circulation models and field data showed that the poleward branch of the Thermohaline Circulation transfers floating debris from the North Atlantic to the Greenland and Barents seas, which would be a dead end for this plastic conveyor belt. Given the limited surface transport of the plastic that accumulated here and the mechanisms acting for the downward transport, the seafloor beneath this Arctic sector is hypothesized as an important sink of plastic debris.
Publisher version (URL)https://doi.org/10.1126/sciadv.1600582
URIhttp://hdl.handle.net/10261/174104
DOI10.1126/sciadv.1600582
E-ISSN2375-2548
Appears in Collections:(IFISC) Artículos
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