An estimation of the average residence times and onshore-offshore diffusivities of beached microplastics based on the population decay of tagged meso- and macrolitter

Hinata, Hirofumi; Mori, Keita; Ohno, Kazuki; Miyao, Yasuyuki; Kataoka, Tomoya

doi:10.1016/j.marpolbul.2017.05.012

Cited by 82 publications

(60 citation statements)

References 34 publications

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“…An experiment was conducted on Wadahama Beach to study backwash process of plastics floats. The results showed that the backwashed floats tend to concentrate in the convergence zone under the effect of offshore currents and alongshore currents around the tidal flat [49]. At six estuarine sampling sites (Y1-Y6) on the shores of the Yangtze River, we found various mismanaged plastic waste, including plastic bottles, packaging materials and fishing nets, which may be due to the backwash of the Yangtze River.…”

Section: Distribution Characteristics Of Microplastics Around the Yanmentioning

confidence: 84%

Microplastics in surface water and sediments of Chongming Island in the Yangtze Estuary, China

Zheng

et al. 2020

Environ Sci Eur

155

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Background: The Yangtze Estuary acts as gateways where microplastics transport from freshwater into marine environments, with one of the largest discharge volumes in the world. The occurrence of microplastics in surface water and sediments of the Yangtze Estuary has been reported. However, little is known about microplastics in and around Chongming Island in the estuary. In this study, the distribution of microplastics in surface water and sediments of Chongming Island was investigated and compared in different environmental medium.Results: Abundances of microplastics in surface water and sediments were in the ranges of 0-259 items m − 3 and 10-60 items kg − 1 dry weight, respectively. Microplastics were more abundant in the surface water of the Yangtze River shores than in the inland rivers (p < 0.01). Proportions in fiber form in surface water and sediment were 33% and 67%; and those in fragment form were 39% and 24%. Most particles (> 72%) were < 1 mm in the longest dimension; 65% were white and 30% were transparent. Of the 11 compositions identified, polyethylene, polypropylene, and α-cellulose predominated in both phases.Conclusion: This is the first study to focus on microplastics in inland watercourses on Chongming Island and along the Yangtze River's shores in both phases. There were differences between the island and estuary in composition and density due to the distinct vertical mixing processes. The in situ filtration of surface water (100 L) sampling method was well employed in various freshwater environments and free of plastic materials in front of the filter, analysis results of which provided an important baseline reference for evaluating microplastic pollution in the Yangtze Estuary. Publisher's NoteSpringer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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Section: Distribution Characteristics Of Microplastics Around the Yanmentioning

confidence: 84%

Microplastics in surface water and sediments of Chongming Island in the Yangtze Estuary, China

Zheng

et al. 2020

Environ Sci Eur

155

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“…The wave asymmetry increases until the waves become unstable and eventually break. Particles with low settling velocity are recaptured by small eddies (with diameters of centimeters to meters) induced by swash waves and then transported seaward, while large particles with high settling velocities remain in the swash region (Hinata et al 2017). This obviously has impacts on the residence time of plastic close to the beach face.…”

Section: Coastal Currents Surface Waves and Beachingmentioning

confidence: 99%

“…Recently, it has been shown that the Lagrangian connectivity of nearshore flows depends strongly on the horizontal resolution of the underlying Eulerian hydrodynamic data (Dauhajre and McWilliams 2019). In particular, the simulation of beaching of virtual particles is mostly unexplored (Hinata et al 2017). Many Eulerian coastal flow models such as Delft3D (Lesser et al 2004) and X-Beach (Roelvink et al 2009) already include sediment transport; however, they are not ideal for simulating floating plastic because these models often do not adequately resolve surface processes such as wave breaking.…”

Section: Numerical Simulationsmentioning

confidence: 99%

The physical oceanography of the transport of floating marine debris

Sebille

Aliani

Law

et al. 2020

Environ. Res. Lett.

612

267

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Marine plastic debris floating on the ocean surface is a major environmental problem. However, its distribution in the ocean is poorly mapped, and most of the plastic waste estimated to have entered the ocean from land is unaccounted for. Better understanding of how plastic debris is transported from coastal and marine sources is crucial to quantify and close the global inventory of marine plastics, which in turn represents critical information for mitigation or policy strategies. At the same time, plastic is a unique tracer that provides an opportunity to learn more about the physics and dynamics of our ocean across multiple scales, from the Ekman convergence in basin-scale gyres to individual waves in the surfzone. In this review, we comprehensively discuss what is known about the different processes that govern the transport of floating marine plastic debris in both the open ocean and the coastal zones, based on the published literature and referring to insights from neighbouring fields such as oil spill dispersion, marine safety recovery, plankton connectivity, and others. We discuss how measurements of marine plastics (both in situ and in the laboratory), remote sensing, and numerical simulations can elucidate these processes and their interactions across spatio-temporal scales. Environ. Res. Lett. 15 (2020) 023003 E van Sebille et al Environ. Res. Lett. 15 (2020) 023003 E van Sebille et al References Acha E M, Mianzan H W, Iribarne O, Gagliardini D A, Lasta C and Daleo P 2003 The role of the Rı́o de la Plata bottom salinity front in accumulating debris Mar. Pollut. Bull. 46 197-202 Acha E M, Piola A, Iribarne O and Mianzan H 2015 Ecological Processes at Marine Fronts: Oases in the Ocean (Berlin: Springer) Aliani S and Molcard A 2003 Hitch-hiking on floating marine debris: macrobenthic species in the Western Mediterranean Sea Hydrobiologia 503 59-67 Allen J 1985 Principles of Physical Sedimentology (Berlin: Springer) Alpers W 1985 Theory of radar imaging of internal waves Nature 314 245-7 Alsina J M and Cáceres I 2011 Sediment suspension events in the inner surf and swash zone. Measurements in large-scale and high-energy wave conditions Coast. Eng. 58

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“…The model results showed that mesoand macroplastics were selectively conveyed onshore by a combination of Stokes drift and terminal velocity factors that were dependent on fragment size (Isobe et al, 2014). Field trials also demonstrated that small suspended particles were likely to be trapped by eddies due to their smaller UTV (upward terminal velocity) and be backwashed to the surf zone by the backwash waves (Hinata et al, 2017). In contrast, the large suspended materials drifted on the surface due to larger UTV and were pushed to the upper backshore by swash waves (Hinata et al, 2017).…”

Section: Discussionmentioning

confidence: 96%

“…Field trials also demonstrated that small suspended particles were likely to be trapped by eddies due to their smaller UTV (upward terminal velocity) and be backwashed to the surf zone by the backwash waves (Hinata et al, 2017). In contrast, the large suspended materials drifted on the surface due to larger UTV and were pushed to the upper backshore by swash waves (Hinata et al, 2017). The ability of S. alterniflora to trap microplastic particles at the edge position and susceptibility of macroplastics for transport to the saltmarsh interior may co-contribute to the preferential accumulation of macroplastics inside the saltmarshes and microplastics at the marsh edge of Linkun Island.…”

Section: Discussionmentioning

confidence: 99%

Micro- and macroplastic accumulation in a newly formed Spartina alterniflora colonized estuarine saltmarsh in southeast China

Yao

Wang

et al. 2019

Marine Pollution Bulletin

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An estimation of the average residence times and onshore-offshore diffusivities of beached microplastics based on the population decay of tagged meso- and macrolitter

Cited by 82 publications

References 34 publications

Microplastics in surface water and sediments of Chongming Island in the Yangtze Estuary, China

Microplastics in surface water and sediments of Chongming Island in the Yangtze Estuary, China

The physical oceanography of the transport of floating marine debris

Micro- and macroplastic accumulation in a newly formed Spartina alterniflora colonized estuarine saltmarsh in southeast China

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