Experimental investigation on the nearshore transport of buoyant microplastic particles

Research output: Contribution to journalArticleResearchpeer review

Authors

  • Bjarke Eltard Larsen
  • Mustafa Ali Abdullah Al-Obaidi
  • Hasan Gokhan Guler
  • Stefan Carstensen
  • Koray Deniz Goral
  • Erik Damgaard Christensen
  • Nils B. Kerpen
  • Torsten Schlurmann
  • David R. Fuhrman

External Research Organisations

  • Technical University of Denmark
  • Middle East Technical University (METU)
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Details

Original languageEnglish
Article number114610
JournalMarine pollution bulletin
Volume187
Early online date18 Jan 2023
Publication statusPublished - Feb 2023

Abstract

This paper presents experimental measurements of beaching times for buoyant microplastic particles released, both in the pre-breaking region and within the surf zone. The beaching times are used to quantify cross-shore Lagrangian transport velocities of the microplastics. Prior to breaking the particles travel onshore with a velocity close to the Lagrangian fluid particle velocity, regardless of particle characteristics. In the surf zone the Lagrangian velocities of the microplastics increase and become closer to the wave celerity. Furthermore, it is demonstrated that particles having low Dean numbers (dimensionless fall velocity) are transported at higher mean velocities, as they have a larger tendency to be at the free-surface relative to particles with higher Dean numbers. An empirical relation is formulated for predicting the cross-shore Lagrangian transport velocities of buoyant microplastic particles, valid for both non-breaking and breaking irregular waves. The expression matches the present experiments well, in addition to two prior studies.

Keywords

    Breaking waves, Buoyant particles, Lagrangian transport velocities, Microplastic particles, Non-breaking waves

ASJC Scopus subject areas

Research Area (based on ÖFOS 2012)

Sustainable Development Goals

Cite this

Experimental investigation on the nearshore transport of buoyant microplastic particles. / Larsen, Bjarke Eltard; Al-Obaidi, Mustafa Ali Abdullah; Guler, Hasan Gokhan et al.
In: Marine pollution bulletin, Vol. 187, 114610, 02.2023.

Research output: Contribution to journalArticleResearchpeer review

Larsen, BE, Al-Obaidi, MAA, Guler, HG, Carstensen, S, Goral, KD, Christensen, ED, Kerpen, NB, Schlurmann, T & Fuhrman, DR 2023, 'Experimental investigation on the nearshore transport of buoyant microplastic particles', Marine pollution bulletin, vol. 187, 114610. https://doi.org/10.1016/j.marpolbul.2023.114610
Larsen, B. E., Al-Obaidi, M. A. A., Guler, H. G., Carstensen, S., Goral, K. D., Christensen, E. D., Kerpen, N. B., Schlurmann, T., & Fuhrman, D. R. (2023). Experimental investigation on the nearshore transport of buoyant microplastic particles. Marine pollution bulletin, 187, Article 114610. https://doi.org/10.1016/j.marpolbul.2023.114610
Larsen BE, Al-Obaidi MAA, Guler HG, Carstensen S, Goral KD, Christensen ED et al. Experimental investigation on the nearshore transport of buoyant microplastic particles. Marine pollution bulletin. 2023 Feb;187:114610. Epub 2023 Jan 18. doi: 10.1016/j.marpolbul.2023.114610
Larsen, Bjarke Eltard ; Al-Obaidi, Mustafa Ali Abdullah ; Guler, Hasan Gokhan et al. / Experimental investigation on the nearshore transport of buoyant microplastic particles. In: Marine pollution bulletin. 2023 ; Vol. 187.
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abstract = "This paper presents experimental measurements of beaching times for buoyant microplastic particles released, both in the pre-breaking region and within the surf zone. The beaching times are used to quantify cross-shore Lagrangian transport velocities of the microplastics. Prior to breaking the particles travel onshore with a velocity close to the Lagrangian fluid particle velocity, regardless of particle characteristics. In the surf zone the Lagrangian velocities of the microplastics increase and become closer to the wave celerity. Furthermore, it is demonstrated that particles having low Dean numbers (dimensionless fall velocity) are transported at higher mean velocities, as they have a larger tendency to be at the free-surface relative to particles with higher Dean numbers. An empirical relation is formulated for predicting the cross-shore Lagrangian transport velocities of buoyant microplastic particles, valid for both non-breaking and breaking irregular waves. The expression matches the present experiments well, in addition to two prior studies.",
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AU - Larsen, Bjarke Eltard

AU - Al-Obaidi, Mustafa Ali Abdullah

AU - Guler, Hasan Gokhan

AU - Carstensen, Stefan

AU - Goral, Koray Deniz

AU - Christensen, Erik Damgaard

AU - Kerpen, Nils B.

AU - Schlurmann, Torsten

AU - Fuhrman, David R.

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