Preprints
https://doi.org/10.5194/essd-2023-209
https://doi.org/10.5194/essd-2023-209
07 Jun 2023
 | 07 Jun 2023
Status: a revised version of this preprint was accepted for the journal ESSD and is expected to appear here in due course.

Hyperspectral reflectance of pristine, ocean weathered and biofouled plastics from dry to wet and submerged state

Robin V. F. de Vries, Shungudzemwoyo P. Garaba, and Sarah-Jeanne Royer

Abstract. High-quality spectral reference libraries are important for algorithm development and identification of diagnostic optical features of target objects in environmental remote sensing applications. We present additional measurements conducted using hyperspectral sensor technologies in a laboratory and outdoor setting to further extend high-quality data as well as diversity in available open-access spectral reference libraries. These observations involved gathering hyperspectral single-pixel point and multi-pixel optical properties of a diverse set of plastic materials (e.g., ropes, nets, packaging, and personal protective equipment). Measurements of COVID-19 personal protective equipment were conducted to also further expand reference datasets that could be useful in monitoring mismanaged waste related to the pandemic. The sample set consisted of virgin polymers and ocean-weathered and artificially biofouled objects of varying apparent colors, shapes, forms, thicknesses, and opacity. A Spectral Evolution spectroradiometer was used to collect hyperspectral reflectance single pixel point information from 280 – 2500 nm. Imaging was also performed using a Specim IQ hyperspectral camera from 400 – 1000 nm. Sampling underwater was completed in intervals of 0.005 m to 0.215 m within a 0.005 – 0.715 m depth range. All optical measurements are available in open-access for the laboratory experiment through https://doi.org/10.4121/769cc482-b104-4927-a94b-b16f6618c3b3 (de Vries and Garaba, 2023) and outdoors campaign involving the biofouling samples via https://doi.org/10.4121/7c53b72a-be97-478b-9288-ff9c850de64b (de Vries et al., 2023).

Robin V. F. de Vries et al.

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on essd-2023-209', Chuanmin Hu, 17 Jun 2023
  • RC1: 'Comment on essd-2023-209', Anonymous Referee #1, 23 Jun 2023
  • RC2: 'Comment on essd-2023-209', Anonymous Referee #2, 30 Jun 2023
  • RC3: 'Comment on essd-2023-209', Samantha Lavender, 10 Jul 2023
  • AC1: 'Final response on essd-2023-209', Robin de Vries, 04 Sep 2023

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on essd-2023-209', Chuanmin Hu, 17 Jun 2023
  • RC1: 'Comment on essd-2023-209', Anonymous Referee #1, 23 Jun 2023
  • RC2: 'Comment on essd-2023-209', Anonymous Referee #2, 30 Jun 2023
  • RC3: 'Comment on essd-2023-209', Samantha Lavender, 10 Jul 2023
  • AC1: 'Final response on essd-2023-209', Robin de Vries, 04 Sep 2023

Robin V. F. de Vries et al.

Data sets

Dataset of spectral reflectances and hypercubes of submerged biofouled, pristine, and ocean-harvested marine litter Robin V. F. de Vries, Shungudzemwoyo P. Garaba , Sarah-Jeanne Royer https://doi.org/10.4121/7c53b72a-be97-478b-9288-ff9c850de64b.v1

Dataset of spectral reflectances and hypercubes of submerged plastic litter, including COVID-19 medical waste, pristine plastics, and ocean-harvested plastics Robin V. F. de Vries, Shungudzemwoyo P. Garaba https://doi.org/10.4121/769cc482-b104-4927-a94b-b16f6618c3b3.v1

Robin V. F. de Vries et al.

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Short summary
This paper presents a unique dataset of hyperspectral measurements of various plastics, including aged plastics harvested from the open ocean (North Pacific Ocean) and COVID-19 related plastic items. These datasets are vital as input for the development of remote sensing technology to better map and locate plastic litter pollution in the natural environment. In this study, there is specific emphasis on the spectral characteristics of submerged plastics.