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Floating microplastics concentration collected from MV Maersk Transporter in the eastern North Pacific Ocean from 2015-08-02 to 2019-12-09 (NCEI Accession 0276263)


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            title:  Floating microplastics concentration collected from MV Maersk Transporter in the eastern North Pacific Ocean from 2015-08-02 to 2019-12-09 (NCEI Accession 0276263)
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                date:  2023-01-12
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/person/details/5721 Matthias Egger
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                individualName:  Leone, Giulia
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/2128 The Ocean Cleanup
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        abstract:  This study was carried out to estimate the floating microplastics (plastics from size 0.5mm to 5mm, reported in unit of pieces/m^3) concentration in the eastern North Pacific Ocean. Microplastics data was collected from 2015-08-02 to 2019-12-09 aboard MV Maersk Transporter, using a manta net. This dataset contains the results from all 54 sampling efforts, in a spreadsheet format.
        purpose:  These data were collected in order to determine the surface microplastics concentrations in the eastern North Pacific Ocean during 2015-08-02 to 2019-12-09
        credit:  Related Funding Agency: The Ocean Cleanup Foundation
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              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/748 microplastic concentration
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            otherConstraints:  Cite as: Egger, Matthias; Quiros, Lauren; Leone, Giulia; Ferrari, Francesco; Boerger, Christiana; Tishler, Michelle (2023). Floating microplastics concentration collected from MV Maersk Transporter in the eastern North Pacific Ocean from 2015-08-02 to 2019-12-09 (NCEI Accession 0276263). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0276263. Accessed [date].
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                title:  The NOAA NCEI Global Marine Microplastics Database (1972-present)
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                title:  Egger M, Quiros L, Leone G, Ferrari F, Boerger CM, Tishler M. Relative Abundance of Floating Plastic Debris and Neuston in the Eastern North Pacific Ocean. Frontiers in Marine Science. 2021 Jun 3;8:626026.
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1730 NOAA National Centers for Environmental Information
                contactInfo:  (CI_Contact)
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                        electronicMailAddress:  NCEI.Info@noaa.gov
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                description:  NCEI Accession 0276263 v1.1 was published.
                dateTime:
                  DateTime:  2023-01-12T16:12:53Z
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                        title:  NCEI Accession 0276263 v1.1
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                                    name:  NCEI Accession 0276263 v1.1
                                    description:  published 2023-01-12T16:12:53Z
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                description:  Parameter or Variable: MICROPLASTIC CONCENTRATION (measured); Units: pieces/m3; Observation Category: in situ; Sampling Instrument: Manta net; Sampling and Analyzing Method: Surface microplastics (from size 0.5mm to 5mm) concentrations were collected onboard MV Maersk Transporter in the eastern North Pacific Ocean. This study is based on 54 Manta trawl samples collected in the eastern North Pacific Ocean during two expeditions between August 2015 and December 2019. A total of 9 Manta trawls (Ocean Instruments, Inc.) were conducted in August 2015. The Manta trawl, with an aperture of 90 cm × 15 cm (width × height) and a square mesh net of 500 µm (333 µm mesh size cod-end), was deployed for 60–180 min at a towing speed of <3 knots. A further 45 Manta trawls were conducted for 30 min at a towing speed of <2.5 knots in November-December 2019. Sampled water volumes were estimated based on distance measurements from a mechanical flow meter (General Oceanics, Inc.) multiplied by the net mouth area. After each deployment, the net was rinsed from the outside with freshwater and the entire cod-end removed, sealed with staples, placed in individual zip-lock bags, wrapped in aluminum foil and stored frozen until further analysis in the onshore laboratory of The Ocean Cleanup in Rotterdam, Netherlands. The content of each sample was washed into a stainless-steel sieve (500 µm square mesh, 29 cm diameter). The sieve was then placed separately into round aluminum tins (30 cm diameter) filled with filtered seawater (<1 mm) from the North Pacific Ocean (salinity 35). Multiple LED lights were placed over the sieve from various angles to ensure good light conditions, which is particularly important for detecting small microplastics and organisms. Subsequently, floating objects and particles attached to biomass identified as buoyant anthropogenic debris were hand-picked individually with the naked eye using stainless-steel tweezers. The widest particle dimension was measured with a ruler.; Data Quality Method: To minimize contamination with plastic fragments, standard non-plastic laboratory, and fieldwork equipment made of metal and glass were used whenever possible, and the samples always remained covered with aluminum foil when not in use. Furthermore, all nets and all cod-ends were thoroughly rinsed from the outside prior to each deployment and carefully inspected for the presence of (micro)plastic particles. The seawater (taken from the North Pacific Ocean) used in the laboratory was filtered through a sequence of filters (<20, <5, <1 mm) and all laboratory equipment (sieves, tweezers, aluminum tins, and dishes) was thoroughly rinsed and carefully inspected for cleanliness prior to each use. Note that we did not include any microfibers in our analyses, as these fibers typically pass through the 500 µm trawling nets deployed here. Thus, possible contamination with airborne fibers (a major source of microplastic contamination) does not impact our results. Consequently, the work was performed outside a glove box or laminar flow cabinet..
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            organisationName:  NOAA National Centers for Environmental Information
            role:  (CI_RoleCode) custodian
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    acquisitionInformation:  (MI_AcquisitionInformation)
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  Manta net
            type:  Manta net
            description:  Manta net is a small, easily manageable net designed to sample plankton or microplastics located in the first few centimeters of the water column.