Microplastics concentration collected aboard ice breaker Oden in the Arctic Central basin from 2016-08-09 to 2016-09-16 (NCEI Accession 0270539)
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title: Microplastics concentration collected aboard ice breaker Oden in the Arctic Central basin from 2016-08-09 to 2016-09-16 (NCEI Accession 0270539)
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abstract: This study was carried out to estimate the microplastics (i.e. plastics measuring less than 5mm, reported in unit of pieces/m^3) concentration in the Arctic Central basin. Microplastics data was collected from 2016-08-09 to 2016-09-16 aboard the Swedish icebreaker Oden. Ocean water was pumped onboard the vessel via the bow water system to collect microplastics samples. This dataset contains the results from all 58 sampling stations, in a spreadsheet format.
purpose: These data were collected in order to determine the microplastics concentrations in the Arctic Central basin.
credit: Related Funding Agency: Swedish Polar Research Secretariat
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title: Kanhai La DK, Gardfeldt K, Lyashevska O, Hassellov M, Thompson RC, O'Connora I. Microplastics in sub-surface waters of the Arctic Central Basin. Marine Pollution Bulletin. 2018 May 01;130:8-18.
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description: Parameter or Variable: MICROPLASTIC CONCENTRATION (measured); Units: pieces/m3; Observation Category: in situ; Sampling Instrument: Water pump; Sampling and Analyzing Method: This study was conducted onboard the Swedish icebreaker Oden during the Arctic Ocean 2016 expedition. The vessel departed Longyearbyen, Svalbard on August 8, 2016 and traversed approximately 4943 nautical miles in the Arctic Ocean until its return on September 19, 2016. Oceanic water pumped onboard the vessel via the bow water system was sampled for microplastics. Sampling was conducted for a period of approximately 6 weeks (9 August to 16 September 2016). Since each sample constituted the filtration of approximately 2000 L of water, the total survey effort for this study was approximately 116,000 L of water (58 samples). Seawater from a continuous intake located at the keel of the ship (depth 8.5 m) was pumped onboard the vessel using a rotary positive displacement pump (Universal II Series Pump, Waukesha Cherry-Burrell) at a flow rate of 85 L/min (at optimal capacity) and transported to the laboratory via stainless steel pipes. In the laboratory, seawater from the vessel's bow water system was allowed to flow through a covered stainless-steel sieve (250 μm) by means of a connection hose fitted into the wooden sieve cover. For the duration of the sampling, the stainless-steel sieve was supported in a wooden stand. Approximately 2000 L of water was filtered for each sample. The length of time taken for the filtration of the specified volume of water was determined by calculation of the flow rate of the seawater. A flow meter, attached at a point prior to the entry of the water into the sieve, was also used to verify the volume of water filtered. Once the specified volume of water was filtered, the sieve was removed and Milli-Q water was used to wash retained material from the sieve into a clean container. The collected material was then filtered under vacuum onto glass microfiber paper (GF/C); Whatman: 47 mm, pore size: 1.2 μm, using a Buchner funnel and a vacuum flask. Each filter paper was then placed into a clean plastic petri dish, covered and stored in a freezer (−20 °C) until returned to the laboratory. At the start and at the end of each sample, positioning data were collected. In the laboratory, filter papers were removed from the freezer, left to dry and then visually examined under a dissecting microscope (Olympus SZX10) equipped with a polarizer and camera (Q Imaging Retiga 2000R). Potential microplastics were isolated and processed (photographed and length measurements taken) prior to transferring to a clean filter paper in a labelled petri dish. All potential microplastics were analyzed by Fourier transform infrared (FT-IR) spectroscopy on a Thermo Scientific Nicolet iN10 FT-IR spectrometer.; Data Quality Method: In order to confirm the polymeric nature, the samples were analyzed by Fourier transform infrared (FT-IR) spectroscopy on a Thermo Scientific Nicolet iN10 FT-IR spectrometer. Prior to analyzing each sample, background scans were performed and sample spectra were automatically corrected. Samples which produced spectra with a match <60% were automatically rejected while those with a match of >70% were automatically accepted. All spectra with matches >60% were individually examined to ensure that there was clear evidence of peaks from the sample corresponding to known peaks of standard polymers and that instances of the misidentification of natural and semi-synthetic polymers was reduced..
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