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  • 1
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    Towards Deep Sea Mining – Impact of mining activities on benthic pelagic coupling in the Clarion Clipperton Fracture Zone (2019)
    In:  EPIC3
    Details
    Publikationsdatum: 2020-10-12
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Thesis , notRev
    Standort Signatur Einschränkungen Verfügbarkeit
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    ARTIKEL (OA)
  • 2
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    Physical and hydrodynamic properties of deep sea mining-generated, abyssal sediment plumes in the Clarion Clipperton Fracture Zone (eastern-central Pacific) (2019)
    In:  EPIC3Elementa, 7(1)
    Details
    Publikationsdatum: 2019-09-16
    Beschreibung: The anthropogenic impact of polymetallic nodule harvesting in the Clarion-Clipperton Fracture Zone is expected to strongly affect the benthic ecosystem. To predict the long-term, industrial-scale impact of nodule mining on the deep-sea environment and to improve the reliability of the sediment plume model, information about the specific characteristics of deep-sea particles is needed. Discharge simulations of mining-related fine-grained (median diameter ≈ 20 μm) sediment plumes at concentrations of 35–500 mg L–1 (dry weight) showed a propensity for rapid flocculation within 10 to 135 min, resulting in the formation of large aggregates up to 1100 μm in diameter. The results indicated that the discharge of elevated plume concentrations (500 mg L–1) under an increased shear rate (G ≥ 2.4 s–1) would result in improved efficiency of sediment flocculation. Furthermore, particle transport model results suggested that even under typical deep-sea flow conditions (G ≈ 0.1 s–1), rapid deposition of particles could be expected, which would restrict heavy sediment blanketing (several centimeters) to a smaller fall-out area near the source, unless subsequent flow events resuspended the sediments. Planning for in situ tests of these model projections is underway
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Article , isiRev
    Format: application/pdf
    Standort Signatur Einschränkungen Verfügbarkeit
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    ARTIKEL (OA)
  • 3
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    Vertical distribution of particulate matter in the Clarion Clipperton Zone (German Sector) - Potential impacts from deep-sea mining discharge in the water column (2022)
    In:  EPIC3Frontiers in Marine Science, 9(820947)
    Details
    Publikationsdatum: 2022-08-15
    Beschreibung: Most studies on the potential impacts of deep-sea mining in the Clarion Clipperton Zone (CCZ) have largely focused on benthic ecosystems but ignore the pelagic environment. To model full-scale impacts, it is important to understand how sediment discharge might affect the pelagic zone as well. This study combines in situ optics, hydrography, and remote sensing to describe particle abundance and size distribution through the entire water column in the CCZ (German sector). CCZ surface waters were characterized as productive over the year. During the winter, we observed the formation of a sharp transition zone in Chla concentration, identifying the area as a productive transitional zone toward a more depleted ocean gyre. In the German sector, median particle size was small (±77 µm), and large particles (〉 300 µm) were rare. By assessing particle flux attenuation, we could show that the presence of a thick oxygen minimum zone (OMZ) plays an essential role in export and transformation of settling aggregates, with strong diel variations. We suggest that the combination of small aggregate size, bottom currents and slow seafloor consolidation may explain the extremely low sedimentation rate in the CCZ. We conclude that sediment incorporations and ballasting effect on settling particulate matter represent the most significant hazard on midwater and benthic ecosystems.
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Article , NonPeerReviewed
    Standort Signatur Einschränkungen Verfügbarkeit
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    ARTIKEL (OA)
  • 4
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    Turbidity data measured during a dredge experiment during RV SONNE cruise SO268/2 in the German license area, CCZ, NE Pacific Ocean (2022)
    PANGAEA
    Details
    Publikationsdatum: 2024-02-02
    Beschreibung: Expedition SO268 was part of the JPI Oceans project MiningImpact to assess the environmental impacts of deep sea mining of polymetallic nodules in the Clarion Clipperton Zone (CCZ). A sediment plume monitoring operation was conducted as part of this expedition. This plume was created by a dredge on 11 April 2019 between 6:30 to 19:00 UTC. Monitoring of the baseline conditions, active plume and post-disturbance effects was achieved by a sensor array of optical and acoustical sensors on platforms spread out around the plume creation site. This dataset contains calibrated optical sensor measurements of this plume array acquired by 3 different sensors.
    Schlagwort(e): Clarion Clipperton Fracture Zone; DATE/TIME; Deep-sea mining; Dredge experiment; Event label; JPI Oceans - Ecological Aspects of Deep-Sea Mining; JPIO-MiningImpact; Monitoring station; MONS; Optical backscatter sensor; Platform; Plume monitoring; Sediment plumes; Sensor array; Sensor type; SO268/2; SO268/2_111-1_RBINS_PFM-01_ENV-01; SO268/2_111-1_RBINS_PFM-02_ENV-02; SO268/2_111-1_RBINS_PFM-03_ENV-03; Sonne_2; Suspended particulate matter; Turbidity meter, Seapoint, Seapoint turbidity meter
    Materialart: Dataset
    Format: text/tab-separated-values, 93576 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
  • 5
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    Unbekannt
    Turbidity data measured during a dredge experiment during RV SONNE cruise SO268/2 in the German license area, CCZ, NE Pacific Ocean (2022)
    PANGAEA
    Details
    Publikationsdatum: 2024-02-02
    Beschreibung: Expedition SO268 was part of the JPI Oceans project MiningImpact to assess the environmental impacts of deep sea mining of polymetallic nodules in the Clarion Clipperton Zone (CCZ). A sediment plume monitoring operation was conducted as part of this expedition. This plume was created by a dredge on 11 April 2019 between 6:30 to 19:00 UTC. Monitoring of the baseline conditions, active plume and post-disturbance effects was achieved by a sensor array of optical and acoustical sensors on platforms spread out around the plume creation site. This dataset contains calibrated optical sensor measurements of this plume array acquired by 9 optical backscatter sensors (OBS).
    Schlagwort(e): Acoustic profiler; B_LANDER; Battery, voltage; Bottom lander; Clarion-Clipperton Fraction Zone, North East Pacific Ocean; Clarion Clipperton Fracture Zone; DATE/TIME; Deep-sea mining; Dredge experiment; Elevation of event; Event label; JPI Oceans - Ecological Aspects of Deep-Sea Mining; JPIO-MiningImpact; LANDER-10; Latitude of event; Longitude of event; Monitoring station; MONS; North Pacific Ocean; Optical backscatter sensor; Optical backscatter sensor (OBS), ATUD-USB, JFE Advantech; Platform; Plume monitoring; Sediment plumes; Sensor array; Sensor type; SO268/2; SO268/2_105-1; SO268/2_111-1_NIOZ_PFM-02; SO268/2_111-1_NIOZ_PFM-03_pos1; SO268/2_111-1_NIOZ_PFM-05; SO268/2_111-1_NIOZ_PFM-06; SO268/2_118-1_GMR_PFM-08; SO268/2_118-1_NIOZ_PFM-04; SO268/2_118-1_NIOZ_PFM-07_pos1; SO268/2_118-1_NIOZ_PFM-08; SO268/2_124-1_NIOZ_PFM-03_pos2; SO268/2_124-1_NIOZ_PFM-07_pos2; Sonne_2; Suspended particulate matter; Temperature, water; Turbidity (Formazin Turbidity Unit)
    Materialart: Dataset
    Format: text/tab-separated-values, 405786 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
  • 6
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    Distribution of meiofauna abundance predicted in a potential deep-sea mining area in the Clarion Clipperton Fracture Zone (CCZ) (2021)
    PANGAEA
    Details
    Publikationsdatum: 2024-04-20
    Beschreibung: The dataset contains predicted distributions of meiofauna on high taxonomic level computed for overall meiofauna abundance, diversity (Simpson's Index D and Evenness E), richness (ntax) and individual taxa using random forest regressions. The study area is a prospective mining operation area positioned in the German License Area for the Exploration of polymetallic nodules in the Clarion Clipperton Fracture Zone (CCZ). Investigating the influence of different environmental predictors, predictions are based on backscatter value and bathymetric variables only, on spatially predicted sediment and and polymetallic nodule parameters as well as on all of these environmental variables. Investigating inter-annual differences, predictions are based on samples obtained solely in 2013, 2014 and 2016, respectively. The spatial layers are saved as grid-files, being the standard format of the R-package "raster" (https://cran.r-project.org/web/packages/raster/index.html).
    Schlagwort(e): Binary Object; Binary Object (File Size); CCZ_GER; Clarion-Clipperton Fraction Zone, North East Pacific Ocean; distribution modelling; JPI Oceans - Ecological Aspects of Deep-Sea Mining; JPIO-MiningImpact; meiofauna abundance; random forest
    Materialart: Dataset
    Format: text/tab-separated-values, 6 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
  • 7
    facet.materialart.
    Unbekannt
    Turbidity and current data measured during a dredge experiment during RV SONNE cruise SO268/2 in the German license area, CCZ, NE Pacific Ocean (2022)
    PANGAEA
    Details
    Publikationsdatum: 2024-04-20
    Beschreibung: Expedition SO268 was part of the JPI Oceans project MiningImpact to assess the environmental impacts of deep sea mining of polymetallic nodules in the Clarion Clipperton Zone (CCZ). A sediment plume monitoring operation was conducted as part of this expedition. This plume was created by a dredge on 11 April 2019 between 6:30 to 19:00 UTC. Monitoring of the baseline conditions, active plume and post-disturbance effects was achieved by a sensor array of optical and acoustical sensors on platforms spread out around the plume creation site. This dataset contains (calibrated) acoustical sensor measurements of this plume array acquired by 6 different sensors.
    Schlagwort(e): Acoustic profiler; Binary Object; Binary Object (File Size); Bin number; Bin size; Clarion Clipperton Fracture Zone; Comment; Date/time start; Deep-sea mining; Dredge experiment; Elevation of event; Event label; First bin; Interval; JPI Oceans - Ecological Aspects of Deep-Sea Mining; JPIO-MiningImpact; Latitude of event; Longitude of event; Monitoring station; MONS; North Pacific Ocean; Number; Optical backscatter sensor; Orientation; Platform; Plume monitoring; Sediment plumes; Sensor array; Sensor type; SO268/2; SO268/2_111-1_GMR_PFM-07; SO268/2_111-1_GMR_PFM-09; SO268/2_111-1_GMR_PFM-10; SO268/2_118-1_GMR_PFM-08; SO268/2_118-1_NIOZ_PFM-07_pos1; SO268/2_118-1_NIOZ_PFM-08; SO268/2_124-1_NIOZ_PFM-07_pos2; Sonne_2
    Materialart: Dataset
    Format: text/tab-separated-values, 72 data points
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    DATA PANGAEA
  • 8
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    Unbekannt
    Current data measured during a dredge experiment during RV SONNE cruise SO268/2 in the German license area, CCZ, NE Pacific Ocean (2022)
    PANGAEA
    Details
    Publikationsdatum: 2024-04-20
    Beschreibung: Expedition SO268 was part of the JPI Oceans project MiningImpact to assess the environmental impacts of deep sea mining of polymetallic nodules in the Clarion Clipperton Zone (CCZ). A sediment plume monitoring operation was conducted as part of this expedition. This plume was created by a dredge on 11 April 2019 between 6:30 to 19:00 UTC. Monitoring of the baseline conditions, active plume and post-disturbance effects was achieved by a sensor array of optical and acoustical sensors on platforms spread out around the plume creation site. This dataset contains calibrated acoustical measurements of this plume array acquired by 7 acoustic profilers (AQD/ADCP).
    Schlagwort(e): Acoustic profiler; B_LANDER; Binary Object; Binary Object (File Size); Bin number; Bin size; Bottom lander; Clarion-Clipperton Fraction Zone, North East Pacific Ocean; Clarion Clipperton Fracture Zone; Comment; Date/time start; Deep-sea mining; Dredge experiment; Elevation of event; Event label; First bin; Interval; JPI Oceans - Ecological Aspects of Deep-Sea Mining; JPIO-MiningImpact; LANDER-10; Latitude of event; Longitude of event; Monitoring station; MONS; North Pacific Ocean; Number; Optical backscatter sensor; Orientation; Platform; Plume monitoring; Sediment plumes; Sensor array; Sensor type; SO268/2; SO268/2_105-1; SO268/2_111-1_NIOZ_PFM-02; SO268/2_111-1_NIOZ_PFM-03_pos1; SO268/2_111-1_NIOZ_PFM-05; SO268/2_111-1_NIOZ_PFM-06; SO268/2_118-1_NIOZ_PFM-04; SO268/2_124-1_NIOZ_PFM-03_pos2; Sonne_2
    Materialart: Dataset
    Format: text/tab-separated-values, 96 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
  • 9
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    Unbekannt
    Monitoring flocculation during a deep-sea mining test in the Clarion-Clipperton Zone, eastern equatorial Pacific Ocean (2023)
    Details
    Publikationsdatum: 2023-09-05
    Materialart: Conference or Workshop Item , NonPeerReviewed
    Format: text
    Standort Signatur Einschränkungen Verfügbarkeit
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    OceanRep: Artikel in Konferenzband
  • 10
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    Physical and hydrodynamic properties of deep sea mining-generated, abyssal sediment plumes in the Clarion Clipperton Fracture Zone (eastern-central Pacific) (2019)
    BioOne
    In:  Elementa: Science of the Anthropocene, 7 (1). p. 5.
    Details
    Publikationsdatum: 2022-01-31
    Beschreibung: The anthropogenic impact of polymetallic nodule harvesting in the Clarion-Clipperton Fracture Zone is expected to strongly affect the benthic ecosystem. To predict the long-term, industrial-scale impact of nodule mining on the deep-sea environment and to improve the reliability of the sediment plume model, information about the specific characteristics of deep-sea particles is needed. Discharge simulations of mining-related fine-grained (median diameter ≈ 20 μm) sediment plumes at concentrations of 35–500 mg L–1 (dry weight) showed a propensity for rapid flocculation within 10 to 135 min, resulting in the formation of large aggregates up to 1100 μm in diameter. The results indicated that the discharge of elevated plume concentrations (500 mg L–1) under an increased shear rate (G ≥ 2.4 s–1) would result in improved efficiency of sediment flocculation. Furthermore, particle transport model results suggested that even under typical deep-sea flow conditions (G ≈ 0.1 s–1), rapid deposition of particles could be expected, which would restrict heavy sediment blanketing (several centimeters) to a smaller fall-out area near the source, unless subsequent flow events resuspended the sediments. Planning for in situ tests of these model projections is underway
    Materialart: Article , PeerReviewed
    Format: text
    DOI: 10.1525/elementa.343
    Standort Signatur Einschränkungen Verfügbarkeit
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    OceanRep: Artikel in einer Fachzeitschrift - begutachtet
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