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  • 1
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    2. Weekly report AL575 (2022)
    GEOMAR Helmholtz Centre for Ocean Research Kiel
    Details
    Publication Date: 2022-09-13
    Description: 4 – 13 July 2022
    Type: Report , NonPeerReviewed
    Format: text
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    OceanRep: Report - Weekly report
  • 2
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    1. Weekly report AL575 (2022)
    GEOMAR Helmholtz Centre for Ocean Research Kiel
    Details
    Publication Date: 2022-09-13
    Description: 27 June – 3 July 2022
    Type: Report , NonPeerReviewed
    Format: text
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    OceanRep: Report - Weekly report
  • 3
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    Mineralische Rohstoffe der Tiefsee (2020)
    Schweizerbart
    In:  In: Tiefsee - Vielfalt in der Dunkelheit. , ed. by Müller, T. and Hoffmann-Wieck, G. Senckenberg-Buch, 83 . Schweizerbart, Stuttgart, pp. 147-149. ISBN 978-3-510-61415-8
    Details
    Publication Date: 2020-06-03
    Description: Die Erde hält eine Vielzahl natürlicher mineralischer Rohstoffe bereit, die wir in unserer hochtechnisierten Gesellschaft benötigen. Zurzeit werden fast alle diese Rohstoffe auf einer Fläche abgebaut, die weniger als ein Drittel unseres Planeten ausmacht -der Landfläche. Hier wird es jedoch immer schwieriger, reiche Vorkommen zu finden. Dies zwingt die Bergbauindustrie dazu, Lagerstätten mit geringeren Konzentrationen abzubauen bzw. nach Lagerstätten in abgelegenen Regionen der Erde oder in großer Tiefe zu suchen. Dies ist jedoch mit einem erheblichen Anstieg des Flächenverbrauchs und mit zusätzlichen Umweltbeeinträchtigungen verbunden.
    Type: Book chapter , NonPeerReviewed
    Format: text
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    OceanRep: Book chapter
  • 4
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    Methanhydrate (2020)
    Schweizerbart
    In:  In: Tiefsee - Vielfalt ind der Dunkelheit. , ed. by Müller, T. and Hoffmann-Wieck, G. Senckenberg-Buch, 83 . Schweizerbart, Stuttgart, pp. 156-158. ISBN 978-3-510-61415-8
    Details
    Publication Date: 2020-06-03
    Type: Book chapter , NonPeerReviewed
    Format: text
    Location Call Number Limitation Availability
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    OceanRep: Book chapter
  • 5
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    Environmental Impacts of Deep Seabed Mining (2020)
    Brill
    In:  In: New Knowledge and Changing Circumstances in the Law of the Sea. , ed. by Heidar, T. Brill, Leiden, pp. 327-342. ISBN 978-90-04-43775-3
    Details
    Publication Date: 2020-09-14
    Description: Exploitation of mineral ores from the deep sea will impact the abyssal environment by removing the mineral deposits and sediments from the seafloor surface, where most deep-sea benthic life is found. Additional effects are expected from the blanketing of the mined area and the pristine surrounding seabed with sediments and/or mineral debris. As a consequence, seafloor integrity is lost in the impacted area, species densities and biodiversity are reduced, and ecosystem functions are negatively affected. Although a lot of open questions remain regarding, for example, indicator species, disturbance thresholds, and renaturation options, it is becoming increasingly clear that the induced environmental impacts last for at least many decades to centuries and affect all ecosystem compartments.
    Type: Book chapter , NonPeerReviewed
    Format: text
    DOI: 10.1163/9789004437753_018
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    OceanRep: Book chapter
  • 6
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    A novel set-up for combined imaging and flow-through experiments with sediment cores (2020)
    In:  [Poster] In: 4. International Workshop on Offshore Geologic CO2 Storage and STEMM-CCS Open Science Meeting, 11.-12.02.2020, Bergen, Norway .
    Details
    Publication Date: 2020-02-19
    Type: Conference or Workshop Item , NonPeerReviewed , info:eu-repo/semantics/conferenceObject
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    OceanRep: Poster
  • 7
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    3-D Dynamics of a natural gas hydrate system in the western Black Sea (2023)
    Details
    Publication Date: 2023-11-30
    Type: Conference or Workshop Item , NonPeerReviewed
    Format: text
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    OceanRep: Poster
  • 8
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    Seafloor integrity versus critical metal supply (2021)
    Elsevier | Cell Press
    Details
    Publication Date: 2023-10-06
    Type: Article , NonPeerReviewed
    Format: text
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    OceanRep: Article in a Scientific Journal - without review
  • 9
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    Risk Assessment for Deep-Seabed Mining (2022)
    Springer
    Details
    Publication Date: 2023-10-06
    Description: Uncertainties concerning deep-seabed mining relate to the expected impacts on the abyssal benthic and pelagic environment and its ecosystems but also include geopolitical, economic, societal and cultural uncertainty. The uncertain impacts from mining lead to anxiety and a low societal acceptance for the activity and are not the same for everybody at the same time. Hence, uncertainty is an important element of the risk involved in deep-seabed mining. This chapter describes the different risks involved, develops a methodology for risk assessment for the exploitation of marine mineral resources that takes into consideration the state of knowledge and evolving research on deep-sea ecosystems, and informs on possible environmental threshold values in relation to deep-seabed mining operations.
    Type: Book chapter , NonPeerReviewed
    Format: text
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    OceanRep: Book chapter
  • 10
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    Greenhouse gas emissions from marine decommissioned hydrocarbon wells: leakage detection, monitoring and mitigation strategies (2020)
    Elsevier
    Details
    Publication Date: 2023-02-08
    Description: Highlights • Gas release from wells may counteract efforts to mitigate greenhouse gas emissions. • An approach for assessing methane release from marine decommissioned wells. • This gas release largely depends on the presence of shallow gas accumulations. • Methane release from hydrocarbon wells represents a major source in the North Sea. Abstract Hydrocarbon gas emissions from with decommissioned wells are an underreported source of greenhouse gas emissions in oil and gas provinces. The associated emissions may partly counteract efforts to mitigate greenhouse gas emissions from fossil fuel infrastructure. We have developed an approach for assessing methane leakage from marine decommissioned wells based on a combination of existing regional industrial seismic and newly acquired hydroacoustic water column imaging data from the Central North Sea. Here, we present hydroacoustic data which show that 28 out of 43 investigated wells release gas from the seafloor into the water column. This gas release largely depends on the presence of shallow gas accumulations and their distance to the wells. The released gas is likely primarily biogenic methane from shallow sources. In the upper 1,000 m below the seabed, gas migration is likely focused along drilling-induced fractures around the borehole or through non-sealing barriers. Combining available direct measurements for methane release from marine decommissioned wells with our leakage analysis suggests that gas release from investigated decommissioned hydrocarbon wells is a major source of methane in the North Sea (0.9-3.7 [95% confidence interval = 0.7-4.2] kt yr−1 of CH4 for 1,792 wells in the UK sector of the Central North Sea). This means hydrocarbon gas emissions associated with marine hydrocarbon wells are not significant for the global greenhouse gas budget, but have to be considered when compiling regional methane budgets.
    Type: Article , PeerReviewed , info:eu-repo/semantics/article
    Format: text
    Format: archive
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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