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  • 1
    Publication Date: 2024-05-23
    Description: The deep ocean below 200 m water depth is the least observed, but largest habitat on our planet by volume and area. Over 150 years of exploration has revealed that this dynamic system provides critical climate regulation, houses a wealth of energy, mineral, and biological resources, and represents a vast repository of biological diversity. A long history of deep-ocean exploration and observation led to the initial concept for the Deep-Ocean Observing Strategy (DOOS), under the auspices of the Global Ocean Observing System (GOOS). Here we discuss the scientific need for globally integrated deep-ocean observing, its status, and the key scientific questions and societal mandates driving observing requirements over the next decade. We consider the Essential Ocean Variables (EOVs) needed to address deep-ocean challenges within the physical, biogeochemical, and biological/ecosystem sciences according to the Framework for Ocean Observing (FOO), and map these onto scientific questions. Opportunities for new and expanded synergies among deep-ocean stakeholders are discussed, including academic-industry partnerships with the oil and gas, mining, cable and fishing industries, the ocean exploration and mapping community, and biodiversity conservation initiatives. Future deep-ocean observing will benefit from the greater integration across traditional disciplines and sectors, achieved through demonstration projects and facilitated reuse and repurposing of existing deep-sea data efforts. We highlight examples of existing and emerging deep-sea methods and technologies, noting key challenges associated with data volume, preservation, standardization, and accessibility. Emerging technologies relevant to deep-ocean sustainability and the blue economy include novel genomics approaches, imaging technologies, and ultra-deep hydrographic measurements. Capacity building will be necessary to integrate capabilities into programs and projects at a global scale. Progress can be facilitated by Open Science and Findable, Accessible, Interoperable, Reusable (FAIR) data principles and converge on agreed to data standards, practices, vocabularies, and registries. We envision expansion of the deep-ocean observing community to embrace the participation of academia, industry, NGOs, national governments, international governmental organizations, and the public at large in order to unlock critical knowledge contained in the deep ocean over coming decades, and to realize the mutual benefits of thoughtful deep-ocean observing for all elements of a sustainable ocean.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , peerRev
    Format: application/pdf
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Industrial & engineering chemistry 38 (1946), S. 512-517 
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Industrial & engineering chemistry 38 (1946), S. 1110-1116 
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Industrial & engineering chemistry 39 (1947), S. 1457-1461 
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Industrial & engineering chemistry 37 (1945), S. 73-79 
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Industrial & engineering chemistry 40 (1948), S. 84-84 
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 158 (1946), S. 307-307 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE electrolytic polishing of multi-phase metals is usually more difficult than that of single-phase metals owing to differing properties, such as electrode potential, of the different phases. This difficulty may be turned into a helpful factor in certain cases. Thus lead may be detected and ...
    Type of Medium: Electronic Resource
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  • 8
    Publication Date: 2016-07-28
    Description: A design to extend the unique divertor Thomson scattering system on DIII-D to allow measurements of electron temperature and density in high triangularity plasmas is presented. Access to this region is selectable on a shot-by-shot basis by redirecting the laser beam of the existing divertor Thomson system inboard — beneath the lower floor using a moveable, high-damage threshold, in-vacuum mirror — and then redirecting again vertically. The currently measured divertor region remains available with this mirror retracted. Scattered light is collected from viewchords near the divertor floor using in-vacuum, high temperature optical elements and relayed through the port window, before being coupled into optical fiber bundles. At higher elevations from the floor, measurements are made by dynamically re-focusing the existing divertor system collection optics. Nd:YAG laser timing, analysis of the scattered light spectrum via polychromators, data acquisition, and calibration are all handled by existing systems or methods of the current multi-pulse Thomson scattering system. Existing filtered polychromators with 7 spectral channels are employed to provide maximum measurement breadth ( T e in the range of 0.5 eV–2 keV, n e in the range of 5 × 10 18 –1 × 10 21 m 3 ) for both low T e in detachment and high T e measurement up beyond the separatrix.
    Print ISSN: 0034-6748
    Electronic ISSN: 1089-7623
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
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  • 9
    Publication Date: 2015-12-25
    Description: An unusual deep-water lithofacies has been penetrated by numerous wells along the equatorial margin of West Africa by Anadarko Petroleum and other operators. An exploration well drilled in 2009 was initially thought to contain very thick, high-quality sands in the Lower Campanian section. Wireline log interpretations calculated the section to be a quartz-rich reservoir rock with 67–83% quartz based on X-ray diffraction analysis and effective porosity values as high as 25%. This petrophysical analysis appeared to differ from the well site geological description of 200 m of ‘claystone’. The conflict between field observations and the interpreted wireline data led to the re-evaluation of earlier wells and interest in gathering data from this unusual lithofacies from subsequent wells. Field observations (from wellsite geologists) derived from this Lower Campanian section have been consistent in describing this lithofacies as ‘claystone’. Sidewall cores from several of the deep-water wells that penetrated this lithofacies were also consistently described as claystones. These descriptions were from visual inspection and conclusions from laboratory analysis utilizing scanning electron microscopy, X-ray diffraction analysis, laser particle size analysis and thin section point counts as evaluation tools. The sidewall cores typically contain 〉90% silt- and clay-sized particles with extremely low measured permeability as a result of highly reduced pore throat diameters. With the presence of such small grain sizes, these samples have high measured seal capacities. It is important to recognize that this unusual lithofacies exists and can easily be mistaken for a high-quality, quartz-rich sand when, in fact, it is a very low permeability ‘claystone’ with a high percentage of quartz. Wireline data over this lithofacies alone can be very misleading and rock samples must be analysed to validate or invalidate the log interpretations. Misidentifying this lithofacies as an exploration target could have obvious financial ramifications. The challenge of this regional study was to formulate a model that could explain the presence of this deep-water lithofacies over an extensive area encompassing several basins with different sediment source provenances. Based on well sample analysis, palaeoclimatic research and the use of modern day analogue examples, the deposition of aeolian-derived clay-sized quartz particles is proposed as the most likely source of this lithofacies.
    Print ISSN: 0305-8719
    Electronic ISSN: 2041-4927
    Topics: Geosciences
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  • 10
    Publication Date: 2018
    Description: 〈span〉〈div〉Abstract〈/div〉Miospores from the clastic intervals between the Robinson Limestone and the Peghorn Limestone in the Brigantian (Mississippian) stratotype section at Janny Wood, Cumbria, are assigned to the 〈span〉Tripartites vetustus–Rotaspora fracta〈/span〉 (VF) Assemblage Biozone. The species 〈span〉Murospora parthenopia〈/span〉, normally considered to be restricted to the underlying 〈span〉Raistrickia nigra–Triquitrites marginatus〈/span〉 (NM) Biozone, is also recorded. 〈span〉Tripartites vetustus〈/span〉 is recorded from the stratigraphically deepest sample, meaning that the base of the VF Biozone lies within the Asbian and not at the base of the Brigantian. The base of the VF Biozone cannot be proven in Janny Wood. A review of independent palaeontological controls on the age of the first appearance of 〈span〉T. vetustus〈/span〉 in Britain indicates a lack of stratigraphical precision at the local level.〈strong〉Supplementary material:〈/strong〉 A full biostratigraphical range chart and a spreadsheet of biostratigraphical data are available at 〈a href="https://doi.org/10.6084/m9.figshare.c.4199306"〉https://doi.org/10.6084/m9.figshare.c.4199306〈/a〉〈/span〉
    Print ISSN: 0044-0604
    Electronic ISSN: 2041-4811
    Topics: Geosciences
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