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  • Einzeller
  • Geophysics.
  • Geschichte
  • climate variability
  • Bremen  (1)
  • Cham : Imprint: Springer  (1)
  • Kiel
  • Rostock : Universität Rostock
  • 1
    Online Resource
    Online Resource
    Cham : Springer Nature Switzerland | Cham : Imprint: Springer
    Keywords: Physical geography. ; Geology. ; Geophysics. ; Chemical engineering. ; Environmental engineering. ; Oceanography.
    Description / Table of Contents: This book presents short papers of participants of the 9th International Scientific Conference-School for Young Scientists «Physical and Mathematical Modeling of Earth and Environment Processes. A special focus is given to the extraction of hydrocarbon resources, including from unconventional sources. An alternative to the use of hydrocarbons as a main source of energy on the Planet in the coming decades is unlikely to be found. At the same time, the resource base of hydrocarbons is quickly depleted, in particularly, large and accessible oil and gas fields. The shale oil and gas, Arctic hydrocarbon stocks, gas hydrates, coal bed methane, oil and gas from deep horizons can become new sources. "Deep oil" may be the most promising source of expanding the resource base of hydrocarbons according to many experts. New technologies are required to their development. Efficient low-cost technologies can be created on the basis of geomechanical approach, i.e., through the use of a huge elastic energy stored in the rock massif due to rock pressure. The creation of new breakthrough approaches to the development of hydrocarbon fields is very important in today's geopolitical conditions and requires the involvement of young minds and strength. International activities, including the youth scientific schools, can become an effective tool for exchange of information and the organizing of interdisciplinary research of processes in geo-environment. The book presents the new results of the experimental and theoretical modeling of deformation, fracture, and filtration processes in the rocks in connection to issues of creating scientific fundamentals for new hydrocarbon production technologies. The investigations of the dependence of well stability and permeability of rocks on the stress-strain state in conditions of deep horizons and high rock pressure are also represented.
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource(XI, 698 p. 321 illus., 227 illus. in color.)
    Edition: 1st ed. 2024.
    ISBN: 9783031545894
    Series Statement: Springer Proceedings in Earth and Environmental Sciences
    Language: English
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  • 2
    Keywords: climate variability ; carbonate production ; paleoceanography ; warm climates ; microfossils ; Cenozoic ; Hochschulschrift
    Description / Table of Contents: The biological carbon uptake, called biological compensation, have been shown to have a huge potential to affect the capacity of the ocean to absorb (anthropogenic) carbon dioxide, and so equilibrate the global carbon budget and hence climate. Since the pelagic calcite flux is made of two fundamentally different components, coccolithophore algae and planktonic foraminifera, understanding of the process of biological compensation requires knowledge of variability of their relative contribution to the total pelagic calcite flux. The aspects of the pelagic carbonate production that have changed through time and the mechanisms explaining the observed carbonate flux variability remain, despite their importance, largely unconstrained. In order to evaluate the orbital and long geological time scale variability of the pelagic carbonate production, I generated new high-resolution records of carbonate accumulation rate, using marine sediments deposited in the equatorial Atlantic Ocean (Ceará Rise) at ODP Site 927, across four warm climates intervals ranging from the Neogene to the Quaternary. I find that the relative contribution of the two groups to the total pelagic carbonate production remains relatively constant on long geological time scales, shows a high orbital time scale variability (factor of two), and is not driving the changes in total pelagic carbonate production. I conclude that at the studied location, the main driver of the pelagic carbonate changes, for both the planktonic foraminifera and the coccoliths were changes in population growth, with a shift in the composition of the communities. The observed dominant periodicities in carbonate accumulation rate indicate that the two groups responded to local changes in factors affecting their productivity, rather than to global climate modulations. On both time scales, the observed changes were large enough to affect the marine inorganic carbon cycle and thus the ocean’s capacity to absorb inorganic carbon.
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (157 Seiten) , Illustrationen
    Language: English
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