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  • 1
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    Deutsches GeoForschungsZentrum GFZ
    In:  Scientific Technical Report
    Publication Date: 2019-04-17
    Language: German
    Type: http://purl.org/eprint/type/Report
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  • 2
    Publication Date: 2019-04-17
    Description: In S?dostalaska wird eine relative Meeresspiegelabsenkung von bis zu 4 cm/ a beobachtet. Da dieses Gebiet w?hrend der letzten Kaltperiode durch das Kordillerische Eisschild bedeckt war und noch heute von Vergletscherung gepr?gt ist, liegt die Vermutung nahe, da? die Meeresspiegel?nderungen zumindest teilweise durch isostatische Ausgleichsvorg?nge hervorgerufen werden. Um diese Hypothese zu pr?fen, werden f?r dieses Gebiet eislastinduzierte Vertikalbewegungen und Geoid?nderungen mit Hilfe viskoelastischer Erdmodelle berechnet. Insbesondere werden sechs siebenschichtige Erdmodelle verwendet, die unterschiedliche Viskostit?tsprofile ber?cksichtigen und die Bandbreite der plausiblen Lithosph?renm?chtigkeiten abdecken. Das globale Lastmodell ICE-3G wird erweitert und das regionale Lastmodell AL-1 entwickelt, welches die rezente Vergletscherung S?dostalaskas ber?cksichtigt. Weiterhin werden die Ozeane als Last einbezogen. Ein Vergleich der berechneten mit den beobachteten Meeresspiegel?nderungen zeigt, da? die Beobachtungen nur zu einen geringen Anteil von wenigen Millimetern pro Jahr durch Isostasie erkl?rt werden k?nnen.
    Language: German
    Type: http://purl.org/eprint/type/Report
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  • 3
    Publication Date: 2019-04-11
    Language: German
    Type: http://purl.org/eprint/type/Report
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  • 4
    Publication Date: 2019-04-24
    Language: German
    Type: http://purl.org/escidoc/metadata/ves/publication-types/journal
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  • 5
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    Deutsches GeoForschungsZentrum GFZ
    In:  System Erde
    Publication Date: 2019-06-12
    Language: German
    Type: http://purl.org/escidoc/metadata/ves/publication-types/article
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  • 6
    Publication Date: 2019-06-12
    Description: The basic seismic load parameters for the upcoming national design regulation for DIN EN 1998-1/NA result from the reassessment of the seismic hazard supported by the German Institution for Civil Engineering (DIBt). This study is based on a comprehensive involvement of accessible uncertainties in models and parameters. It includes the provision of a rational framework for integrating epistemic uncertainties and aleatory variabilities in a comprehensive way and incorporates significant improvements. It is based on updated and extended databases, robust methods to evolve sets of models representing epistemic uncertainties and a selection of latest : ground shaking prediction models. The output specifications were designed according to the user oriented needs: Seismic load parameters are calculated for rock conditions, mean return periods of 475, 975 and 2475 years and delivered as uniform hazard spectra, seismic hazard maps for peak ground acceleration, spectral response accelerations and macroseismic intensities as mean, median and 84 % quantile. Examples of some elements of the input and a few basis results are shown.
    Language: German
    Type: http://purl.org/escidoc/metadata/ves/publication-types/article
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  • 7
    Publication Date: 2019-06-12
    Description: In the course of converting the energy supply from fossil-based to more sustainable regenerative energy resources, the use of the geological underground for energy storage purposes is becoming increasingly important to achieve the national climate policy goals. The geological underground offers opportunities for the storage of hydrogen, CO2 and synthetic gas as well as for the permanent storage of hazardous and environmentally harmful substances, e.g. radioactive waste. In the course of the energy transition and the discussion on climate change mitigation options, the demand for new storage technologies and corresponding scientific research is increasing. An indispensable prerequisite for the further development of new storage technologies are scientific pilot sites and underground research laboratories. Building on its expertise in geological storage, the GFZ is conducting projects for CO2 and H2 storage as well as for nuclear waste disposal to study technological implementation and long-term safety. This research forms an indispensible contribution of the region Germany/Central Europe to the European climate and energy strategy.
    Language: German
    Type: http://purl.org/escidoc/metadata/ves/publication-types/article
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  • 8
    Publication Date: 2019-06-12
    Description: The demand for heat generation based on renewable energies has become increasingly important during the last decades, especially in urban areas. Geothermal energy, the heat stored in the upper part of the Earth?s crust, offers a huge but largely untapped potential. Specifically, the use of near-surface geothermal energy increased significantly in Germany. Medium and deep geothermal energy systems provide a wide range of applications for environmentally friendly, large scale heat provision. Aquifer Thermal Energy Storage (ATES) systems, for example, offer great potential for heat supply in major cities (Fig. below, left). A case study, led by GFZ, investigated the potential of an ATES system in the centre of Berlin. The research well Gt BCh 1/2015 on the campus of the Technical University of Berlin was established, geologically characterized, and hydraulically tested. Deep geothermal systems play another important role within the future energy supply. In hydrothermal systems, direct use or conversion of extracted heat to electricity can be obtained at economically feasible costs (Fig. below, right). These resources, however, are limited in most countries due to local geological conditions. Nonetheless, sufficient heat in place is encountered in other geological settings such as the so called ?petrothermal? systems, which could cover the heat demand for centuries. However, the initial productivity of these systems is often too low for an economically viable utilization. Further research and demonstrators are needed to improve the efficiency and sustainability of geothermal energy systems. Gro? Sch?nebeck, the geothermal research site of the GFZ, has been established as a research platform for technology development and process understanding in order to achieve a broader spectrum of technical solutions for using this domestic form of energy.
    Language: German
    Type: http://purl.org/escidoc/metadata/ves/publication-types/article
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  • 9
    Publication Date: 2019-06-12
    Description: ProSalz is a BMBF-funded research project that aims for a better process understanding of geochemical and hydrodynamic interactions between different gases, inhomogeneous salts and moisture and their temporal and spatial dimensions in marginal areas of cavernous salt structures. Through the close cooperation of science and industry, issues of result scalability can be addressed because experiments are performed not only in the laboratory and on the computer but also in situ, in an underground mine. This validates the application of the results to real scenarios such as cavern storage facilities and natural cavernous structures in salt deposits.
    Language: German
    Type: http://purl.org/escidoc/metadata/ves/publication-types/article
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  • 10
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    Deutsches GeoForschungsZentrum GFZ
    In:  System Erde
    Publication Date: 2019-06-13
    Language: German
    Type: http://purl.org/escidoc/metadata/ves/publication-types/article
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