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  • Deutsches GeoForschungsZentrum GFZ
  • Stockholm : Europ. Council for an Energy Efficient Economy
  • Wuppertal : Wuppertal Institut für Klima, Umwelt, Energie
  • 2005-2009  (251)
  • 2006  (251)
Collection
Keywords
Publisher
Language
Years
  • 2005-2009  (251)
Year
  • 1
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    A high resolution global gravity field model combining CHAMP and GRACE satellite mission and surface data: EIGEN-CG01C (2006)
    Deutsches GeoForschungsZentrum GFZ
    In:  Scientific Technical Report STR
    Details
    Publication Date: 2020-02-12
    Description: The striking improvements in long- to medium-wavelengths gravity field recovery achieved with GPS-CHAMP and GPS-GRACE high-low and GRACE K-band range low-low satellite-to-satellite tracking prompted us to combine the satellite data with surface data from altimetry over the oceans and gravimetry over the continents to generate a new, high resolution global gravity field model: EIGEN-CG01C. The model is complete to degree/order 360 in terms of spherical harmonics and resolves half-wavelengths of 55 km in the geoid and gravity anomaly fields. A special band-limited combination method has been applied in order to preserve the high accuracy from the satellite data in the lower frequency band of the geopotential and to allow for a smooth transition to the high-frequency band, dominated by the surface data. Compared to pre-CHAMP/GRACE global high-resolution gravity field models, the accuracy was improved by one order of magnitude to 4 cm and 0.5 mgal in terms of geoid heights and gravity anomalies, respectively, at a spatial resolution of 200 km half-wavelength. The overall accuracy at degree/order 360 is estimated to be 20 cm and 5 mgal, respectively, and benefits significantly from recently released new gravity anomaly compilations over the polar regions. In general, the accuracy over the oceans is better than over the continents reflecting the higher quality of the available surface data.
    Language: English
    Type: info:eu-repo/semantics/report
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  • 2
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    Lithospheric and upper mantle structure beneath the western Bohemian Massif obtained from teleseismic P and S receiver functions (2006)
    Deutsches GeoForschungsZentrum GFZ
    In:  Scientific Technical Report STR
    Details
    Publication Date: 2020-02-12
    Description: This thesis focuses on the seismic structure of the lithosphere and upper mantle beneath the western Eger Rift area with the aim of investigating deep-lying possible causes of the phenomena observed at surface. For the investigation, data of the international passive seismic experiment BOHEMA carried out in 2002/2003 was used. The BOHEMA network consisted of 61 permanent and 84 temporary stations and was centred on the western Eger Rift. The resulting large data set allowed a high resolution P and S receiver function study using P-to-S and S-to-P converted waves, respectively, to map seismic discontinuities in the lithosphere and upper mantle. Data from an earlier passive seismic experiment was additionally used to complement the BOHEMA data set. The results of the analysis are described in this thesis ‘from top to bottom’. [...] Furthermore, the first map of average crustal vp/vs ratios is presented for the investigated area.
    Language: English
    Type: info:eu-repo/semantics/doctoralThesis
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  • 3
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    Retrieval of earthquake source parameters in inhomogeneous anisotropic media with application to swarm events in West Bohemia in 2000 (2006)
    Deutsches GeoForschungsZentrum GFZ
    In:  Scientific Technical Report STR
    Details
    Publication Date: 2020-02-12
    Description: In der vorliegenden Arbeit werden der Einfluss seismischer Anisotropie auf wahre oder scheinbar auftretende tensile Quellanteile untersucht und Erdbebenmechanismen unter Berücksichtigung seismischer Anisotropie bestimmt. Es wird gezeigt, dass der Momententensor und die Abstrahlmuster eines Scherbruches im anisotropen Medium denen eines tensilen Bruches im isotropen Medium ähneln können. Umgekehrt treten Ähnlichkeiten tensiler Beben in anisotropen Gesteinen mit Scherbrüchen in isotropen Medien auf. Damit existieren Mehrdeutigkeiten beobachteter tensiler Quellanteile. Die Effekte von Anisotropie hängen von der Orientierung des Bruches und vom Grad der Anisotropie ab. Außerdem beeinflusst Anisotropie das Moment eines Bebens. [...] Mit dieser Arbeit werden erstmals zeitliche und räumliche Veränderungen tensiler Quellanteile und Spannungszustände im Vogtland für Erdbeben im Jahr 2000 beob- achtet. Diese haben auch dann Bestand, wenn seismische Anisotropie berücksichtigt wird. Sie können durch Fluide erklärt werden, die in die Bruchflächen eindringen.
    Language: English
    Type: info:eu-repo/semantics/doctoralThesis
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  • 4
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    Innovation und Zukunft der Steine- und Erden-Industrie in Mitteleuropa (2006)
    Deutsches GeoForschungsZentrum GFZ
    In:  Scientific Technical Report STR
    Details
    Publication Date: 2020-02-12
    Description: Das Veranstaltungsthema „Innovation und Zukunft der Steine- und Erden-Industrie in Mitteleuropa“ wurde gewählt, um die seit 30 Jahren verpasste Gelegenheit ins Bewusstsein zu rufen, dass eine moderne Industrie heimische Rohstoffe benötigt. Wie sich aus den Einzelbeiträgen und den Tabellen entnehmen lässt, ist die Bundesrepublik Deutschland hinsichtlich der Steine und Erden ein rohstoffreiches Land und ein wesentlicher Wirtschaftsfaktor. Dieses Bewusstsein scheint bei der überbordenden ‚Ökologie’-diskussion erst seit kurzer Zeit in den Fokus zu geraten, wurde doch bei allen Diskussionen der Naturschutzgesetzgebung etc. fast völlig vergessen, dass Rohstoffabbau nur möglich ist, wenn Vorrang- oder Schutzzonen mindestens für die nächsten 50 Jahre ausgewiesen werden, wobei das eine Daueraufgabe in der Zeit ist. Diese Aufgabe ist eigentlich eine Hoheitsaufgabe und setzt auch die geologisch / bodenkundliche Basiskartierung der Bundesrepublik Deutschland auf neuesten Stand flächendeckend voraus, um flexibel mit neuen Konzepten auf neueste industrielle Herausforderungen antworten zu können. NEGENDANK (2005) hat einige statistische Daten zusammengetragen, aus denen die Bedeutung im Überblick hervorgeht (Tab. S. 3). Die hier vorgelegten Beiträge erlauben einen vertiefenden Einblick in die Situation der Steine- und Erdenindustrie, ihres Innovationspotentials sowie ihrer Zukunft.
    Language: German
    Type: info:eu-repo/semantics/report
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  • 5
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    Thermomechanical polythermal ice-sheet model (2006)
    Deutsches GeoForschungsZentrum GFZ
    In:  Scientific Technical Report STR
    Details
    Publication Date: 2020-02-12
    Description: Based on the physical processes governing the motion and dynamics of poly-thermal ice sheets, we distinguish two regions; the cold region, where the ice temperature is below the melting point, and the temperate region, where the ice temperature is exactly equal to the melting point, leading to the presence of a water fraction. This work focuses on the analysis and description of the temperate zone on the basis of rational thermo-dynamics of reacting mixtures. The balance laws for the ice-water mixture, that is the mass balance, balance of linear and angular momenta, energy and entropy, are discussed. A physical model for a polythermal ice sheet is then established, including appropriate boundary and transition conditions. The resulting formulation is convenient for numerical implementation. Numerical examples are carried out for a stationary 2-D case and the results of the present and traditional formulations are compared.
    Language: English
    Type: info:eu-repo/semantics/report
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  • 6
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    On the relation of stress and deformation fields to natural and induced seismicity (2006)
    Deutsches GeoForschungsZentrum GFZ
    In:  Scientific Technical Report STR
    Details
    Publication Date: 2020-02-12
    Description: This work describes the results of seismological field campaigns and experiments using combined seismic networks of varying geometries such as a combined seismic downhole and surface network or a combined temporary local and permanent regional network. The networks were deployed in different tectonic environments, i.e. in a stable intraplate surrounding, at a plate boundary along a major transform fault zone and in forearc and backarc settings of a subduction zone to record different types of seismicity (induced earthquakes, aftershocks, subduction-related seismicity). Recording periods are typically several months. The basic ideas behind all the different experiments and studies presented here can be described as follows: In a first step, a state of the art seismic network is designed and deployed in a selected area to record local (micro)seismic activity at low magnitude detection threshold. The acquired data base is then evaluated using standard processing techniques to generate a proper hypocenter catalog for the area of investigation during the observational period. This period might be extended (at higher magnitude detection threshold) through re-evaluating and calibrating earlier hypocenter catalogs gained from records of regional permanent networks. This new catalog for the selected region then forms the base for further evaluation using different approaches one of which is the determination of fault plane solutions in order to determine the local stress field orientation and relate it to the WSM data or information on regional displacement fields determined from GPS recordings.
    Language: English
    Type: info:eu-repo/semantics/other
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  • 7
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    Mean annual and seasonal atmospheric tide models based on 3-hourly and 6-hourly ECMWF surface pressure data (2006)
    Deutsches GeoForschungsZentrum GFZ
    In:  Scientific Technical Report STR
    Details
    Publication Date: 2020-02-12
    Language: English
    Type: info:eu-repo/semantics/report
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  • 8
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    Möglichkeiten und Grenzen der Hill-Gleichungen für die Schwerefeldbestimmung (2006)
    Deutsches GeoForschungsZentrum GFZ
    In:  Scientific Technical Report STR
    Details
    Publication Date: 2020-02-12
    Language: German
    Type: info:eu-repo/semantics/doctoralThesis
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  • 9
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    Geothermisch angetriebene Dampfkraftprozesse : Analyse und Prozessvergleich binärer Kraftwerke (2006)
    Deutsches GeoForschungsZentrum GFZ
    In:  Scientific Technical Report STR
    Details
    Publication Date: 2021-08-21
    Description: Die tiefe Geothermie in Deutschland erschließt Reservoirs in 3 bis 5 km Tiefe mit Temperaturen von 100 °C bis 200°C. Für die Wandlung dieser Niedertemperaturwärme in elektrische Energie kommen voraussichtlich nur Kraftwerke mit Sekundärkreislauf in Frage. Die zwei zur Zeit verfügbaren Systeme, der Organic Rankine Cycle (ORC) und der Kalina-Prozess werden analysiert und bewertet. Die aus den Wasserdampfprozessen bekannten Methoden zur Verbesserung des Wirkungsgrades werden hinsichtlich ihrer Übertragbarkeit geprüft, alternative Möglichkeiten der Verbesserung untersucht und daraus praktikable Vorgehensweisen beim Entwurf der Prozesse entwickelt.
    Language: German
    Type: info:eu-repo/semantics/doctoralThesis
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  • 10
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    Regularisierung unter Berücksichtigung von Residuentoleranzen (2006)
    Deutsches GeoForschungsZentrum GFZ
    In:  Scientific Technical Report STR
    Details
    Publication Date: 2021-08-21
    Language: German
    Type: info:eu-repo/semantics/doctoralThesis
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