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  • 1
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    The Terrestrialization Process: Modelling Complex Interactions at the Biosphere-Geosphere Interface (2010)
    London : The Geological Society
    Details
    Description / Table of Contents: The invasion of the land by plants (‘terrestrialization’) was one of the most significant evolutionary events in the history of life on Earth, and correlates in time with periods of major palaeoenvironmental perturbations. The development of a vegetation cover on the previously barren land surfaces impacted on the global biogeochemical cycles and the geological processes of erosion and sediment transport. The terrestrialization of plants preceded the rise of major new groups of animals, such as insects and tetrapods, the latter numbering some 24 000 living species, including ourselves. Early land-plant evolution also correlates with the most spectacular decline of atmospheric CO2 concentration of Phanerozoic times and with the onset of a protracted period of glacial conditions on Earth. This book includes a selection of papers covering different aspects of the terrestrialization, from palaeobotany to vertebrate palaeontology and geochemistry, promoting a multidisciplinary approach to the understanding of the co-evolution of life and its environments during Early to Mid-Palaeozoic times.
    Pages: Online-Ressource (187 Seiten)
    ISBN: 9781862393097
    URL: http://sp.lyellcollection.org/content/vol339/issue1/
    Language: English
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    E-BOOK
  • 2
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    Quantitative and qualitative effects of a forced resource efficiency strategy : summary report of task 5 within the framework of the "Material efficiency and resource conservation" (MaRess) project (2010)
    Wuppertal : Wuppertal Institut für Klima, Umwelt, Energie | Wuppertal : Wuppertal Institut für Klima, Umwelt, Energie
    Details
    Publication Date: 2022-02-18
    Keywords: ddc:320
    Repository Name: Wuppertal Institut für Klima, Umwelt, Energie
    Language: English
    Type: workingpaper , doc-type:workingPaper
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  • 3
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    AIDA – From Airborne Data Inversion to In-Depth Analysis (2011)
    In:  GEOTECHNOLOGIEN Science Report
    Details
    Publication Date: 2020-02-12
    Language: English
    Type: info:eu-repo/semantics/conferenceObject
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  • 4
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    Helicopter-borne electromagnetics (HEM) at the Elbe estuary in Northern Germany (2011)
    In:  Protokoll über das 24. Schmucker-Weidelt-Kolloquium für Elektromagnetische Tiefenforschung
    Details
    Publication Date: 2020-02-12
    Description: Helicopter-borne electromagnetic investigations provide a high potential for a comprehensive mapping of the upper hundred metres of the subsurface. The relevance for hydrogeological questions is given by the determination of resistivity models for revealing the distribution of sandy and clayey as well as saltwater and freshwater saturated sediments. The survey area to the north-west of the City of Hamburg covers the estuary of the Elbe river. Here, the aquifers and their potential salinization were intended to be mapped. Parts of the results of this survey area are involved in the project KLIMZUG-NORD, in which the Technical University Hamburg-Harburg investigates the environmental effects of climate change on the estuary of the Elbe river. Due to current climate change scenarios a sea level rise in the North-Sea region is predicted and, consequently, the water level of the Elbe river will rise in an area affected by a changing sea level. That entails an intrusion of brackish water into the surrounding freshwater aquifers. Such scenarios are investigated by hydraulic flow models. Existing geological information will be complemented spatially by electrical resistivity models derived from HEM data to a geological structural model. This will be related to hydrological parameters and should therefore serve as a base for a hydraulic modelling.
    Language: English
    Type: info:eu-repo/semantics/conferenceObject
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  • 5
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    SURFTRAP - Development and Optimisation of a Process to Biosynthesize Reactive Iron Mineral Surfaces for Water Treatment Purposes (2010)
    In:  GEOTECHNOLOGIEN Science Report
    Details
    Publication Date: 2020-02-12
    Description: In this project we aim to develop a low-cost technology to remove ionic constituents from raw waters such as arsenic species. The proposed technology is based on the reactivity of schwertmannite, an oxyhydroxosulfate of the mean stochiometry Fe8O8(OH)6SO4 (molar mass 772.89 g/mol). This mineral typically forms in acidic and sulfate rich mine waters as a secondary mineral upon oxidation of Fe(II) in a biologically mediated process. Schwertmannite can be generated in a biotechnological process after aeration of mining process waters. It forms surface-rich aggregates of needle-like nanocrystals. It rapidly transforms into ferric hydroxides of high specific surface area once exposed to water containing at least some alkalinity. Our rationale follows the concept to make use of this transformation reaction by adding biosynthesized schwertmannite to contaminated raw waters where it generates a large sorption capacity to remove the pollutants (Peiffer et al., 2008).
    Language: English
    Type: info:eu-repo/semantics/conferenceObject
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  • 6
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    Tomographic Methods in Hydrogeology (2011)
    In:  GEOTECHNOLOGIEN Science Report
    Details
    Publication Date: 2020-02-12
    Description: The extraction of groundwater for drinking water purposes is one of the most important uses of the natural subsurface. Sustainable management of groundwater resources requires detailed knowledge of the hydraulic properties of the subsurface. Typically, these properties are not directly accessible. We are convinced that the evaluation of hydraulic properties necessitates applying hydraulic stimuli (e.g., injection and extraction of groundwater, tracer tests, etc.). In this context, tomographic assemblies and inversion strategies originally derived for geophysical surveying and meteorological data assimilation can be transferred to hydraulic applications. In addition, time-lapse geophysical surveying techniques may be used to monitor hydraulic tests. The latter requires fully coupled hydrogeophysical inversion strategies, accounting for the entire process chain from hydraulic properties via flow and transport to the geophysical surveying program. The current project includes: (1) the development of a geostatistical inversion method for transient tomographic data of multiple hydraulic investigation techniques including the geoelectrical monitoring of salt-tracer experiments using the 4-D variational approach, (2) the comparison of this method to the inversion of temporal moments, (3) the model-based optimal design of tomographic surveys, (4) the development of modular assessment equipment for efficient execution of tomographic surveys in a hydrogeological context, (5) the performance of tomographic field tests at the research site Lauswiesen in Tübingen using the model-based design and providing data for the inversion.
    Language: English
    Type: info:eu-repo/semantics/conferenceObject
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  • 7
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    Macroeconomic modelling of sustainable development and the links between the economy and the environment : final report (2012)
    Osnabrück : Ges. für Wirtschaftliche Strukturforschung | Wuppertal : Wuppertal Institut für Klima, Umwelt, Energie
    Details
    Publication Date: 2018-11-19
    Keywords: ddc:600
    Repository Name: Wuppertal Institut für Klima, Umwelt, Energie
    Language: English
    Type: report , doc-type:report
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  • 8
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    The near infrared activity of Sagittarius A* (2010)
    Univ. Köln
    Details
    Publication Date: 2021-03-29
    Description: The meaning of my thesis was to obtain new insights about the supermassive Black Hole in the center of our Milky Way and its accretion flow. The non-thermal radio, X-ray, and near-infrared source Sagittarius A* (Sgr A*) is the electro-magnetic manifestation of the Black Hole. Sgr A* is a unique source to study the accretion onto a very massive compact object as it is the closest galactic nucleus. For this work I conducted observations as well as theoretical computations. The near-infrared camera CONICA in combination with the adaptive optics device NAOS at ESO's Very Large Telescope in Chile were used for the observations. The goal of our group was in particular to find further evidence for a quasi-periodic signal of ~17 minutes in radiation outbursts from Sgr A* that has been reported for the first time in 2003. The radiation outbursts - most often termed `flares' - are periods of ~50 - 130 minutes in which the flux of Sgr A* in the near-infrared rises up to a factor of ten. The quasi-periodic sub-structure thereby manifests itself as sub-flares with a constant separation superimposed on the larger, underlying flare. In 2005 and 2006 we were able to detect a significant periodicity, hence the previous findings are supported ...
    Description: thesis
    Keywords: 522 ; TBG 000 ; THK 000 ; Infrarot-Astronomie ; Spektren und Spektroskopie von Sternen {Astronomie}
    Language: English
    Type: monograph , publishedVersion
    Format: 125 S.
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  • 9
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    CHICAGO (2010)
    GFZ, Helmholtz-Zentrum
    Details
    Publication Date: 2021-03-29
    Description: This report describes the set-up, logistics and results of the CHICAGO (Chilean Coastal AeroGeophysical Observations) survey. It gives a short overview about the scientific intentions, detailed documentation of all technical aspects starting from the survey equipment via the aircraft installation to the GPS stations set-up and the experiences in flight. All processing results for the individual profiles are discussed in detail. Finally, the data is compared and combined with available recent marine gravity data and altimetry derived solutions.
    Description: report
    Keywords: 551 ; TQH 000 ; TSX 500 ; Aerogeophysik ; Chile {Geophysik}
    Language: English
    Type: article , publishedVersion
    Format: 100 S.
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    CITATION GEO-LEO
  • 10
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    Airborne navigation and gravimetry ensemble & laboratory (2010)
    GFZ, Helmholtz-Zentrum
    Details
    Publication Date: 2021-03-29
    Description: The LaCoste & Romberg gravity meter S124b and its associated system environment were installed and tested in conjunction with a strap-down gravity meter system (SAGS) of the Bayerische Akademie der Wissenschaften in Munich on a Cessna Grand Caravan of the DLR in Oberpfaffenhofen. This report describes the design and instrumentation of the aerogravimetry system, it documents the installation on the aircraft and it discusses some of the results of the test flights performed within AGFA (Airborne Gravity Flight Approach). Beyond the documentation of the system this report gives a short introduction to the basics of the instruments including a short theory of their operation and data processing. The intention is to give readers from disciplines other than aero-gravimetry and aero-altimetry a technical insight into how the system works and what it is capable of. This should help the reader to evaluate the systems usefulness in other geo-scientific projects. The experiences from the test flights are briefly summarized and an update of the current status and future plans for the individual instruments is given. The aerogravimetry system consists of two major instrument blocks: the gravimetry sensing system and the positioning system. The gravimetry sensors are the LaCoste & Romberg S124b and the SAGS-2.2 systems. The navigation block holds GPS receivers, an inertial navigation system and a laser altimeter. The aircraft used for the primary tests was a Cessna Grand Caravan of the DLR in Oberpfaffenhofen. It offers superb conditions for scientific installations and is widely used in geophysical exploration all over the world. The test flights were flown from Oberpfaffenhofen airport. One profile covers the Bavarian Alps to map short wavelength, topography induced gravity disturbances, and another flight crosses the Rhine Graben to map long wavelength structures of the deeper crust. The software for data processing for navigation, gravimetry and geoid calculations is briefly summarized.
    Description: report
    Keywords: 551 ; TQH 000 ; Aerogeophysik
    Language: English
    Type: article , publishedVersion
    Format: 74 S.
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    CITATION GEO-LEO
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