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  • Books  (4)
  • Other Sources  (394)
  • AGU (American Geophysical Union)  (394)
  • Berlin ; Heidelberg : Springer
  • 2010-2014  (398)
  • 1940-1944
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  • Books  (4)
  • Other Sources  (394)
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  • 1
    Call number: M 12.0053
    Type of Medium: Monograph available for loan
    Pages: 262 S. , Ill., graph. Darst., Kt. , 27 cm
    ISBN: 9783642275708
    Series Statement: Acatech-Studie
    Classification:
    Hydrology
    Note: Erscheinungsjahr in Vorlageform:2012
    Location: Upper compact magazine
    Branch Library: GFZ Library
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  • 2
    Call number: M 12.0116
    Description / Table of Contents: Ziel des acatech Projektes "Georessource Wasser - Herausforderung Globaler Wandel" ist es, innovative Beiträge für die nachhaltige Bewirtschaftung von Wasserressourcen unter den Bedingungen des Globalen Wandels zu erarbeiten und den Wissenstransfer zwischen Wissenschaft, Wirtschaft und Gesellschaft zu unterstützen. Der räumliche Fokus des Projektes liegt einerseits auf sensitiven Regionen in Deutschland, das heißt Gebieten, in denen Probleme im Wassersektor bestehen oder absehbar sind und andererseits wird die globale Verflechtung Deutschlands betrachtet. Zentrales Ergebnis des Projektes sind an verschiedene Zielgruppen - Wissenschaft, Wissenschaftspolitik, Wirtschaft, Politik und allgemeine Öffentlichkeit - gerichtete Empfehlungen.
    Type of Medium: Monograph available for loan
    Pages: 58 S. : Ill., graph. Darst., Kt.
    ISBN: 9783642275685
    Series Statement: acatech Position
    Classification:
    Hydrology
    Location: Upper compact magazine
    Branch Library: GFZ Library
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  • 3
    Call number: M 11.0336
    Type of Medium: Monograph available for loan
    Pages: XVI, 363 S. , Ill., graph. Darst. , 24 cm
    ISBN: 9783642122996
    Series Statement: GeoPlanet : earth and planetary sciences
    Classification:
    Seismology
    Location: Upper compact magazine
    Branch Library: GFZ Library
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  • 4
    Call number: M 12.0005
    Type of Medium: Monograph available for loan
    Pages: XI, 213 S. , Ill., graph. Darst. , 29 cm
    ISBN: 9783642196294 , 3-642-19629-2
    Classification:
    Geodynamics
    Note: Online-Ausg. Multiscale and Multiphysics Processes in Geomechanics
    Location: Upper compact magazine
    Branch Library: GFZ Library
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  • 5
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    AGU (American Geophysical Union)
    In:  Journal of Geophysical Research: Oceans, 96 (C1). pp. 821-827.
    Publication Date: 2017-07-20
    Description: The seasonal variation of the intrusion of the Philippine Sea Water into the South China Sea was studied by analyzing the historical hydrographic station data in the northern South China Sea and the Philippine Sea. Water masses at 150, 200, and 250 m were classified by discriminant analysis according to their temperature-salinity characteristics. At each depth, most water in the study region was classified into two groups representing the Philippine Sea Water and the South China Sea Water, respectively. The geographic distribution of water masses in the South China Sea shows that the Philippine Sea Water was present along the continental margin south of China between October and January. A westward current in the northern South China Sea in winter was inferred from the distribution of the intrusion water.
    Type: Article , PeerReviewed
    Format: text
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  • 6
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    AGU (American Geophysical Union)
    In:  Tectonics, 8 (3). pp. 497-516.
    Publication Date: 2017-11-01
    Description: Multichannel seismic reflection data were used to determine the evolutionary history of the forearc region of the central Aleutian Ridge. Since at least late Miocene time this sector of the ridge has been obliquely underthrust 30° west of orthogonal convergence by the northwestward converging Pacific plate at a rate of 80–90 km/m.y. Our data indicate that prior to late Eocene time the forearc region was composed of rocks of the arc massif thinly mantled by slope deposits; the forearc region probably lacked both major depositional basins and a tectonically attached accretionary prism of offscraped oceanic deposits. Beginning in latest Miocene or earliest Pliocene time, a zone of outer-arc structural highs and a forearc basin began to form. Formation of these companion intraarc structures may be linked to the late Neogene growth of an accretionary wedge that formed as the result of the deposition of a thick turbidite wedge in the Aleutian Trench. Initial structures of the zone of outer-arc highs formed as the thickening wedge underran, compressively deformed, and uplifted the seaward edge of the arc massif above a landward dipping backstop thrust. Forearc basin strata ponded arcward of the elevating zone of outer-arc highs. However, most younger structures of the zone of outer-arc highs cannot be ascribed simply to the orthogonal effects of an underrunning wedge. Oblique convergence created a major right-lateral shear zone (the Hawley Ridge shear zone) that longitudinally disrupted the zone of outer-arc highs, truncating the seaward flank of the forearc basin and shearing the southern limb of Hawley Ridge, an exceptionally large antiformal outer-arc high structure. Slivers of forearc basement rocks and overlying strata have been transported along the shear zone that is flanked by differentially elevated structures attributed to localized transpressive and transtensional processes. Uplift of Hawley Ridge may be related to the thickening of the arc massif by westward directed basement duplexes. In addition, the forearc is disrupted by structures transverse to the margin that occur where unusually high-stress accumulations have resulted in the rupture of repeated great earthquakes. It is likely that many ancient active margins evolved in tectonic and depositional settings similar to those of the central Aleutian Ridge. Great structural complexity, including the close juxtaposition of coeval structures recording compression, extension, differential vertical movements, and strike-slip displacement, should be expected, even within areas of generally kindred tectonostratigraphic terranes.
    Type: Article , PeerReviewed
    Format: text
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  • 7
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    AGU (American Geophysical Union)
    In:  Geophysical Research Letters, 8 (5). pp. 469-472.
    Publication Date: 2017-11-20
    Description: Several geochemical anomalies were observed before the Haichen, Longling, Tangshan, and Songpan earthquakes and their strong aftershocks. They included changes in groundwater radon levels; chemical composition of the groundwater (concentration of Ca++, Mg++, Cl−, SO4= and HCO3− ions); conductivity; and dissolved gases such as H2, CO2, etc. In addition, anomalous changes in water color and quality were observed before these large earthquakes. Before some events gases escaped from the surface, and there were reports of "ground odors" being smelled by local residents. The large amount of radon data can be grouped into long-term and short-term anomalies. The long-term anomalies have a radon emission build up time of from a few months to more than a year. The short-term anomalies have durations from a few hours or less to a few months.
    Type: Article , PeerReviewed
    Format: text
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  • 8
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    AGU (American Geophysical Union)
    In:  Global Biogeochemical Cycles, 1 (2). pp. 155-161.
    Publication Date: 2018-04-19
    Description: Until reliable procedures have been developed to preserve the phosphorus contained in particulate matter captured by in situ pumps and sediment traps and until these procedures are applied over a wide range of locations and depths in the sea, indirect methods will have to be used to determine the C/P ratio in marine detritus. We have taken two such approaches: (1) the use of C/N ratios for particulates captured in the upper thermocline in conjunction with 02/P and N/P ratios obtained from deconvolutions of ocean chemical data and (2) regression along isopycnals in the deep‐sea waters free of fossil fuel CO2. While neither approach yields a definitive answer, both suggest that a value of 127 carbon atoms per phosphorus atom would be a more appropriate interim value than that of 106 adopted long ago by A. C. Redfield and his associates.
    Type: Article , PeerReviewed
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  • 9
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    AGU (American Geophysical Union) | Wiley
    In:  Geochemistry, Geophysics, Geosystems, 14 (6). pp. 1693-1702.
    Publication Date: 2017-01-09
    Description: Axial volcanic ridges (AVRs) are found on most slow-spreading mid-ocean ridges and are thought to be the main locus of volcanism there. In this study we present high-resolution mapping of a typical, well-defined AVR on the Mid-Atlantic Ridge at 45°N. The AVR is characterized by “hummocky terrain,” composed typically of hummocks with pillowed or elongate pillowed flanks with pillowed or lobate lava flow summits, often with small haystacks sitting on their highest points. The AVR is surrounded by several areas of “flat seafloor,” composed of lobate and sheet lava flows. The spatial and morphological differences between these areas indicate different eruption processes operating on and off the AVR. Volcanic fissures are found all around and on the AVR, although those with the greatest horizontal displacement are found on the ridge crest and flat seafloor. Clusters of fissures may represent volcanic vents. Extremely detailed comparisons of sediment coverage and examination of contact relations around the AVR suggest that many of the areas of flat seafloor are of a similar age or younger than the hummocky terrain of the AVR. Additionally, all the lavas surveyed have similar degrees of sediment cover, suggesting that the AVR was either built or resurfaced in the same 50 ka time frame as the flat seafloor.
    Type: Article , PeerReviewed
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  • 10
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    AGU (American Geophysical Union)
    In:  Journal of Geophysical Research: Oceans, 116 (C8). C08032.
    Publication Date: 2017-10-24
    Description: The Norwegian Atlantic Current (NwAC) and its eddy field are examined using data from surface drifters. The data set used spans nearly 20 years, from June 1991 to December 2009. The results are largely consistent with previous estimates, which were based on data from the first decade only. With our new data set, statistical analysis of the mean fields can be calculated with larger confidence. The two branches of the NwAC, one over the continental slope and a second further offshore, are clearly captured. The Norwegian Coastal Current is also resolved. In addition, we observe a semipermanent anticylonic eddy in the Lofoten Basin, a feature seen previously in hydrography and in models. The eddy kinetic energy (EKE) is intensified along the path of the NwAC, with the largest values occurring in the Lofoten Basin. The strongest currents, exceeding 100 cm s−1, occur west of Lofoten. Lateral diffusivities were computed in five domains and ranged from 1–5 × 107 cm2 s−1. The Lagrangian integral time and space scales are 1–2 days and 7–23 km, respectively. The data set allows studies of seasonal and interannual variations as well. The strongest seasonal signal is in the NwAC itself, as the mean flow strengthens by approximately 20% in winter. The EKE and diffusivities on the other hand do not exhibit consistent seasonality in the sampled regions. There are no consistent indications of changes in either the mean or fluctuating surface velocities between the 1990s and 2000s.
    Type: Article , PeerReviewed
    Format: text
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