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  • 1
    Call number: SR 90.0008(78-8)
    In: Paper
    Type of Medium: Series available for loan
    Pages: 27 S.
    ISBN: 0660100622
    Series Statement: Paper / Geological Survey of Canada 78-8
    Language: English
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 2
    Series available for loan
    Series available for loan
    Hanover, NH : Corps of Engineers, U.S. Army, Cold Regions Research and Engineering Laboratory,
    Associated volumes
    Call number: ZSP-202-329
    In: Research report
    Description / Table of Contents: CONTENTS: General Introduction. - Part I. Spatial and temporal variations in sea ice deformatfon. - Introduction. - Approach. - Site location and data collection procedures. - Data analysis. - Strain results. - Comparison of mesoscale deformation with macroscale deformation. - Nature of the ice pack rotation. - Conciusion. - Literature cited. - Part Il. Comparison of mesoscale strain measurements with linear drift theory predictions. - Introduction. - List of symbols. - Linear drift equations. - Ice drift solutions. - Comparison of theory with mesoscale measurements. - A more general linear constitutive law. - Conclusions. - Literature cited. - Appendix Relative magnitudes of differential drift forces. - Abstract.
    Description / Table of Contents: Measurements of mesoscale sea ice deformation over a region approximately 20 km in diameter were made over a five-week period in the spring of 1972 at the main AIDJEX camp in the Beaufort Sea. They have been analyzed to determine nonlinearities in the ice velocity field (due to the discrete small-scale nature of the ice pack), as well as a continuum mode of deformation represented by a least squares strain rate tensor and vorticity. The deformation rate time series between Julian day 88 and 113 exhibited net areal changes as large as 3% and deformation rates up to 0.16% per hour. In the principal axis coordinate system, the strain rate typically exhibited a much larger compression (or extension) along one axis than along the other. Persistent cycles at ~12-hour wavelengths were observed in the divergence rate. A comparison of the average residual error with the average strain rate magnitude indicated that strains measured on a scale of 10 km or greater can serve as a valid measure of the continuum motion of the sea ice. This conclusion is also substantiated by a comparison between the mesoscale deformation, and macroscale deformation measured over a ~100-km-diameter region. Vorticity calculations indicate that at low temporal frequencies ( 〈 0.04 hr^-1 ) the whole mesoscale array rotates essentially as an entity and consequently the low frequency vorticity can accurately be estimated from the rotation of a single floe. (Part I) A comparison of mesoscale strain measurements with the atmospheric pressure field and the wind velocity field indicated that the ice divergence rate and vorticity followed the local pressure and wind divergence with significant correlation. For low atmospheric pressures and converging winds, the divergence rate was negative with the vorticity being counterclockwise. The inverse behavior was observed for high pressures and diverging winds. This behavior agreed with predictions based upon the infinite boundary solution of a linearized drift theory in the absence of gradient current effects and using the constitutive law proposed by Glen for pack ice. The best least squares values of the constitutive law parameters [Eta] and [Zeta] were found to be given by ~10^12 kg sec^-1. Using typical divergence rates, these values yielded compressive stresses of the magnitude of 10^5 N m^-1, which are similar to values suggested by the Parmerter and Coon ridge model. In general, the infinite boundary solution of the linear drift equation indicates that in a low pressure region that is reasonably localized in space, the ice would be expected to converge for high compactness (winter) and diverge for low compactness (summer). Calculations were also carried out using a more general linear viscoelastic constitutive law that includes memory effects and that includes a generalized Hooke's law as well as the Glen law as special cases. A best fit of this more general calculation with strain measurements indicates, overall, a better agreement with viscous behavior than with elastic behavior, with the frequency behavior of the estimated "viscosities" similar to the Glen law behavior at temporal frequencies less than ~0.01 hr^-1 (Part II)
    Type of Medium: Series available for loan
    Pages: v, 37 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 329
    Language: English
    Branch Library: AWI Library
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  • 3
    Call number: SR 90.0008(74-17)
    In: Paper
    Type of Medium: Series available for loan
    Pages: V, 44 S. + 3 pl.
    Series Statement: Paper / Geological Survey of Canada 74-17
    Language: English
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 4
    Description / Table of Contents: Ireland is virtually encircled by sedimentary basins which developed in response to periods of rifting and thermal subsidence. These offshore basins have been the focus of intermittent phases of exploration since drilling of the first well in 1970 and, to date, 136 wells have been drilled. Most of the drilling so far has concentrated on structural traps, but recent exploration has begun to focus on a variety of stratigraphic traps, with greater emphasis on results obtained from studies of the Atlantic margin basins. The Petroleum Exploration of Ireland's Offshore Basins contains a set of 27 papers on a wide range of topics relating to recent exploration of the Irish offshore sedimentary basins. These papers address aspects of the structural and stratigraphic evolution, thermal history, petroleum systems, reservoir geology and sea-bed processes in the Irish offshore area. Although the main focus is on petroleum systems and those issues bearing on exploration risk, the exploration effort has yielded fundamental new insight into the wider development of starved passive continental margins. The volume will be of interest to oil industry explorationists and researchers focusing on NW European sedimentary basins and the evolution of the Irish Atlantic margin.
    Pages: Online-Ressource (473 Seiten)
    ISBN: 1862390878
    Language: English
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  • 5
    Description / Table of Contents: This special issue of Pure and Applied Geophysics is one of two volumes containing an augmented collection of papers originating from the Evison Symposium on Seismogenesis and Earthquake Forecasting held in Wellington, New Zealand, in February 2008. The volumes honor Frank Evison's interest in earthquake generation and forecasting. A biography of Frank Evison and a list of his publications is included, as well as review papers and new research papers in the field. The volume includes papers related to Frank's most abiding interest of precursory earthquake swarms. The research contributions cover a range of current forecasting methods such as the Epidemic-Type Aftershock model, the Every Earthquake a precursor According to Scale model, Pattern Informatics, Reverse Tracing of Precursors, stochastic models of elastic rebound, and methods for handling multiple precursors. The methods considered employ a variety of statistical approaches to using previous seismicity to forecast future earthquakes, including regional and global earthquake likelihood models and alarm-type forecasts. The forecast time-frames of interest range from the short time-frame associated with clustering of aftershocks to the long time-frame associated with recurrence of major earthquakes. A recurring theme is the assessment of forecasting performance, whether by likelihood scores, skill scores, error diagrams, or relative operating characteristic tests. The volume will be useful to students and professional researchers who are interested in the earthquake preparation process and in converting that understanding into forecasts of earthquake occurrence.
    Pages: Online-Ressource (250 Seiten)
    ISBN: 9783034604970
    Language: English
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  • 6
    Description / Table of Contents: Over long periods of time the tectonic evolution of the solid Earth has been recognized as the major control on the development of the global climate system. Tectonic activity acts in one of two different ways to influence regional and global climate: (i) through the opening and closing of oceanic gateways and its effect on the circulation patterns in the global ocean; (ii) through the growth and erosion of orogenic belts, resulting in changes in oceanic chemistry and disruption of atmospheric circulation. The Arabian Sea region has several features that make it the best area for studies of climate and palaeoceanographic responses to tectonic activity, most notably in the context of the South Asian monsoon and its relationship to the growth of high topography in the adjacent Himalayas and Tibet. The Tectonic and Climatic Evolution of the Arabian Sea Region brings together a collection of recent studies on the area from a wide group of international contributors. The paper range from high resolution, Holocene palaeoceanographic studies of the Pakistan margin to regional tectonic reconstructions of the ocean basin and surrounding margins throughout the Cenozoic. Marine geophysics, stratigraphy, isotope chemistry and neotectonics come together in a multidisciplinary approach to the study of interactions of land and sea. while much work remains to be done to understand fully the tectonic and climatic evolution of the Arabian Sea, a great deal has been achieved since the last major review, as detailed in the 26 contributions. This volume is essential reading for palaeoceanographers, sedimentologists and geophysicists. It will also be interest to structural geologists and those working in the petroleum industry.
    Pages: Online-Ressource (525 Seiten)
    ISBN: 1862391114
    Language: English
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  • 7
    Description / Table of Contents: This special issue of Pure and Applied Geophysics is the second of two volumes containing an augmented collection of papers originating from the Evison Symposium on Seismogenesis and Earthquake Forecasting held in Wellington, New Zealand, in February 2008. The volumes honor Frank Evison's interest in earthquake generation and forecasting. This volume includes descriptions of earthquake forecasting test centers through the Collaboratory for the Study of Earthquake Predictability (CSEP) program and the first results from the Regional Earthquake Likelihood Model (RELM) experiment in California. Other papers discuss methods of testing predictions, in particular by the use of error diagrams. There is discussion of prediction methodologies using seismicity, including an application of the statistical technique of Hidden Markov Models to identify changes in seismicity and a new technique for identifying precursory quiescence. Several papers employ other data besides seismicity, such as geologically determined faults, calculations of stress changes via Coulomb stress modeling, tomographically determined velocity structure, groundwater, crustal deformation, and comparisons of real earthquakes to synthetic seismicity determined from hypothesized earthquake physics. One paper focuses on the prediction of human casualties in the event that a large earthquake occurs anywhere on the globe. The volume will be useful to students and professional researchers who are interested in the earthquake preparation process and in converting that understanding into forecasts of earthquake occurrence.
    Pages: Online-Ressource (274 Seiten)
    ISBN: 9783034604994
    Language: English
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  • 8
    Description / Table of Contents: The Caledonides are a major orogenic belt that stretches from the Arctic, through Scandinavia, East Greenland, Britain and Ireland into the Atlantic coast of North America. Following the break-up of Rodinia, the Caledonides formed in the Palaeozoic by the drifting of various continents and their eventual aggregation in the Silurian and Devonian. The orogen subsequently fragmented during the opening of the Atlantic Ocean. This volume brings together 25 papers presenting the results of modern research that investigates the orogenic processes and the provenance of specific components of the belt. The contributions reflect different lines of research, linking traditional field studies with modern analytical techniques. In addition three overview papers summarize the main features of the belts in Scandinavia, Svalbard, East Greenland, Britain and Ireland, highlighting the advances made since the last major synthesis of the Scandinavian Caledonides 30 years ago, and discussing important open questions.
    Pages: Online-Ressource (VI, 718 Seiten)
    ISBN: 9781862393776
    Language: English
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  • 9
    Call number: AWI G5-00-0092
    In: Quaternary Science Reviews
    Type of Medium: Monograph available for loan
    Pages: S. 1-479 : Abb. ; 30 cm
    ISSN: 0277-3791
    Series Statement: Quaternary Science Reviews 19, 2000, 1-5
    Language: English
    Location: AWI Reading room
    Branch Library: AWI Library
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  • 10
    Call number: AWI A3-00-0259 ; AWI A3-18-75033
    In: NATO science series
    Type of Medium: Monograph available for loan
    Pages: XXI. 623 S. , Ill., graph. Darst., Kt
    ISBN: 0792364392
    Series Statement: NATO science series : Series 2, Environmental security vol. 70
    Language: English
    Note: Contents: Preface. - Acknowledgements. - Summary poem. - Introduction. - 1. Oceanic freshwater fluxes in the climate system / Anders Stigebrandt. - 2. Global atmospheric circulation patterns and relationships to Arctic freshwater fluxes / J. E. Walsh. - 3. Atmospheric components of the Arctic Ocean freshwater balance and their interannual variability / R. G. Barry and M. C. Serreze. - 4. Hydroclimatology of the Arctic drainage basin / L. C. Bowling, D. P. Lettenmaier and B. V. Matheussen. - 5. The Arctic Ocean's freshwater budget: sources, storage and export / Eddy C. Carmack. - 6. The Arctic ocean freshwater budget of a climate general circulation model / Howard Cattle and Douglas Cresswell. - 7. Atmospheric components of the Arctic Ocean bydrologic budget assessed from Rawinsonde data / M. C. Serreze and R. G. Barry. - 8. Reanalyses depictions of the Arctic atmospheric moisture budget / D. H. Bromwich, R. I. Cullather and M. C. Serreze. - 9. Moisture transport to Arctic drainage basins relating to significant precipitation events and cyclogenesis / John R. Gyakum. - 10. Atmospheric climate models: simulation of the Arctic Ocean fresh water budget components / V. M. Kattsov, J. E. Walsh, A. Rinke and K. Dethloff. - 11. Discharge observation networks in Arctic regions: computation of the river runoff into the Arctic Ocean, its seasonality and variability / W. E. Grabs, F. Portmann and T. de Couet. - 12. Arctic river flow: a review of contributing areas / I. A. Shiklomanov, A. I. Shiklomanov, R. B. Lammers, B. J. Peterson and C. J. Vorosmarty. - 14. River input of water, sediment, major ions, nutrients and trace metals from Russian territory to the Arctic Ocean / V. V. Gordeev. - 15. The dispersion of Siberian river flows into coastal waters: meteorological, hydrological and hydrochemical aspects / I. P. Semiletov, N. I. Savelieva, G. E. Weller, I. I. Pipko, S. P. Pugach, A. Yu. Gukov and L. N. Vasilevskaya. - 16. The variable climate of the Mackenzie River basin: its water cycle and fresh water discharge / R. E. Stewart. - 17. Arctic estuaries and ice: a positive-negative estuarine couple / R. W. Macdonald. - 18. Satellite views of the Arctic Ocean freshwater balance / D. A. Rothrock, R. Kwok and D. Groves. - 19. Tracer studies of the Arctic freshwater budget / P. Schlosser, B. Ekwurzel, S. Khatiwala, B. Newton, W. Maslowski and S. Pfirman. - 20. Exchanges of freshwater through the shallow straits of the North American Arctic / Humfrey Melling. - 21. The transformations of Atlantic water in the Arctic Ocean and their significance for the freshwater budget / Bert Rudels and Hans J. Friedrich. - 22. Modelling the variability of exchanges between the Arctic Ocean and the Nordic seas / Rüdiger Gerdes. - 23. Sea ice growth, melt and modeling: a survey / Michael Steele and Gregory M. Flato. - 24. Fresh water freezing/melting cycle in the Arctic Ocean / G. V. Alekseev, L. V. Bulatov and V. F. Zakharov. - Colour plates. - Subject index.
    Location: AWI Reading room
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