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  • 1980-1984  (49,776)
  • 1970-1974  (36,338)
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  • 1
    Call number: MOP Per 807(32)
    In: Precipitation Enhancement Project report
    Type of Medium: Monograph available for loan
    Pages: 67 S. : Ill.
    Series Statement: Precipitation Enhancement Project report 32
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 2
    Series available for loan
    Series available for loan
    Washington, DC : United States Gov. Print. Off.
    Associated volumes
    Call number: SR 90.0002(655-C)
    In: Professional paper
    Type of Medium: Series available for loan
    Pages: III, C-13 S.
    Series Statement: U.S. Geological Survey professional paper 655-C
    Language: English
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 3
    Series available for loan
    Series available for loan
    Ottawa : Geological Survey of Canada
    Associated volumes
    Call number: SR 90.0008(70-20)
    In: Paper
    Type of Medium: Series available for loan
    Pages: IV, 8 S. + 1 pl.
    Series Statement: Paper / Geological Survey of Canada 70-20
    Language: English
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 4
    Monograph available for loan
    Monograph available for loan
    Leningrad : Gidrometeoizdat
    Call number: AWI G7-82-0934
    Type of Medium: Monograph available for loan
    Pages: 191 S. : Abb. ; 23 cm
    Branch Library: AWI Library
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  • 5
    Monograph available for loan
    Monograph available for loan
    Leipzig : Brockhaus
    Call number: AWI E2-84-0766
    Type of Medium: Monograph available for loan
    Pages: 272 S.: Fototaf. + 1 Kte. ; 21 cm
    Branch Library: AWI Library
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  • 6
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-83/19
    In: CRREL Report, 83-19
    Description / Table of Contents: Small-scale laboratory experiments were conducted on model bridge piers in the CRREL test basin. The experiments were performed by pushing model ice sheets against structures and monitoring the ice forces during the ice/structure interaction. The parameters, varied during the test program, were the geometry of the bridge piers and the velocity, thickness, and flexural strength of the ice. The results are presented in the form of ice forces on sloping and vertical structures with different geometries. During ice action on sloping structures, a phenomenon of transition of failure mode from bending to crushing was observed as the ice velocity was steadily increased.
    Type of Medium: Series available for loan
    Pages: 17 Seiten , Illustrationen
    Series Statement: CRREL Report 83-19
    Language: English
    Note: CONTENTS Abstract Preface Introduction Tests Results Ice forces on inclined structures Transition of ice action due to velocity increase Aspect ratio Bridge pier nose geometry Conclusions Literature cited
    Location: AWI Archive
    Branch Library: AWI Library
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  • 7
    Monograph available for loan
    Monograph available for loan
    Amsterdam : North-Holland Publ. Co.
    Associated volumes
    Call number: MOP S 9993
    In: Journal of crystal growth
    Type of Medium: Monograph available for loan
    Pages: 21-31
    Series Statement: Journal of crystal growth
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 8
    Series available for loan
    Series available for loan
    Hanover, New Hampshire : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-82/34
    In: CRREL Report, 82-34
    Description / Table of Contents: The ice discharge through an opening in an ice control structure was documented to be a function of the floe size, ice type, ice floe conditions and vessel direction. The model data for the average ice discharge per vessel transit scaled to prototype values compared favorably with data taken at the St. Marys River ice control structure (ICS). The model results of the force measurements were also consistent with data taken at the St. Marys ICS. The dynamic loading conditions were independent of vessel direction. The dynamic loading to the structure using 3 types of ice (plastic, natural and urea-doped) showed a considerable difference in their means and standard deviations. The urea-doped ice was evaluated for dynamic loading conditions, and reasonable peak values of 3 to 5 times the mean load at each measuring position were recorded, independent of vessel direction. It appears that synthetic random ice floes may be used in model studies where ice discharge through an opening in a structure needs to be documented. This study shows the synthetic random ice floe discharge to fall reasonably within the values obtained for natural ice discharge for both rafted and non-rafted ice fields above the ICS. However, the question of whether synthetic ice can be used for analyzing force distributions and dynamic force loading criteria cannot be fully answered at this time because the load distributions of the synthetic and natural floes appear to differ.
    Type of Medium: Series available for loan
    Pages: 68 Seiten , Illustrationen
    Series Statement: CRREL Report 82-34
    Language: English
    Note: CONTENTS Abstract Preface Introduction Scope of work Ice discharge from Lake Huron into St. Clair River Water velocity profiles at Port Huron Ice conditions Physical model Basis for selection Description Instrumentation Model ice control structure Open water calibration Open water tests Experimental procedures and techniques Ice cover calibration Ice control structure orientation Analysis of ice discharge due to ship transits Natural ice Synthetic ice Forces on the ice control structure Static measurements Dynamic force measurements Potential additional shear stresses Anticipated ice conditions with ICS Conclusions Literature cited Appendix A. Application of model results Appendix B. Suggested additional studies Appendix C. Derivation of ice discharge
    Location: AWI Archive
    Branch Library: AWI Library
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  • 9
    Call number: PIK N 456-98-0228/1
    In: Entwicklung von Klimamodellen ; Forschungsbericht 104 02 612
    Type of Medium: Monograph available for loan
    Pages: 27 S.
    Series Statement: Entwicklung von Klimamodellen Forschungsbericht 104 02 612
    Branch Library: PIK Library
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  • 10
    Call number: ZSP-202-315
    In: Research report
    Description / Table of Contents: CONTENTS: Preface. - Introduction. - Part 1:Mesoscale strain measurements on the Beaufort Sea pack ice. - Abstract. - Introduction. - Previous work. - Site location. - Results. - Correlation of synoptic aerial photography with measured strains. - Correlation of estimated wind stress and strain. - Conclusions. - Literature cited. - Part II: Structure of a multiyear pressure ridge. - Abstract. - Introduction. - Profiles. - Internal properties. - Largest ridge sail. - Conclusions. - Literature cited. - Part III: Top and bottom roughness of a multiyear ice floe. - Abstract. - Introduction. - Results. - Literature cited. - Part IV:Airphoto analysis of ice deformation in the Beaufort Sea Abstract. - Introduction. - Study area. - Method of analysis. - Ice deformations. - Net deformational changes. - Pressure ridge distribution. - Summary and conclusions. - Literature cited. - Part V: Data on morphological and physical characteristics of sea ice in the Beaufort Sea.
    Description / Table of Contents: The report is in five parts. Part I, Mesoscale Strain Measurements on the Beaufort Sea Pack Ice: Fracture (lead and crack) orientations in first-year ice indicate correlation with the orientation of the strain rate ellipse. A qualitative relation is suggested between the fracture density and the long-term divergence rate. Correlation was also observed between the divergence of the wind field, as computed from the surface pressure field, and the ice divergence. Part II, Structure of a Multiyear Pressure Ridge: Three transverse profiles were measured across a ľarge pressure ridge in the Beaufort Sea. The ridge sail extended 4 m above sea level and the keel 13 m below. The cross sections of the keel were roughly semicircular, suggesting that form drag coefficients for flow transverse to the long axes of multiyear ridges may be as high as 0.8. Part III, Top and Bottom Roughness of a Multiyear Ice Floe: A spectral study of the snow and ice topography of a multiyear floe showed that the snow cover attenuates the roughness amplitude of the ice surface but does not cover it completely. The snow surface variance is lower than the ice surface variance by a factor of 1/3 to 1/4. The correlation between snow and ice surface roughness is significant for long wavelengths (〉 8 m) but not for short wavelengths (〈 4 m). The ice sheet as a whole is in free-floating, isostatic equilibrium, but pronounced local deviations from isostatic equilibrium are common. Part IV, Air Photo Analysis of Sea Ice Deformation in the Beaufort Sea: The time, direction and magnitude of deformational motion were determined by combining observations of the changes in features related to ice deformation (leads, fractures, pressure ridges) with mesoscale measurements of strains and strain rates on the ice. Part V, Data on Morphological and Physical Characteristics of Sea Ice in the Beaufort Sea: Measurements of the size of ice blocks in newly formed pressure ridges and measurements of salinity and temperature are presented.
    Type of Medium: Series available for loan
    Pages: iii, 66 S. : Ill., graph. Darst., Kt.
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 315
    Branch Library: AWI Library
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