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  • English  (186)
  • 2000-2004  (27)
  • 1975-1979  (128)
  • 1950-1954  (29)
  • 1945-1949  (2)
  • 1930-1934
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  • 1
    Series available for loan
    Series available for loan
    Canadian Mineral Occurrence Index (Canmindex) of the Geological Survey of Canada (1978)
    Ottawa : Geological Survey of Canada
    Associated volumes
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    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
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  • 2
    Series available for loan
    Series available for loan
    Differential sea ice drift (1975)
    Hanover, NH : Corps of Engineers, U.S. Army, Cold Regions Research and Engineering Laboratory,
    Associated volumes
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    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
    URL: http://www.worldcat.org/oclc/1387886
    Language: English
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  • 3
    Series available for loan
    Series available for loan
    Ontaratue River (106J), Travaillant Lake (106-O), and Canot Lake (106P) map-areas, District of Mackenzie, Northwest Territories (1975)
    Ottawa : Geological Survey of Canada
    Associated volumes
    Details Availability
    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
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  • 4
    Monograph available for loan
    Monograph available for loan
    Investigation of late Quaternary paleoceanography and paleoclimatology (1976)
    Boulder, Colo. : The Geological Society of America
    Associated volumes
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    Call number: AWI G2-17-91266
    In: Memoir / The Geological Society of America, 145
    Type of Medium: Monograph available for loan
    Pages: X, 464 S , graph. Darst., Kt , 1 Kt.-Beil., 3 Mikrofiches
    ISBN: 0813711452
    Series Statement: Memoir / The Geological Society of America 145
    Language: English
    Note: Contents: Preface. - ATLANTIC. - New transfer function for estimating past sea-surface conditions from sea-bed distribution of planktonic foraminiferal assemblages in the North Atlantic / Nilva G. Kipp. - Glacial North Atlantic 18,000 years ago: a CLIMAP reconstruction / Andrew Mclntyre and Nilva G. Kipp with Allen W. H. Bé, Thomas Crowley, Thomas Kellogg, James V. Gardner, Warren Prell, and William F. Ruddiman. - Late Quaternary climatic changes: Evidence from deep-sea cores of Norwegian and Greenland Seas / Thomas B. Kellogg. - Northeast Atlantic paleoclimatic changes over the past 600,000 years / W. F. Ruddiman and A. Mclntyre. - O18 record of the Atlantic Ocean for the entire Pleistocene Epoch / Jan van Donk. - Late Quaternary climatic record in western equatorial Atlantic sediment / Allan W. H. Bé, John E. Damuth, Leroy Lott, and Rosemary Free. - Late Pleistocene faunal and temperature patterns of the Colombia Basin, Caribbean Sea / Warren L. Prell and James D. Hays. - Responses of sea-surface temperature and circulation to global climatic change during the past 200,000 years in the eastern equatorial Atlantic Ocean / James V. Gardner and James D. Hays. - Equatorial Atlantic and Caribbean foraminiferal assemblages, temperatures, and circulation: Interglacial and glacial comparisons / Warren L. Prell, James V. Gardner, Allan W. H. Bé, and James D. Hays. - Corresponding patterns of contemporary pollen and vegetation in central North America / T. Webb III and J. H. McAndrews. - ANTARCTIC. - Relationship of radiolarian assemblages to sediment types and physical oceanography in the Atlantic and western Indian Ocean sectors of the Antarctic Ocean / Jose A. Lozano and James D. Hays. - Reconstruction of the Atlantic and western Indian Ocean sectors of the 18,000 B.P. Antarctic Ocean / James D. Hays, Jose A. Lozano, Nicholas Shackleton, and Grace Irving. - PACIFIC. - Late Quaternary sediment of the Panama Basin: Sedimentation rates, periodicities, and controls of carbonate and opal accumulation / Nicklas G. Pisias. - Late Quaternary accumulation rates of opal, quartz, organic carbon, and calcium carbonate in the Cascadia Basin area, northeast Pacific / G. Ross Heath, Ted C. Moore, Jr., and J. Paul Dauphin. - Glacial advance in the Gulf of Alaska area implied by ice-rafted material / Roland von Huene, Jim Crouch, and Edwin Larson. - Modern Pacific coccolith assemblages: Derivation and application to late Pleistocene paleotemperature analysis / Kurt R. Geitzenauer, Michael B. Roche, and Andrew Mclntyre. - Oxygen-isotope and paleomagnetic stratigraphy of Pacific core V28-239 late Pliocene to latest Pleistocene / N. J. Shackleton and N. D. Opdyke.
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  • 5
    Series available for loan
    Series available for loan
    Turbulent heat transfer in large aspect channels (1979)
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
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    Call number: ZSP-201-79/13
    In: CRREL Report, 79-13
    Description / Table of Contents: Heat transfer in turbulent flow was measured in a rectangular channel with a width of 0.254 m and a flow depth of 0.0254 m. Correlations between the Nusselt and Reynolds numbers are given for a range of 3020 Re 22360. A Prandtl number range of 9.90 or = Pr or = 12.28 for water was used in the tests. The results are compared with those of other investigations and show that some well-known correlations underpredict the heat transfer by about 35%.
    Type of Medium: Series available for loan
    Pages: ii, 5 Seiten , Illustrationen
    Series Statement: CRREL Report 79-13
    URL: https://apps.dtic.mil/docs/citations/ADA071003
    URL: https://hdl.handle.net/11681/9011
    Language: English
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  • 6
    Monograph available for loan
    Monograph available for loan
    Climatic modeling of the earth-atmosphere system : final report, december 31, 1975 (1975)
    Tucson : The University of Arizona
    Details Availability
    Call number: MOP 44619 / Mitte
    Type of Medium: Monograph available for loan
    Pages: V, 26 Blatt
    Language: English
    Location: MOP - must be ordered
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  • 7
    Monograph available for loan
    Monograph available for loan
    Solar-terrestrial physics and meteorology : working document - III (1979)
    Washington : Special Committee for Solar-Terrestrial Physics (SCOSTEP), National Academy of Sciences
    Details Availability
    Call number: MOP 43858/3 / Mitte
    Type of Medium: Monograph available for loan
    Pages: 132 Seiten , 28 cm
    Language: English
    Location: MOP - must be ordered
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  • 8
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    Series available for loan
    Arching of model ice floes : effect of mixture variation on two block sizes (1976)
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Details Availability
    Call number: ZSP-201-76/42
    In: CRREL Report, 76-42
    Description / Table of Contents: A study of arching of mixed, square fragmented ice floes at an opening in an ice boom is documented, using results from a model study in which two sizes of plastic blocks represented real ice. A power function, relating the upstream ice concentration to the ratio of a characteristic block dimension to the gap opening, is found adequate to distinguish between arching and nonarching events for block mixtures of two component sizes. It is demonstrated that when the respective total areas of the two block components are nearly equal, a minimum ice concentration initiates an arch across the opening. As the mixture of two sizes of blocks approaches a uniform (one-sized) mixture, a higher concentration of ice is needed to initiate the arch. When the ratio of the block dimension to the gap opening is equal to or less than 0.10, arching of the fragmented ice is not possible, even when the upstream ice discharge exceeds the maximum discharge of ice through a gap opening. The distribution of fragmented ice areas is an important parameter in establishing the minimum size of opening at which an ice boom will retain its arching capability.
    Type of Medium: Series available for loan
    Pages: iv, 17 Seiten , Illustrationen
    Series Statement: CRREL Report 76-42
    URL: https://hdl.handle.net/11681/9487
    Language: English
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  • 9
    Series available for loan
    Series available for loan
    Suppression of river ice by thermal effluents (1979)
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
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    Call number: ZSP-201-79/30
    In: CRREL Report, 79-30
    Description / Table of Contents: The ice suppression resulting from discharge of warm water into rivers during winter is analyzed with emphasis on two different cases. In Part 1 the case of a thermal effluent fully mixed across the flow section is analyzed to include the effects of unsteadiness in the effluent temperature and the meteorological variations. The location of the ice edge is determined either by a 0 C water temperature criterion or an equilibrium ice melting analysis. The choice of the applicable criterion emerges naturally from the analysis even though the location of the ice edge may be considerably different when a steady-state analysis is done. In Part 2 the case of a side discharge of heated effluent is analyzed, also in an unsteady manner, and the effects of transverse dispersion are included in the analysis. Comparisons are made in both Parts 1 and 2 to limited field data that are available.
    Type of Medium: Series available for loan
    Pages: iv, 23 Seiten , Illustrationen
    Series Statement: CRREL Report 79-30
    Language: English
    Note: CONTENTS Abstract Preface Part I. Unsteady suppression of river ice by fully mixed thermal effluents Introduction Governing equations Outline of analysis Location of ice edge Numerical simulation Uncertainties and Imitations Literature cited Part II. Effect of transverse mixing on ice suppression Introduction Analysis of dispersion and heat loss Analysis of ice thickening and melting Numerical simulation Example simulations Field comparison Uncertainties and limitations Literature Cited Appendix A: Computer program for unsteady fully mixed ice suppression Appendix B: Computer program for unsteady lateral mixing ice suppression
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  • 10
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    Point source bubbler systems to suppress ice (1979)
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
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    Call number: ZSP-201-79/12
    In: CRREL Report, 79-12
    Description / Table of Contents: An analysis of a point source bubbler system used to induce local melting of an ice cover is presented. The analysis leads to a numerical simulation programmed in FORTRAN which may be used to predict the effectiveness of such systems. An example application is presented using a typical record of average daily air temperatures. The FORTRAN program for the point source simulation as well as a FORTRAN program for line source systems are included in the Appendix.
    Type of Medium: Series available for loan
    Pages: iii, 12 Seiten , Illustrationen
    Series Statement: CRREL Report 79-12
    URL: https://apps.dtic.mil/docs/citations/ADA071038
    URL: https://hdl.handle.net/11681/9308
    Language: English
    Note: CONTENTS Abstract Preface Introduction Outline of analysis Plume analysis Heat transfer analysis Temperature of impinging plume Heat transfer coefficient Melting of the ice cover Simulation example Thermal reserve analysis Literature cited Appendix
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