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  • 1
    Monograph available for loan
    Monograph available for loan
    Helsinki : Helcom
    Associated volumes
    Call number: ZSP-160-107
    In: Baltic sea environment proceedings
    Type of Medium: Monograph available for loan
    Pages: 57 S.
    Series Statement: Baltic sea environment proceedings 107
    Language: English
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  • 2
    Monograph available for loan
    Monograph available for loan
    New York, NY : Springer-Verlag
    Associated volumes
    Call number: 20/M 07.0074 ; AWI G6-22-820
    In: Environmental Science
    Type of Medium: Monograph available for loan
    Pages: XII, 308 Seiten , Illustrationen , 1 CD-ROM (12 cm)
    ISBN: 0-387-30513-0
    Series Statement: Environmental Science
    Classification:
    Ecology
    Language: English
    Note: Contents Acknowledgments Chapter 1. Introduction 1.1 Discovery 1.2 General Introduction 1.3 Just for Fun — An Isotope Biography of Mr. Polychaete Chapter 2. Isotope Notation and Measurement Overview 2.1 The Necessary Minimum for Ecologists 2.2 Why Use the 5 Notation? 2.3 Why Is 8 a Good Substitute for % Heavy Isotope? 2.4 8 and the Ratio-of-Ratios 2.5 Chapter Summary Chapter 3. Using Stable Isotope Tracers Overview 3.1 Isotope Circulation in the Biosphere 3.2 Landscape Ecology and Isotope Maps 3.3 Community Ecology and Invasive Species in Food Webs 3.4 Life History Ecology and Animal Migrations 3.5 Plants, Microbes, and Scaling Up 3.6 Chapter Summary Chapter 4. Isotope Chi ("I Chi") Overview 4.1 Chocolate Isotopes 4.2 Oxygen in the Sea 4.3 Equations for Isotope Chi ("I Chi") 4.4 Building an I Chi Gain-Loss Model, Step by Step 4.5 Errors in I Chi Models 4.6 Exact Equations for I Chi Models 4.7 Cows in a Pasture 4.8 Chapter Summary Chapter 5. Mixing Overview 5.1 Isotope Mixing in Food Webs 5.2 Isotope Sourcery 5.3 Mixing Mechanics 5.4 Advanced Mixing Mechanics 5.5 Mixing Assumptions and Errors or the Art and Wisdom of Using Isotope Mixing Models 5.6 River Sulfate and Mass-Weighted Mixing 5.7 A Special Muddy Case and Mixing Through Time 5.8 The Qualquan Chronicles and Mixing Across Landscapes 5.9 Dietary Mixing, Turnover, and a Stable Isotope Clock 5.10 Chapter Summary Chapter 6. Isotope Additions Overview 6.1 Addition Addiction 6.2 The Golden Spike Award for Isotopes 6.3 Chapter Summary Chapter 7. Fractionation Overview 7.1 Fractionation Fundamentals 7.2 Isotopium and Fractionation in Closed Systems 7.3 A Strange and Routine Case 7.4 A Genuine Puzzle — Fractionation or Mixing? 7.5 Cracking the Closed Systems 7.6 Equilibrium Fractionation, Subtle Drama in the Cold 7.7 A Supply/Demand Model for Open System Fractionation 7.8 Open System Fractionation and Evolution of the Earth's Sulfur Cycle 7.9 Open System Legacies 7.10 Conducting Fractionation Experiments 7.11 Chapter Summary Chapter 8. Scanning the Future Overview 8.1 The Isotope Scanner 8.2 Mangrove Maude 8.3 The Beginner's Advantage—Imagine! 8.4 Chapter Summary Appendix. Important Isotope Equations and Useful Conversions Index Supplemental Electronic Materials on the Accompanying CD A. Chapter 1 Color Figures and Cartoon Problems B. Chapter 2 Color Figures and Cartoon Problems Technical Supplement 2A: Measuring Spiked Samples Technical Supplement 2B: Ion Corrections Technical Supplement 2C: The Ratio Notation and The Power of 1 C. Chapter 3 Color Figures and Cartoons Problems D. Chapter 4 Color Figures and Cartoons Problems I Chi Spreadsheets E. Chapters 5 Color Figures and Cartoons Problems I Chi Spreadsheets F. Chapter 6 Color Figure and Cartoon Problems I Chi Spreadsheet Technical Supplement 6A: How Much Isotope Should I Add? Technical Supplement 6B: Noisy Data and Data Analysis with Enriched Samples G. Chapter 7 Color Figures and Cartoons Problems I Chi Spreadsheets Technical Supplement 7A: A Chemist's View of Isotope Effects Technical Supplement 7B: Derivations of Closed System Isotope Equations H. Chapter 8 Color Figures and Cartoons Problems I. All Problems for Chapters 1-8 J. All Answers to Problems for Chapters 1-8 K. All Figures and Cartoons L. All I Chi Spreadsheets M. A Reading List
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  • 3
    Call number: AWI S1-07-0025
    Description / Table of Contents: Since the publication of "Spectral Methods in Fluid Dynamics", spectral methods, particularly in their multidomain version, have become firmly established as a mainstream tool for scientific and engineering computation. While retaining the tight integration between the theoretical and practical aspects of spectral methods that was the hallmark of the earlier book, Canuto et al. now incorporate the many improvements in the algorithms and the theory of spectral methods that have been made since 1988. The initial treatment Fundamentals in Single Domains discusses the fundamentals of the approximation of solutions to ordinary and partial differential equations on single domains by expansions in smooth, global basis functions. The first half of the book provides the algorithmic details of orthogonal expansions, transform methods, spectral discretization of differential equations plus their boundary conditions, and solution of the discretized equations by direct and iterative methods. The second half furnishes a comprehensive discussion of the mathematical theory of spectral methods on single domains, including approximation theory, stability and convergence, and illustrative applications of the theory to model boundary-value problems. Both the algorithmic and theoretical discussions cover spectral methods on tensor-product domains, triangles and tetrahedra. All chapters are enhanced with material on the Galerkin with numerical integration version of spectral methods. The discussion of direct and iterative solution methods is greatly expanded as are the set of numerical examples that illustrate the key properties of the various types of spectral approximations and the solution algorithms. A companion book "Evolution to Complex Geometries and Applications to Fluid Dynamics" contains an extensive survey of the essential algorithmic and theoretical aspects of spectral methods for complex geometries and provides detailed discussions of spectral algorithms for fluid dynamics in simple and complex geometries.
    Type of Medium: Monograph available for loan
    Pages: XXII, 563 Seiten , Illustrationen , 235 mm x 155 mm
    ISBN: 3540307257 , 3-540-30725-7 , 978-3-540-30725-9
    ISSN: 1434-8322
    Series Statement: Scientific computation
    Language: English
    Note: Contents 1. Introduction 1.1 Historical Background 1.2 Some Examples of Spectral Methods 1.2.1 A Fourier Galerkin Method for the Wave Equation 1.2.2 A Chebyshev Collocation Method for the Heat Equation 1.2.3 A Legendre Galerkin with Numerical Integration (G-NI) Method for the Advection-Diffusion-Reaction Equation 1.2.4 A Legendre Tau Method for the Poisson Equation 1.2.5 Basic Aspects of Galerkin, Collocation, G-NI and Tau Methods 1.3 Three-Dimensional Applications in Fluids: A Look Ahead 2. Polynomial Approximation 2.1 The Fourier System 2.1.1 The Continuous Fourier Expansion 2.1.2 The Discrete Fourier Expansion 2.1.3 Differentiation 2.1.4 The Gibbs Phenomenon 2.2 Orthogonal Polynomials in (−1, 1) 2.2.1 Sturm-Liouville Problems 2.2.2 Orthogonal Systems of Polynomials 2.2.3 Gauss-Type Quadratures and Discrete Polynomial Transforms 2.3 Legendre Polynomials 2.3.1 Basic Formulas 2.3.2 Differentiation 2.3.3 Orthogonality, Diagonalization and Localization 2.4 Chebyshev Polynomials 2.4.1 Basic Formulas 2.4.2 Differentiation 2.5 Jacobi Polynomials 2.6 Approximation in Unbounded Domains 2.6.1 Laguerre Polynomials and Laguerre Functions 2.6.2 Hermite Polynomials and Hermite Functions 2.7 Mappings for Unbounded Domains 2.7.1 Semi-Infinite Intervals 2.7.2 The Real Line 2.8 Tensor-Product Expansions 2.8.1 Multidimensional Mapping 2.9 Expansions on Triangles and Related Domains 2.9.1 Collapsed Coordinates and Warped Tensor-Product Expansions 2.9.2 Non-Tensor-Product Expansions 2.9.3 Mappings 3. Basic Approaches to Constructing Spectral Methods 3.1 Burgers Equation 3.2 Strong and Weak Formulations of Differential Equations 3.3 Spectral Approximation of the Burgers Equation 3.3.1 Fourier Galerkin 3.3.2 Fourier Collocation 3.3.3 Chebyshev Tau 3.3.4 Chebyshev Collocation 3.3.5 Legendre G-NI 3.4 Convolution Sums 3.4.1 Transform Methods and Pseudospectral Methods 3.4.2 Aliasing Removal by Padding or Truncation 3.4.3 Aliasing Removal by Phase Shifts 3.4.4 Aliasing Removal for Orthogonal Polynomials 3.5 Relation Between Collocation, G-NI and Pseudospectral Methods 3.6 Conservation Forms 3.7 Scalar Hyperbolic Problems 3.7.1 Enforcement of Boundary Conditions 3.7.2 Numerical Examples 3.8 Matrix Construction for Galerkin and G-NI Methods 3.8.1 Matrix Elements 3.8.2 An Example of Algebraic Equivalence between G-NI and Collocation Methods 3.9 Polar Coordinates 3.10 Aliasing Effects 4. Algebraic Systems and Solution Techniques 4.1 Ad-hoc Direct Methods 4.1.1 Fourier Approximations 4.1.2 Chebyshev Tau Approximations 4.1.3 Galerkin Approximations 4.1.4 Schur Decomposition and Matrix Diagonalization 4.2 Direct Methods 4.2.1 Tensor Products of Matrices 4.2.2 Multidimensional Stiffness and Mass Matrices 4.2.3 Gaussian Elimination Techniques 4.3 Eigen-Analysis of Spectral Derivative Matrices 4.3.1 Second-Derivative Matrices 4.3.2 First-Derivative Matrices 4.3.3 Advection-Diffusion Matrices 4.4 Preconditioning 4.4.1 Fundamentals of Iterative Methods for Spectral Discretizations 4.4.2 Low-Order Preconditioning of Model Spectral Operators in One Dimension 4.4.3 Low-Order Preconditioning in Several Dimensions 4.4.4 Spectral Preconditioning 4.5 Descent and Krylov Iterative Methods for Spectral Equations 4.5.1 Multidimensional Matrix-Vector Multiplication 4.5.2 Iterative Methods 4.6 Spectral Multigrid Methods 4.6.1 One-Dimensional Fourier Multigrid Model Problem 4.6.2 General Spectral Multigrid Methods 4.7 Numerical Examples of Direct and Iterative Methods 4.7.1 Fourier Collocation Discretizations 4.7.2 Chebyshev Collocation Discretizations 4.7.3 Legendre G-NI Discretizations 4.7.4 Preconditioners for Legendre G-NI Matrices 4.8 Interlude 5. Polynomial Approximation Theory 5.1 Fourier Approximation 5.1.1 Inverse Inequalities for Trigonometric Polynomials 5.1.2 Estimates for the Truncation and Best Approximation Errors 5.1.3 Estimates for the Interpolation Error 5.2 Sturm-Liouville Expansions 5.2.1 Regular Sturm-Liouville Problems 5.2.2 Singular Sturm-Liouville Problems 5.3 Discrete Norms 5.4 Legendre Approximations 5.4.1 Inverse Inequalities for Algebraic Polynomials 5.4.2 Estimates for the Truncation and Best Approximation Errors 5.4.3 Estimates for the Interpolation Error 5.4.4 Scaled Estimates 5.5 Chebyshev Approximations 5.5.1 Inverse Inequalities for Polynomials 5.5.2 Estimates for the Truncation and Best Approximation Errors 5.5.3 Estimates for the Interpolation Error 5.6 Proofs of Some Approximation Results 5.7 Other Polynomial Approximations 5.7.1 Jacobi Polynomials 5.7.2 Laguerre and Hermite Polynomials 5.8 Approximation in Cartesian-Product Domains 5.8.1 Fourier Approximations 5.8.2 Legendre Approximations 5.8.3 Mapped Operators and Scaled Estimates 5.8.4 Chebyshev and Other Jacobi Approximations 5.8.5 Blended Trigonometric and Algebraic Approximations 5.9 Approximation in Triangles and Related Domains 6. Theory of Stability and Convergence 6.1 Three Elementary Examples Revisited 6.1.1 A Fourier Galerkin Method for the Wave Equation 6.1.2 A Chebyshev Collocation Method for the Heat Equation 6.1.3 A Legendre Tau Method for the Poisson Equation 6.2 Towards a General Theory 6.3 General Formulation of Spectral Approximations to Linear Steady Problems 6.4 Galerkin, Collocation, G-NI and Tau Methods 6.4.1 Galerkin Methods 6.4.2 Collocation Methods 6.4.3 G-NI Methods 6.4.4 Tau Methods 6.5 General Formulation of Spectral Approximations to Linear Evolution Problems 6.5.1 Conditions for Stability and Convergence: The Parabolic Case 6.5.2 Conditions for Stability and Convergence: The Hyperbolic Case 6.6 The Error Equation 7. Analysis of Model Boundary-Value Problems 7.1 The Poisson Equation 7.1.1 Legendre Methods 7.1.2 Chebyshev Methods 7.1.3 Other Boundary-Value Problems 7.2 Singularly Perturbed Elliptic Equations 7.2.1 Stabilization of Spectral Methods 7.3 The Eigenvalues of Some Spectral Operators 7.3.1 The Discrete Eigenvalues for Lu = −uxx 7.3.2 The Discrete Eigenvalues for Lu = −νuxx + βux 7.3.3 The Discrete Eigenvalues for Lu = ux 7.4 The Preconditioning of Spectral Operators 7.5 The Heat Equation 7.6 Linear Hyperbolic Equations 7.6.1 Periodic Boundary Conditions 7.6.2 Nonperiodic Boundary Conditions 7.6.3 The Resolution of the Gibbs Phenomenon 7.6.4 Spectral Accuracy for Non-Smooth Solutions 7.7 Scalar Conservation Laws 7.8 The Steady Burgers Equation Appendix A. Basic Mathematical Concepts A.1 Hilbert and Banach Spaces A.2 The Cauchy-Schwarz Inequality A.3 Linear Operators Between Banach Spaces A.4 The Fr´echet Derivative of an Operator A.5 The Lax-Milgram Theorem A.6 Dense Subspace of a Normed Space A.7 The Spaces Cm(Ω), m ≥ 0 A.8 Functions of Bounded Variation and the Riemann(-Stieltjes) Integral A.9 The Lebesgue Integral and Lp-Spaces A.10 Infinitely Differentiable Functions and Distributions A.11 Sobolev Spaces and Sobolev Norms A.12 The Sobolev Inequality A.13 The Poincar´e Inequality A.14 The Hardy Inequality A.15 The Gronwall Lemma Appendix B. Fast Fourier Transforms Appendix C. Iterative Methods for Linear Systems C.1 A Gentle Approach to Iterative Methods C.2 Descent Methods for Symmetric Problems C.3 Krylov Methods for Nonsymmetric Problems Appendix D. Time Discretizations D.1 Notation and Stability Definitions D.2 Standard ODE Methods D.2.1 Leap Frog Method D.2.2 Adams-Bashforth Methods D.2.3 Adams-Moulton Methods D.2.4 Backwards-Difference Formulas D.2.5 Runge-Kutta Methods D.3 Integrating Factors D.4 Low-Storage Schemes References Index
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  • 4
    Series available for loan
    Series available for loan
    Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung
    Associated volumes
    Call number: ZSP-168-547 ; ZS-090(547)
    In: Berichte zur Polar- und Meeresforschung
    Type of Medium: Series available for loan
    Pages: 152 S. : graph. Darst.
    ISSN: 1618-3193
    Series Statement: Berichte zur Polar- und Meeresforschung 547
    Classification:
    Meteorology and Climatology
    Language: English
    Note: Zugl.: Bremen, Univ., Diss., 2005
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  • 5
    Call number: ZSP-168-549 ; ZS-090(549)
    In: Berichte zur Polar- und Meeresforschung
    Type of Medium: Series available for loan
    Pages: 214 S. : graph. Darst.
    ISSN: 1618-3193
    Series Statement: Berichte zur Polar- und Meeresforschung 549
    Classification:
    Oceanology
    Language: English
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  • 6
    Call number: ZSP-403-291
    In: Jare Data Reports
    Type of Medium: Series available for loan
    Pages: 8 S. : Ill., überw. graph. Darst.
    Series Statement: Jare Data Reports 291 : Marine Biology 35
    Language: English
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  • 7
    Call number: ZSP-403-288
    In: Jare Data Reports
    Type of Medium: Series available for loan
    Pages: 59 S. : überw. graph. Darst.
    Series Statement: Jare Data Reports 288 : Upper Atmosphere Physics 23
    Language: English
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  • 8
    Call number: ZSP-403-286
    In: Jare Data Reports
    Type of Medium: Series available for loan
    Pages: 15 S. : überw. graph. Darst.
    Series Statement: Jare Data Reports 286 : Marine Biology 33
    Language: English
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  • 9
    Call number: ZSP-403-283
    In: Jare Data Reports
    Type of Medium: Series available for loan
    Pages: 34 S. : überw. graph. Darst. u. Ill.
    Series Statement: Jare Data Reports 283 : Earth Science 6
    Language: English
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  • 10
    Call number: ZSP-403-293
    In: Jare Data Reports
    Type of Medium: Series available for loan
    Pages: 59 S. : überw. graph. Darst.
    Series Statement: JARE data reports 293 : Oceanography 28
    Language: English
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  • 11
    Call number: ZSP-403-294
    In: Jare Data Reports
    Type of Medium: Series available for loan
    Pages: 55 S. : überw. graph. Darst.
    Series Statement: JARE data reports 294 : Oceanography 29
    Language: English
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  • 12
    Call number: ZSP-403-295
    In: Jare Data Reports
    Type of Medium: Series available for loan
    Pages: 55 S. : überw. graph. Darst.
    Series Statement: JARE data reports 295 : Oceanography 30
    Language: English
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  • 13
    Call number: ZSP-403-297
    In: Jare Data Reports
    Type of Medium: Series available for loan
    Pages: 38 S. : überw. graph. Darst.
    Series Statement: Jare Data Reports 297 : Glaciology 31
    Language: English
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  • 14
    Call number: ZSP-405a-07-0076
    In: JAXA Research and Development Report
    Type of Medium: Monograph available for loan
    Pages: 9 S.
    Series Statement: JAXA Research and development report RR-06-012E
    Language: English
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  • 15
    Call number: ZSP-405a-07-0077
    In: JAXA Research and Development Report
    Type of Medium: Monograph available for loan
    Pages: 7 S.
    Series Statement: JAXA Research and development report RR-06-014E
    Language: English
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  • 16
    Call number: ZSP-403-299
    In: Jare Data Reports
    Type of Medium: Series available for loan
    Pages: 101 S. : überw. graph. Darst.
    Series Statement: Jare Data Reports 299 : Seismology 41
    Language: English
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  • 17
    Call number: ZSP-405a-08-0005
    In: JAXA Research and Development Report
    Type of Medium: Series available for loan
    Pages: 10 S.
    Series Statement: JAXA Research and development report RR-06-018E
    Language: English
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  • 18
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-79/3
    In: CRREL Report, 79-3
    Type of Medium: Series available for loan
    Pages: ii, 7 Seiten , Illustrationen
    Series Statement: CRREL Report 79-3
    Language: English
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  • 19
    Call number: ZSP-201-79/7
    In: CRREL Report, 79-7
    Description / Table of Contents: Sediments beneath the Beaufort Sea near Prudhoe Bay, Alaska, were probed at 27 sites using a static cone penetrometer to determine engineering properties and distribution of material types, including ice-bonded sediments. The probe provided both point and casing resistance data and thermal profiles. At five sites these data were correlated with information from adjacent drilled and sampled holes. These control data and the quality of the probe information permitted profiles of sediment type and occurrence of ice-bonded material to be developed along three lines that included various geological features and depositional environments. Material properties were quite variable in the upper 14 m of sediments probed. In general, softer, finer-grained sediments occurred in the upper layers, while penetration refusal was met in stiff gravels to 10 to 12 m below the seabed. Seabed temperatures during the study were all below 0 C. However, because of uncertainties in freezing point values caused by brines, evaluation of the penetration resistance data was required to identify the occurrence of ice-bonded sediments. The coupling of thermal and penetration resistance data revealed that seasonally ice-bonded sediments occurred where the sea ice froze back to or near the seabed. Deeper, perennially frozen sediments also appeared to be present at several probe sites. The penetration data obtained can be used to aid in the design of shallow and deep foundations in both ice-bonded and unfrozen subsea sediments.
    Type of Medium: Series available for loan
    Pages: iv, 49 Seiten , Illustrationen
    Series Statement: CRREL Report 79-7
    Language: English
    Note: CONTENTS Abstract Preface Introduction Equipment Data collection and reduction Data analysis and interpretation Point penetration resistance and material properties Lithologic and temperature profiles Casing penetration resistance Applications Shallow foundations Deep foundations Foundations in permafrost Correlations with laboratory tests Conclusions Selected bibliography Appendix A: Description of penetrometer and test procedures Appendix B: Point resistance and skin friction data
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  • 20
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    In: CRREL Report, 79-5
    Description / Table of Contents: Abstract: This report presents data from an experimental program undertaken to develop information on proposed and existing chemical grout solutions to provide engineering properties in connection with grouting of soils in ambient temperatures of 39° ±1°F (3.88°C) and below. Twelve grout solutions were investigated, including organic chemicals, sodium silicates, cements, and clay (bentonite). Set or gel tests were performed on each chemical solution, in the center of which a thermocouple was placed for measuring the rates of heat of reaction, except those of the cements and the clay. These solutions consisted of the mixing portions of the chemicals and were placed into 4-in.-diam by approximately 6-in.-long cylinders at an ambient temperature of 39°F.
    Type of Medium: Series available for loan
    Pages: v, 38 Seiten , Illustrationen
    Series Statement: CRREL Report 79-5
    Language: English
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  • 21
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-79/4
    In: CRREL Report, 79-4
    Description / Table of Contents: A computer model is described to compute the amount of ice accretion on an object under a variety of initial conditions. Numerical techniques are best applied to these problems because of time dependent effects governing the amount of ice collected and also the variety of initial conditions that can lead to ice accumulation. The helicopter rotor icing problem adds an additional complexity since the velocity along the rotor blade varies over a wide range strongly affecting the amounts of ice collected at different blade positions. The physics of ice accretion is reviewed and the accounting for time-dependence in the computer model is described. Some model results are presented and indicate the dependence of ice accretion on velocity, droplet sizes, cloud liquid water content, and temperature for a cylindrical object of constant size.
    Type of Medium: Series available for loan
    Pages: iii, 39 Seiten , Illustrationen
    Series Statement: CRREL Report 79-4
    Language: English
    Note: CONTENT Abstract Preface Introduction Ice accretion parameters Physics of ice accretion Interaction between water droplets and flow field Time dependence in droplet trajectories Thermodynamic processes at the surface of the object Time dependence in the thermodynamics Time dependence of lesser order Numerical ice accretion model Major subroutines Options for droplet size variations Option for the helicopter rotor case Results Conclusions and future studies Literature cited Appendix A: Computer program
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  • 22
    Call number: ZSP-201-78/9
    In: CRREL Report, 78-9
    Description / Table of Contents: Large, simply supported beams of temperate lake ice were found, generally, to yield significantly higher flexural strengths than the same beams tested in the cantilever mode. Data support the view that a significant stress concentration may exist at the fixed corners of the cantilever beams. Maximum effects are experienced with beams of cold, brittle ice substantially free of structural imperfections; for this kind of ice the strength difference factor, here attributed to the effect of stress concentrations, may exceed 2.0; that is, simply supported beams test a factor of 2 or more stronger than the same beams tested in the cantilever mode. In ice that has undergone extensive thermal degradation, the stress concentration effect may be eliminated entirely. Simply supported beams generally yield higher strengths when the top surfaces are placed in tension. This behavior is attributed to differences in ice type; the fine-grained, crack-free top layer of snow-ice which constituted up to 50% of the ice cover in the current series of tests usually reacted more strongly in tension than the coarse-grained crack-prone bottom lake ice.
    Type of Medium: Series available for loan
    Pages: iv, 14 Seiten , Illustrationen
    Series Statement: CRREL Report 78-9
    Language: English
    Note: CONTENTS Abstract Preface Introduction Test sites and ice cover properties Beam testing Results Discussion Conclusions Literature cited
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  • 23
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-78/6
    In: CRREL Report, 78-6
    Description / Table of Contents: A new freezing mechanism, called segregation freezing, is proposed to explain the generation of the suction force that draws pore water up to the freezing surface of a growing ice lens. The segregation freezing temperature is derived by applying thermodynamics to a soil mechanics concept that distinguishes the effective pressure from the neutral pressure. The frost-heaving pressure is formulated in the solution of the differential equations of the simultaneous flow of heat and water, of which the segregation freezing temperature is one of the boundary conditions.
    Type of Medium: Series available for loan
    Pages: iv, 13 Seiten , Illustrationen
    Series Statement: CRREL Report 78-6
    Language: English
    Note: CONTENTS Abstract Preface Nomenclature Introduction Segregation freezing Analysis Heat conduction in the nascent ice layer Water flow in the unfrozen soil Heat transfer in the unfrozen soil Energy balance at the segregation-freezing front Numerical computation Literature cited Appendix A. Essence of Portnov’s method Appendix B. Frost-heaving without air available
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  • 24
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-77/31
    In: CRREL Report, 77-31
    Description / Table of Contents: Ten roofs in Concord, New Hampshire, were surveyed for wet insulation using a hand-held infrared camera. Suspected wet areas were marked on the roof with spray paint and roof samples were obtained to verify wet and dry conditions. Recommendations for maintenance and repair were made based on infrared findings, water contents, and visual examinations. An incremental economic study is presented to serve as a guide in determining the most cost-effective approach.
    Type of Medium: Series available for loan
    Pages: v, 29 Seiten , Illustrationen
    Series Statement: CRREL Report 77-31
    Language: English
    Note: CONTENTS Abstract Preface Conversion factors: US, customary to metric (SI) units of measurement Introduction Infrared camera Core samples State House State House Annex State Library Legislative Office Building Public Health Complex Highway Garage Fish and Game Offlces Supreme Court John O. Morton Building Department of Health and Welfare Laboratory Economics of roof reinsulation Conclusions and recommendations Literature cited
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  • 25
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    Call number: ZSP-201-78/20
    In: CRREL Report, 78-20
    Description / Table of Contents: Abstract: Measurements of the concentrations of Aitken nuclei in maritime air were made near Barrow, Alaska, in June 1975 with a modified Nolan-Pollack small-particle detector. The concentrations varied from 50 to 300 particles cm^-3 depending upon meteorological conditions. The mean Aitken nuclei count was 100 particles cm^-3 for diameters greater than 2 x 10^-3 μm. Transmission electron micrographs of aerosols in maritime air near Barrow were taken. The size range was measured to be 0.01 to 2.5 μm in diameter with the most frequently observed diameter being 0.04 μm. The volume of the maritime air and the collection efficiency of aerosol particles on filmed grids for electron microscopy were measured. The aerosol concentrations were found to be 76 to 101 particles cm^-3 ; the mean concentration was calculated to be 87 particles cm^-3. The aerosol particles in the maritime air were identified by electron microscopy and selected area electron diffraction analysis. About 20% of the aerosol particles were identified, and 80% of the particles were too small for electron diffraction analysis. Sea salt particles constituted 2% of the total, and clay minerals 3%; these particles were considered to be of natural origin. Solid combustion by-products such as coagulated carbon particles and fly ash particles constituted 16%. Despite the comparative remoteness of the sampling site, the measurements indicate that many anthropogenic aerosols were found using an electron microscope.
    Type of Medium: Series available for loan
    Pages: iv, 48 Seiten , Illustrationen
    Series Statement: CRREL Report 78-20
    Language: English
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  • 26
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    Call number: ZSP-201-78/18
    In: CRREL Report, 78-18
    Description / Table of Contents: The primary objective of this project was to demonstrate the utility of remote sensing techniques as an operational tool in the acquisition of data required by the U.S. Army Corps of Engineers, Seattle District, in the Grays Harbor dredging effects project, and related projects. Aerial imagery was used to map surface circulation and suspended sediment patterns near the hopper dredge pump site at the harbor entrance and near pulpmill outfalls in Aberdeen, and to map the areal distribution and extent of intertidal habitats. The surface circulation maps prepared from the aerial photographs and thermal imagery compared favorably with the large-scale circulation patterns observed in the Grays Harbor hydraulic model at the U.S. Army Engineer Waterways Experiment Station. Of the imagery provided by NASA, the thermal imagery was more useful than the color or color infrared (CIR) photographs for mapping circula­tion, while the CIR photographs were more useful than the thermal imagery or the color photographs for mapping intertidal habitats. Current velocities estimated from dye dispersion patterns and drifting dye drogues were comparable at some locations to velocities measured by in situ current meters and in the hydraulic model. Based on a cursory evaluation of LANDSAT-1 imagery acquired in January, February, and October 1973, it had limited utility in providing data on surface circulation patterns in Grays Harbor. The areal distribution and extent of nine wetland vegetation types, dune vegetation, and three types of eelgrass were mapped using primarily aerial C IR photographs and ground sur­veys. Color photographs were also used for areas not covered by the C IR photographs. Wetland vegetation types mapped were: low silty marsh, low sandy marsh, sedge marsh, high immature marsh, high mature marsh, salt marsh, diked pasture, freshwater marsh, and wooded swamp. Undiked salt marsh (first five types) covered 5540 acres (22.3 km2) in Grays Harbor.
    Type of Medium: Series available for loan
    Pages: vi, 85 Seiten , Illustrationen
    Series Statement: CRREL Report 78-18
    Language: English
    Note: CONTENTS Abstract Preface Introduction Site description Background and objectives Project history Approach General Aircraft imagery and sensor data LANDSAT imagery Ground truth data Results and discussion Remote sensing techniques Conventional techniques Comparison of results Conclusions Advantages and disadvantages Applications Recommendations Literature cited
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  • 27
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-77/21
    In: CRREL Report, 77-21
    Description / Table of Contents: Cold weather limits the successful application of built-up roofing, but often a roof installation must be completed late in the fall or in the winter. The loose-laid protected membrane roof with a synthetic sheet membrane can be installed in the middle of the winter with complete reliability. A synthetic membrane is traditionally more expensive than built-up roofing (rising crude oil prices, however, have reversed this condition), but it has two special features besides its suitability for winter installation: it can be placed on a damp deck, if necessary, and, being losse-laid, it does not split because of deck movement. This report documents information on the installation of two roofs in Anchorage, Alaska, during January and February 1972, including a discussion of the necessary snow removal from the bare deck and the use of portable shelters for preparing the lap joints between sheets during very cold weather. The winter installation caused no special construction problems and the advantages of the synthetic membrane make it an attractive alternative to built-up roofing. The cost of loose-laid protected membrane roofs in Alaska was, in 1972, nearly $300 per square ($28/sq.m), including insulation. Prices are rising as labor costs rise and as more insulation is specified.
    Type of Medium: Series available for loan
    Pages: 5 Seiten , Illustrationen
    Series Statement: CRREL Report 77-21
    Language: English
    Note: CONTENTS Abstract Preface Introduction The protected membrane roof Winter construction considerations Construction costs Conclusion
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  • 28
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-201-77/19
    In: CRREL Report, 77-19
    In: Mechanics of cutting and boring, Part VI
    Description / Table of Contents: Abstract: The report deals with forces and power levels in cutting machines having adisc or drum that rotates about an axis perpendicular to the direction of advance. The forces on individual cutting tools are related to position on the rotor and to characteristics such as tool layout, rotor speed, rotor size, machine advance speed, and rotor torque. Integration leads to expressions for force components acting on the rotor axis, taking into account tool characteristics, cutting depth of the rotor, and rotor torque. These provide estimates of tractive thrust and thrust normal to the primary free surface. For self-propelled machines, this leads to considerations of traction, normal reaction, weight and balance, and power/weight ratios. Specific energy consumption is analyzed and related to machine characteristics and strength ofthe material being cut. Power per unit working area is discussed, and data for existing machines are summarized. Power requirements for ejection ofcuttings are analyzed, and the hydrodynamic resistance on underwater cuttings is treated. A number of worked examples are given to illustrate the principles discussed in the report.
    Type of Medium: Series available for loan
    Pages: vii, 36 Seiten , Illustrationen
    Series Statement: CRREL Report 77-19
    Language: English
    Note: CONTENTS Abstract Preface Foreword Introduction Terminology Forces on individual cutters Torque force and tool force Forces on the rotor axis Tractive thrust and down thrust Alternative tool force formulations Vehicle traction Power/weight ratio Weight and balance Force, torque, speed and power Specific energy Efficiency and performance index Power density Power requirements for ejection of cuttings Hydrodynamic resistance in underwater cutting
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  • 29
    Call number: ZSP-403-303
    In: Jare Data Reports
    Type of Medium: Series available for loan
    Pages: 59 S. : überw. graph. Darst.
    Series Statement: Jare Data Reports 303 : Upper Atmosphere Physics 26
    Language: English
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  • 30
    Call number: PIK M 102-08-0153 ; PIK M 102-08-0257 ; 19/M 10.0047 ; AWI S1-10-0005
    Type of Medium: Monograph available for loan
    Pages: XII, 288 Seiten , Illustrationen, Diagramme, Karten , 1 CD-ROM (12 cm)
    Edition: Second edition
    ISBN: 3540727485 , 978-3-540-72748-4
    Language: English
    Note: Contents Preface 1 Data Analysis in Earth Sciences 1.1 Introduction 1.2 Collecting Data 1.3 Types of Data 1.4 Methods of Data Analysis Recommended Reading 2 Introduction to MATLAB 2.1 MATLAB in Earth Sciences 2.2 Getting Started 2.3 The Syntax 2.4 Data Storage 2.5 Data Handling 2.6 Scripts and Functions 2.7 Basic Visualization Tools Recommended Reading 3 Univariate Statistics 3.1 Introduction 3.2 Empirical Distributions Measures of Central Tendency Measures of Dispersion 3.3 Example of Empirical Distributions 3.4 Theoretical Distributions Uniform Distribution Binomial or Bernoulli Distribution Poisson Distribution Normal or Gaussian Distribution Logarithmic Normal or Log-Normal Distribution Student's t Distribution Fisher's F Distribution Χ2 or Chi-Squared Distribution 3.5 Example ofTheoretical Distributions 3.6 Thet-Test 3.7 TheF-Test 3.8 The Χ2-Test Recommended Reading 4 Bivariate Statistics 4.1 Introduction 4.2 Pearson's Correlation Coefficient 4.3 Classical Linear Regression Analysis and Prediction 4.4 Analyzing the Residuals 4.5 Bootstrap Estimates of the Regression Coefficients 4.6 Jackknife Estimates of the Regression Coefficients 4.7 Cross Validation 4.8 Reduced Major Axis Regression 4.9 Curvilinear Regression Recommended Reading 5 Time-Series Analysis 5.1 Introduction 5.2 Generating Signals 5.3 Blackman-Tukey Autospectral Analysis 5.4 Blackman-Tukey Crossspectral Analysis 5.5 Interpolating and Analyzing Unevenly-Spaced Data 5.6 Evolutionary Blackman-Tukey Powerspectrum 5.7 Lomb-Scargle Powerspectrum 5.8 Wavelet Powerspectrum 5.9 Nonlinear Time-Series Analysis (by N. Marwarn) Phase Space Portrait Recurrence Plots Recommended Reading 6 Signal Processing 6.1 Introduction 6.2 Generating Signals 6.3 Linear Time-Invariant Systems 6.4 Convolution and Filtering 6.5 Comparing Functions for Filtering Data Series 6.6 Recursive and Nonrecursive Filters 6.7 Impulse Response 6.8 Frequency Response 6.9 Filter Design 6.10 Adaptive Filtering Recommended Reading 7 Spatial Data 7.1 Types of Spatial Data 7.2 The GSHHS Shoreline Data Set 7.3 The 2-Minute Gridded Global Elevation Data ETOPO2 7.4 The 30-Arc Seconds Elevation Model GTOPO30 7.5 The Shuttle Radar Topography Mission SRTM 7.6 Gridding and Contouring Background 7.7 Gridding Example 7.8 Comparison of Methods and Potential Artifacts 7.9 Statistics of Point Distributions Test for Uniform Distribution Test for Random Distribution Test for Clustering 7.10 Analysis of Digital Elevation Models (by R. Gebbers) 7.11 Geostatistics and Kriging (by R. Gebbers) Theorical Background Preceding Analysis Variography with the Classical Variogram Kriging Discussion of Kriging Recommended Reading 8 Image Processing 8.1 Introduction 8.2 Datastorage 8.3 Importing, Processing and Exporting Images 8.4 Importing, Processing and Exporting Satellite Images 8.5 Georeferencing Satellite Images 8.6 Digitizing from the Screen Recommended Reading 9 Multivariate Statistics 9.1 Introduction 9.2 Principal Component Analysis 9.3 Independent Component Analysis (by N. Marwan) 9.4 Cluster Analysis Recommended Reading 10 Statistics on Directional Data 10.1 Introduction 10.2 Graphical Representation 10.3 Empirical Distributions 10.4 Theoretical Distributions 10.5 Test for Randomness of Directional Data 10.6 Test for the Significance of a Mean Direction 10.7 Test for the Difference of Two Sets of Directions Recommended Reading General Index
    Location: A 18 - must be ordered
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    Call number: ZSP-403-304
    In: Jare Data Reports
    Type of Medium: Series available for loan
    Pages: 52 S. : überw. graph. Darst.
    Series Statement: Jare Data Reports 304 : Oceanography 31
    Language: English
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  • 32
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-76/2
    In: CRREL Report, 76-2
    Description / Table of Contents: The repair and maintenance costs of low slope roofs are high and their life expectancy is less than desired. The increasing use of insulation is accompanied by a greater incidence of problems. The experience in cold regions amplifies these experiences. Protected membrane roofs have the prerequisites for better performance and the experience to date is encouraging. The results of performance measurements of three roofs built by the Corps of Engineers verify that the membrane remains at nearly constant temperature, independent of the weather, and that the insulation retains its integrity despite periodic wetting. Moisture absorption is slow and appears to stabilize in time due to the self-drying nature of the roof. Heat losses are increased due to rain, and extra insulation should be added to compensate for these losses. The resistance of protected membrane roofs to fire, traffic, impact, and other adverse forces is superior. So far, the initial cost of protected membrane roofs is at a premium, primarily due to the cost of concrete pavers. The initial cost premium can be justified, however, by the reduced repair and maintenance costs as indicated to date, and by the longer life expectancy of the protected membrane. The high probability of superior performance and cost effectiveness is a compelling reason to incorporate protected membrane roofs increasingly in Government construction.
    Type of Medium: Series available for loan
    Pages: v, 27 Seiten , Illustrationen
    Series Statement: CRREL Report 76-2
    Language: English
    Note: CONTENTS Page Abstract Preface Introduction Low slope roof problems and repair costs Protected membrane roofs and materials Installations of protected membrane roofs Performance evaluation Test program Effectiveness Thermal efficiency Heat balance Internal cooling due to rain Moisture absorption and thermal conductivity of insulations Durability and life expectancy Fire resistance Patent considerations Costs of roofs Design considerations Proposed specifications Conclusions and recommendations Literature cited
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  • 33
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-201-76/4
    In: CRREL Report, 76-4
    Description / Table of Contents: Large areas of grounded sea ice have been reported by early arctic explorers and more recently by the U.S. Coast Guard. The ESSA, ERTS, NOAA and DMSP satellites now provide multispectral imagery with sufficiently high resolution to allow detailed sequential observations to be made of the movement and spatial extent of arctic sea ice. This report discusses the location, formation and decay of five large (greater than 30 sq km) islands of grounded sea ice in the southern Chukchi Sea as observed for an extended period of time using satellite imagery. Measurements of the bathymetry around one grounded sea ice feature are presented along with observations made and photos taken from the ice surface. The potential use of these sea ice islands as research stations is also discussed.
    Type of Medium: Series available for loan
    Pages: v, 24 Seiten , Illustrationen
    Series Statement: CRREL Report 76-4
    Language: English
    Note: Contents Introduction The discovery Age of the island Island visit Other islands of grounded ice Discussion Literature cited
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  • 34
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-201-76/1
    In: CRREL Report, 76-1
    Description / Table of Contents: This report summarizes the advances in understanding of the Arctic which have come about since the inception of the ARPA Arctic Surface Effect Vehicle Program in 1970, primarily as the result of CRREL’s participation. Major efforts to increase knowledge of sea ice, terrestrial, and coastal topographic features are described. Special empha­sis is placed upon the quantitative understanding of pressure ridging. Other areas of major interest are atmospheric characteristics and ecological effects. A list of publications generated is included.
    Type of Medium: Series available for loan
    Pages: iv, 28 Seiten , Illustrationen
    Series Statement: CRREL Report 76-1
    Language: English
    Note: CONTENTS Abstract Preface Introduction Sea ice characteristics Ridging intensity Arctic terrain characteristics databank Digital terrain maps Digital laser profiles Standard terrain tapes Mobility analysis Terrestrial and coastal characteristics Northern Alaska Interior Alaska Arctic USSR Northern Canada and Greenland Climatological characteristics General features Surface winds Temperatures Precipitation and visibility Electromagnetic/optical propagation Ecological effects of SEV operations SK-5 tests Simulated SEV tests Conclusions Literature cited Additional CRREL SEV Bibliography
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  • 35
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-76/5
    In: CRREL Report, 76-5
    Description / Table of Contents: Griffith, and later Babel, have previously developed a tensile fracture criterion for a two-dimensional state of stress. This theory is extended to the compression-compression region. From this theory the angle of fracture is developed. The theory is extended conceptually to three dimensions. Triaxial test data by Haynes for snow-ice are shown in this three-dimensional fracture theory. The test data are slightly less than those predicted when the void in the snow-ice is spherical.
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    Pages: iii, 9 Seiten , Illustrationen
    Series Statement: CRREL Report 76-5
    Language: English
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  • 36
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-201-76/7
    In: CRREL Report, 76-7
    Description / Table of Contents: This report covers a series of cantilever beam tests designed to determined the efficacy of adding reinforcement to an ice cover. Tests were run using 1-in.-diam tree branches, 3/16-in.-diam wire rope and 9/16-in. half-round wood dowels as reinforcement for both seawater and freshwater ice. The results show a definite advantage derived from using reinforcement, even when poorly placed. The results also show that reinforced ice carries a load even after it cracks. Thus, after the initial cracks there is time to remove people and equipment before final breakthrough. One must bear in mind, however, that reinforcement has disadvantages. The darker reinforcement absorbs solar radiation and thereby causes earlier weakening of the ice cover. Also, in many cases the time and effort required to place reinforcement may exceed those required to achieve equal strength by additional thickening of the ice sheet. This study has shown that understanding of the failure mechanism of ice under repetitive loading is poor and that future studies should be performed on this problem. Also, this study covered only cantilever beams. The actual field problem is strengthening a three-dimensional sheet. Hence, distribution and orientation of the reinforcement should be addressed in future studies.
    Type of Medium: Series available for loan
    Pages: v, 12 Seiten , Illustrationen
    Series Statement: CRREL Report 76-7
    Language: English
    Note: Contents Abstract Preface Summary Conversion factors: U.S. customary to SI metric units Introduction Typical methods of constructing ice bridges Current knowledge Test program Objectives Equipment Procedure Data General Specific ice sheets Test results Conclusions Recommendations Literature cited
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  • 37
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-201-76/9
    In: CRREL Report, 76-9
    Description / Table of Contents: Access to study areas may be an important factor in long-term field-oriented research, particularly in-regions without well-developed road and communications systems. In a wildland hydrometeorology research project in subarctic Alaska, access to and within a 40-square-mile research watershed has been developed both in accordance with a general plan prepared at project inception and in response to developing research requirements. Foot trails, trails for 'off-road' low-ground-pressure tracked vehicles, helicopter transport, long-term data recorders, and radio telemetry of data have all been incorporated in an access and communications system. Cost estimates indicate that incorporation of gravel roads into the system would be economically advantageous, given adequate funding for initial road construction.
    Type of Medium: Series available for loan
    Pages: iv, 9 Seiten , Illustrationen
    Series Statement: CRREL Report 76-9
    Language: English
    Note: Contents Abstract Preface Conversion factors for U.S. customary and SI units Introduction Access within the Caribou-Poker Creeks Research Watershed Trail access Helicopter access Road access Alternative approaches Long-term recorders Telemetry systems Remote sensing Relative costs A desirable system Selected bibliography
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  • 38
    Call number: AWI G5-10-0074 ; M 11.0047
    In: Developments in paleoenvironmental research
    Description / Table of Contents: Chapter 1: High-resolution Paleoclimatology - R. Bradley What is high-resolution paleoclimatology? What are its major achievements? What opportunities and challenges does it now face? What should dendroclimatology's role be in this? Chapter 2: Dendroclimatology in high-resolution Paleoclimatology - M. K. Hughes, H. F. Diaz and Th. W. Swetnam An overview of the development of dendroclimatology and an introduction to the questions posed in this book. Scientific bases of dendroclimatology Chapter 3: How well understood are the processes that create tree-ring records? - G. Vaganov Starting at the most basic level of the environmental control of tree-ring formation, do we have the necessary biological and ecophysiological understanding of this to support inferences about climate variability from tree rings? What are the weak points of this understanding and how might they be strengthened? Chapter 4: The state of the art of quantitative methods in dendroclimatology - E. Cook How sound are the quantitative techniques commonly used in dendroclimatology, in chronology building, identification and reconstruction of climate variables and the checking of these reconstructions? Are they appropriate to the material being analyzed and to the climatological problems being addressed? How might they be improved? Chapter 5: Detecting low-frequency change using tree rings - K. Briffa What limits the ability of tree-ring records to faithfully record climate variability at low frequencies (multi-centennial to millennial)? How might those limitations be overcome, if at all? What are the advantages and limitations of older and more novel approaches? What are the implications of these limitations? Reconstruction of climate patterns and values relative to today's climate Chapter 6: Dendroclimatology at regional and continental scales - R. Villalba What have been the major contributions of dendroclimatology to climatology so far? In what regions and for which climate problems is exciting progress now being made? What next? Chapter 7: Dendroclimatology at hemispheric and global scales - M. K. Hughes and M. Mann What are the achievements of dendroclimatology as applied at hemispheric and global scales climate patterns, circulation indices and large-scale means? What are the limitations of this approach? How might they be overcome? How might dendroclimatology contribute to the study of central pressing problems such as "How big is climate sensitivity? How has the last century, and especially recent decades, compared with earlier centuries? How faithful a representation of variability in recent centuries does the 20th century instrumental record give? Particular attention will be given to: a) identifying the most robust findings; and b) the most serious limitations. Chapter 8: Dendroclimatology, dendrohydrology and water resources management - C. Woodhouse and D. Meko How may dendroclimatology contribute to the study of water resources? How may it be used to inform modern public and decision-maker expectations of climate variability? Chapter 9: Dendroclimatology and the ecosystem impacts of climate - Th. W. SwetnamHow has dendroclimatology contributed to disturbance ecology? What is the significance of the recent changes in tree-growth-climate relationships observed in some regions, not only for dendroclimatology, but also for the understanding of the impacts of climate variability and change on ecosystems? Chapter 10: Dendroclimatology and the understanding of the interactions between climate variability and ancient human societies - D. Stahle and J. DeanHow has dendroclimatology contributed to understanding of the relationships between climate variability and societies in ancient times? Chapter 11: Tree rings and climate- sharpening the focus - M. K. Hughes, H. F. Diaz and Th. W. Swetnam What has been learned, using tree rings, about natural climate variability and its environmental and social impacts? What are the most significant strengths and weaknesses of dendroclimatology and the needs of, and opportunities for, future work.
    Description / Table of Contents: This volume presents an overview of the current state of dendroclimatology, its contributions over the last 30 years, and its future potential. The material included is useful not only to those who generate tree-ring records of past climate-dendroclimatologists, but also to users of their results - climatologists, hydrologists, ecologists and archeologists.
    Type of Medium: Monograph available for loan
    Pages: xii, 365 S. : Ill., graph. Darst.
    ISBN: 9781402040108
    Series Statement: Developments in paleoenvironmental research 11
    Classification:
    Historical Geology
    Language: English
    Note: Contents: Part I Introductory Section. - 1 High-Resolution Paleoclimatology / Raymond S. Bradley. - 2 Dendroclimatology in High-Resolution Paleoclimatology / Malcolm K. Hughes. - Part II Scientific Bases of Dendroclimatology. - 3 How Well Understood Are the Processes that Create Dendroclimatic Records? A Mechanistic Model of the Climatic Control on Conifer Tree-Ring Growth Dynamics / Eugene A. Vaganov, Kevin J. Anchukaitis, and Michael N. Evans. - 4 Uncertainty, Emergence, and Statistics in Dendrochronology / Edward R. Cook and Neil Pederson. - 5 A Closer Look at Regional Curve Standardization of Tree-Ring Records: Justification of the Need, a Warning of Some Pitfalls, and Suggested Improvements in Its Application / Keith R. Briffa and Thomas M. Melvin. - 6 Stable Isotopes in Dendroclimatology: Moving Beyond ‘Potential’ / Mary Gagen, Danny McCarroll, Neil J. Loader, and Iain Robertson. - Part III Reconstruction of Climate Patterns and Values Relative to Today’s Climate. - 7 Dendroclimatology from Regional to Continental Scales: Understanding Regional Processes to Reconstruct Large-Scale Climatic Variations Across the Western Americas / Ricardo Villalba, Brian H. Luckman, Jose Boninsegna,Rosanne D. D’Arrigo, Antonio Lara, Jose Villanueva-Diaz, Mariano Masiokas, Jaime Argollo, Claudia Soliz, Carlos LeQuesne, David W. Stahle, Fidel Roig, Juan Carlos Aravena, Malcolm K. Hughes, Gregory Wiles, Gordon Jacoby, Peter Hartsough, Robert J.S. Wilson, Emma Watson, Edward R. Cook, Julian Cerano-Paredes, Matthew Therrell, Malcolm Cleaveland, Mariano S. Morales, Nicholas E. Graham, Jorge Moya, Jeanette Pacajes, Guillermina Massacchesi, Franco Biondi, Rocio Urrutia, and Guillermo Martinez Pastur. - Part IV Applications of Dendroclimatology. - 8 Application of Streamflow Reconstruction to Water Resources Management / David M. Meko and Connie A. Woodhouse. - 9 Climatic Inferences from Dendroecological Reconstructions / Thomas W. Swetnam and Peter M. Brown. - 10 North American Tree Rings, Climatic Extremes, and Social Disasters / David W. Stahle and Jeffrey S. Dean. - Part V Overview. - 11 Tree Rings and Climate: Sharpening the Focus / Malcolm K. Hughes, Henry F. Diaz, and Thomas W. Swetnam. - Index.
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  • 39
    Call number: AWI G3-08-0050
    Description / Table of Contents: В сборнике опубликованы расширенные тезисы докладов российских, немецких, японских, китайских, монгольских, шведских и американских ученых на Международной конференции «Современные проблемы и будущее геокриологии», посвященной 100-летmо со дня ро)lщения одного из основоположников геокриологической науки, организатора и первого директора Института мерзлотоведения СО РАН, первого президента Международной ассоциации по мерзлотоведенmо, Героя Социалистического Труда, заслуженного деятеля науки Российской Федерации и Республики Саха (Якутия), действительного члена Академии наук СССР и РАН Павла Ивановича Мельникова (1908-1994 гг.). Материалы конференции посвящены вопросам региональной и исторической геокриологии, криогенным процессам и явлениям, гидрологии и гидрогеологии криолитозоны, динамике криогенных ландшафтов и эволюции криолитозоны под влиянием климата и антропогенных воздействий, устойчивости инженерных сооружений на мерзлых основаниях. Сборник предназначен для ученых, студентов и аспирантов в целях эффективного решения современных вопросов геокриологии и разработки программ развития научных исследований на перспективу.
    Description / Table of Contents: This volume contains the extended abstracts submitted to the International Geocryological Conference "The Present and Future of Geocryology" from Russia, Germany, Japan, China, Mongolia, Sweden and the USA. This Conference is organized to commemorate the 100th birthday of Pavel I. Melnikov (1908-1994), Full Member of the USSR and Russian Academy of Sciences, who was one of the pioneers of geocryological science, founder and first director of the Permafrost Institute at Yakutsk and first president of the International Permafrost Association. The conference papers discuss the issues related to regional and historical geocryology; periglacial processes and forms; hydrology and hydrogeology in cold regions; landscape dynamics and permafrost evolution under the effects of climate change and human activities; and stability of engineering structures built on frozen ground. This volume is intended for researchers, students and post-graduates to help them efficiently solve the current geocryological problems and devise future research lines.
    Type of Medium: Monograph available for loan
    Pages: 98 Seiten , Illustrationen
    ISBN: 9785932540893 , 978-5-93254-089-3
    Language: Russian
    Note: СОДЕРЖАНИЕ Пленарные доклады О роли академика П.И. Мельникова в становлении сибирской геокриологической научной школы / В.В. Шепелев Глобальные изменения климата и криолитозона (ретроспективный анализ и прогноз) / В. Т. Балобаев, Ю.Б. Скачков Перспектива создания молодежных международных проектов геокриологических исследований юга Сибирской платформы / М.Н. Железняк 15 лет российско-германского сотрудничества в области геокриологии / Х-В. Хуббертен, М.Н. Григорьев, Н.Н. Романовский, Д.Ю. Большиянов Региональная и историческая геокриология Рельеф и возраст аллювиального покрова долины р. Лены на «Якутском разбое» / В.В. Спектор Предварительная схема мерзлотноландшафтной дифференциации Монголии / А.А. Шестакова Начало геокриологических исследований на Северо-Востоке России / Ю.Г. Слепцова, Ф.В. Митин Характеристика повторно-жильных льдов на территорииЛредверхоянскоrо прогиба (Северо-Восток Сибири) / Штеффен Попп Позднеплейстоценовые оледенения на Верхоянском хребте (Северо-Восток Сибири) / Г. Штаух, Ш. Попп, В. Спектор, И. Белолюбский, Ф. Лемкул PYRN-TSP Scandinavia: Вклад в проект МПГ «Тепловое состояние криолитозоны» / А.В. Прокопьев,К. Зигерт, Б. Дикман, Х. Лантуит, М. Йоханссон, О.У. Фраунфельд Криогенные процессы и явления Разработка легенды опасности термокарста / Ю.В. Станшzовская, Д.О. Сергеев Изучение формирования многолетних бугров пучения на низких террасах р . Лены в Центральной Якутии / Я.В. Стамбовская Палеокриогенные явления в верхнеплейстоценовых отложениях Пур-Надымского междуречья / О.Л. Опокина Процессы морозного пучения грунтов Южной Якутии / А.А. Урбан Использование данных дистанционного зондирования для оценки опасных гравитационных геокриологических процессов в горах / С.А. Гавршzова Картирование горной криолитозоны на основе результатов моделирования / А. Саруулзая, Я. Джаббалджав, А. Даштсэрэн , Д. Солонго, Д. Доржготов, Ю. Йиджима, М. Ишикава, Й. Чжаи, Т. Кадота, Т. Охата Гидрология и гидрогеология мерзлой зоны Районирование территории Центральной Якутии по эффективности пользования метода искусственного восполнения запасов подземных вод / А.В. Сычевский Параметризация гидрологических процессов в зоне многолетней мерзлоты на основе данных экспериментальных наблюдений / И.Н. Бельдиман Бугорообразование в зоне выхода межмерзлотных подземных вод источника Юрюю (Центральная Якутия) / В.С. Ефремов Моделирование условий теплообмена на участке разгрузки подземных вод в Центральной Якутии (на примере источника Улахан-Тарын) / Л.А. Гаzарин Изменение тепло- и температуропроводности сред, имитирующих гидратоносные донные осадки / М.Е. Пермякова, Д.Е. Аюнов Влияние колебаний климата на многолетнюю изменчивость параметров надмерзлотно-межмерзлотных водоносных горизонтов Бестяхской террасы р. Лены / А.Б. Колесников Моделирование процессов формирования стоков в бассейне р. Лены / О.М. Семенова Гидролого-гидрохимические особенности рек Арктической зоны Западной Сибири. Характеристика стока растворенных веществ / А.А. Четверова, И.В. Федорова, Т.М. Потапова Биологически активные вещества в озерах г. Якутска / А.Л. Чижук Водные свойства четвертичных отложений долины Туймаада / А.А. Фалини Особенности химического состава озерных вод восточного склона Полярного Урала / Н.В. Гусева, К.А. Климов Дистанционное зондирование пространственно-временных изменений термокарстовых озер в Северной Якутии / Гвидо Гроссе, Владимир Романовский, Кейти Уолтер Оценка реакции криолитозоны и криогенных ландшафтов на изменения климата и техногенные воздействия Сравнение фактических и модельных данных о реакции многолетней мерзлоты на изменение внешних условий теплообмена (на примере Надым-Пур-Тазовского региона) / Ю.А. Ухова, Д.О. Сергеев, Ю.В. Станиловская, А.Б. Осокин Растительный покров как индикатор пространственно-временной дифференциации Монголии / А.В. Хомутов О захоронении твердых бытовых отходов в г. Якутске / Д.Ю. Покрышка О принципиальной возможности захоронения СО2 в криолитозоне Западной Сибири / Д.Е. Аюнов, М.Е. Пермяков Изменение ландшафтных условий под воздействием техногенных нагрузок на участке террасы газопровода Надым - Пунга / Е.В. Еланцев Разработка и применение противопучинных мероприятий для опор контактной сети на Забайкальской железной дороге / З.Б. Дашинимаев, В.Г. Кондратьев Инженерно-геокриологический мониторинг на трассе строящейся железной дороги Томмот - Якутск / А.В. Литовко Прогноз теплового взаимодействия насьши с грунтами основания проектируемого участка «станция Олень - разъезд Боттома» железнодорожной трассы Томмот - Якутск / А.В. Сандаков Роль криогенных процессов в формировании рельефа и заболачивании урбанизированной территории криолитозоны (на примере г. Якутска) / Н.А. Сычевская Влияние процесса сезонного промерзанияпротаивания на гранулометрический состав грунтов сезонного слоя / И.В. Лукашин Экспериментальное определение температуры начала кристаллизации порового раствора в зависимости от его минерализации / А.А. Семерня Изменчивость вегетационного периода во второй половине ХХ в. на Северо-Востоке Сибири / Марко Лангер, Йорг-Фридхельм Фенцке Деградация ММП на Цинхай-Тибетском нагорье и обеспечение устойчивости грунтов в основании железной дороги / Ню Фуцзюнь, Линь Чжаньцзюй, Сюй Цзянь. Анализ результатов экспериментальных исследований на участке вентилируемой насыпи Цинхай-Тибетской железнодорожной магистрали / Юй Цихао, Цянь Цзинь, Пань Сицаи Список участников , TABLE OF CONTENTS Plenary Papers The contribution of Academician P.I. Melnikov to the Siberian geocryological school / V. V. Shepelev Global climatic change and permafrost (Retrospective analysis and prediction) / V. T. Balobaev, Y.B. Skachkov The prospects for establishing youth projects in geocryology in the southern siberian platform / M. N. Zheleznyak 15 Years of Russian-German Cooperation in Geocryology / H.-W. Hubberten, M.N. Grigoriev, N.N. Romanovski and D. Yu.Bolshiyanov Regional and Historical Geocryology Relief and age of the alluvial cover in the Lena valley at Yakutsky Razboy / V. V. Spektor Permafrost-Landscape Differentiation of Mongolia: A Preliminary Scheme / A.A. Shestakova First geocryological observations in northeastern Russia / Y. G. Sleptsova, F. V. Mitin Ice-wedge occurrence in the Verkhoyansk Foreland, Yakutia, north-eastern Siberia / Steffen Popp Late Pleistocene glaciations in the Verkhoyansk Mountains, North-Eastern Siberia / G. Stauch, S. Popp, V. Spektor, L. Belolyubsky, A. V. Prokopiev, C. Siegert, B. Diekmann, F. Lehmkuhl PYRN-TSP Scandinavia: Contribution to IPY's "Thermal State of Permafrost" / H. Lantuit, M. Johansson, O. W.Frauenfeld Periglacial Processes and Forms Developing the thermokarst hazard legend / Y. V. Stanilovskaya, D.O. Sergueev Formation of perennial frost mounds on the Lena River low terraces, Central Yakutia / Y. V. Stambovskaya Paleocryogenic features in Upper Pleistocene sediments between the Pur and Nadym Rivers / O.L. Opokina Frost heaving in southern Yakutia / A.A. Urban The use of remote sensing data for evaluating frost-related mountain slope hazards / S.A. Gavrilova Mapping the mountain permafrost based on the modeling results / A. Saruulzaya, Ya. Jambaljav, A. Dashtseren, D. Solongo, D. Dorjgotov, Y. Iijima, M. Ishikawa, Y. Zhang, T. Kadota, T. Ohata Hydrology and Hydrogeology in Cold Regions . Zonation of Central Yakutia Based on Artificial Groundwater Recharge Method Efficiency / A. V. Sychevsky Parameterization of hydro logic processes in the permafrost zone based on experimental observation data / LN. Beldiman Formation of seasonal frost mounds in talik groundwater discharge areas - an example of Eruu spring, Central Yakutia / V.S. Efremov Modeling the heat exchange conditions for a groundwater discharge site in Central Yakutia - an example of Ulakhan-Taryn spring / L.A. Gagarin Changes in thermal conductivity and thermal diffusivity of media simulating hydrate-bearing bottom deposits / M.E. Permyakov, D.E. Ayunov The effect of climatic variations on supra- and intrapermafrost aquifers in the Bestyach terrace of the Lena river / A.B. Kolesnikov Modeling of runoff processes in the Lena basin / O.M. Semenova Hydrology and chemistry of the Arctic rivers in West Siberia: Dissolved solid yield / A.A. Chetverova, L V. Fedorova, T.M. Potapova Biologically active substances in the city of Yakutsk lakes / A.L. Chizhuk Hydraulic properties of Quaternary deposits in the Tuymaada valley / A.A. Falina Lake water chemistry on the Polar Urals eastern slope / N. V. Guseva, K.A. Klimov Remote sensing of spatio-temporal changes of thermokarst lakes and ponds in north yakutia / Guido Grosse, Vladimir Romanovsky, Katey Walter Response of Permafrost Terrain to Climate Change and Human Activities Comparison of observation and modeling data on permafrost response to changes in the surface energy regime: Nadyr-Pur-Tazovsky case study / Y.A. Ukhova, D.O. Sergueev, Y. V. Stanislavskaya, A.B. Osokin Vegetation as an indicator for spatio-temporal differentiation of Mongolia / A. V. Khomutov Solid waste disposal at Yakutsk / D. Y. Pokryshka The feasibility of CO2 storage in permafrost in West Siberia / D.E. Ayunov, M.E. Permyakov. Man-induced changes in landscape conditions along the terrace section of the Nadym-Punga gas pipeline / E. V. Elantsev Development and use of heave control measures for the Trans-Baikal Railroad contact line supports / Z.B. Dashinimaev, V.G. Kondratyev Geocryological monitoring of the Tommot-Yakutsk railroad embankment / A. V. Litovko Predicting the thermal interaction between the embankment and the subgrade for the Olen to Bottorna section of the Tommot-Yakutsk Railroad / A. V. Sandakov The effects of frost action on topography and pa!udification of urban areas in the permafrost zone: an example of Yakutsk / N.A. Sychevskaya The effect of seasonal thawing-freezing cycles on grain-size distribution in the active-layer soils / L V. Lukashin Experimental determination of the freezing temperature of soil pore solution in relation to its mineralization / A.A. Semernya The Development of Growing Season during the Second Half of the 20th Century in Northeast Siberia / Marco Langer, Jorg-Fridchel'm Fencke Permafrsot degradation in Qinghai-Tibet plateau and thermal stability of the railway / Niu Fujun, Lin Zhanju, Xu Jian Experiment results analysis about the temperature controlled ventilated embankment of Qinghai-Tibet railway / Yu Qihao, Qian Jin, Pan Xicai List of Participants , In kyrillischer Schrift
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  • 60
    Call number: ZSP-403-290
    In: Jare Data Reports
    Type of Medium: Series available for loan
    Pages: 7 S. : überw. graph. Darst., Ill.
    Series Statement: Jare Data Reports 290 : Marine Biology 34
    Language: English
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  • 61
    Call number: ZSP-403-287
    In: Jare Data Reports
    Type of Medium: Series available for loan
    Pages: 59 S. : überw. graph. Darst.
    Series Statement: Jare Data Reports 287 : Upper Atmosphere Physics 22
    Language: English
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  • 62
    Call number: ZSP-403-285
    In: Jare Data Reports
    Type of Medium: Series available for loan
    Pages: 112 S. : überw. graph. Darst. u. Ill.
    Series Statement: Jare Data Reports 285 : Seismology 40
    Language: English
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  • 63
    Call number: ZSP-403-284
    In: Jare Data Reports
    Type of Medium: Series available for loan
    Pages: 16 S. : überw. graph. Darst. u. Ill.
    Series Statement: Jare Data Reports 284 : Marine Biology 32
    Language: English
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  • 64
    Call number: ZSP-403-280
    In: Jare Data Reports
    Type of Medium: Series available for loan
    Pages: 54 S. : überw. graph. Darst.
    Series Statement: Jare Data Reports 280 : Seismology 39
    Language: English
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  • 65
    Call number: ZSP-760/A-13
    In: Terra Antartica reports
    Type of Medium: Series available for loan
    Pages: V, 110 S. : graph. Darst., Ill.
    ISBN: 9788888395050
    Series Statement: Terra Antartica reports 13
    Language: English
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  • 66
    Monograph non-lending collection
    Monograph non-lending collection
    [Tokyo] : Japan Aerospace Exploration Agency
    Associated volumes
    Call number: ZSP-405a-08-0004
    In: JAXA Research and Development Report
    Type of Medium: Monograph non-lending collection
    Pages: 29 S.
    Series Statement: JAXA Research and development report RR-06-015E
    Language: English
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  • 67
    Monograph available for loan
    Monograph available for loan
    Chichester : Wiley
    Call number: AWI G3-08-0013 ; 13/M 13.0053 ; AWI G3-22-5374
    Description / Table of Contents: The periglacial environment, Third Edition, provides an authoritative overview of the world's cold, non-glacial environments. Emphasis is placed upon the North American and Eurasian polar lowlands. Examples are also drawn from Antarctica, the Qinghai-Xizang (Tibet) Plateau, and the northern mid-latitudes. [...] The Third Edition continues to be a personal interpretation of the frost-induced conditions, geomorphic processes, and landforms that typify periglacial environments. The text is divided into four parts. Part One discusses the periglacial concept and its interactions with geomorphology, geocryology and Quaternary science. It also outlines the range and variability of periglacial climates and the degree to which landscapes are in geomorphic equilibrium with prevailing periglacial conditions. Part Two describes present-day terrain that is either underlain by permafrost or experiencing intense frost action. The roles played by cryogenic weathering, ground ice, mass wasting, running water, wind action, snow and ice, and coastal processes are systematically analysed. Part Three summarizes evidence for the existence of periglacial conditions during the cold periods of the Pleistocene. Special reference is made to the mid-latitudes of Europe and North America. Part Four illustrates the geotechnical problems associated with human activity and resource development in periglacial environments, and discusses the potential impact of global climate change in the northern high latitudes.
    Type of Medium: Monograph available for loan
    Pages: XVIII, 458 Seiten , Illustrationen
    Edition: Third edition
    ISBN: 9780470865897
    Classification:
    Geography and Geomorphology
    Language: English
    Note: Contents: Preface to First Edition. - Preface to Second Edition. - Preface to Third Edition. - Acknowledgments. - Part I The Periglacial Domain. - 1 Introduction. - 1.1 The Periglacial Concept. - 1.2 Disciplinary Considerations. - 1.2.1 The Growth of Geocryology. - 1.2.2 The Changing Nature of Quaternary Science. - 1.2.3 Modern Periglacial Geomorphology. - 1.3 The Growth of Periglacial Knowledge. - 1.4 The Periglacial Domain. - 1.5 The Scope of Periglacial Geomorphology. - 1.5.1 Permafrost-Related Processes and Landforms. - 1.5.2 Azonal Processes and Landforms. - 1.5.3 Paleo-Environmental Reconstruction. - 1.5.4 Applied Periglacial Geomorphology. - Advanced Reading. - Discussion Topics. - 2 Periglacial Landscapes?. - 2.1 Introduction. - 2.2 Proglacial, Paraglacial or Periglacial?. - 2.3 Unglaciated Periglacial Terrain. - 2.3.1 Beaufort Plain, Northwest Banks Island, Arctic Canada. - 2.3.2 Barn Mountains, Northern Interior Yukon Territory, Canada. - 2.4 Relict Periglacial Landscapes. - 2.4.1 Chalk Uplands, Southern England and Northern France. - 2.4.2 Pine Barrens, Southern New Jersey, Eastern USA. - 2.5 Conclusions. - Advanced Reading. - Discussion Topics. - 3 Periglacial Climates. - 3.1 Boundary Conditions. - 3.2 Periglacial Climates. - 3.2.1 High Arctic Climates. - 3.2.2 Continental Climates. - 3.2.3 Qinghai-Xizang (Tibet) Plateau. - 3.2.4 Alpine Climates. - 3.2.5 Climates of Low Annual Temperature Range. - 3.2.6 Antarctica: A Special Case. - 3.3 Ground Climates. - 3.3.1 The n-Factor. - 3.3.2 The Thermal Offset. - 3.4 Periglacial Climates and the Cryosphere. - Advanced Reading. - Discussion Topics. - Part II Present-Day Periglacial Environments. - 4 Cold-Climate Weathering. - 4.1 Introduction. - 4.2 Ground Freezing. - 4.2.1 The Freezing Process. - 4.2.2 Ice Segregation. - 4.2.3 The Frozen Fringe. - 4.2.4 Frost Heave. - 4.3 Freezing and Thawing. - 4.4 The Ground-Temperature Regime. - 4.4.1 The Seasonal Regime. - 4.4.2 Short-Term Fluctuations. - 4.5 Rock (Frost?) Shattering. - 4.5.1 Frost Action and Ice Segregation. - 4.5.2 Frost Weathering Models. - 4.5.3 Insolation Weathering and Thermal Shock. - 4.5.4 Discussion and Perspective. - 4.6 Chemical Weathering. - 4.6.1 General. - 4.6.2 Solution and Karstification. - 4.6.3 Salt Weathering. - 4.7 Cryogenic Weathering. - 4.8 Cryobiological Weathering. - 4.9 Cryopedology. - 4.9.1 Cryosols. - 4.9.2 Soil Micromorphology. - Advanced Reading. - Discussion Topics. - 5 Permafrost. - 5.1 Introduction. - 5.1.1 Definition. - 5.1.2 Moisture and Ice within Permafrost. - 5.2 Thermal and Physical Properties. - 5.2.1 The Geothermal Regime. - 5.2.2 Physical Properties. - 5.2.3 Thermal Properties. - 5.3 How Does Permafrost Aggrade?. - 5.3.1 General Principles. - 5.3.2 The Illisarvik Drained-Lake Experiment. - 5.4 Distribution of Permafrost. - 5.4.1 Latitudinal Permafrost. - 5.4.2 Alpine (Mountain) Permafrost. - 5.4.3 Montane Permafrost of Central Asia and China. - 5.5 Relict Permafrost. - 5.5.1 Sub-Sea Permafrost. - 5.5.2 Relict (Terrestrial) Permafrost. - 5.6 Permafrost Hydrology. - 5.6.1 Aquifers. - 5.6.2 Hydrochemistry. - 5.6.3 Groundwater Icings. - 5.7 Permafrost and Terrain Conditions. - 5.7.1 Relief and Aspect. - 5.7.2 Rock Type. - 5.7.3 Vegetation. - 5.7.4 Snow Cover. - 5.7.5 Fire. - 5.7.6 Lakes and Surface Water Bodies. - 5.8 The Active Layer. - 5.8.1 The Transient Layer. - 5.8.2 The Stefan Equation. - 5.8.3 Active-Layer Thermal Regime. - Advanced Reading. - Discussion Topics. - 6 Surface Features of Permafrost. - 6.1 Introduction. - 6.2 Thermal-Contraction-Crack Polygons. - 6.2.1 Coefficients of Thermal Expansion and Contraction. - 6.2.2 Ice, Sand, and Soil Wedges. - 6.2.3 Development of the Polygon Net. - 6.2.4 Polygon Morphology. - 6.2.5 Controls Over Cracking. - 6.2.6 Climatic Significance. - 6.3 Organic Terrain. - 6.3.1 Palsas. - 6.3.2 Peat Plateaus. - 6.4 Rock Glaciers. - 6.4.1 Creeping Permafrost. - 6.4.2 Types and Distribution. - 6.4.3 Origin. - 6.5 Frost Mounds. - 6.5.1 Perennial-Frost Mounds. - 6.5.2 Hydraulic (Open) System Pingos. - 6.5.3 Hydrostatic (Closed) System Pingos. - 6.5.4 Other Perennial-Frost Mounds. - 6.5.5 Seasonal-Frost Mounds. - 6.5.6 Hydrolaccoliths and Other Frost-Induced Mounds. - 6.6 Active-Layer Phenomena. - 6.6.1 Bedrock Heave. - 6.6.2 Needle Ice. - 6.6.3 Cryoturbation and Frost Heave. - 6.6.4 Frost Sorting. - 6.6.5 Patterned Ground. - Advanced Reading. - Discussion Topics. - 7 Ground lce. - 7.1 Introduction. - 7.2 Classification. - 7.2.1 Pore Ice. - 7.2.2 Segregated Ice. - 7.2.3 Intrusive Ice. - 7.2.4 Vein Ice. - 7.2.5 Other Types of Ice. - 7.3 Ice Distribution. - 7.3.1 Amounts. - 7.3.2 Distribution with Depth. - 7.3.3 Ice in Bedrock. - 7.3.4 Ice in Unconsolidated Sediments. - 7.4 Cryostratigraphy and Cryolithology. - 7.4.1 Cryostructures, Cryotextures, and Cryofacies. - 7.4.2 Epigenetic and Syngenetic Cryostructures. - 7.4.3 Thaw Unconformities. - 7.4.4 Ice Crystallography. - 7.4.5 Ice Geochemistry. - 7.4.6 Cryostratigraphy and Past Environments. - 7.5 Ice Wedges. - 7.5.1 Epigenetic Wedges. - 7.5.2 Syngenetic Wedges. - 7.5.3 Anti-Syngenetic Wedges. - 7.6 Massive Ice and Massive-Icy Bodies. - 7.6.1 Nature and Extent. - 7.6.2 Intra-Sedimental Ice. - 7.6.3 Buried Glacier Ice. - 7.6.4 Other Mechanisms. - Advanced Reading. - Discussion Topics. - 8 Thermokarst. - 8.1 Introduction. - 8.2 Causes of Thermokarst. - 8.2.1 General. - 8.2.2 Specific. - 8.3 Thaw-Related Processes. - 8.3.1 Thermokarst Subsidence. - 8.3.2 Thermal Erosion. - 8.3.3 Other Processes. - 8.4 Thermokarst Sediments and Structures. - 8.4.1 Involuted Sediments. - 8.4.2 Retrogressive-Thaw-Slumps and Debris-Flow Deposits. - 8.4.3 Ice-Wedge Pseudomorphs and Composite-Wedge Casts. - 8.4.4 Ice, Silt, Sand, and Gravel Pseudomorphs. - 8.5 Ice-Wedge Thermokarst Relief. - 8.5.1 Low-Centered Polygons. - 8.5.2 High-Centered Polygons. - 8.5.3 Badland Thermokarst Relief. - 8.6 Thaw Lakes and Depressions. - 8.6.1 Morphology. - 8.6.2 Growth and Drainage. - 8.6.3 Oriented Thaw Lakes. - 8.7 Thermokarst-Affected Terrain. - 8.7.1 The Lowlands of Central and Northern Siberia. - 8.7.2 The Western North American Arctic. - 8.8 Human-Induced Thermokarst. - 8.8.1 Causes. - 8.8.2 Case Studies. - Advanced Reading. - Discussion Topics. - 9 Hillslope Processes and Slope Evolution. - 9.1 Introduction. - 9.2 Slope Morphology. - 9.2.1 The Free-Face Model. - 9.2.2 Rectilinear Debris-Mantled Slopes. - 9.2.3 Convexo-Concavo Debris-Mantled Slopes. - 9.2.4 Pediment-Like Slopes. - 9.2.5 Stepped Profiles. - 9.3 Mass Wasting. - 9.4 Slow Mass-Wasting Processes. - 9.4.1 Solifluction. - 9.4.2 Frost Creep. - 9.4.3 Gelifluction. - 9.4.4 Solifluction Deposits and Phenomena. - 9.5 Rapid Mass Wasting. - 9.5.1 Active-Layer-Detachment Slides. - 9.5.2 Debris Flows, Slushflows, and Avalanches. - 9.5.3 Rockfall. - 9.6 Slopewash. - 9.6.1 Snow-Bank Hydrology. - 9.6.2 Surface and Subsurface Wash. - 9.7 Frozen and Thawing Slopes. - 9.7.1 Permafrost Creep. - 9.7.2 Thermokarst and Thaw Consolidation. - 9.7.3 Stability of Thawing Slopes. - 9.8 Cold-Climate Slope Evolution. - 9.8.1 Cryoplanation. - 9.8.2 Slope Replacement and Richter Denudation Slopes. - 9.8.3 Rapidity of Profile Change. - 9.8.4 Summary. - Advanced Reading. - Discussion Topics. - 10 Azonal Processes and Landforms. - 10.1 Introduction. - 10.2 Fluvial Processes and Landforms. - 10.2.1 Major Rivers. - 10.2.2 Freeze-Up and Break-Up. - 10.2.3 Basin Hydrology. - 10.2.4 Sediment Flow, Surface Transport, and Denudation. - 10.2.5 Fluvio-Thermal Erosion. - 10.2.6 Channel Morphology. - 10.2.7 Valley Asymmetry. - 10.3 Eolian Processes and Sediments. - 10.3.1 Wind Abrasion. - 10.3.2 Wind Deflation. - 10.3.3 Niveo-Eolian Sediments. - 10.3.4 Loess-Like Silt. - 10.3.5 Sand Dunes and San
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  • 68
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-79/8
    In: CRREL Report, 79-8
    Description / Table of Contents: Sea ice ridging statistics obtained from a series of laser surface roughnessprofiles are examined. Each set of profiles consists of six 200-km-long flight tracks oriented approximately perpendicular to the coastline of the Chukchi and Beaufort Seas. The landward ends of the profiles were located at Point Lay, Wainwright, Barrow, Lonely, Cross Island and Barter Island. The flights were made in February, April, August, and December 1976, and one additional profile was obtained north of Cross Island during March 1978. It was found that although there is a systematic variation in mean ridge height (h) with season (with the highest values occurring in late winter), there is no systematic spatial variation in h at a given time. The number of ridges/km (micron) is also high during the late winter, with the highest values occurring in the Barter and Cross Island profiles . In most profiles, the ice 20 to 60 km from the coast is more highly deformed (higher micron values) than the ice either nearer the coast or farther seaward. The Wadhams model for the distribution of ridge heights gives better agreement with observed values in the higher ridge categories than does the Hibler model. Estimates of the spatial recurrence frequency of large pressure ridges are made by using the Wadhams model and also by using an extreme value approach. In the latter, the distribution of the lagest ridges per 20 km of laser track was found to be essentially normal
    Type of Medium: Series available for loan
    Pages: iv, 28 Seiten , Illustrationen
    Series Statement: CRREL Report 79-8
    Language: English
    Note: CONTENTS Abstract Preface Introduction Data collection and processing Analysis General Variations in ridging Ridge height distributions Occurrence of high ridges The tail of the distribution Extreme values Applications to offshore design Conclusions Literature cited Appendix A. Tabulated ice ridge data
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  • 69
    Monograph available for loan
    Monograph available for loan
    Potsdam : Alfred-Wegener-Inst. für Polar- und Meeresforschung
    Call number: AWI G3-08-0009
    Type of Medium: Monograph available for loan
    Pages: VIII, 108 S. : Ill., graph. Darst.
    Classification:
    Meteorology and Climatology
    Language: English
    Note: Bremen, Univ., Diss., 2007
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  • 70
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-78/2
    In: CRREL Report, 78-2
    Description / Table of Contents: Many of the technical questions relating to iceberg transport are given brief, but quantitative, consideration. These include iceberg genesis and properties, the mechanical stability of icebergs at sea, towing forces and tug characteristics, drag coefficients, ablation rates, and handling and processing the iceberg at both the pick-up site and at the final destination. In particular the paper attempts to make technical information on glaciological and ice engineering aspects of the problem more readily available to the interested planner or engineer. Specific conclusions include: (1) No unprotected iceberg, no matter how long or wide, would be likely to survive the ablation caused by a long trip to low latitudes. (2) Icebergs that have a horizontal dimension exceeding 2 km may well be prone to breakup by long wavelength swells. (3) To avoid the dangers associated with an iceberg capsizing, the width of a 200-m thick iceberg should always be more than 300 m. (4) For towing efficiency the length/width ratio of a towed iceberg should be appreciably greater than unity. (5) For a pilot project, the selected iceberg would have to be quite small, if for no other reason than the practical availability of tug power.
    Type of Medium: Series available for loan
    Pages: v, 31 Seiten , Illustrationen
    Series Statement: CRREL Report 78-2
    Language: English
    Note: CONTENTS Abstract Preface Introduction Sources and properties of tabular icebergs Sources Characteristics of ice shelves near the ice front Characteristics of tabular icebergs Towing Geophysical and engineering considerations Tug characteristics Handling and processing Cutting and boring with thermal devices Penetration with electrothermal devices Electrothermal cutting Making vertical cuts by pre-split blasting Primary fragmentation by blasting Primary fragmentation by mechanical sawing Comminuting ice with machines Slurry pipelines Conclusion Literature cited
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  • 71
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-77/32
    In: CRREL Report, 77-32
    Description / Table of Contents: An experimental study of forced convective heat transfer over a vertical melting plate has been conducted. This study covers water velocities ranging from 1.7 to 9.8 mm/s and bulk water temperatures from 1.11 to 7.50 C. The experimental results are correlated in terms of Nusselt, Prandtl and Reynolds numbers with a moderate correlation coefficient of 0.843. The results are expected to be useful in predicting the heat transfer characteristics of a much larger prototype ice-water heat sink.
    Type of Medium: Series available for loan
    Pages: v, 12 Seiten , Illustrationen
    Series Statement: CRREL Report 77-32
    Language: English
    Note: CONTENTS Abstract Preface Nomenclature Summary Introduction Problem General review of the subject Experimental apparatus General considerations Water reservoir Test chamber assembly Pumping system Electrical control system Experimental procedure Experimental results Discussion and comparison of results Conclusions Literature cited
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  • 72
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-78/16
    In: CRREL Report, 78-16
    Description / Table of Contents: A model investigation of drifting snow conditions was conducted in a hydraulic flume using a sand-water analog. Model results were evaluated to define modeling parameters that would allow quantitative correlation between measured prototype drift conditions and the model. The modeled structure was the standard plan snow fence designed by the Wyoming Highway Department and installed along Interstate Highway 80 in 1971. The performance of this system was documented by the Rocky Mountain Forest and Range Experiment Station of the U.S. Forest Service. Models of the fence were constructed for three heights and two geometric scales. Geometric scaling was based on terrain roughness and boundary layer thickness considerations, while velocity scaling was based on particle fall velocity and threshold of motion characteristics. Simulation of the atmospheric boundary layer was found to be of primary importance. Velocity scaling analysis suggested the use of a 'significant wind' concept based on a combination of velocity magnitude and frequency. Similarity of precipitation rate was not essential, and could be altered within limits to adjust the time scale. The response of the model to the shape of model elements was significant. Although the model is distorted and inexact similarity is achieved, it appears useful on a practical basis.
    Type of Medium: Series available for loan
    Pages: vi, 26 Seiten , Illustrationen
    Series Statement: CRREL Report 78-16
    Language: English
    Note: CONTENTS Abstract Preface Nomenclature Introduction Background Experimental design Similitude considerations The model Model operation Results Velocity Fence height Porosity Model correlation Summary and conclusions Recommeqdations for future work Literature cited Appendix A
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  • 73
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-78/13
    In: CRREL Report, 78-13
    Description / Table of Contents: Field observations of the growth fabrics of the fast and near-fast ice along the coasts of the Beaufort and Chukchi Seas show that, at depths of more than 60 cm below the upper ice surface, the sea ice crystals show striking alignments within the horizontal plane. At one site this alignment was well developed at a depth of 15 cm and in all cases the degree of preferred orientation increased with depth, with the strongest orientations occurring at the bottom of the ice sheet. In general the c-axes of the crystals were aligned roughly E-W parallel to the coast. In the vicinity of islands the alignment roughly paralleled the outlines of the islands and in narrow passes between islands the alignment paralleled the channel. Our observations, as well as similar observations made in the Kara Sea by Cherepanov, can be explained if it is assumed that the c-axes of the crystals are aligned parallel to the 'long-term' current direction at the sea ice/sea water interface. The alignments are believed to be the result of geometric selection among the growing crystals, with the most favored orientation being that in which the current flows normal to the (0001) plates of ice that make up the dendritic ice/water interface characteristics of sea ice. It is hypothesized that current flow in this direction reduces the thickness of the solute boundary layer as well as the salinity in the liquid at the interface. This lowered salinity allows crystals in the favored orientation to extend farther into the melt than neighboring crystals with less favored orientations. In addition the current tends to induce a continuous flux of supercooled seawater against the sides of the crystals that extend ahead of the interface.
    Type of Medium: Series available for loan
    Pages: v, 29 Seiten , Illustrationen
    Series Statement: CRREL Report 78-13
    Language: English
    Note: CONTENTS Abstract Preface Introduction Locale and techniques Observations Vertical variations in crystal orientation Regional variations in crystal orientation Summary of observations Causes Initial ice skim Earth’s magnetic field Currents Conclusions and consequences Literature cited
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  • 74
    Call number: ZSP-201-78/12
    In: CRREL Report, 78-12
    Description / Table of Contents: Road test sections of membrane-enveloped silt and clay soils overlain with asphalt cement concrete were subjected to repetitive dynamic plate-bearing loadings to determine their strength variations during freeze-thaw cycles. The recoverable surface deformations in the load deflection bowl were continuously measured during the loading cycles and analyzed using the Chevron layered elastic computer program to obtain the in situ resilient deformation modulus of the various section layers at different stages of the freeze-thaw cycles. The resilient stiffness of the pavement system (the total load per unit of resilient load plate deflection) was also calculated for the various freeze-thaw conditions. The modulus values of the asphalt cement concrete varied inversely with its temperature by an order of magnetide (90,000 psi to 1,300,000 psi). The resilient stiffness of the pavement system varied in the same manner by nearly a factor of eight (228.4 kips/in. to 1740.2 kips/in.). Despite the wide strength variations of the sections during freeze-thaw cycles, membrane-enveloped fine-grained soils can be utilized instead of granular materials as base and subbase layers in flexible pavements in cold regions where moisture migration is a major concern. Moisture migration did not occur at saturation levels up to 75%, thus there was no strength loss during thawing.
    Type of Medium: Series available for loan
    Pages: v, 24 Seiten , Illustrationen
    Series Statement: CRREL Report 78-12
    Language: English
    Note: CONTENTS Abstract Preface Conversion factors: U.S.customary to metric units of measurement Introduction Freeze-thaw system Construction materials Controlled environment test section Outdoor sections Temperature monitoring instrumentation Repetitive plate bearing test apparatus Test results and analyses Conclusions Literature cited
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  • 75
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-78/24
    In: CRREL Report, 78-24
    Type of Medium: Series available for loan
    Pages: v, 12 Seiten , Illustrationen
    Series Statement: CRREL Report 78-24
    Language: English
    Note: CONTENTS Abstract Preface Introduction Comparison of winters Ship effects Measured forces Sequential breaking of the structure Discussion Conclusions Recommendations Literature cited Appendix A. Force level fluctuations in west ice boom, 20 January 1977
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  • 76
    Call number: ZSP-201-78/23
    In: CRREL Report, 78-23
    Type of Medium: Series available for loan
    Pages: vi, 53 Seiten , Illustrationen
    Series Statement: CRREL Report 78-23
    Language: English
    Note: CONTENTS Abstract Preface Nomenclature Conversion factors: Metric (SI) to U.S. customary units of measurement Introduction Selection of experimental approach Previous investigations of effect of freeze-thaw on soil deform ability Selection of laboratory test method Selection of method of field validation tests Field repeated-load plate-bearing tests Test pavements, soils and materials Test procedures and results Resilient modulus of subgrade calculated from field tests Mathematical model Characterization of asphalt concrete Characterization of frozen silt Calculated resilient modulus of silt within the zone of freezing Laboratory repeated-load triaxial tests Specimens, equipment and testing procedures Apparatus Procedures Resilient properties calculated from laboratory tests Calculation methods Asphalt concrete - test results Asphalt concrete - statistical analysis and discussion Silt - test results Silt - statistical analysis Discussion and conclusions Literature cited Appendix A. Repeated-load plate-bearing test results Appendix B. Laboratory repeated-load triaxial test results Appendix C. Regression equation coefficients for resilient modulus and Poisson’s ratio from repeated-load triaxial test data on asphalt concrete and silt Appendix D. Detailed procedures for repeated-load triaxial testing
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  • 77
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-78/22
    In: CRREL Report, 78-22
    Description / Table of Contents: Special environmental factors that influence the design, laying and maintenance of undersea pipelines and cables in polar waters are described. Various approaches to the protection of submarine pipes and cables are considered, and prime emphasis is given to burial techniques for shallow water. A wide range of methods for trenching and burying are discussed, and technical data are given.
    Type of Medium: Series available for loan
    Pages: v, 36 Seiten , Illustrationen
    Series Statement: CRREL Report 78-22
    Language: English
    Note: CONTENTS Abstract Preface Conversion factors Introduction Types of pipelines and cables Potential hazards to pipelines and cables Areas of concern Waterdepth Sea ice Icebergs and ice islands Submarine permafrost Ice gouging Seabed erosion by water jets Protection methods Protection of unburied pipes and cables Protection by burial Backhoe digging Wireline equipment Plowing and ripping from the surface Plowing and ripping by self-propelled seabed vehicles Bucket ladder dredges Suction dredging Conventional cutterhead dredges Low pressure water jetting Bottom-traveling cutterhead dredges Explosive methods Novel methods Disc saws, wheel ditchers and milling drums Ladder trenchers and chain saws Repetitive impulse devices High pressure water jets Flame jets and plasma torches Electrical discharge and electromagnetic radiation Chemical methods Conclusions Literature cited
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  • 78
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-78/21
    In: CRREL Report, 78-21
    Description / Table of Contents: This study investigates the possibility of providing estimates of the time of occurrence and length of the freezing season for any location in East and West Germany by using the average Januavy air temperature (AJ AT) as an index. The results indicate that reliable values of the mean freezing index can be obtained from the AJAT relationships which are developed for Germany. This association is further verified using data from the northeastern part of the U.S., and the AJ AT is then used to determine the average starting and ending dates (and hence the probable length) of the freezing season for stations in Germany. The AJ AT and the average dates of snowfall occurrence for numerous locations in the U.S. and Germany are also correlated. Interrelationships between these parameters and the average number of days with snow on the ground for stations up to 3000 m in elevation in Germany are examined. A detailed AJ AT map for East and West Germany, in which data from 134 stations, latitude, altitude and regional influences are considered, is developed in order to make the relationships usable. A historical review of the literature on snow studies in Germany and a brief discussion of snow-cover interpretation by satellite photography are included
    Type of Medium: Series available for loan
    Pages: v, 48 Seiten , Illustrationen , 1 Karte
    Series Statement: CRREL Report 78-21
    Language: English
    Note: CONTENTS Abstract Preface Introduction Historical literature review Relationships between midwinter temperature and freezing season Mean freezing index 4 Average January air temperature U.S. comparative study Correlation of AJAT and duration of freezing season Relationships between average January air temperature and snow conditions U.S. relationships German relationships Mapping of average January air temperatures Analysis of observed AJ AT data Development of detailed maps Application and discussion Examples Influence of vegetation Literature cited Appendix A. interpretation of snow cover by satellite Appendix B. Contour, station elevation and Aj AT maps for East and West Germany
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  • 79
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-78/19
    In: CRREL Report, 78-19
    Type of Medium: Series available for loan
    Pages: iv, 21 Seiten , Illustrationen
    Series Statement: CRREL Report 78-19
    Language: English
    Note: CONTENTS Abstract Preface Introduction Previous work Methods and results Methods of analysis Salinity-chlorophyll a associations Discussion Comparison of ice and water column standing crops Estimated mass of ice associated chl. a Mechanism of ice algae formation in the Weddell Sea Differences between the biological environments of fast and drifting pack ice Conclusions Literature cited Appendix A. Species variations - ice and water column
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  • 80
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-78/10
    In: CRREL Report, 78-10
    Description / Table of Contents: The compressibility of wet snow is described in terms of pressure melting and nonlinear viscous deformation at grain contacts. The results of experiments with different salinities and liquid water contents are compared with computed densities. The decreasing compressibility of wet snow with increasing salinity and decreasing liquid content is quantified and explained. Simultaneous particle growth and the doubly charged layer at phase boundaries are included in the model. The results show that the density of wet snow increases approximately as a power of time but is highly dependent on the stress, initial particle size, liquid water content, and ionic impurity content of the snow.
    Type of Medium: Series available for loan
    Pages: vi, 23 Seiten , Illustrationen
    Series Statement: CRREL Report 78-10
    Language: English
    Note: CONTENTS Abstract Preface Nomenclature Introduction Experimental procedure Grain growth Stressed particle contacts Fluid pressure Packing geometry Temperature distribution and heat flow Fluid and impurity flows Results The liquid film Conclusions Literature cited
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  • 81
    Monograph available for loan
    Monograph available for loan
    Bremerhaven : Alfred-Wegener-Institut
    Associated volumes
    Call number: ZSP-994(2006/2007)
    In: Zweijahresbericht / AWI, Alfred-Wegener-Institut für Polar- und Meeresforschung, 2006/2007
    Type of Medium: Monograph available for loan
    Pages: 344 Seiten , Illustrationen
    ISSN: 1618-3703
    Series Statement: Zweijahresbericht / AWI, Alfred-Wegener-Institut für Polar- und Meeresforschung 2006/2007
    Language: German , English
    Note: Inhalt = Content 1. Vorwort = Introduction 2. Ausgewählte Forschungsthemen = Selected research topics Rinnen im Meereis: Heizung für die Atmosphäre? = Leads in Sea Ice: Heating the Atmosphere? / Christof Lüpkes, Vladimir Gryanik, Anna Barbara Herold, Gerit Birnbaum, Ulrike Wacker, Jörg Hartmann Die polaren Ozeane vor dem Hintergrund der Klimaänderung – Ein Vergleich = The Polar Oceans in the context of climate change – commons and contrasts / Eberhard Fahrbach, Christian Haas und Ursula Schauer Wissenschaftliches Rechnen und Ozeanographie für das Krisenmanagement: Der Beitrag des Alfred-Wegener-Instituts zum Deutsch-Indonesischen Tsunami-Frühwarnsystem = Scientific computing and oceanography for hazard management: The contribution of the Alfred Wegener Institute to the German-Indonesian Tsunami Early Warning System / Jörn Behrens, Wolfgang Hiller, Jens Schröter Klimaarchiv Eis – Das European Project for Ice Coring in Antarctica (EPICA) = Climate archive in ice - the European Project for Ice Coring in Antarctica (EPICA) / Hubertus Fischer, Frank Wilhelms, Sepp Kipfstuhl, Hans Oerter, Hanno Meyer, Peter Köhler, Rainer Gersonde & Heinz Miller Schwarzschiefer vom Nordpol entschlüsseln Klimageschichte: Der Arktische Ozean war vor 45 Millionen Jahren so warm wie die Ostsee heute = Black shales near the North Pole decipher climate history: The Arctic Ocean at 45 Ma was as warm as the modern Baltic Sea / Ruediger Stein, Petra Weller, Bettina Boucsein und Jens Matthiessen Leben auf dem Mars? Methan-bildende Mikroorganismen aus sibirischen Permafrost-böden als Studienobjekte = Life on Mars? Methane-forming micro-organisms from Siberian permafrost soils as study objects / Dirk Wagner und Daria Morozova Seeelefanten helfen Südozeanmodellierern = Elephant Seals help validate Finite Element Ice-Ocean Model / Ralph Timmermann Neuigkeiten in der Krillforschung: Licht kontrolliert Lebensfunktionen des Krills = News in Krill research: Light controls life functions of krill / Mathias Teschke, Bettina Meyer, Carsten Pape, Susanne Spahic Wie wird man 400 Jahre alt? Altersvorsorge der Islandmuschel (Arctica islandica) = Living 400 years – what is the secret of the ocean quahog (Arctica islandica)? / Doris Abele, Eva Philipp, Julia Strahl, Thomas Brey Langzeitforschung auf Helgoland und Sylt: Ein Finger am Puls der Nordsee = Long-Term Ecological Research at Helgoland and Sylt: Keeping a Finger at the Pulse of the North Sea / Justus E.E. van Beusekom, Maarten Boersma, Karsten Reise and Karen H. Wiltshire 3. Forschung = Research MARCOPOLI 3.1 MARINE 3.2 COAST 3.3 POLAR 3.4 Neue Themen = Additional funding 4. Helmholtz-Nachwuchsgruppen = Helmholtz Young Investigator Groups 5. Entwicklungen in den Fachbereichen = Progresses in the Scientific Divisions 6. Neue Technologien = New technologies 7. Logistik und Forschungsplattformen = Logistics and research platforms 8. Nationale und internationale Zusammenarbeit = National and international cooperation 9. Mariner Umweltschutz = Marine environmental protection 10. Wissenschaftliches Rechenzentrum = Scientific data processing centre 11. Bibliothek = Library 12. Technologietransfer = Technology transfer 13. Presse- und Öffentlichkeitsarbeit = Public relations department 14. Schulprojekt = School project 15. Personeller Aufbau und Haushaltsentwicklung = Personnel structure and budget trends 16. Veröffentlichungen, Patente = Publications, patents Anhang = Annex , Text in deutscher und englischer Sprache
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  • 82
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-77/23
    In: CRREL Report, 77-23
    Description / Table of Contents: This report discusses the relationship between an architect and a behavioral scientist. Some of the discussion applies to this cooperative work for design of buildings. The bulk, however, relates to the cooperation of architect and behavioral scientist while conducting research. Examples from collaborative research at Alaskan military installations are cited which demonstrate the roles and contributions of the two disciplines.
    Type of Medium: Series available for loan
    Pages: 8 Seiten , Illustrationen
    Series Statement: CRREL Report 77-23
    Language: English
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  • 83
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-78/8
    In: CRREL Report, 78-8
    Description / Table of Contents: The interaction of a 5.1-GHz transverse electric surface wave with a dielectric slab is experimentally investigated. The wave is initially supported by a dielectric substrate resting upon a metallic ground-plane. A slab, made of the same dielectric material as the substrate and variable in height, is then placed upon the waveguide. The results for a small slab sitting on the substrate showed that the discontinuity was a very inefficient launcher of reflected surface waves. Investigations of these reflections with a trough waveguide showed that, for values of slab height comparable to the exponential decay height of the surface wave, the reflections remain very small. However, as the slab height is increased beyond the decay height, the reflected amplitude approaches the theoretical value for a plane wave reflected from the interface between air and the same dielectric. The results are applicable to surface wave methods of microwave deicing of wings and helicopter rotors.
    Type of Medium: Series available for loan
    Pages: v, 16 Seiten , Illustrationen
    Series Statement: CRREL Report 78-8
    Language: English
    Note: CONTENTS Abstract Preface Summary Introduction Background Objective and procedure Theory of plane surface waves Waveguide design and characteristics Physical apparatus Frequency characteristics Spatial distribution of Ey above the guide Guide wave length Surface wave interaction with a slab discontinuity Experiments with a trough Discussion and conclusions Literature cited
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  • 84
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-77/25
    In: CRREL Report, 77-25
    Description / Table of Contents: Results of a study to determine the feasibility of using an impulse radar to detect moisture variations in the built-up roof at CRREL and to monitor the curing of concrete are presented. The results indicate that impulse radar can be used to detect wide variations in roof moisture associated with built-up roof surface deterioration and that this technique has the potential of providing a nondestructive test method for measuring the strength of concrete during curing.
    Type of Medium: Series available for loan
    Pages: iv, 9 Seiten , Illustrationen
    Series Statement: CRREL Report 77-25
    Language: English
    Note: CONTENTS Abstract Preface Conversion factors: U.S. customary to metric units of measurement Introduction Impulse radar system Results and discussion Conclusions and recommendations Literature cited ILLUSTRATIONS Figure Relative locations where impulse radar measurements were made andsamples for moisture determinations were obtained on the CRREL roof Impulse radar signal reflected from metal sheet resting on roof Impulse radar signal reflection from roof at station A Impulse radar surface reflection coefficient versus moisture contentofroof Impulse radar signal reflection from aluminum foil on bottom of con-crete form and from aluminum sheet metal resting on top of form Unconfined compressive strength of concrete versus time Examples of X-Y plots of impulse radar signals obtained during thesounding of concrete slab Impulse radar signal reflection coefficients versus time for acuring concrete slab Calculated impulse radar signal attenuation in concrete slab versuselapsed time Dielectric constants versus time calculated from impulse radar signalInformation obtained during curing of concrete slab Unconfined compressive strength of concrete versus corrected reflec-tion coefficient calculated from impulse radar signal data obtainedduring the curing of concrete slab TABLES Comparison of roof moisture content with radar surface reflection coefficient and dielectric constant
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  • 85
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-76/10
    In: CRREL Report, 76-10
    Type of Medium: Series available for loan
    Pages: vi, 25 Seiten , Illustrationen
    Series Statement: CRREL Report 76-10
    Language: English
    Note: CONTENTS Introduction Experimental work SCR samples CAG samples CMS samples UAG samples SI samples Optical system Equipment Procedure Photographic work Large cracks and fissures Small damage to the surface Small damage to the buIk Results Damage as a function of the position x of the focal point; n(x) Damage as a function of the number of irradiations #; n(#) Damage as a function of crystallographic orientation ĉ; n (ĉ); p (ĉ) Damage as a function of surface structure Damage as a function of age A; n (A) Damage as a function of wavelength λ; p(λ) Systematic study of damage as a function of W, t, m and s; n(W, t, m, s) Analysis Fracture in ice Mechanisms for optically generated damage in transparent dielectrics Discussion of the results Summary and conclusions Literature cited
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  • 86
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-76/11
    In: CRREL Report, 76-11
    Description / Table of Contents: Water flow through the unsaturated portion of a snowpack is calculated using various assumptions about radiation penetration into the snow. The results show that for the purposes of hydrologic forecasting, it is sufficiently ac­curate to assume that all of the radiation absorption occurs at the surface. The error in the calculation of flow is largest for very shallow snowpacks, but this error is reduced by radiation absorption at the base of the snow and by the routing of meltwater through the saturated basal layer.
    Type of Medium: Series available for loan
    Pages: v, 9 Seiten , Illustrationen
    Series Statement: CRREL Report 76-11
    Language: English
    Note: CONTENTS Abstract Preface Summary Conversion factors for U.S. customary and SI units Introduction Theory Examples Discussion Literature cited
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  • 87
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-76/12
    In: CRREL Report, 76-12
    Description / Table of Contents: The heat transfer processes associated with melting and refreezing a drill hole 500 m in depth and 0.150 m in initial radius through an ice shelf were approximately analyzed. The results were expressed in graphical form showing the time available for experimentation under the hole as a function of heating duration and heating strength. It was found that the refreezing of the drill hole had a much slower rate than the melting of the hole.
    Type of Medium: Series available for loan
    Pages: vi, 15 Seiten , Illustrationen
    Series Statement: CRREL Report 76-12
    Language: English
    Note: Contents Abstract Preface Summary Nomenclature Introduction Analysis Melting period Freezing period Calculation Conclusion Literature cited Appendix A: Justification of using eq 8 for the calculation of heat transfer coefficient h
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  • 88
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-76/16
    In: CRREL Report, 76-16
    In: Mechanics of cutting and boring, (DE-B103)20210225152525
    Description / Table of Contents: This report, which is one of a series on the mechanics of cutting and boring in rock, deals with the kinematics of machines such as rotary drills, augers, tunnel boring machines, corers, and raise borers, in which the rotary cutting unit revolves about an axis that is parallel to the machine's direction of advance. The discussion and analysis cover the geometry and motion of various components of the cutting systems, including such topics as tool trajectories, tool speeds, motions of the more complicated mechanisms, chipping depth, penetration rates, production and clearance of cuttings, tool angles, and spatial distribution of cutters. Worked examples are given to illustrate the application of various equations to practical problems.
    Type of Medium: Series available for loan
    Pages: ix, 45 Seiten , Illustrationen
    Series Statement: CRREL Report 76-16
    Language: English
    Note: CONTENTS Abstract Preface Summary Foreword Terminology Trajectories of fixed tools Trajectories of roller cutters and indenters Speed of fixed cutting tools Speed of rolling disc cutters Speed and geometry of "wide" roller cutters Skidding rollers "Spiked" rollers Epicyclic or planetary mechanisms Chipping depth and penetration rate Chip production and cutting removal rate Balancing cutting and clearing rates in flight augers Tool relief angles - kinematic considerations Tool rake angles Distribution and spacing of cutting tools Radial tool spacing Angular tool spacing Spacing in the axial direction Literature cited
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  • 89
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-76/15
    In: CRREL Report, 76-15
    Description / Table of Contents: A literature review of revegetation and biological aspects of restoration research was completed for arctic and sub­arctic North America. Although there is a great deal of climatic variation in this region it is generally characterized by extreme conditions, such as a short growing season and permafrost. Most of the revegetation research has been undertaken in the last six years as a result of increased natural resource development. The primary goal has been erosion control, with aesthetics, minimization of thermokarst, and production of browse as other objectives. Revege­tation and long-term restoration methods depend upon such variables as the site conditions, nutrient regime (especially as this is influenced by the climatic conditions in the Arctic and Subarctic), plant adaptations, and the selection of native or introduced species. Technologies which have been developed to meet these conditions primarily include seedbed preparation, use of seed mixes, and fertilization and seeding methods. Most of the research has focused on the use of agronomic grasses and legumes. These are selected on the basis of a number of factors, such as cold hardiness and growth form prior to evaluation in the laboratory and the field. The most successful species to date have been Arctared fescue and Nugget bluegrass in the Arctic, while these two as well as creeping red fescue, meadow foxtail, Frontier reed canarygrass, Durar hard fescue, slender wheatgrass, and Icelandic poa did well in the Subarctic. Similar methods have been attempted to a more limited extent with evaluation of native herbaceous and woody species which seem promising on the basis of natural succession studies. There are a number of continuing research needs for arctic anc subarctic revegetation. These include fertilization strategies, development of specialized techniques (such as sprigging) for native species, and longer term studies. It is particularly important to integrate short term revegetatio methods with long-term restoration goals.
    Type of Medium: Series available for loan
    Pages: iv, 32 Seiten , Illustrationen
    Series Statement: CRREL Report 76-15
    Language: English
    Note: CONTENTS Page Abstract Preface Introduction Definition of revegetation Definition of restoration Objectives Some revegetation considerations Site conditions Nutrient regime Plant adaptations Native species vs introduced species Methods Seedbed preparation Seeding methods Timing of seeding Seed mixes Fertilization Agronomic grasses and legumes Selection criteria Laboratory evaluation Field evaluation Effect of revegetation methods Site conditions Maintenance of herbaceous cover Introduced woody species Native species — succession Significance of disturbance Primary succession Secondary succession Herbaceous native species Selection Laboratory evaluation Field evaluation Effect of revegetation methods Woody native species Selection Laboratory evaluation Field evaluation Native species and agronomic species, in combination Recommendations for research Summary Bibliography Appendix: Species tested
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  • 90
    Monograph available for loan
    Monograph available for loan
    Associated volumes
    Call number: ZSP-125-2002
    In: Antarctic Automatic Weather Station Data for the Calender Year ...
    Type of Medium: Monograph available for loan
    Pages: 48 S. ; graph. Darst.
    Language: English
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  • 91
    Call number: ZSP-405c-09-0003
    In: JAXA Research and Development Memorandum
    Type of Medium: Monograph available for loan
    Pages: 11 S. : Ill., graph. Darst.
    Series Statement: JAXA Research and Development Memorandum RM-06-015E
    Language: English
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  • 92
    Monograph available for loan
    Monograph available for loan
    Berlin [u.a.] : Springer-Verlag
    Call number: AWI S3-09-0016
    Type of Medium: Monograph available for loan
    Pages: 680 S.
    Edition: 3. ed.
    ISBN: 9783540252023
    Language: English
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  • 93
    Call number: ZSP-553-198,2
    In: Meddelelser om Grønland
    Type of Medium: Monograph available for loan
    Pages: 266 S.
    ISBN: 8717021200
    Series Statement: Meddelelser om Grønland 198,2
    Language: English
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  • 94
    Call number: ZSP-553-198,3
    In: Meddelelser om Grønland
    Type of Medium: Monograph available for loan
    Pages: 32 S. : Ill., Kt.
    ISBN: 8742101123
    Series Statement: Meddelelser om Grønland 198,3
    Language: English
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  • 95
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    Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung
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    Call number: ZSP-168-574
    In: Berichte zur Polar- und Meeresforschung
    Type of Medium: 12
    Pages: Online-Ressource (110 S.)
    Series Statement: Berichte zur Polar- und Meeresforschung 574
    Language: English
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  • 96
    facet.materialart.12
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    Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung
    Associated volumes
    Call number: ZSP-168-575
    In: Berichte zur Polar- und Meeresforschung
    Type of Medium: 12
    Pages: Online-Ressource (37 S.).
    Series Statement: Berichte zur Polar- und Meeresforschung 575
    Language: English
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  • 97
    Call number: ZSP-168-577
    In: Berichte zur Polar- und Meeresforschung
    Type of Medium: 12
    Pages: Online-Ressource (132 S.).
    Series Statement: Berichte zur Polar- und Meeresforschung 577
    Language: English
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  • 98
    Call number: ZSP-168-578
    In: Berichte zur Polar- und Meeresforschung
    Type of Medium: 12
    Pages: Online-Ressource (158 S.).
    Series Statement: Berichte zur Polar- und Meeresforschung 578
    Language: English
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  • 99
    facet.materialart.12
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    Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung
    Associated volumes
    Call number: ZSP-168-579
    In: Berichte zur Polar- und Meeresforschung
    Type of Medium: 12
    Pages: Online-Ressource (271 S.).
    Series Statement: Berichte zur Polar- und Meeresforschung 579
    Language: English
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  • 100
    facet.materialart.12
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    Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung
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    Call number: ZSP-168-558
    In: Berichte zur Polar- und Meeresforschung
    Type of Medium: 12
    Pages: 68 S. : Ill., graph. Darst. Kt.
    Series Statement: Berichte zur Polar- und Meeresforschung 558
    Language: English
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