ALBERT

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

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.

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.

Description / Table of Contents: This report first discusses the general approach for calculating the horizontal forces an ice cover exerts on a structure. Ice force determination consists of two parts: (1) the analysis of the in-plane forces assuming that the ice cover remains intact and (2) the use of a failure criterion, since an ice force cannot be larger than the force capable of breaking up the ice cover. For an estimate of the largest ice force, an elastic plate analysis and a failure criterion are often sufficient. A review of the literature revealed that, in the majority of the analyses, it is assumed that the failure load is directly related to a 'crushing strength' of the ice cover. However, observations in the field and tests in the laboratory show that in some instances the ice cover fails by buckling. This report reviews the ice force analyses based on the buckling failure mechanism and points out their shortcomings. The report then presents a new method of analysis which is based on the buckling mechanism

Description / Table of Contents: The analytical solution and the numerical study of the eigenvalue problem for determining the buckling pressure of an infinite elastic plate floating on water and stressed uniformly along the periphery of an internal hole is presented. The boundary conditions considered are the clamped-, simple-, and free-edge conditions. Small buckling pressure occurs only for the free-edge condition. The shape of the deflection for the free-edge condition suggests that buckling is an important mechanism of failure.

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.

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.

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.

Description / Table of Contents: The spectral reflectance of natural snow in the range of 0.20- to about 0.40-micrometers wavelengths was studied in the laboratory using both continuous spectral scanning and fixed bandpass measurements. White barium sulfate pressed powder was used as a standard for comparison. The reflectance of fresh snow was found to be very high (usually nearly 100%) and only weakly wavelength dependent from 0.24 micrometers to the visible range. In the 0.20- to 0.24-micrometers portion of the spectrum, the reflectance was found to be quite erratic. Possible reasons for the irregularities in reflectance measurements are discussed.

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.

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.

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.

Description / Table of Contents: Abstract: Models originally developed to describe the arching and the movement of granular materials through hoppers or chutes are applied to the arching and drift of pack ice in straits and gulfs having lengths of 50 to 500 km. Verification of the usefulness of the models is attempted by making comparisons with ice deformation patterns as observed via satellite imagery in the Bering Strait region and in Amundsen Gulf. The results are encouraging in that there is good correspondence between observed arching and lead patterns and those predicted by theory. In addition, values determined via the model for the angle of internal friction (≈ 30° to 35°) and the cohesive strength per unit thickness (≈ 2000 N/m) are similar to values obtained by other approaches. It is estimated that if the wind velocity parallel to the Bering Strait exceeds ≈ 6 m/s, there will be ice flow through the strait.

Description / Table of Contents: A brief discussion is given of the ways an icebreaker breaks ice. Since the icebreaking process is so complex, the solution of a mathematical model does not appear to be feasible. As an alternative, it is suggested that physical models be used to design icebreakers. The appropriate scaling laws for physical models are developed and their practical limitation discussed.

Description / Table of Contents: Uniaxial compression and tension tests were conducted on polycrystalline snow-ice to determine the effect of temperature on its strength. Test temperatures ranged from -O.1C to -54C. Two machine speeds, 0.847 mm/s and84.7 mm/s were used for the constant displacement rate tests. The compressive strength at -54C was about oneorder of magnitude higher than at -0.1C. The tensile strength at -18C was about 20% higher than at 0.1C. The initial tangent and 50% strength moduli are given for the compression tests, while the secant modulus to failure is given for the tension tests.The mode of fracture is discussed and the test results are compared with data from other investigations.

Description / Table of Contents: Ice fog suppression experiments on the Fort Wainwright Power Plant cooling pond were conducted during the winters of 1974-76. Baseline information studies occupied a sizable portion of the available ice fog weather in 1974-75. Then hexadecanol was added to the pond and dramatically improved visibility by reducing fog generated from water vapor released by the pond at -14 C. Although this temperature was not low enough to create ice fog, the cold vapor fog created was equally as devastating to visibility in the vicinity of the pond. During the winter of 1975-76, suppression tests were continued using films of hexadecanol, mixes of hexadecanol and octadecanol, and ethylene glycol monobutyl ether (EGME). Suppression effectiveness at colder temperatures was stuided and limits to the techniques were probed. A reinforcing grid was constructed that prevented breakup of the film by wind and water currents. Lifetime tests indicated that EGME degrades much more slowly than either hexadecanol or the hexadecanol-octadecanol mix. The films were found to be very effective fog reducers at warmer temperatures but still allowed 20% to 40% of normal evaporation to occur. The vapor thus produced was sufficient to create some ice fog at lower temperatures, but this ice fog occurred less frequently and was more quickly dispersed than the thick fog that was present before application of the films.

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.

Description / Table of Contents: A broadbanded impulse radar system was used for aerial detection of accumulated frazil and brash ice in a 9.5-km reach of the St. Lawrence River near Ogden Island. The remote sensing and data reduction system developed for the project provided data sufficient for production of a contour map having 1-ft intervals. With this contour map, the accumulation pattern of frazil and brash ice could be analyzed. Recommendations are given for improving the performance of the aerial profiling system.

Description / Table of Contents: This report presents experimental results on the conditions of initiation of an ice jam by a simple surface obstruction, on the equilibrium thickness of an ice jam formed by accumulation and submergence of ice floes, and on the compression strength of floating, fragmented ice cover. In the study on ice jam initiation, it was found that the minimum concentration of floes in the opening of the obstruction at which a jam occurs is nearly independent of the ratio of width of constricted passage to channel width, and is proportional to a negative power of the ratio of floe length to width of constricted passage. From energy analysis of floe submergence, a relationship relating the thickness of a jam formed by accumulation and submergence of floes to the approach flow characteristics was derived and found to fit satisfactorily the experimental data. In experiments on compression strength of floating, fragmented ice cover it was found that the compressive strength is inversely proportional to compression velocity and independent of cover length.

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.

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.

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.

Description / Table of Contents: A literature search was made for information on the accretion of ice on ocean structures and on methods for control. The bulk of the reports were in Russian, with some additional Japanese, British, American, Canadian, and Icelandic sources. Analysis of icing reports indicated that sea spray is the most important cause of ship icing, with lesser amounts due to freezing rain, snow, and fog. Icing is a potential danger whenever air temperatures are below the freezing point of water and the sea temperature is 6 C or lower. Theoretical work on the ice accretion process is discussed, and a method is suggested, based on Russian experiments, for calculating the sea spray accumulation rate for cylindrical and flat surfaces as a function of water source temperature, air temperature, and wind speed. Other factors that influence icing severity are ship size and configuration, angle between ship course and water heading, and ship speed. Icing in the north temperate latitudes generally occurs in the rear of barometric depressions. Maps showing limits of various degrees of icing severity are included. Atmospheric icing measurements on tall land-based structures are presented, and potential maximum accumulations estimated. Control measures are discussed, though no completely effective method is available. Mechanical (impaction) methods are the most common, but experiments have been conducted on heated, icephobic, and deformable surfaces, and with freezing point depressants. No device for the unequivocal measurement of ice accumulation is available, though some experimental methods are suitable for controlled testing; it is recommended that a device be developed.

Description / Table of Contents: A computer program to calculate the increased live load on a snow-covered roof due to rain-on-snow is given. For the 25-year rainstorm falling on a heavy snow load on a flat roof in Hanover, New Hamsphire, and additional 98 kg/m2 (20 lb/ft2) of liquid water is added to the live load. The additional load due to rain-on-snow is very sensitive to the snow properties and characteristics of the roof. A wide range of live loads is possible, depending on the particular circumstances.

Description / Table of Contents: The breakup of the Chena River was observed and documented during the spring of 1975 and 1976. This study attempted to determine the potential for damage to the proposed Chena River flood control dam from ice and debris during breakup. Results of this study were compared to those of a 1974 companion study. In 1975, ice thickness were determined to be 15% thinner than in 1974 and ice volume was 33% smaller. No major ice floes were observed in 1975 and no significant flooding occurred, although the approaches to a bridge at the damsite were eroded by debris and high water immediately after breakup. The 1976 breakup was milder than that of 1975. Minor flooding in the lower river was caused by jamming of a few large ice pieces, but no property damage resulted.

Description / Table of Contents: A laboratory experimental study was conducted on a scale model of an annular flow ice-water heat sink to be used to store the waste heat produced in a hardened defense installation operating in an isolated mode. The study ex­amined: 1) scaling relationships for predicting the performance of prototype units using data from scale models, 2) the accuracy of a computer prediction technique developed during an earlier study, 3) the heat transfer phenom­enon at the ice-water interface, and 4) some practical aspects related to the operation of a prototype installation. The scaling relationships and the computer program were found to be sufficiently accurate for use in developing a proto­type sink design. During operation the scale model sink provided an almost constant low temperature source of coolant water for approximately one-half its useful life and thereafter behaved like an ordinary stored water reservoir type heat sink. No significant operational problems were discovered.

Description / Table of Contents: Two performance indicators, effectiveness and thermal efficiency, are defined and used to evaluate the year-round performance of three protected membrane roofs in Alaska and New Hampshire. Effectiveness is a measure of the deviations of ceiling temperatures from a yearly average, with large diviations indicating erratic performance in the roofing-insulation system and small departures indicating a thermally stable system. Thermal efficiency, the ratio of calculated heat loss to measured heat loss, is affected by climatic conditions such as rain, snow, solar radiation and wind. Thermal efficiency values of 100% or greater are possible since the calculated heat loss is based only on the inside and outside air temperature differences and the thermal properties of the roof components. Results of the year-round evaluation indicate that the three protected membrane roofs generally have high values of both effectiveness and thermal efficiency.

Description / Table of Contents: Abstract: The amount of force that an ice sheet can apply to a vertical pile was tested by lowering a hydraulic ram device into a hole cut in an existing ice sheet. The device had a large base and shoved a relatively narrow vertical pile in a horizontal direction. Test variables were: pile widths - 1.5 in. to 36.7 in.; pile shapes - flat, round, 45 ° and 90° wedges; ice thickness - 2.6 in. to 8.8 in.; and ram speed - 0.07 in./sec to 18.75 in./sec; but not all shapes and sizes were tested at all speeds. Air temperature was 20 ° F (-6.7 ° C). Forces and displacements were measured electronically. The findings are presented as a table of test results and as bar graphs of the resultant ice pressures versus the pile width-to-ice-thickness ratio, pile width and shape combination and pile velocity. The types of failures in the ice sheet were classified as crushing, splitting, buckling, bending, and creeping. The ice sheet generally withstood a high initial load followed by several lower peak load levels. The maximum ice pressure measured was 610 psi for a 12.6-in.-diam round pile in 8.4-in.-thick ice.

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.

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.

Description / Table of Contents: The viscoelastic deflection of an infinite floating ice plate subjected to a circular load was solved, assuming the Maxwell-Voigt type four-element model. An effective method of numerical integration of the solution integrals was developed, of which each integrand contains a product of Bessel functions extending to infinity. The theoretical curve was fitted to the field data, but the material constants thus found varied with time and location.

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.

Description / Table of Contents: The results of axial double point-load tests on disk samples of snow and ice obtained from the area of McMurdo Sound, Antarctica, are presented. They show the effects of temperature, sample length, load point diameter and specific gravity on failure load. It was determined that 13 samples should be tested to obtain a representative mean strength index. The results show that the axial double point-load test has good possibilities as a rapid field test for determining the unconfined comrpessive strength of snow and ice but that further evaluation of the variables affecting test results must be made.

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.

Description / Table of Contents: The report deals with the cutting of rock and similar materials by parallel motion tools. It examines cutting forces and energy requirements, taking into consideration tool geometry, wear, operating conditions, and material properties. After an introductory discussion of terminology, some general principles are outlined, and relevant theoretical ideas on metal cutting and rock cutting are reviewed. The next section, which is the heart of the report, reviews experimental data on the magnitudes and directions of cutting forces. There is a graphical compilation of data, including some from obscure or unpublished sources. The variables covered include chipping depth, rake angle, relief angle, side rake, base angle, tool width, tool compliance, tool speed, tool wear, tool interactions, and material properties. The second major part of the report treats the energetics of cutting. It begins with a short discussion of relevant principles, and continues with a compilation and review of experimental data, covering the same independent variables as the force section. The report ends with a concise summary of general behavior for parallel motion tools.

Description / Table of Contents: Mit der Dynamik von Wind und Wellen, mit dem Haushalt von Wärme und Wasser befasst sich die theoretische Meteorologie. Viele Studierende haben eine Scheu vor dem Fach, weil sie die Mathematik fürchten. Aber jeder, der sich für Meteorologie und Wetter interessiert, weiß im Grunde: ohne Mathematik (und ein bisschen theoretische Physik) geht es nicht. Etliche Formeln muss man sich merken, und man muss mit ihnen arbeiten können. Michael Hantel führt interessierte LeserInnen hin zu den eigentlichen Begriffen, die hinter den Formeln stehen. Diese Begriffswelt in neuer Frische darzustellen ist sein Anliegen. Statt Übungsaufgaben bietet der Autor vorgerechnete Abschätzungen, die das Verstehen des Faches erleichtern. Das Buch ist gegliedert in die Abschnitte Strahlung, Thermodynamik, Hydrodynamik, barotrope Prozesse, Grenzschicht, barokline Prozesse und globale Haushalte. Es bietet ein Gesamtbild der theoretischen Meteorologie auf dem Niveau des Bachelor-Studienganges, und es kann auch als Grundlage für eine vertiefte Beschäftigung mit der Atmosphäre und dem Klima dienen.

Description / Table of Contents: Contents: Indigenous peoples and biodiversity in the Arctic. - 1 Synthesis: Implications for Conservation. - 2 Species Diversity in the Arctic. - 3 Mammals. - 4 Birds. - 5 Amphibians and Reptiles. - 6 Fishes. - 7 Terrestrial and Freshwater Invertebrates. - 8 Marine Invertebrates. - 9 Plants. - 10 Fungi. - 11 Microorganisms. - 12 Terrestrial Ecosystems. - 13 Freshwater Ecosystems. - 14 Marine Ecosystems. - 15 Parasites. - 16 Invasive Species: Human-Induced. - 17 Genetics. - 18 Provisioning and Cultural Services. - 19 Disturbance, Feedbacks and Conservations. - 20 Linguistic Diversity.

Description / Table of Contents: The eyes of the world are turning northwards. In recent years, interest in the Arctic has increased dramatically within and outside of Arctic countries. This is reflected in the amount of attention given to Arctic biodiversity. While the landscapes and wildlife have been the subject of explorers, scientists, artists and photographers as well as the home of a variety of peoples for a long time, until recently Arctic biodiversity did not feature very prominently in national or international policy work. This, however, is changing, as the unique values of Arctic nature are increasingly discussed at high levels. At the same time, more and more attention has been paid to the interface between science and policy to ensure that policy is built on the best science available. Biodiversity is life. It is the very foundation of our existence on Earth. In the Arctic, links between biodiversity and traditional ways of life are often seen more clearly than in many other parts of the world. These are examples of ecosystem services, the benefits that we receive from nature. Many ecosystems and ecosystem functions in the Arctic remain largely unstudied and involve little-known organisms, especially microbes. The Arctic Biodiversity Assessment presents current knowledge also on these processes and organisms and thus provides a base for further work.

Description / Table of Contents: Contents: Council Staff . - Acknowledgments. - Boxes. - Tables. - Figures. - Acronyms and Abbreviations. - Summary. - Introduction. - 1 The Oceans in the Anthropocene. - 1.1 Use of the oceans. - 1.1.1 The legendary sea and its cultural meanings. - 1.1.2 Food from the sea. - 1.1.3 Ocean shipping and maritime trade. - 1.1.4 The sea as a dump for waste and waste water. - 1.1.5 Energy from the sea. - 1.1.6 Marine mining and resource extraction. - 1.1.7 The economic value of marine ecosystems. - 1.2 Threats to the oceans. - 1.2.1 Physical destruction of ecosystems. - 1.2.2 Overfishing. - 1.2.3 Impacts of marine pollution. - 1.2.3.1 Results of chemical pollution. - 1.2.3.2 Results of plastic pollution. - 1.2.3.3 Radioactive contamination. - 1.2.4 Warming. - 1.2.5 CO2 input and acidification. - 1.2.6 Low-oxygen zones. - 1.2.7 Sea-level rise. - 1.2.8 Aggregated effects. - 1.3 Possible new uses. - 1.3.1 Renewable energy. - 1.3.2 Raw materials. - 1.3.3 Marine genetic resources. - 1.3.4 New developments in marine aquaculture. - 1.4 Shaping the future of the marine ecosystem. - 1.4.1 Primary principles and values. - 1.4.2 Guiding principle for human interaction with the oceans. - 1.4.2.1 Think systemically: Regard and maintain the sea as an ecosystem and aspart of the Earth system. - 1.4.2.2 Act in a precautionary way: Take uncertainty and ignorance into account. - 1.4.2.3 Cooperate: overcoming the tragedy of the commons. - 1.4.3 Exemplary specification of the guiding principle for the sustainable stewardship of the marine ecosystem. - 2 Global Society and Social Contract. - 2.1 Global society and world's oceans. - 2.1.1 The global society in the Anthropocene. - 2.1.2 The emerging global society and global society theory. - 2.1.3 The cosmopolitan challenge. - 2.1.4 Global appreciation of the oceans. - 2.2 A social contract for the seas. - 2.2.1 A social contract as a basis for the Great Transformation. - 2.2.2 Reform of ocean governance. - 3 Governance of Human Ocean Use. - 3.1 Specifics of the seas. - 3.1.1 Oceans as part of the Earth system. - 3.1.2 Demands on marine policy caused by knowledge gaps. - 3.1.3 Oceans as a global public and common good. - 3.1.4 Touchstones for assessing the existing governanceof the oceans. - 3.1.5 Common heritage of mankind. - 3.2 Ocean governance in international law: UNCLOS. - 3.2.1 Zoning of the oceans by UNCLOS. - 3.2.1.1 Territorial sea. - 3.2.1.2 Contiguous zone. - 3.2.1.3 Exclusive economic zone. - 3.2.1.4 Continental shelf. - 3.2.1.5 High seas. - 3.2.1.6 The Area. - 3.2.2 Regulations of UNCLOS on the conservation and sustainable use of the oceans. - 3.2.3 Institutions of UNCLOS. - 3.2.3.1 International Tribunal for the Law of the Sea. - 3.2.3.2 International Seabed Authority and the seabed regime. - 3.2.4 Assessment of UNCLOS. - 3.2.4.1 Systemic perspective. - 3.2.4.2 Precautionary principle. - 3.2.4.3 Adaptive management. - 3.2.4.4 Incentives for innovation. - 3.2.4.5 Assignment of rights of use. - 3.2.4.6 Cooperation. - 3.2.4.7 Subsidiary decision-making structures. - 3.2.4.8 Transparent information. - 3.2.4.9 Participative decision-making structures. - 3.2.4.10 Fair distribution mechanisms. - 3.2.4.11 Conflict-resolution mechanisms. - 3.2.4.12 Enforcement mechanisms. - 3.2.5 Core problems and challenges of future ocean governance. - 3.3 Global ocean governance: UN institutions and activities. - 3.3.1 Actors: UN bodies and specialized organizations. - 3.3.1.1 UN General Assembly and UNSecretary-General. - 23.3.1.2 Rio Process. - 3.3.1.3 International Maritime Organization. - 3.3.1.4 UNESCO Intergovernmental Oceanic Commission. - 3.3.1.5 UN Environmental Programme (UNEP). - 3.3.1.6 UN-Oceans. - 3.3.1.7 Global Environment Facility (GEF). - 3.3.1.8 World Bank Group. - 3.3.2 UN conventions relating to the oceans. - 3.3.2.1 Convention on Biological Diversity (CBD). - 3.3.2.2 Negotiations on a new implementing agreement on marine biodiversityon the high seas. - 3.3.2.3 UN Framework Convention on Climate Change (UNFCCC). - 3.3.2.4 UNESCO World Heritage Convention and World Heritage Marine Programme. - 3.3.2.5 MARPOL and SOLAS. - 3.3.2.6 London Convention and London Protocol. - 3.4 Regional ocean governance. - 3.4.1 UNEP Regional Seas Programme. - 3.4.2 Regional seas agreements. - 3.4.2.1 Task areas. - 3.4.2.2 Institutionalization: governance mechanisms and capacity. - 3.4.2.3 Cooperation, coordination, coherence and complementarity. - 3.4.3 EU marine policy. - 3.5 Private ocean governance. - 3.5.1 Options and limitations. - 3.5.2 Example: eco-labels and sustainability labels. - 3.6 Selected instruments. - 3.6.1 Environmental monitoring. - 3.6.2 Marine protected areas and marine spatial planning. - 3.6.2.1 Marine protected areas. - 3.6.2.2 Marine spatial planning. - 3.6.3 Integrated coastal-zone management.. - 3.6.4 Environmental standards. - 3.6.5 Environmental liability. - 3.6.6 Sanctions. - 3.6.7 Class actions. - 3.6.8 International financial transfers. - 3.7 Conclusions. - 4 Food from the Sea. - 4.1 Marine fishery. - 4.1.1 Status and trends of fisheries. - 4.1.2 Importance and effects of fisheries. - 4.1.2.1 Food and food security. - 4.1.2.2 Socioeconomic significance and effects. - 4.1.2.3 Ecological significance and effects. - 4.1.2.4 Small-scale marine fisheries in the global context. - 4.1.3 Sustainable fisheries management: methods and instruments. - 4.1.3.1 Ecosystem approach and precautionary principle as the basis for sustainable fishing. - 4.1.3.2 Knowledge-based fisheries management. - 4.1.3.3 Instruments for the sustainable management of fish-stocks. - 4.1.3.4 Minimizing the ecological risks and side effects of fisheries. - 4.1.3.5 Monitoring and enforcement. - 4.1.3.6 Costs and financing the transition towards sustainable fisheries. - 4.1.4 International fisheries governance: institutions and focal points. - 4.1.4.1 Political objectives. - 4.1.4.2 The Food and Agriculture Organization of the United Nations. - 4.1.4.3 The FAO Code of Conduct for Responsible Fisheries. - 4.1.4.4 Fisheries governance on the high seas: the UN Fish Stocks Agreement and regional fisheries management organizations. - 4.1.4.5 Illegal, unreported and unregulated fishing. - 4.1.4.6 The external dimension of the EU Common Fisheries Policy. - 4.1.4.7 Subsidies in the fishing industry. - 4.1.4.8 International trade and trade policy. - 4.2 Aquaculture. - 4.2.1 Definitions and principles. - 4.2.2 State of aquaculture and trends. - 4.2.2.1 Growth and regional overview. - 4.2.2.2 Contribution to food security and poverty reduction. - 4.2.2.3 Environmental risks from aquaculture and conflicts over use at the coasts. - 4.2.2.4 Promoting ecologically sustainable aquaculture. - 4.2.3 Governance of aquaculture. - 4.2.3.1 Fundamental prerequisites for a sustainable form of aquaculture. - 4.2.3.2 Selected instruments for promoting sustainable aquaculture. - 4.2.3.3 Research and development for sustainable aquaculture. - 4.2.4 International and regional governance in aquaculture. - 4.2.4.1 International level. - 4.2.4.2 European Union. - 4.2.4.3 Regional seas agreements. - 4.3 Interactions between fisheries and aquaculture. - 4.3.1 Forage fisheries and breeding from wild-caught fish. - 4.3.2 Competition between uses. - 4.3.3 Reducing the proportion of fishmeal and fish oil used in aquaculture feeds. - 4.4 Systemic effects: land/sea interactions and feedbackloops with the Earth system. - 4.4.1 Climate change. - 4.4.2 Acidification. - 4.4.3 Low-oxygen zones and eutrophication. - 4.4.4 Anthropogenic pollution. - 4.4.5 Synergistic effects. - 4.5 Conclusions. - 5 Energy from the sea. - 5.1 Fossil energy carriers from the sea. - 5.1.1 Resource availability of fossil energy carriers. - 5.1.2 Technologies of offshore extraction. - 5.1.3 Environmental impact of fossil energy use. - 5.1.4 Infrastructure. - 5.1.4.1 Mineral oil. - 5.1.4.2 Natural gas. - 5.1.4.3 Carbon dioxide. - 5.1.5 Costs. - 5.1.6 Prospects of fossil-fuel extraction in the oceans. - 5.1.7 Conclusions. - 5.2 Renewable energy. - 5.2.1 Technological possibilities of offshore wind energy and marine energies. - 5.2.1.1 Development status of offshore wind energy. - 5.2.1.2 Development status of marine-energy technologies. - 5.2.2 Global potential of sea-based renewable power generation. - 5.2.2.1 Offshore wind energy. - 5.2.2.2 Marine energies. - 5.2.3 Environmental impact of marine renewable-energy generation. - 5.2.4 Infrastructure. - 5.2.4.1 Offshore logistics for renewable energy. - 5.2.4.2 Offshore storage technologies. - 5.2.5 Costs. - 5.2.5.1 Offshore wind energy. - 5.2.5.2 Marine energies. - 5.3 Vision of a future marine energy system. - 5.3.1 The status quo of marine energy generation. - 5.3.2 A future renewable marine energy system. - 5.3.3 Transformation of the marine energy system - from the status quo to the futureenergy system. - 5.4 Governance. - 5.4.1 Energy policy. - 5.4.2 Marine policy. - 5.4.2.1 Marine spatial planning. - 5.4.2.2 Construction of installations in the sea. - 5.4.2.3 Regulation of oil and gas production. - 5.4.2.4 Regulations on the storage of CO2 in the sea or the seabed. - 5.4.3 Promotion of innovation. - 5.4.3.1 Promotion of systemic innovation. - 5.4.3.2 Technology development. - 5.4.3.3 Innovation potential. - 5.4.3.4 Measures. - 5.5 Conclusions. - 6 Synthesis: The Blue Revolution. - 6.1 The oceans as the common heritage of mankind. - 6.2 Expansion into the oceans. - 6.3 A new initiative for the conservation and sustainable use of the seas. - 6.4 Elements of a new marine policy. - 7 Recommendations for Action. - 7.1 Guiding principles for future ocean governance. - 7.1.1 The oceans as the 'common heritage of mankind'. - 7.1.2 The systemic approach. - 7.1.3 The precautionary principle. - 7.1.4 Ten criteria for a future system of ocean governance. - 7.1.5 Implementation and enforcement. - 7.1.6 A social contract for the seas. - 7.2 The WBGU's vision of a comprehensive reform of the international law of the sea. - 7.2.1 The common heritage of mankind, the systemic approach and the precautionaryprinciple: three guiding principles for ocean management. - 7.2.2 Institutional changes. - 7.2.2.1 A global steward of the seas: the World Oceans Organization. - 7.2.2.2 Regional stewards of the seas: Regional Marine Management Organizations. - 7.2.2.3 Extend the jurisdiction of the International Tribunal for the Law of the Sea. - 7.2.3 Rights and duties of states parties on the high seas and in EEZs. - 7.2.3.1 Conservation and sustainable use of the high seas. - 7.2.3.2 Conservation and sustainable use of the Exclusive Economic Zones. - 7.2.4 Instruments. - 7.3 Recommendations for action: the road to a comprehensivereform of the law of the sea. - 7.3.1 Strengthen the knowledge and action base of ocean governance. - 7.3.1.1 Improve marine environmental monitoring. - 7.3.1.2 Process scientific knowledge for policy-makers and support the Regular Process. - 7.3.1.3 Set up a multi-stakeholder forum. - 7.3.2 Create the necessary conditions for sustainable management. - 7.3.3 Develop strategies for future ocean governance. - 7.3.3.1 Develop the Oceans Compact into an Integrated World Oceans Strategy. - 7.3.3.2 Ratify regional, national and local marine strategies. - 7.3.3.3 Take on a pioneering role - forge subglobal alliances. - 7.3.4 Support and flesh out the international law of the sea. - 7.3.4.1 Promote the signing, ratification and implementation of UNCLOS. - 7.3.4.2 Reach a new implementing agreement on biological diversity on the high seas. - 7.3.4.3 Advance the UN Fish Stocks Agreement and Regional Fisheries Management Organizations (RFMOs). - 7.3.5 Strengthen regional ocean governance. - 7.3.5.1 Strengthen and expand the UNEP Regional Seas Programme. - 7.3.5.2 Strengthen regional seas agreements. - 7.3.5.3 Improve dovetailing in regional ocean governance. - 7.3.6 Develop concepts for the joint funding of ocean governance. - 7.3.6.1 Strengthen international financing mechanisms. - 7.3.6.2 Use the mechanisms of the Framework Convention on Climate Change for funding. - 7.3.6.3 Utilize user charges as a source of funding. - 7.3.7 Employ incentive instruments and funding structures. - 7.3.7.1 Create economic incentives for sustainable uses. - 7.3.7.2 Develop funding structures for long-term-oriented investments. - 7.3.8 Strengthen and expand private governance. - 7.3.8.1 Introduce a standardized Europe-wide system of certification for wild-caught fish and seafood. - 7.3.8.2 Improve legal certainty on the WTO-conformity of sustainability standards. - 7.3.9 Considerably expand marine protected areas and spatial planning. - 7.3.9.1 Expand marine protected areas. - 7.3.9.2 Expand cross-border marine spatial planning. - 7.3.10 Promote the harmonization of existing liability regimes. - 7.4 Food from the sea. - 7.4.1 Recommendations for action on marine fisheries. - 7.4.1.1 Overall recommendations for a change of course in fisheries. - 7.4.1.2 Improve the preconditions for knowledge-based fishery. - 7.4.1.3 Reduce subsidies. - 7.4.1.4 Stop wastefulness. - 7.4.1.5 Combat illegal, unreported and unregulated fishing. - 7.4.1.6 Take into account climate change, ocean acidification and other systemic effects. - 7.4.1.7 Reform the European Union's Common Fisheries Policy. - 7.4.1.8 Marine small-scale fisheries in the global context. - 7.4.2 Recommendations for action on aquaculture. - 7.4.2.1 Improve knowledge and data resources. - 7.4.2.2 Promote the development of sustainable aquaculture systems. - 7.4.2.3 Implement international and EU-wide recommendations. - 7.4.2.4 Strengthen economic policy supporting sustainable aquaculture. - 7.4.2.5 Promote cooperation, prevent conflicts. - 7.4.3 Fishing and aquaculture as elements of integrated strategies for food security. - 7.5 Use of energy from the sea for the energy-system transformation. - 7.5.1 Integrated energy, marine and innovation policiesfor the energy-system transformation. - 7.5.1.1 Energy policy. - 7.5.1.2 Marine policy. - 7.5.1.3 Innovation policy. - 7.5.2 Build an offshore supergrid. - 7.5.3 Refrain from marine methane hydrate mining. - 7.5.4 Develop regulations for sub-seabed CCS. - 8 Recommendations for Research and Education. - 8.1 Research in the context of the transformation towards sustainability. - 8.1.1 Key types of research. - 8.1.2 Innovative approaches in German marine research. - 8.2 Transformation research for the oceans. - 8.2.1 Conceptual background. - 8.2.2 Research recommendations. - 8.3 Transformative research for the seas. - 8.3.1 Research on global change. - 8.3.2 Ocean governance. - 8.3.2.1 Ocean governance for the transformation towards sustainability. - 8.3.2.2 Policy instruments for new challenges. - 8.3.3 Food from the sea. - 8.3.3.1 Fisheries. - 8.3.3.2 Aquaculture. - 8.3.3.3 Overarching issues. - 8.3.4 Energy from the sea. - 8.3.4.1 Technology research. - 8.3.4.2 Research on environmental hazards and risks. - 8.4 Recommendations on research policy. - 8.4.1 Stronger integration of interdisciplinary marine research into research programmes. - 8.4.2 Stronger institutionalization of interdisciplinary marine research. - 8.4.3 Strengthening of the interface between science and society in marine research. - 9 References. - 10 Glossary.

Description / Table of Contents: Inhaltsverzeichnis: Mitarbeiter des Beirats. - Danksagung. - Kästen. - Tabellen. - Abbildungen. - Akronyme. - Zusammenfassung. - Einleitung. - 1 Die Meere im Anthropozän. - 1.1 Nutzung der Meere. - 1.2 Die Bedrohung der Meere. - 1.3 Mögliche neue Nutzungen. - 1.4 Die Zukunft des Ökosystems Meer gestalten. - 2 Weltgesellschaft und Gesellschaftsvertrag. - 2.1 Weltgesellschaft und Weltmeere. - 2.2 Ein Gesellschaftsvertrag für die Meere. - 3 Governance anthropogener Meeresnutzung. - 3.1 Spezifika der Meere. - 3.2 Völkerrechtlicher Rahmen der Meeres-Governance: UNCLOS. - 3.3 Globale Meeres-Governance: UN-Institutionen und Aktivitäten. - 3.4 Regionale Governance der Meere. - 3.5 Private Governance der Meere. - 3.6 Ausgewählte Instrumente. - 3.7 Folgerungen. - 4 Nahrung aus dem Meer. - 4.1 Marine Fischerei. - 4.2 Aquakultur. - 4.3 Wechselwirkungen zwischen Fischerei und Aquakultur. - 4.4 Systemische Wirkungen: Land/Meer-Interaktionen und Rückkopplungen mit dem Erdsystem. - 4.5 Folgerungen. - 5 Energie aus dem Meer. - 5.1 Fossile Energieträger aus dem Meer. - 5.2Erneuerbare Energien. - 5.3 Vision für ein marines Energiesystem der Zukunft. - 5.4 Governance. - 5.5 Folgerungen. - 6 Synthese: Die blaue Revolution. - 6.1 Die Meere als gemeinsames Erbe der Menschheit. - 6.2 Expansion in die Meere. - 6.3 Eine neue Initiative für den Schutz und die nachhaltige Nutzung der Meere. - 6.4 Elemente einer neuen Meerespolitik. - 7 Handlungsempfehlungen. - 7.1 Handlungsleitende Prinzipien einer künftigen Meeres-Governance. - 7.2 Die WBGU-Vision einer umfassenden Reform des internationalen Seerechts. - 7.3 Handlungsempfehlungen: Der Weg zu einer umfassenden Seerechtsreform. - 7.4 Nahrung aus dem Meer. - 7.5 Energienutzung aus dem Meer für die Energiesystemtransformation. - 8 Empfehlungen für Forschung und Bildung. - 8.1 Forschung im Kontext der Transformation zur Nachhaltigkeit. - 8.2 Transformationsforschung für die Meere. - 8.3 Transformative Forschung für die Meere. - 8.4 Empfehlungen zur Forschungspolitik. - 9 Literatur. - 10 Glossar.