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Wave Ice Interaction Model Experiments
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Book Synopsis Wave-ice Interaction Model Experiments by : Charles J. Henry
Download or read book Wave-ice Interaction Model Experiments written by Charles J. Henry and published by . This book was released on 1968 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurements of amplitude and bottom pressure were made over a range of free-surface wave lengths incident upon simulated floes of varying solidity and size. The results show that the predominant dissipating mechanism in this model scale was a linear viscous decay both with and without the ice floes. The ratio of bottom pressure to local wave amplitude in the ice field was found to be the same as that of a free-surface wave with no ice present. The measured wave lengths and celerity with and without ice agree very well with the predicted values for finite depth of water with no ice. (Author).
Book Synopsis Wave-ice Interaction by : David V. Evans
Download or read book Wave-ice Interaction written by David V. Evans and published by . This book was released on 1968 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: Three models are examined to study the transmission of ocean waves through an ice-field. In each case the effect of ice thickness, water depth, and the wave-length and angle of incidence of the incoming ocean wave is considered. In Model 1 the ice is assumed to consist of floating non-interacting mass elements of varying thickness and the shallow-water approximation is utilized to simplify the equations. A simple cosine distribution varying in one direction only is assumed. In Model 11 the mass elements of constant thickness, interact through a bending stiffness force so that the ice acts as a thin elastic plate. The mass elements are connected through a surface tension force in Model 111 so that the ice is simulated by a stretched membrane. In both Models 11 and 111 the full linearized equations are solved. Because of the complexity of the resulting analysis, calculations of the reflection and transmission coefficients, and the pressure under the ice, are made in Model 11 on the basis of the shallow water approximation. (Author).
Book Synopsis An Experimental Study of Wave-ice Interaction and Floe Flexure in the Pack Ice of the Labrador Current by : Peter Wadhams
Download or read book An Experimental Study of Wave-ice Interaction and Floe Flexure in the Pack Ice of the Labrador Current written by Peter Wadhams and published by . This book was released on 1984 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Role of Ice Properties in Wave-ice Interaction During LIMEX, 1987 by :
Download or read book Role of Ice Properties in Wave-ice Interaction During LIMEX, 1987 written by and published by . This book was released on 1989 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Labrador ice margin experiment (LIMEX) was initiated as a pilot program in March 1987. An interdisciplinary group of research organizations gathered data from the marginal ice zone (MIZ) and in the open water adjacent to the ice edge. This paper presents results of the 1987 pilot program. The ocean data gathering program spectral ocean wave model was used to hindcast wind and wave fields for the duration of the experiment. In addition, the C-CORE/MUN ice motion package (6 degrees of freedom) was placed on several ice floes to measure the wave induced ice motion at different locations along the MIZ. Analysis of the motion package records furnished time series plots of wave parameters as well as wave spectra within the ice cover. Interpretation of the aerial photographs provided measurements for floe size distribution, floe density and ice concentration.
Book Synopsis Experimental Investigation of Ice Floe Under Wave Action by : NATIONAL ENGINEERING SCIENCE CO PASADENA CA.
Download or read book Experimental Investigation of Ice Floe Under Wave Action written by NATIONAL ENGINEERING SCIENCE CO PASADENA CA. and published by . This book was released on 1965 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Report of experimental results on the interaction behavior of floating ice sheets with infinitely deep water gravity waves using model similitude theory. The results indicate a considerable dampening effect on the water wave by the ice sheet. A comparison of experiment results with a mathematical model developed for ice floe behavior indicate a fairly good qualitative agreement but the reaction of the experiment model was below that predicted by the mathematical model. (Author).
Book Synopsis Wind Waves in Sea Ice of the Western Arctic and a Global Coupled Wave-ice Model by : Vincent T. Cooper
Download or read book Wind Waves in Sea Ice of the Western Arctic and a Global Coupled Wave-ice Model written by Vincent T. Cooper and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The retreat of Arctic sea ice is enabling increased ocean wave activity at the ice edge, yet the interactions between surface waves and sea ice are not fully understood. Here, we examine in situ observations of wave spectra spanning 2012-2021 in the western Arctic marginal ice zone (MIZ). Swell waves are rarely observed beyond 100 km inside the MIZ. However, local wind waves are observed forming in patches of open water amid partial ice cover during summer. These local waves remain fetch-limited between ice floes with heights less than 1 m. To investigate the physics of these waves, we conduct experiments varying wave attenuation and generation in ice in a global model with coupled interactions between waves and sea ice. A weak high-frequency attenuation rate is required to simulate the wind waves reported in observations. The choice of attenuation scheme and the wind input in ice have a remarkable impact on the extent of wave activity in sea ice across polar oceans, particularly in the Southern Hemisphere. As well as demonstrating the need for stronger constraints on wave attenuation, our results suggest further attention should be paid to locally generated wind waves and their role in sea ice evolution.
Book Synopsis Mathematical Techniques for Wave Interaction with Flexible Structures by : Trilochan Sahoo
Download or read book Mathematical Techniques for Wave Interaction with Flexible Structures written by Trilochan Sahoo and published by CRC Press. This book was released on 2012-10-24 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical Techniques for Wave Interaction with Flexible Structures is a thoughtful compilation of the various mathematical techniques used to deal with wave structure interaction problems. The book emphasizes unique determination of the solution for a class of physical problems associated with Laplace- or Helmholtz-type equations satisfying higher order boundary conditions with the applications of the theory of ordinary and partial differential equations, Fourier analysis, and more. Features: Provides a focused mathematical treatment for gravity wave interaction with floating and submerged flexible structures Highlights solution methods for a special class of boundary value problems in wave structure interaction Introduces and expands upon differential equations and the fundamentals of wave structure interaction problems This is an ideal handbook for naval architects, ocean engineers, and geophysicists dealing with the design of floating and/or flexible marine structures. The book’s underlying mathematical tools can be easily extended to deal with physical problems in the area of acoustics, electromagnetic waves, wave propagation in elastic media, and solid‐state physics. Designed for both the classroom and independent study, Mathematical Techniques for Wave Interaction with Flexible Structures enables readers to appreciate and apply the mathematical tools of wave structure interaction research to their own work.
Book Synopsis The Interaction of Ocean Waves and Wind by : Peter Janssen
Download or read book The Interaction of Ocean Waves and Wind written by Peter Janssen and published by Cambridge University Press. This book was released on 2004-10-28 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book was published in 2004. The Interaction of Ocean Waves and Wind describes in detail the two-way interaction between wind and ocean waves and shows how ocean waves affect weather forecasting on timescales of 5 to 90 days. Winds generate ocean waves, but at the same time airflow is modified due to the loss of energy and momentum to the waves; thus, momentum loss from the atmosphere to the ocean depends on the state of the waves. This volume discusses ocean wave evolution according to the energy balance equation. An extensive overview of nonlinear transfer is given, and as a by-product the role of four-wave interactions in the generation of extreme events, such as freak waves, is discussed. Effects on ocean circulation are described. Coupled ocean-wave, atmosphere modelling gives improved weather and wave forecasts. This volume will interest ocean wave modellers, physicists and applied mathematicians, and engineers interested in shipping and coastal protection.
Book Synopsis Dynamics and Modelling of Ocean Waves by : G. J. Komen
Download or read book Dynamics and Modelling of Ocean Waves written by G. J. Komen and published by Cambridge University Press. This book was released on 1994-09-15 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive introduction and reference prepared by the world's leading ocean wave modellers.
Book Synopsis Investigation of Ice Motion and Wave Generated Ice Conditions During LIMEX'89 by :
Download or read book Investigation of Ice Motion and Wave Generated Ice Conditions During LIMEX'89 written by and published by . This book was released on 1991 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: The marginal ice zone (MIZ) of the Southern Labrador Sea is an area of increasing interest from an economic and scientific point of view. The Waves-In-Ice program of the Labrador Ice Margin Experiment, LIMEX'89, provided in-depth investigation into wave processes in the MIZ to adequately model wave-ice interaction, to provide in-situ ice motion data for interpretation of airborne SAR images of surface waves, and to investigate the applicability and accuracy of in situ measurements of ocean waves and wave-induced ice motion using both traditional and new techniques. Data collected by the MV TERRA NORDICA during the field cruise included meteorological parameters, sea state, wave induced ice motion, ice dispersion, quantitative wave observation by shipboard marine radar and wave height altimeter, and ice properties. In addition, four SAR flights were carried out during the experiment. This paper describes the field experiment, data collection, and analysis techniques. Derivation of wave spectra from six degrees of freedom measurements is carried out, and the validity of using Longuet- Higgins technique for heave-pitch-roll buoy data is examined. The paper also presents preliminary results of intercomparisons between different data sources including the SAR wave data.
Book Synopsis Sea Ice Analysis and Forecasting by : Tom Carrieres
Download or read book Sea Ice Analysis and Forecasting written by Tom Carrieres and published by Cambridge University Press. This book was released on 2017-10-05 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an advanced introduction to the science behind automated prediction systems, focusing on sea ice analysis and forecasting. Starting from basic principles, fundamental concepts in sea ice physics, remote sensing, numerical methods, and statistics are explained at an accessible level. Existing operational automated prediction systems are described and their impacts on information providers and end clients are discussed. The book also provides insight into the likely future development of sea ice services and how they will evolve from mainly manual processes to increasing automation, with a consequent increase in the diversity and information content of new ice products. With contributions from world-leading experts in the fields of sea ice remote sensing, data assimilation, numerical modelling, and verification and operational prediction, this comprehensive reference is ideal for students, sea ice analysts, and researchers, as well as decision-makers and professionals working in the ice service industry.
Book Synopsis Modeling and Simulations of Wave-ice Interactions by : Boyang Xu
Download or read book Modeling and Simulations of Wave-ice Interactions written by Boyang Xu and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The problem of wave-ice interactions in the marginal ice zone is investigated. Two principal mechanisms: scattering by ice floes and dissipative processes, may cause the wave spectrum attenuation. These two mechanisms are studied both theoretically and numerically.
Book Synopsis Contemporary Wave-ice Interaction Models by : Johannes E M. Mosig
Download or read book Contemporary Wave-ice Interaction Models written by Johannes E M. Mosig and published by . This book was released on 2018 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transport equation models describe the propagation of the wave action density (which is proportional to the wave energy density) in terms of a transport equation that is commonly used in ocean wave modelling. A term to represent the effect of floating sea ice is known for sparse collections of floes, but this is not valid at high concentrations. As a result, we derive the transport equation for a continuous ice cover of random thickness as a first step towards a transport equation model for high ice concentration. The attenuation coefficients predicted by this new equation turn out to be unrealistic. Hence, we outline an alternative derivation that may be explored in future work.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Mechanical Properties of Sea Ice by : W. F. Weeks
Download or read book The Mechanical Properties of Sea Ice written by W. F. Weeks and published by . This book was released on 1967 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: The review discusses the state of thinking of each of the main national groups investigating sea ice and gives an overall appraisal of the field as a whole. Emphasis is placed on (1) the physical basis for interpreting sea ice strength (phase relations, air volume, and structural considerations), (2) theoretical considerations (strength models, air bubbles and salt reinforcement, and interrelations between growth conditions and strength), (3) experimental results (tensile, flexural, shear, and compressive strength, elastic modulus, shear modulus and Poisson's ratio, time dependent effects, and creep), and (4) plate characteristics. The paper includes a review of problems in sea ice investigations, relates the chemical, crystallographic, mechanical, and physical aspects involved, and concludes by showing how to utilize this knowledge to solve practical problems. (Author).
Book Synopsis Numerical Study of Sea Ice Dynamics and Wave-ice Interactions in the Marginal Ice Zone by : Jean-Pierre Auclair
Download or read book Numerical Study of Sea Ice Dynamics and Wave-ice Interactions in the Marginal Ice Zone written by Jean-Pierre Auclair and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Marginal Ice Zone (MIZ) is a highly dynamic region between the open ocean and the inner ice pack. The ice over this region is subjected to waves, introducing new forces but also changing the ice from a cohesive material to a mobile collection of floes. Until recently, the challenges posed by in-situ ice measurements in the MIZ prevented a detailed characterization of changes in the ice cover. The rapidly changing conditions over short distances have also prevented detailed numerical simulations. Recent developments in observational and computational capabilities allow further investigations of the physical processes for ice formation and wave-ice interactions in the MIZ. Many features of the MIZ remain to be explained and quantified, particularly rapid ice movement near the ice edge and ice thickening under wave pressure. In order to investigate these and support future field and numerical studies, a model of the MIZ is developed with a new numerical method better suited for high resolution. Simulations of waves causing ice compaction and the ice edge jet are then performed to detail the expected impacts of waves on sea ice. The potential of numerical improvements in sea ice models to obtain greater efficiency and accuracy at high resolutions is successfully demonstrated. The addition of the wave radiative stress allows the generation of realistic thickness profiles, provided that the sea ice strength is modified to represent the difference between pack ice and thinner ice. With the same modifications, obliquely incident waves on the ice edge produced an ice edge jet with a range of characteristics depending on wave parameters and modeled interactions. The magnitude of wave attenuation in sea ice and the ice strength are found to be very important factors in the simulations. Consideration of wave effects on ice thickness and drift speed are also shown to have potential to increase both open water and ice formation.
Author :National Academies of Sciences, Engineering, and Medicine Publisher :National Academies Press ISBN 13 :0309456002 Total Pages :83 pages Book Rating :4.3/5 (94 download)
Book Synopsis Antarctic Sea Ice Variability in the Southern Ocean-Climate System by : National Academies of Sciences, Engineering, and Medicine
Download or read book Antarctic Sea Ice Variability in the Southern Ocean-Climate System written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2017-04-24 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt: The sea ice surrounding Antarctica has increased in extent and concentration from the late 1970s, when satellite-based measurements began, until 2015. Although this increasing trend is modest, it is surprising given the overall warming of the global climate and the region. Indeed, climate models, which incorporate our best understanding of the processes affecting the region, generally simulate a decrease in sea ice. Moreover, sea ice in the Arctic has exhibited pronounced declines over the same period, consistent with global climate model simulations. For these reasons, the behavior of Antarctic sea ice has presented a conundrum for global climate change science. The National Academies of Sciences, Engineering, and Medicine held a workshop in January 2016, to bring together scientists with different sets of expertise and perspectives to further explore potential mechanisms driving the evolution of recent Antarctic sea ice variability and to discuss ways to advance understanding of Antarctic sea ice and its relationship to the broader ocean-climate system. This publication summarizes the presentations and discussions from the workshop.
