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Comparison Of Eulerian And Lagrangian Models For The Forecasting Of Regional Scale Sea Ice Motion
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Book Synopsis Comparison of Eulerian and Lagrangian Models for the Forecasting of Regional Scale Sea Ice Motion by : J. F Sykes
Download or read book Comparison of Eulerian and Lagrangian Models for the Forecasting of Regional Scale Sea Ice Motion written by J. F Sykes and published by . This book was released on 1983 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This study considers the effect of the choice of reference frame, Lagrangian or Eulerian, on numerical models for regional ice forecasting. Four models were selected for this analysis. These are RIM/EHB, the Hibler finite difference model, EIS, an Eulerian finite element model, EMC, an Eulerian finite element model with a Lagrangian thickness distribution and LMC, a fully Lagrangian finite element model. Two major components of these models are identified, the momentum balance and the thickness distribution. The choice of reference frame for each of these was considered. This was accomplished by a series of generic scenarios, including a thick ice feature in a region of thinner ice, a discontinuity from thick to thin ice and flow past an island. For the thickness distribution, the choice of an Eulerian or Lagrangian reference system is critical, while for momentum it is not significant. In some cases, differences due to the constitutive law and numerical solution techniques overshadowed the influence of the reference frame. A Beaufort Sea scenario was simulated, showing how the various models handle land boundaries and the multi-year pack. Several recommendations are made that will improve forecast capabilities for regional scale ice motion."--ASTIS [online] database.
Book Synopsis An Investigation of the Reference Frame and Strength Formulation in Regional Scale Ice Forecast Models by : Richard Frank McKenna
Download or read book An Investigation of the Reference Frame and Strength Formulation in Regional Scale Ice Forecast Models written by Richard Frank McKenna and published by . This book was released on 1984 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This report summarizes the results of a numerical ice modelling study for the southern Beaufort Sea during February and March 1983. Though a major goal was to assess differences in the results derived from Eulerian and Lagrangian treatments of the ice velocity field, data analysis procedures and model calibration are also discussed. A statistical spatial estimation technique was employed to interpolate winds to a regular grid. Ice motion and ice cover characteristics were extracted from SLAR imagery. A sensitivity analysis was conducted to test the effect of ice thickness and ridging constants on ice strength, as calculated using a multicategory thickness distribution. This assisted in the model calibration that followed, which included the consideration of ice strength and the constitutive law. To assess the quality of ice hindcasts, a performance measure was used which compared observed and calculated ice motion fields. Adequate calibration proved difficult with such a complex model, though it was still possible to compare Eulerian and Lagrangian approaches. There is little justification for choosing one approach over the other in terms of reliability of ice motion forecasts, however differences in resulting ice fields and run costs were significant. (Au)"--ASTIS [online] bibliography.
Book Synopsis POAC '85 : the 8th International Conference on Port and Ocean Engineering Under Arctic Conditions : Proceedings, Narssarssuaq, Greenland, September 7-14, 1985 by : Dansk hydraulisk institut
Download or read book POAC '85 : the 8th International Conference on Port and Ocean Engineering Under Arctic Conditions : Proceedings, Narssarssuaq, Greenland, September 7-14, 1985 written by Dansk hydraulisk institut and published by Hørsholm, Denmark : Danish Hydraulic Institute. This book was released on 1985 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: Topics covered include sea ice properties, Arctic oceanography and meteorology, marine geology and soil mechanics, behaviour of materials and structures in the Arctic, harbour structures in Greenland, coastal and offshore structures, underwater technology, technical and economic aspects of navigation in cold regions, icebreaking technology, offshore operations and the environment and topics unique to the Greenland environment.
Book Synopsis A Regional Seasonal Forecast Model of Arctic Minimum Sea Ice Extent by : Rachel Kim
Download or read book A Regional Seasonal Forecast Model of Arctic Minimum Sea Ice Extent written by Rachel Kim and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Thinning sea ice cover in the Arctic is associated with larger interannual variability in the minimum Sea Ice Extent (SIE). The current generation of forced or fully coupled models, however, have difficulty predicting SIE anomalies from the long-term trend, highlighting the need to better identify the mechanisms involved in the seasonal evolution of sea ice cover. One such mechanism is Coastal Divergence (CD), a proxy for ice thickness anomalies based on late winter ice motion, quantified using Lagrangian ice tracking. CD gains predictive skill through the positive feedback of surface albedo anomalies, mirrored in Reflected Solar Radiation (RSR), during melt season. Exploring the dynamic and thermodynamic contributions to minimum SIE predictability, RSR, SIE and CD are compared as predictors using a regional seasonal sea ice forecast model for July 1, June 1 and May 1 forecast dates for all Arctic peripheral seas. The predictive skill of June RSR anomalies mainly originates from open water fraction at the surface, i.e. June SIE and June RSR have equal predictive skill for most seas. The finding is supported by the surprising positive correlation found between June Melt Pond Fraction (MPF) and June RSR in all peripheral seas: MPF anomalies indicate presence of ice or open water that is key to creating minimum SIE anomalies. This contradicts models that show correlation between melt onset, MPF and the minimum SIE. A hindcast model shows that for a May 1 forecast, CD anomalies have better predictive skill than RSR anomalies for most peripheral seas"--
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 A Comparison of Sea Ice Model Results Using Three Different Wind Forcing Fields by : W. B. Tucker
Download or read book A Comparison of Sea Ice Model Results Using Three Different Wind Forcing Fields written by W. B. Tucker and published by . This book was released on 1983 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Lagrangian Analysis and Prediction of Coastal and Ocean Dynamics by : Annalisa Griffa
Download or read book Lagrangian Analysis and Prediction of Coastal and Ocean Dynamics written by Annalisa Griffa and published by Cambridge University Press. This book was released on 2007-05-10 with total page 479 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by a group of international experts in their field, this book is a review of Lagrangian observation, analysis and assimilation methods in physical and biological oceanography. This multidisciplinary text presents new results on nonlinear analysis of Lagrangian dynamics, the prediction of particle trajectories, and Lagrangian stochastic models. It includes historical information, up-to-date developments, and speculation on future developments in Lagrangian-based observations, analysis, and modeling of physical and biological systems. Containing contributions from experimentalists, theoreticians, and modelers in the fields of physical oceanography, marine biology, mathematics, and meteorology, this book will be of great interest to researchers and graduate students looking for both practical applications and information on the theory of transport and dispersion in physical systems, biological modeling, and data assimilation.
Book Synopsis Proceedings of the Eighth International Conference on Offshore Mechanics and Arctic Engineering, 1989: Arctic and polar technology by :
Download or read book Proceedings of the Eighth International Conference on Offshore Mechanics and Arctic Engineering, 1989: Arctic and polar technology written by and published by . This book was released on 1989 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Lagrangian Sea Ice Motion Derived from Eulerian Satellite Products Compared with In-situ Drift Trajectories by :
Download or read book Lagrangian Sea Ice Motion Derived from Eulerian Satellite Products Compared with In-situ Drift Trajectories written by and published by . This book was released on 2012 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering by :
Download or read book Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering written by and published by . This book was released on 1989 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Drift of Sea Ice by : Matti Leppäranta
Download or read book The Drift of Sea Ice written by Matti Leppäranta and published by Springer Science & Business Media. This book was released on 2005 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: The author presents in The Drift of Sea Ice the fundamental laws of sea ice drift which come from the material properties of sea ice and the basic laws of mechanics. The resulting system of equations is analysed for the general properties of sea ice drift, the free drift model and analytical models for ice drift in the presence of internal friction, and the construction of numerical ice drift models is detailed. The science of sea ice drift through its 100-year history to the present day is explained. The text includes the geophysical theory, observations from field programs, and mathematical models. Topics covered include the science of sea ice drift, forecasting drift velocity based on volume, size and shape, sea ice ridging and remote sensing, modelling of the ice conditions, and finally the role of sea ice drift in research fields in ice-covered seas, oceanography, marine ecology and engineering.
Book Synopsis Oceanobs'19: An Ocean of Opportunity. Volume III by : Tong Lee
Download or read book Oceanobs'19: An Ocean of Opportunity. Volume III written by Tong Lee and published by Frontiers Media SA. This book was released on 2020-12-31 with total page 867 pages. Available in PDF, EPUB and Kindle. Book excerpt: This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact.
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: A comprehensive overview of the science involved in automated prediction of sea ice, for sea ice analysts, researchers, and professionals.
Book Synopsis Workshop on Ice Penetration Technology by :
Download or read book Workshop on Ice Penetration Technology written by and published by . This book was released on 1984 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ice Dynamics written by William D. Hibler and published by . This book was released on 1984 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph reviews essential aspects of sea ice dynamics on the geophysical scale and discusses the role of ice dynamics in air-sea-ice interaction. The review is divided into the following components: (a) a discussion of the momentum balance describing ice drift, (b) an examination of the nature of sea ice rheology on the geophysical scale, (c) an analysis of the relationship between ice strength and ice thickness characteristics, and (d) a discussion of the rle of ice dynamices in the atmosphere-ice-ocean system. Because of the unique, highly nonlinear nature of sea-ice interaction, special attention is given to the ramifications of ice interaction on sea ice motion and deformation. These ramifications are illustrated both by analytic solution and by numerical model results. In addition, the role of ice dynamics in the atmosphere-ice-ocean system is discussed in light of numerical modeling experiments, including a fully coupled ice-ocean model of the Arctic-Greenland-Norwegian seas.
Book Synopsis Long-Range Ice Forecasting System (LRIFS) Applied for the Beaufort Sea by : L. W. Davidson
Download or read book Long-Range Ice Forecasting System (LRIFS) Applied for the Beaufort Sea written by L. W. Davidson and published by . This book was released on 1993 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: Applied research conducted from 1984 to 1990 on behalf of the Environmental Studies Research Funds (ESRF) and Ice Centre Environment Canada (ICEC) has resulted in the implementation of an operational Long Range Ice (sea ice and iceberg severity) Forecasting System (LRIFS) at Ice Centre, Ottawa. The LRIFS system employs statistical models based on Empirical Orthogonal Function (EOF) analyses of up to 40 years of regional surface and upper air weather data to predict abundance of sea ice and icebergs, in some locations up to six months prior to occurence. The system also makes provision of the use of ice anomaly data to predict future ice conditions. In the present work, this system has been generalized from its previous east coast base, and is now configured for use anywhere in the northern hemisphere. Major enhancements has been introduced to automate the identification of potentially viable meteorological predictors, and tests have been added to eliminate predictors showing artificial skill.
Book Synopsis Regional Scale Dynamical Thermodynamical Model for Unconsolidated Sea Ice by : Venkata R. Neralla
Download or read book Regional Scale Dynamical Thermodynamical Model for Unconsolidated Sea Ice written by Venkata R. Neralla and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "The objective of this study is to develop a regional scale sea ice dynamics model for obtaining short range, real time or near-real time predictions of ice conditions for operational use. Hibler's ... dynamic - thermodynamic formulation is modified to suit this objective. The regional-scale model consists of (1) a momentum equation which includes air to ice stress, water to ice stress, Coriolis force, ocean tilt and internal ice resistance, (2) a constitutive law which relates the ice stress to the strain rate and the ice strength and (3) continuity equations for ice thickness and concentration. The continuity equations consider a simple ice thickness distribution which is the same as the one used in Hibler's ... model. An improved thermodynamic formulation for use in the ice thickness distribution is being developed and will be incorporated later into this model. A plastic viscous rheology is used for modelling the ice-ice interaction. Other stresses are parameterized using standard methods. A finite difference numerical procedure is used for solving the equations. The regional ice model is run on a 22 x 22 array with a grid size of 42.3 km and a time step of 3 hours. Model integrations out to 48 hours have been performed and the simulations are compared with data collected during the November/December 1979 Winter Ice Experiment in the Beaufort Sea .... The drift comparisons show the simulated velocities and observed drift to be in reasonable agreement especially considering that errors due to poorly resolved wind and water currents can be substantial. A number of sensitivity and model sophistication tests are planned to further validate the model and the results from it"--Leaf iii.
