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A Mesoscale Air Ice Ocean Feedback Mechanism For The Ice Drift In The Marginal Ice Zone
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Book Synopsis A Mesoscale Air-Ice-Ocean Feedback Mechanism for the Ice Drift in the Marginal Ice Zone by :
Download or read book A Mesoscale Air-Ice-Ocean Feedback Mechanism for the Ice Drift in the Marginal Ice Zone written by and published by . This book was released on 1988 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ice drift in the marginal ice zone (MIZ) is a very important feature of air-ice-ocean interaction at high latitude. Thermally generated surface winds, blowing from ice to water (ice breeze) with some deflection due to the earth rotation, force the ice drift and ocean currents near the MIZ. By changing the surface temperature gradient, the ice motion and the ocean currents feed back on the surface winds. A coupled air-ice-ocean theoretical model for the MIZ is employed to discuss the ice drift pattern with such a feedback mechanism. The steady-state solutions show that an off-ice and divergent wind field not only producee a dilation of the MIZ (as people generally think), but also generates a compaction of MIZ for some circumstances. An ice divergence/convergence criterion is found. The time-dependent solutions show that the ice motion exhibits two bifurcations. First, it bifurcates into decaying and growing modes. Second, the growing mode bifurcatee into non-oscillatory and oscillatory states. Finally, the model predicts the ice edge upwelling.
Book Synopsis MIZEX: A Program for Mesoscale Air-Ice-Ocean Interaction Experiments in Arctic Marginal Ice Zones. MIZEX Bulletin VII. by : Miles G. McPhee
Download or read book MIZEX: A Program for Mesoscale Air-Ice-Ocean Interaction Experiments in Arctic Marginal Ice Zones. MIZEX Bulletin VII. written by Miles G. McPhee and published by . This book was released on 1986 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents: A Note on Estimating Melt Rate in the MIZ; Kinematics of Marginal Ice: MIZEX 83; On Estimating Ice Stress from MIZEX 83 Ice Deformation and Current Measurements; Crystal Structure of Fram Strait Sea Ice; MIZEX 84 Ice Surface Measurements from the FS Polarstern; 1984-85 Current Observations in the East Greenland Current: A Preliminary Description; An Ice/Air Feedback Mechanism for the Migration of the Marginal Ice Zone; The Planetary Boundary Layer in the Marginal Ice Zone; and An Air Ice Ocean Coupled Model for the Formation of Leads or Polynyas.
Book Synopsis Dynamics of the Coupled Ice-ocean System in the Marginal Ice Zone by : Sirpa Häkkinen
Download or read book Dynamics of the Coupled Ice-ocean System in the Marginal Ice Zone written by Sirpa Häkkinen and published by . This book was released on 1984 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study is aimed at the modelling of mesoscale processes such as up/downwelling and ice edge eddies in the marginal ice zones. A 2-dimensional coupled ice-ocean model is used for the study. The ice model is coupled to the reduced gravity ocean model (f-plane) through interfacial stresses. The constitutive equations of the sea ice are formulated on the basis of the Reiner-Rivlin theory. The internal ice stresses are important only at high ice concentrations (90-100%), otherwise the ice motion is essentially free drift, where the air-ice stress is balanced by the ice-water stress. The model was tested by studying the upwelling dynamics. Winds parallel to the ice edge with the ice on the right produce upwelling because the air-ice momentum flux is much greater than air-ocean momentum flux, and thus the Ekman transport is bigger under the ice than in the open water. The upwelling simulation was extended to include temporally varying forcing, which was chosen to vary sinusoidally with 4 day period. This forcing resembles successive cyclone passings. In the model with thin oceanic upper layer, ice bands were formed. The up/downwelling signals do not disappear in wind reversals because of nonlinear advection. This leads to convergences and divergences in oceanic and ice velocities which manifest themselves as ice banding. At least one wind reversal is needed to produce one ice band.
Book Synopsis MIZEX, A Program for Mesoscale Air-Ice-Ocean Interaction Experiments in Arctic Marginal Ice Zones. VI. MIZEX-WEST. by : Peter Wadhams
Download or read book MIZEX, A Program for Mesoscale Air-Ice-Ocean Interaction Experiments in Arctic Marginal Ice Zones. VI. MIZEX-WEST. written by Peter Wadhams and published by . This book was released on 1985 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: Partial Contents: Observations of Ice and Snow in the Eastern Part of the Chukchi Sea; Temperature and Salinity Observations in the Bering Sea Winter MIZ; Regional Ice Drift during MIZEX-West; Ice Dispersion in the Bering Sea Marginal Ice Zone; Motion of Ice Edge Radar Transponders during MIZEX=West; Bottom Ablation Measurements of Air-Ice Drag Coefficients; Geostrophic Drag of High Latitude Atmospheric Boundary Layer; NASA CV-900 Aircraft Observations during MIZEX-West; Measurement of the Complex Refractive Index of First-Year Sea Ice and Snow Using a Microwave Untuned Cavity; Fluctuations of Flow through Bering Strait; Theory of Wind-Driven Coastal Polynyas.
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 2007-03-06 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the fundamental laws of sea ice drift, as derived from the material properties of sea ice, the basic laws of mechanics, and the latest modeling techniques. Topics covered include the science of sea ice drift, forecasting velocity based on volume, size and shape, sea ice ridging and remote sensing, modelling of ice conditions, and the role of sea ice drift in oceanography, marine ecology and engineering.
Book Synopsis MIZEX. A Program for Mesoscale Air-Ice-Ocean Interaction Experiments in Arctic Marginal Ice Zones. III. Modeling the Marginal Ice Zone by : W. D. Hibler (III.)
Download or read book MIZEX. A Program for Mesoscale Air-Ice-Ocean Interaction Experiments in Arctic Marginal Ice Zones. III. Modeling the Marginal Ice Zone written by W. D. Hibler (III.) and published by . This book was released on 1984 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main goal of the marginal ice zone experiment (MIZEX) is to understand the processes that dictate the advance and retreat of the ice margin. Mechanistic model sensitivity studies can greatly aid in this goal by identifying the relative importance of different processes in the total system. In addition, more complete simulation models can be used both to test the adequacy of current understanding of the marginal ice zone and to serve as an integrating device for complex data sets. This volume contains the main results from a MIZEX modeling workshop held 18-20 October in Hanover, New Hampshire. Modelers interested in both Arctic and Antarctic sea ice were present. The purpose of the workshop was to determine the status of marginal ice zone modeling and to discuss different views on modeling processes in the MIZ. Results from full simulation models, mechanistic models, and empirical statistical models were presented and discussed. In addition, recommendations relevant to experimental measurements were made. The recommendations were divided into ocean, ice, and atmospheric categories; these were also the three main subject areas covered by the presentations. Overall, the workshop helped to identify areas where further simulations are needed to test our understanding and where knowledge of certain processes is lacking.
Book Synopsis MIZEX (Marginal Ice Zone Program): A Program for Mesoscale Air-Ice-Ocean Interaction Experimemts Om Arctic Marginal Ice Zones. V. MIZEX 84. Summer Experiment PI (Principal Investigator) Preliminary Reports by : O. M. Johannessen
Download or read book MIZEX (Marginal Ice Zone Program): A Program for Mesoscale Air-Ice-Ocean Interaction Experimemts Om Arctic Marginal Ice Zones. V. MIZEX 84. Summer Experiment PI (Principal Investigator) Preliminary Reports written by O. M. Johannessen and published by . This book was released on 1984 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents: Oceanography; Ice; Meteorology; Remote Sensing; Acoustics; Biology.
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 1988 with total page 970 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book MIZEX written by and published by . This book was released on 1984 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book MIZEX written by P. Wadhams and published by . This book was released on 1981 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document describes the research strategy for a series of mesoscale studies of Arctic marginal ice zones. The main goal of this program is to gain a better understanding of the processes occurring at the ice margin. These processes are relevant to climate, weather forecasting, petroleum exploration and production, marine transportation, naval operations, and commercial fisheries. In addition, MIZEX will aid in determining what modifications to existing ice-ocean-atmospheric models are needed for better prediction near the ice margin. These goals are consistent with recommendations made by international scientific bodies, most notably those of the Joint Scientific Committee (JSC) in its plan for the World Climate Research Programme (WMO-ICSU, 1981). In this document the JSC states that for improved modeling it is necessary: 'To study the physical processes affecting interactions between air, ice and sea at the sea-ice margin and to develop methods for their adequate representation in climate models.' More specific details on initial field programs will be addressed in planning meetings in the near future. In addition, it is anticipated that other aspects of the program, such as modeling, will be addressed in future workshops, with the results distributed in a similar format to this research strategy.
Book Synopsis A Program for Mesoscale Air-ice-ocean Interaction Experiments in Arctic Marginal Ice Zones -1-research Strategy by : Cold Regions Research and Engineering Laboratory (U.S.)
Download or read book A Program for Mesoscale Air-ice-ocean Interaction Experiments in Arctic Marginal Ice Zones -1-research Strategy written by Cold Regions Research and Engineering Laboratory (U.S.) and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis MIZEX, a Program for Mesoscale Air-ice-ocean Interaction Experiments in Arctic Marginal Ice Zones by :
Download or read book MIZEX, a Program for Mesoscale Air-ice-ocean Interaction Experiments in Arctic Marginal Ice Zones written by and published by . This book was released on 1984 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents: Drift Velocity During the Drift-Station Phase of MIZEX 83; MIZEX 83--BIO Buoy Data Summary; MIZEX 83 Mesoscale Sea Ice Dynamics--Initial Analysis; On the Rheology of a Broken Ice Field Due to Floe Collision; Heat and Mass Balance Observations During the MIZEX 83 Drift Program; Ocean Currents and Temperatures in the Center of Fram Strait During MIZEX 83; and Arctic Whitecapping--Preliminary results.
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 1991 with total page 1460 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
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 2011-03-22 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Second Edition of The Drift of Sea Ice presents 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. This second edition of a much lauded work, unique on this topic in the English language, has been revised, updated and expanded with much new information and outlines recent results, in particular in relation to the climate problem, mathematical modelling and ice engineering applications. The current book presents the theory, observations, mathematical modelling techniques, and applications of sea ice drift science. The theory is presented from the beginning on a graduate student level, so that students and researchers coming from other fields such as physical oceanography, meteorology, physics, engineering, environmental sciences or geography can use the book as a source book or self-study material. First the drift ice material is presented ending with the concept of ‘ice state’ – the relevant properties in sea ice dynamics. Ice kinematics observations are widely presented with the mathematical analysis methods, and thereafter come drift ice rheology – to close the triangle material – kinematics – stress. The momentum equation of sea ice is derived in detail and its general properties are carefully analysed. Then follow two chapters on analytical models: free drift and drift in the presence of internal friction: These are very important tools in understanding the dynamical behaviour of sea ice. The last topical chapter is numerical models, which are the modern tool to solve ice dynamics problem in short term and long term problems. The closing chapter summarises sea ice dynamics applications and the need of sea ice dynamic knowledge and gives some final remarks on the future of this branch of science.
Book Synopsis MIZEX: A Program for Mesoscale Air-Ice-Ocean Interaction Experiments in Arctic Marginal Ice Zones. VIII. A Science Plan for a Winter Marginal Ice Zone Experiment in the Fram Strait/Greenland Sea: 1987/89 by : Kenneth Davidson
Download or read book MIZEX: A Program for Mesoscale Air-Ice-Ocean Interaction Experiments in Arctic Marginal Ice Zones. VIII. A Science Plan for a Winter Marginal Ice Zone Experiment in the Fram Strait/Greenland Sea: 1987/89 written by Kenneth Davidson and published by . This book was released on 1986 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present plan is motivated by the need to improve our understanding of the fundamentals of acoustic propagation, noise, and electromagnetic remote sensing in the winter marginal ice zone (MIZ). The plan strongly emphasizes oceanography, ice dynamics, and meteorology. In fact, the latter disciplines must be deeply enough researched to resolve fundamental questions entailing air/ice/ocean interaction, heat and mass exchanges and balances, growth and decay of ice-edge eddies, etc. Detailed scientific objectives are examined for oceanography, meteorology, ice physics, remote sensing, and acoustics together with detailed experimental plans, and a discussion of logistics for these experiments.
Book Synopsis A Numerical Study of a Mesoscale Eddy Interaction with an Ocean Front in the Marginal Ice Zone by : Rutledge P. Lumpkin
Download or read book A Numerical Study of a Mesoscale Eddy Interaction with an Ocean Front in the Marginal Ice Zone written by Rutledge P. Lumpkin and published by . This book was released on 1989 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The East Greenland Current and its associated marginal ice zone is a region of intense dynamic activity. A two layer, primitive equation, numerical model is used to simulate an eddy-jet interaction in the East Greenland marginal ice zone region. The effects of wind direction, topography, and sense of eddy rotation on the eddy-jet interaction are examined to determine the seaward ice transport, icebanding, and dipole formation. It is determined that an anticyclone (15 cm/s) interacting with a jet (30 cm/s) will develop a dipole that advects ice away from the ice edge. The dipole formation and ice advection away from the ice edge is not seen for a cyclone-jet interaction. It is also seen that a jet with no winds flowing parallel to the ice edge will create an iceband due to the cross ice edge Ekman transport. The interaction of both the cyclone and anticyclone with the jet creates downstream perturbations in the jet leading to a sinuous ice edge. Winds greater that 10 m/s dominate the ice dynamics over that induced by the ocean flow fields. Keywords: Ocean currents; Air water interactions; Eddies fluid mechanics; Jet flow; Ocean circulation; Ekman transport properties. Theses.
Book Synopsis The Effects of Time-Dependent Winds and Ocean Eddies on Ice Motion in a Marginal Ice Zone by : Jeffrey L. Barker
Download or read book The Effects of Time-Dependent Winds and Ocean Eddies on Ice Motion in a Marginal Ice Zone written by Jeffrey L. Barker and published by . This book was released on 1987 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: Observations made during the MIZEX program indicate the presence of mesoscale eddies in the ocean front at the marginal ice edge in the East Greenland Current. The eddies ranged in scale from 5 to 80 km. Barotropic and baroclinic instability may be the physical mechanisms responsible for the existence of such eddies. The observations also indicate transient wind reversals (3-10 m/s) with a frequency of several days. Here the effect of time-dependent winds and ocean eddies on ice motion in a marginal ice zone is studied. Results are obtained with a two-layer, nonlinear, primitive equation ocean model and a coupled free-drift ice model. THe results indicate that ocean eddy signature in the ice edge is sensitive to cross-ice-edge motion induced by the winds and is shown to be dependent on magnitude, direction, and duration of the wind.
