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Drift, Deformation, and Fracture of Sea Ice: A Perspective Across Scales

Drift, Deformation, and Fracture of Sea Ice: A Perspective Across Scales (Paperback)

£44.99
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Synopsis

Sea ice is a major component of polar environments, especially in the Arctic where it covers the entire Arctic Ocean throughout most of the year. However, in the context of climate change, the Arctic sea ice cover has been declining significantly over the last decades, either in terms of its concentration or thickness. The sea ice cover evolution and climate change are strongly coupled through the albedo positive feedback, thus possibly explaining the Arctic amplification of climate warming. In addition to thermodynamics, sea ice kinematics (drift, deformation) appears as an essential factor in the evolution of the ice cover through a reduction of the average ice age (and consequently of the cover's thickness), or ice export out of the Arctic. This is a first motivation for a better understanding of the kinematical and mechanical processes of sea ice. A more upstream, theoretical motivation is a better understanding of the brittle deformation of geophysical objects across a wide range of scales. Indeed, owing to its very strong kinematics, compared e.g. to the Earth's crust, an unrivaled kinematical data set is available for sea ice from in situ (e.g. drifting buoys) or satellite observations. Here, we review the recent advances in the understanding of sea ice drift, deformation and fracturing obtained from these data. We focus particularly on the scaling properties in time and scale that characterize these processes, and we emphasize the analogies that can be drawn from the deformation of the Earth's crust. These scaling properties, which are the signature of long-range elastic interactions within the cover, constrain future developments in the modeling of sea ice mechanics. We also show that kinematical and rheological variables such as average velocity, average strain-rate or strength have significantly changed over the last decades, accompanying and actually accelerating the Arctic sea ice decline.

Science & MathematicsEarth sciencesHydrology & the hydrosphereOceanography, the study of seasScience & MathematicsPhysicsApplied physicsGeophysicsTechnicalEnvironmental science, engineering & technology Publisher: Springer Publication Date: 05/03/2013 ISBN-13: 9789400762015  Details: Type: Paperback Format: Books
Availability: Printed to order. Despatched in 2-3 weeks.  

Jerome Weiss completed his PhD in Material Science at the Ecole des Mines of Paris in 1992. He is CNRS senior scientist in the Laboratory of Glaciology and Geophysics of the Environment in Grenoble, where he led the Ice Mechanics group until 2009. His research interests cover the mechanics of geophysical objects, from the scale of lattice defects (dislocations, microcracks) to large geophysical scales. He is therefore particularly interested in scaling properties of mechanical-related variables. During the last decade, he particularly focused on the Arctic sea ice cover, its mechanical behavior, drift, and deformation, as well as its role on climate change. He has published about 85 scientific papers, including 7 solicited reviews and 6 general public articles.

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