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The Thermophysics of Glaciers

Author: I.A. Zotikov

Publisher: Springer


Category: Science

Page: 275

View: 383

Glaciers or ice sheets are natural accumulations of ice possessing in trinsic motion, which have appeared on the Earth's land surface as a result of the accumulation and transformation of precipitation [2]. Only a very small portion of the surface of the land is now covered by glaciers, and at low latitudes they are found justat high elevations, on mountain slopes. However, glaciers are known to play very important roles in shaping the topography of the Earth, in determiningits past, present, and future climate, and in creating the state of the world Ocean. Recently there has also been a marked increase in the practical value of our knowledge about glaciers, as a part of the human habitat and as a factor affecting the economy. Interest in glaciers on other planets is also growing. Voyages of spacecraft to Jupiter, for instance, have shown that some Jovian satellites possess ice sheets tens of kilometers in thickness.


Author: Peter Knight

Publisher: Routledge


Category: Science

Page: 272

View: 703

This book offers a comprehensive and detailed summary of our knowledge and understanding of glaciers and sets them within a global environment context. The text explains the significance both of recent advances in glaciology, and of teh many research problms that remain to be solved. The accessible style adopted in the text facilitates a clear understanding of glaciers and the role they play in global issues such as environmental change, geoorphology and hydrology. The use of complex mathematics is avoided as the reader is introduced to important concepts and techniques in modern glaciology such as deforming beds, migrating ice-divides and stable isotope analysis. This is an essential reference book for sutdents, professional geologists and researchers and would be ideal for those who want either a rapid up-date or an introduction to the subject. The books' discussion of recent discoveries and of reserch issues for the future, supported by a thorough reference list, enables readers to pursue their own areas of particular interest.

Dynamics of Ice Sheets and Glaciers

Author: Ralf Greve

Publisher: Springer Science & Business Media


Category: Science

Page: 288

View: 744

Dynamics of Ice Sheets and Glaciers presents an introduction to the dynamics and thermodynamics of flowing ice masses on Earth. Based on an outline of general continuum mechanics, the different initial-boundary-value problems for the flow of ice sheets, ice shelves, ice caps and glaciers are systematically derived. Special emphasis is put on developing hierarchies of approximations for the different systems, and suitable numerical solution techniques are discussed. A separate chapter is devoted to glacial isostasy. The book is appropriate for graduate courses in glaciology, cryospheric sciences, environmental sciences, geophysics and related fields. Standard undergraduate knowledge of mathematics (calculus, linear algebra) and physics (classical mechanics, thermodynamics) provide a sufficient background for successfully studying the text.

Deformation of Glacial Materials

Author: Geological Society of London

Publisher: Geological Society of London


Category: Science

Page: 344

View: 386

The flow of glacier ice can produce structures that are striking and beautiful. Associated sediments too can develop spectacular deformation structures, and examples are remarkably well preserved in Quaternary deposits. This collection of papers addresses how the methods for unravelling deformation structures evolved by structural geologists can be used for glacial materials, and the opportunities offered to structural geologists by glacial materials for studying deformation in rocks.

Ice Composition and Glacier Dynamics

Author: Roland A. Souchez

Publisher: Springer Science & Business Media


Category: Science

Page: 207

View: 191

Ice composition has until now been mostly used for reconstructing the environment of the past. A great research effort is made today to model the climate system in which the ice cover at the earth sur face plays a prominent role. To obtain a correct model of the ice sheets, due attention must be paid to the physical processes operating at the interfaces, i. e. the boundary conditions. The idea behind the title of this book is that the study of ice composition can shed some light on the various processes operating at the ice bedrock and ice-ocean interfaces and more generally on glacier dy namics. The book is not intended as a treatise on some specialized topic of glaciology. It is mainly the product of the experience of the two authors gained over several years research on the subject. The two authors are both members of the same university department and personal friends. The book was prepared in the following way. After a first draft of the complete book had been written by the first author, it was put in the hands of the second. The final version sent to the publishers is therefore the result of ex tended discussion, while at the same time preserving the unity of style that would have been lost had the two authors written selected chapters of the book individually. The book is organized into two distinct parts.

Glacier Fluctuations and Climatic Change

Proceedings of the Symposium on Glacier Fluctuations and Climatic Change, held at Amsterdam, 1–5 June 1987

Author: Johannes Oerlemans

Publisher: Springer Science & Business Media


Category: Science

Page: 420

View: 671

Proceedings of the Symposium on Glacier Fluctuations and Climatic Change, held in Amsterdam, June 1-5, 1987

Earthquakes at North-Atlantic Passive Margins: Neotectonics and Postglacial Rebound

Author: Søren Gregersen

Publisher: Springer Science & Business Media


Category: Science

Page: 716

View: 953

For many years, the two subjects of (1) postglacial rebound and its potential for generating earthquakes and (2) the seismicity of passive continental ml!rgins have been of interest and concern to earth scientists on both sides of the North Atlantic. New data and theoretical interpretations have given rise to vigorous discussions on how much the two phenomena inter-relate and whether a significant controlling factor on seismicity in northeastern North America and Scandinavia is the crustal uplift that has been occurring since the latest ice age. The lack of a good understanding of these phenomena presented a particular problem for engineering seismologists attempting to prepare accurate seismic hazard estimates for facili ties both on land (e. g. , nuclear power stations and radioactive waste repositories) and offshore (e. g. , petroleum production facili ties) . The NATO Advanced Research Workshop programme provided an opportuni ty to bring together a group of relevant geophysicists, geologists and geodesists from both sides of the North Atlantic, and a workshop on "Causes and Effects of Earthquakes at Passive Margins and in Areas of Postglacial Rebound on both Sides of the North Atlantic" was held in Vordingborg, Denmark, 9-13 May 1988. The sup port of the NATO Science Committee is gratefully acknowledged.

Mountain Glaciers of the Northern Hemisphere

Author: American Geographical Society of New York. Dept. of Exploration and Field Research



Category: Glaciers


View: 379

Glacial Environments

Author: M. J. Hambrey

Publisher: UBC Press


Category: Science

Page: 296

View: 278

Enhanced by many photographic illustrations of extraordinaryquality, this textbook will provide students with a completeintroduction to the scientific study of environments dominated by snowand ice. Glacial environments are scenically and scientifically amongthe most exciting on Earth, and at the same time they are among themost complex. Apart from the processes associated directly with movingice, other processes -- fluvial, acolian, lacustrine, and marine --frequently interact with ice. Glacial environments therefore exhibit awide variety of landforms and sediment associations. Today, some ten per cent of the land surface of the Earth is coveredby ice, whereas in the Pleistocene the figure exceeded thirty per cent.In earlier geological history, the Earth underwent glaciations ofcontinent-wide extent on several occasions, some of them even moreintense than those of the Pleistocene. By examining the processesoperating within glacial settings and their resulting products,Glacial Environments provides the foundation for investigationof both the ancient and the modern record. Emphasizing the range of erosional and depositional landforms,drawing on the older geological record, according due attention to theexciting recent developments in research on the marine environment,incorporating illustrations from both contemporary and ancientenvironments and covering all relevant parts of the world, thisattractive book will find a wide readership among students ofgeography, geology and environmental science.

Geological Survey of Canada, Open File 2652


Publisher: Natural Resources Canada




View: 327

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