Download or read book Gas Inclusions in the Antarctic Ice Sheet and Their Significance written by Anthony J. Gow and published by . This book was released on 1975 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cores obtained to the bottom of the Antarctic Ice Sheet at Byrd Station were used to analyze the physical properties of air bubbles trapped in the ice. Parameters measured were the sizes, shapes, abundances, spatial distributions, gas volumes and pressure of bubbles, and their variations with depth in the ice sheet. Bubbles occur abundantly in the top 800 m of ice but then gradually disappear until they can no longer be detected optically below 1100 m. This disappearance is not accompanied by any significant loss of air from the ice and all available evidence indicates that the air actually diffuses into the ice in response to increasing overburden pressure. Bubble pressure measurements show that (1) bubbles with pressures exceeding about 16 bars begin to relax back to this value soon after in situ pressures are relieved by drilling, (2) further slow decompression occurs with time, and (3) the rate of decompression is controlled to some extent by the intrinsic structural properties of the ice and its thermal and deformational history. Only small variations were observed in the entrapped air content of the ice cores; they probably reflect variations in the temperature and/or pressure of the air at the time of its entrapment, but the data are not sufficient to draw any firm conclusions regarding past variations in ice sheet thickness. Only ice from the bottom 4.83 m was found to lack any detectable trace of air.
Download or read book Gas Inclusions in the Antarctic Ice Sheet and Their Significance written by Anthony J. Gow and published by . This book was released on 1975 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cores obtained to the bottom of the Antarctic Ice Sheet at Byrd Station were used to analyze the physical properties of air bubbles trapped in the ice. Parameters measured were the sizes, shapes, abundances, spatial distributions, gas volumes and pressure of bubbles, and their variations with depth in the ice sheet. Bubbles occur abundantly in the top 800 m of ice but then gradually disappear until they can no longer be detected optically below 1100 m. This disappearance is not accompanied by any significant loss of air from the ice and all available evidence indicates that the air actually diffuses into the ice in response to increasing overburden pressure. Bubble pressure measurements show that (1) bubbles with pressures exceeding about 16 bars begin to relax back to this value soon after in situ pressures are relieved by drilling, (2) further slow decompression occurs with time, and (3) the rate of decompression is controlled to some extent by the intrinsic structural properties of the ice and its thermal and deformational history. Only small variations were observed in the entrapped air content of the ice cores; they probably reflect variations in the temperature and/or pressure of the air at the time of its entrapment, but the data are not sufficient to draw any firm conclusions regarding past variations in ice sheet thickness. Only ice from the bottom 4.83 m was found to lack any detectable trace of air.
Download or read book Fluid inclusions written by Edwin Roedder and published by Walter de Gruyter GmbH & Co KG. This book was released on 2018-12-17 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume 12 of Reviews in Mineralogy introduces to fluid inclusions. It covers the folowing questions: when and where inclusions form. how they change, how to prepare material and make microthermometric measurementsl, how to interpret these data, and what has been found in applications of fluid-inclusion studies to each of a series of different geologic environments. This book also attempts to discuss the many applications of fluid inclusions to the study of and understanding of geologic processes and the geologic environments in which they acted.
Download or read book Technical Report written by Cold Regions Research and Engineering Laboratory (U.S.) and published by . This book was released on 1979 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1976 with total page 1814 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Physics of Glaciers written by W. S. B. Paterson and published by Elsevier. This book was released on 2016-10-27 with total page 491 pages. Available in PDF, EPUB and Kindle. Book excerpt: This updated and expanded version of the second edition explains the physical principles underlying the behaviour of glaciers and ice sheets. The text has been revised in order to keep pace with the extensive developments which have occurred since 1981. A new chapter, of major interest, concentrates on the deformation of subglacial till. The book concludes with a chapter on information regarding past climate and atmospheric composition obtainable from ice cores.
Download or read book CRREL Technical Publications written by Cold Regions Research and Engineering Laboratory (U.S.) and published by . This book was released on 1981 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1976 with total page 1072 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research Report Corps of Engineers U S Army Cold Regions Research and Engineering Laboratory written by Cold Regions Research and Engineering Laboratory (U.S.) and published by . This book was released on with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The EPICA DML Deep Ice Core written by Sérgio Henrique Faria and published by Springer. This book was released on 2017-09-20 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: The line-scan images collected in this book represent the most accurate optical record of Antarctic ice cores ever presented, providing an invaluable resource for glaciologists and climate modellers, as well as a fascinating compilation of ice core images for Antarctica enthusiasts. Global warming and the Earth’s past climate are the two main reasons for extracting deep ice cores from Antarctica. Indeed, dust particles, aerosols and other climatic traces deposited on the snow surface, as well as the air trapped in bubbles by compacted snow, produce chronologically ordered strata, making the ice from Antarctica the most accurate and valuable archive of the Earth’s climate over the last million years. In addition, the layered structure produced by these strata, when revealed by appropriate methods, provides indispensable information concerning the flow and mechanical stability of the Antarctic ice sheet, allowing us to assess the current and future impact of global warming on the melting of polar ice caps with much greater precision.
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1976 with total page 1212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physics of Ice written by Victor F. Petrenko and published by OUP Oxford. This book was released on 1999-08-19 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ice is one of the most abundant and environmentally important materials on Earth, and its unique and intriguing physical properties present fascinating areas of study for a wide variety of researchers. This book is about the physics of ice, by which is meant the properties of the material itself and the ways in which these properties are interpreted in terms of water molecules and crystalline structure. Although ice has a simple crystal structure its hydrogen bonding results in unique properties, which continue to be the subject of active research. In this book the physical principles underlying the properties of ice are carefully developed at a level aimed at pure and applied researchers in the field. Important topics like current understandings of the electrical, mechanical, and surface properties, and the occurrence of many different crystalline phases are developed in a coherent way for the first time. An extensive reference list and numerous illustrations add to the usefulness and readability of the text.
Download or read book The Climatic Record in Polar Ice Sheets written by Gordon de Q. Robin and published by Cambridge University Press. This book was released on 2010-06-24 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: This multi-author work examines the glacial geology; measurement; temperature; and the climatic record from ice cores and other topics.
Download or read book Rheological Implications of the Internal Structure and Crystal Fabrics of the West Antarctic Ice Sheet as Revealed by Deep Core Drilling at Byrd Station written by Anthony Jack Gow and published by . This book was released on 1976 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report on United States Antarctic Research Activities written by National Research Council (U.S.). Polar Research Board and published by National Academies. This book was released on 1976 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Antarctic Journal of the United States written by and published by . This book was released on 1997 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ice Cores written by and published by . This book was released on 1980 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
