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Subglacial Geology In Coats Land East Antarctica Revealed By Airborne Magnetics And Radar Sounding
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Book Synopsis Subglacial geology in Coats Land, East Antarctica, revealed by airborne magnetics and radar sounding by : T. SHEPHERD
Download or read book Subglacial geology in Coats Land, East Antarctica, revealed by airborne magnetics and radar sounding written by T. SHEPHERD and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Exploration of Subsurface Antarctica by : M.J. Siegert
Download or read book Exploration of Subsurface Antarctica written by M.J. Siegert and published by Geological Society of London. This book was released on 2018-01-08 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our appreciation of glaciological processes in Antarctica suffers from a lack of observations in regions where numerical models indicate the ice sheet to be susceptible to ocean and/or atmospheric warming. The solution lies in the use and development of glacier geophysics. In this volume we present a series of papers that demonstrate how geophysics can be deployed in Antarctica to comprehend: (1) boundary conditions that influence ice flow such as subglacial topography, the distribution of basal water and ice-sheet rheology; (2) phenomena that might affect ice-flow processes, such as complex internal ice-sheet structures and the proposition of large stores of hitherto unappreciated groundwater; and (3) how glacigenic sediments and formerly glaciated terrain on, and surrounding, the continent can inform us about past ice-sheet dynamics. The volume also takes a historical view on developments leading to current knowledge, examines active ice-sheet processes, and points the way forward on how geophysics can advance quantitative understanding of Antarctic ice-sheet behaviour.
Book Synopsis Continental Basin and Orogenic Processes: Deep Structure, Tectonic Deformation, and Dynamics by : Hanlin Chen
Download or read book Continental Basin and Orogenic Processes: Deep Structure, Tectonic Deformation, and Dynamics written by Hanlin Chen and published by Frontiers Media SA. This book was released on 2022-11-04 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Italian-British Antarctic Geophysical and Geological Survey in Northern Victoria Land, 2005-06 by : Emanuele Bozzo
Download or read book The Italian-British Antarctic Geophysical and Geological Survey in Northern Victoria Land, 2005-06 written by Emanuele Bozzo and published by Terra Antartica Publication. This book was released on 2007 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evolving Subglacial Water Systems in East Antarctica from Airborne Radar Sounding by : Sasha Peter Carter
Download or read book Evolving Subglacial Water Systems in East Antarctica from Airborne Radar Sounding written by Sasha Peter Carter and published by . This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Antarctic Subglacial Aquatic Environments by : Martin J. Siegert
Download or read book Antarctic Subglacial Aquatic Environments written by Martin J. Siegert and published by John Wiley & Sons. This book was released on 2013-05-02 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt: Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 192. Antarctic Subglacial Aquatic Environments is the first volume on this important and fascinating subject. With its underlying theme of bridging existing knowledge to future research, it is a benchmark in the history of subglacial lake exploration and study, containing up-to-date discussions about the history and background of subglacial aquatic environments and future exploration. The main topics addressed are identification, location, physiography, and hydrology of 387 subglacial lakes; protocols for environmental stewardship and protection of subglacial lake environments; details of three programs aiming to explore Vostok Subglacial Lake, Ellsworth Subglacial Lake, and Whillans Subglacial Lake over the next 3–5 years; assessment of technological requirements for exploration programs based on best practices for environmental stewardship and scientific success; and knowledge of subglacial lakes as habitats for microbial life and as recorders of past climate and ice sheet change. Its uniqueness, breadth, and inclusiveness will appeal to microbiologists and those interested in life in extreme environments, paleoclimatologists and those interested in sedimentary records of past changes, glaciologists striving to understand how water beneath glaciers affects their flow, and those engaged in developing technology to undertake direct measurement and sampling of extreme environments on Earth and in the solar system.
Book Synopsis Bedrock Geology of Antarctica by : United States. Antarctic Projects Office
Download or read book Bedrock Geology of Antarctica written by United States. Antarctic Projects Office and published by . This book was released on 1960 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summary based on published and unpublished reports.
Book Synopsis Geomagnetic Observations and Models by : M. Mandea
Download or read book Geomagnetic Observations and Models written by M. Mandea and published by Springer Science & Business Media. This book was released on 2010-12-10 with total page 351 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides comprehensive and authoritative coverage of all the main areas linked to geomagnetic field observation, from instrumentation to methodology, on ground or near-Earth. Efforts are also focused on a 21st century e-Science approach to open access to all geomagnetic data, but also to the data preservation, data discovery, data rescue, and capacity building. Finally, modeling magnetic fields with different internal origins, with their variation in space and time, is an attempt to draw together into one place the traditional work in producing models as IGRF or describing the magnetic anomalies.
Book Synopsis The Antarctic Subglacial Lake Vostok by : Igor A. Zotikov
Download or read book The Antarctic Subglacial Lake Vostok written by Igor A. Zotikov and published by Springer Science & Business Media. This book was released on 2006-08-31 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first book on the subject, this monograph examines the phenomenon of a huge sealed, freshwater lake, isolated from the rest of the world by kilometers' thick ice. The existence of melting ice at the bottom of the huge Vostok Lake has served as a model and inspired the team planning the Galileo space craft to gather data on the ice sheet of the Jupiterian moon Europa. The book provides interpretation of, and calculations for, stimulating factors for possible melting and a huge lake's existence at the bottom of the Martian ice sheets.
Book Synopsis Marine Geological and Geophysical Investigations of the Antarctic Continental Margin, 1984 by : Stephen Eittreim
Download or read book Marine Geological and Geophysical Investigations of the Antarctic Continental Margin, 1984 written by Stephen Eittreim and published by . This book was released on 1984 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Exploration of Antarctic Subglacial Aquatic Environments by : National Research Council
Download or read book Exploration of Antarctic Subglacial Aquatic Environments written by National Research Council and published by National Academies Press. This book was released on 2007-07-09 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: Antarctica is renowned for its extreme cold; yet surprisingly, radar measurements have revealed a vast network of lakes, rivers, and streams several kilometers beneath the Antarctic ice sheet. Sealed from Earth's atmosphere for millions of years, they may provide vital information about microbial evolution, the past climate of the Antarctic, and the formation of ice sheets, among other things. The next stage of exploration requires direct sampling of these aquatic systems. However, if sampling is not done cautiously, the environmental integrity and scientific value of these environments could be compromised. At the request of the National Science Foundation, this National Research Council assesses what is needed to responsibly explore subglacial lakes. Exploration of Antarctic Subglacial Aquatic Environments concludes that it is time for research on subglacial lakes to begin, and this research should be guided by internationally agreed upon protocols. The book suggests an initial protocol, which includes full characterization of the lakes by remote sensing, and minimum standards for biological and other types of contamination.
Book Synopsis Antarctic Geology by : Raymond John Aide
Download or read book Antarctic Geology written by Raymond John Aide and published by . This book was released on 1964 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geology and Seismic Stratigraphy of the Antarctic Margin by : Alan K. Cooper
Download or read book Geology and Seismic Stratigraphy of the Antarctic Margin written by Alan K. Cooper and published by American Geophysical Union. This book was released on 1997-01-23 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Published by the American Geophysical Union as part of the Antarctic Research Series, Volume 71. The Antarctic Ice Sheet has greatly affected global climate, sea level, ocean circulation, and southern hemisphere biota during Cenozoic times. Much of our understanding of the evolution of the ice sheet has been inferred from isotopic studies on distant deep-ocean sediments, because few Cenozoic rocks are exposed on the Antarctic continent. Yet, large differences occur between past ice volumes inferred from isotopic studies and those inferred from low-latitude sea-level variation. The massive quantities of glacially transported terrigenous sediments that lie beneath the Antarctic continental margin provide an additional, more direct record of the inferred ice sheet fluctuations. Volume 68 addresses the history of ice sheet fluctuations as recorded by geological and geophysical investigations of selected areas of the Antarctic continental margin. As described below, the volume gives data and results from on-going research by a major multinational project directed toward better understanding the impact of Antarctic Ice Sheet fluctuations on global sea levels and climates.
Book Synopsis Characterizing the Subglacial Hydrology of Thwaites Glacier, West Antarctica Using Airborne Radar Sounding by : Dustin Matthew Schroeder
Download or read book Characterizing the Subglacial Hydrology of Thwaites Glacier, West Antarctica Using Airborne Radar Sounding written by Dustin Matthew Schroeder and published by . This book was released on 2014 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrologic, lithologic, and geothermal basal boundary conditions can exert strong, even dominating, control on the evolution, stability, and sea level contribution of ice sheets and glaciers. However, the scales at which the physical processes and observable signatures of this control occur are typically smaller than the spatial resolutions currently achievable using ice penetrating radar. Further, the strength of radar bed echo returns is affected by the material and geometric properties of the bed as well as englacial attenuation from unknown ice temperature and chemistry, making assessment of basal conditions from echo strengths difficult. To address these challenges in interpreting basal properties at glaciologically relevant scales, a new algorithmic approach is applied to measuring the radar scattering function of the bed in terms of the relative contribution of angularly narrow specular energy and isotropically scattered diffuse energy. This relative specularity content is insensitive to englacial attenuation and can be used to constrain the geometry of the bed down to the centimeter scale. This approach is applied to an airborne radar sounding survey of Thwaites Glacier, West Antarctica using the information in the along-track scattering function to assess the extent and geometry of water across the catchment and detect the transition of that water from distributed canals to concentrated channels. This information is also used to constrain the morphology of subglacial bedforms and infer that the distribution of deformable sediments and exposed bedrock is similar to deglaciated paleo ice streams that experienced meltwater intensive retreats. Finally, models of radar echo strength and subglacial water routing are compared to estimate a catchment-wide distribution of geothermal flux consistent with rift-associated magma migration and volcanism. These observations of basal conditions provide new context for the past, current, and future evolution of Thwaites Glacier, the West Antarctic Ice Sheet, and their contribution to global sea level.
Book Synopsis Geology and Seismic Stratigraphy of the Antarctic Margin, 2 by : Peter F. Barker
Download or read book Geology and Seismic Stratigraphy of the Antarctic Margin, 2 written by Peter F. Barker and published by American Geophysical Union. This book was released on 1997-01-23 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt: Published by the American Geophysical Union as part of the Antarctic Research Series, Volume 71. The dominant feature of the modern Antarctic continent is the ice sheet. It strongly influences global climate, through its effects on sea level, albedo and ocean circulation, and provides a record of climate going back (potentially) about 400,000 years. However, it has existed, in one form or another, certainly for 35 million years and probably for longer. Because of the importance of the ice sheet to climate, now and in the past, a major responsibility of global geoscience has been to unravel its history, and understand the processes that have controlled it.
Book Synopsis Geology and Seismic Stratigraphy of the Antarctic Margin by : Alan K. Cooper
Download or read book Geology and Seismic Stratigraphy of the Antarctic Margin written by Alan K. Cooper and published by Wiley-AGU. This book was released on 1997-01-23 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Antarctic Ice Sheet has greatly affected global climate, sea level, ocean circulation, and southern hemisphere biota during Cenozoic times. Much of our understanding of the evolution of the ice sheet has been inferred from isotopic studies on distant deep-ocean sediments, because few Cenozoic rocks are exposed on the Antarctic continent. Yet, large differences occur between past ice volumes inferred from isotopic studies and those inferred from low-latitude sea-level variation. The massive quantities of glacially transported terrigenous sediments that lie beneath the Antarctic continental margin provide an additional, more direct record of the inferred ice sheet fluctuations. Volume 68 addresses the history of ice sheet fluctuations as recorded by geological and geophysical investigations of selected areas of the Antarctic continental margin. As described below, the volume gives data and results from on-going research by a major multinational project directed toward better understanding the impact of Antarctic Ice Sheet fluctuations on global sea levels and climates.
Book Synopsis Antarctica's Geologic and Ice Sheet History from Isotopic Sedimentary Provenance Studies by : Elizabeth Lane Pierce
Download or read book Antarctica's Geologic and Ice Sheet History from Isotopic Sedimentary Provenance Studies written by Elizabeth Lane Pierce and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Within the constraints of uncertainty in the nature of erosion and transport in the sub-glacial environment, the study of glacialy-derived material from marine sediments located off the margin of East Antarctica provides a means for characterizing the sub-glacial geology obscured by the more than 98% ice cover of the continent. These insights into the geology of East Antarctica in turn provide characterization of sedimentary source areas, the knowledge of which can be applied to sediment provenance studies of ice rafted detritus (IRD) and thus about East Antarctic ice sheet history. Much of what has been learned of East Antarctica's Cenozoic ice sheet evolution has been achieved through the study of marine sediments, as ice sheets tend to erode their own history and much of what is preserved is, like the geology, obscured the ice sheet. Determining the provenance of ice-rafted detritus allows for spatial and temporal reconstructions of ice sheet behavior. Accordingly sedimentary provenance studies are key to documenting how Antarctica's ice sheet evolved through the Cenozoic.
