Download or read book Radioglaciology written by V.V. Bogorodsky and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: Antarctica, the sixth continent, was discovered more than 160 years ago. Since then this large, mysterious continent of ice and penguins has attracted world interest. Scientific expeditions from various countries have begun to study the geographical and natural conditions of the icy continent. Systematic and comprehensive inves tigations in the Antarctic started in the middle of our century. In 1956 the First Soviet Antarctic Expedition headed to the coast of Antarctica. Their program included studies of the atmosphere, hydrosphere and cryosphere. Thirty years have since passed. Scientists have unveiled many secrets of Antarctica: significant geophysical processes have been investigated, and a large body of new information on the Antarctic weather, Southern Ocean hydrology and Antarctic glaciers has been obtained. We can now claim that the horizons of polar geo physics, oceanology, and particularly glaciology, have expanded. Scientific inves tigators have obtained new information about all Antarctic regions and thus have created the opportunity to use the Antarctic in the interests of mankind.
Download or read book Remote Sensing of Glaciers written by Petri Pellikka and published by CRC Press. This book was released on 2009-12-16 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: Glaciers and ice sheets have been melting significantly during recent decades, posing environmental threats at local, regional and global scales. Changes in glaciers are one of the clearest indicators of alterations in regional climate, since they are governed by changes in accumulation (from snowfall) and ablation (by melting of ice). Glacier chan
Download or read book Radioglaciology 60 MHz Radar written by E. Lintz Christensen and published by . This book was released on 1970 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radioglaciology Side looking Radar Imaging and Depth Soundings of Ice at 300 MHz written by Finn Søndergaard and published by . This book was released on 1976 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Field Techniques in Glaciology and Glacial Geomorphology written by Bryn Hubbard and published by John Wiley & Sons. This book was released on 2005-05-20 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: Field Techniques in Glaciology and Glacial Geomorphology is the first text to provide this essential information in a single comprehensive volume. Coverage includes: The role of field data acquisition in the broader disciplines of glaciology and glacial geomorphology Logistical preparations for fieldwork Field techniques in glaciology such as investigations on ice and meltwaters Field techniques in glacial geomorphology ranging from investigations on glacial landforms and sediments International case studies show each method in practice
Download or read book Passive Radar Sounding for Terrestrial and Planetary Glaciology written by Sean Thomas Peters and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Can ambient radio signals, such as the Sun, be used to monitor the thickness of glaciers? Traditional ice-penetrating radars transmit a powerful electromagnetic pulse and record the echo's delay time and power to measure ice sheet thickness and subsurface conditions. While active radar sounding is the principle remote sensing technique used to observe the subsurface of Greenland and Antarctica, existing radar systems are resource-intensive in terms of cost, power, and logistics when simultaneously monitoring ice sheets at both their evolving temporal (daily to multiannual) and spatial (tributary to continental) scales. However, these observations are critical as ice sheet contribution to sea level rise presents one of the greatest challenges our society faces in the next century. In this dissertation, we address this challenge by developing a novel, low-resource, passive radar sounding technique that uses ambient radio signals from the Sun to observe the subsurface of ice sheets at these spatiotemporal scales, instead of transmitting its own powerful radio signal for echo detection. In this work, we demonstrate for the first time that one can use the Sun as a signal of opportunity to measure ice sheet thickness. Starting from theory, simulation, and lab testing, we first show how one can extract the amplitude and delay time of a received white noise Sun echo. We then describe how this passive radar technique was used to measure ice thickness at Store Glacier, Greenland. We then evaluate the passive radar's performance and ability to provide valuable glaciological observations, such as melt rates, bed reflectivity changes, and englacial water storage-all scientific measurements that have traditionally been obtained using active radar systems but never passively. We then extend this technique to develop a novel passive synthetic aperture radar (SAR) approach that uses astronomical white noise, such as the Sun and Jupiter's radio emissions, as a source for echo detection, ranging, and imaging. We conclude with an analysis of how a passive HF radar could use Jupiter's radio emissions alongside an active VHF radar to correct for the dispersive effects of the ionosphere, estimate Europa's total electron content, and characterize Europa's ionosphere during a flyby mission.
Download or read book Radar Technology written by Guy Kouemou and published by BoD – Books on Demand. This book was released on 2010-01-01 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book “Radar Technology”, the chapters are divided into four main topic areas: Topic area 1: “Radar Systems” consists of chapters which treat whole radar systems, environment and target functional chain. Topic area 2: “Radar Applications” shows various applications of radar systems, including meteorological radars, ground penetrating radars and glaciology. Topic area 3: “Radar Functional Chain and Signal Processing” describes several aspects of the radar signal processing. From parameter extraction, target detection over tracking and classification technologies. Topic area 4: “Radar Subsystems and Components” consists of design technology of radar subsystem components like antenna design or waveform design.
Download or read book The Land Beneath the Ice written by David J. Drewry and published by Princeton University Press. This book was released on 2023-01-24 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: A wondrous story of scientific endeavor—probing the great ice sheets of Antarctica From the moment explorers set foot on the ice of Antarctica in the early nineteenth century, they desired to learn what lay beneath. David J. Drewry provides an insider’s account of the ambitious and often hazardous radar mapping expeditions that he and fellow glaciologists undertook during the height of the Cold War, when concerns about global climate change were first emerging and scientists were finally able to peer into the Antarctic ice and take its measure. In this panoramic book, Drewry charts the history and breakthrough science of radio-echo sounding, a revolutionary technique that has enabled researchers to measure the thickness and properties of ice continuously from the air—transforming our understanding of the world’s great ice sheets. To those involved in this epic fieldwork, it was evident that our planet is rapidly changing, and its future depends on the stability and behavior of these colossal ice masses. Drewry describes how bad weather, downed aircraft, and human frailty disrupt the most meticulously laid plans, and how success, built on remarkable international cooperation, can spawn institutional rivalries. The Land Beneath the Ice captures the excitement and innovative spirit of a pioneering era in Antarctic geophysical exploration, recounting its perils and scientific challenges, and showing how its discoveries are helping us to tackle environmental challenges of global significance.
Download or read book Workshop Proceedings written by World Data Center A for Glaciology and published by . This book was released on 1982 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radioglaciology 300 MHz Radar written by E. Lintz Christensen and published by . This book was released on 1970 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Principles of Glacier Mechanics written by Roger LeB. Hooke and published by Cambridge University Press. This book was released on 2019-12-05 with total page 537 pages. Available in PDF, EPUB and Kindle. Book excerpt: The principles of glacier physics are developed from basic laws in this up-to-date third edition for advanced students and researchers.
Download or read book Radar Methods for the Exploration of Glaciers written by Bernard Owen Steenson and published by . This book was released on 1951 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radar Sounding of Glaciers written by V. V. Bogorodskii and published by . This book was released on 1968 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Impulse radar was used by scientists in the Soviet Antarctic stations to measure the thickness of glaciers. The accuracy of the measurements are discussed, including the effect of the density of the ice on this accuracy. The maximum capabilities of this method of measurement are 1100-3000 meters depending on the amplitude and electromagnetic energy loss in glaciers. The radar can sound the depth of glaciers from an airplane or from the surface of the glacier. In this manner the sub-glacial relief can be mapped. (Author).
Download or read book Spatiotemporal Variations of Englacial Scattering of Radar Within Bench Glacier a Temperate Glacier in Coastal Alaska written by Joel M. Brown and published by . This book was released on 2006 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1976 with total page 802 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Encyclopedia of Snow Ice and Glaciers written by Vijay P. Singh and published by Springer Science & Business Media. This book was released on 2011-07-01 with total page 1301 pages. Available in PDF, EPUB and Kindle. Book excerpt: The earth’s cryosphere, which includes snow, glaciers, ice caps, ice sheets, ice shelves, sea ice, river and lake ice, and permafrost, contains about 75% of the earth’s fresh water. It exists at almost all latitudes, from the tropics to the poles, and plays a vital role in controlling the global climate system. It also provides direct visible evidence of the effect of climate change, and, therefore, requires proper understanding of its complex dynamics. This encyclopedia mainly focuses on the various aspects of snow, ice and glaciers, but also covers other cryospheric branches, and provides up-to-date information and basic concepts on relevant topics. It includes alphabetically arranged and professionally written, comprehensive and authoritative academic articles by well-known international experts in individual fields. The encyclopedia contains a broad spectrum of topics, ranging from the atmospheric processes responsible for snow formation; transformation of snow to ice and changes in their properties; classification of ice and glaciers and their worldwide distribution; glaciation and ice ages; glacier dynamics; glacier surface and subsurface characteristics; geomorphic processes and landscape formation; hydrology and sedimentary systems; permafrost degradation; hazards caused by cryospheric changes; and trends of glacier retreat on the global scale along with the impact of climate change. This book can serve as a source of reference at the undergraduate and graduate level and help to better understand snow, ice and glaciers. It will also be an indispensable tool containing specialized literature for geologists, geographers, climatologists, hydrologists, and water resources engineers; as well as for those who are engaged in the practice of agricultural and civil engineering, earth sciences, environmental sciences and engineering, ecosystem management, and other relevant subjects.
Download or read book Glaciers and the Polar Environment written by Masaki Kanao and published by BoD – Books on Demand. This book was released on 2021-02-24 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Glaciers and Polar regions provide important clues to understanding the past and present status of the Earth system, as well as to predict future forms of our planet. In particular, Antarctica, composed of an ice-covered continent in its center and the surrounding Sothern Ocean, has been gradually investigated during the last half century by all kinds of scientific branches; bioscience, physical sciences, geoscience, oceanography, environmental studies, together with technological components. This book covers topics on the recent development of all kinds of scientific research on glaciers and Antarctica, in the context of currently on-going processes in the extreme environment in polar regions.
