Download or read book An Investigation of a Perennially Frozen Lake written by David F. Barnes and published by . This book was released on 1960 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Investigation of a Perennially Frozen Lake written by David Fitz Barnes and published by . This book was released on 1960 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: Perennially-frozen Angiussaq Lake, Greenland was examined in 1957 to determine the strength of its midsummer ice cover and the causes of its perennially-frozen conditions. The lake, largest within a 100-mi radius of Thule Air Base, is formed by ice-cap damming of a valley 200 m deep, and has an elevation of 590 m. Water temperatures ranged from 0.1 to 0.7 C and showed that summertime mixing is sufficient to maintain nearly isothermal conditions. Fish, phytoplankton, AND CHIRONOMID LIFE WERE FOUND IN THE LAKE WATER. At the end of the 1957 summer, more than 90% of the lake surface was covered by ice averaging 1.5 m in thickness. Variations in melting rate have caused a gently rolling surface that might be smoothed by flooding or scraping. In-place cantilever beam tests showed that the upper half meter of ice had almost no strength but that the lower portion maintained sufficient strength to support heavy loads throughout the summer. A tongue of glacier ice floating in the lake has a thickness of about 100 m and a length of about 3 km. Five smaller ice islands have thicknesses of more than 5 m and are believed to form where snow accumulation exceeds ablation. (Author).
Download or read book An Investigation of a Perennially Frozen Lake written by David F. Barnes and published by . This book was released on 1960 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research Reports written by and published by . This book was released on 1961 with total page 1216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Air Force Surveys in Geophysics written by and published by . This book was released on 1960 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Abstract Bulletin written by Defense Documentation Center (U.S.) and published by . This book was released on 1961-07 with total page 1766 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fracture of Lake and Sea Ice written by Wilford Frank Weeks and published by . This book was released on 1969 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: The increased activity in cold regions has made a thorough understanding of fracture in lake and sea ice quite desirable, inasmuch as this information has application to a number of problems of geophysical as well as engineering importance. This survey starts with a discussion of the structure of ice I and the macro- and microstructure of sea and lake ice as well as their chemistry and phase relations. Recent work on the direct observation of dislocations as well as the formation of cracks in ice is summarized. Formal ice-brine-air models for analyzing variations in ice strength are also reviewed. The results of the different types of tests are discussed and compared (compressive, indentation, direct and ring-tension, small beam flexure and in situ cantilevers and simple beams, shear, and impact). Scale effects are considered as well as the rapid strength deterioration experienced by ice sheets in the spring. Finally, a number of recommendations are made concerning future research in this field. (Author).
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 1956 with total page 1010 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Long term Environmental Change in Arctic and Antarctic Lakes written by Reinhard Pienitz and published by Springer Science & Business Media. This book was released on 2005-05-03 with total page 579 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concerns about the effects of global climate change have focused attention on the vulnerability of circumpolar regions. This book offers a synthesis of the spectrum of techniques available for generating long-term environmental records from circumpolar lakes.
Download or read book Polar Lakes and Rivers written by Warwick F. Vincent and published by OUP Oxford. This book was released on 2008-09-11 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first book to describe the ecology of high latitude lakes, rivers and glacial environments in both the North and South polar regions. From the lake-rich floodplains of the Arctic to the deep, enigmatic waters of Lake Vostok, Antarctica, these regions contain some of the most extraordinary aquatic ecosystems on Earth. They provide a fascinating diversity of habitats for plant, animal and microbial communities, and are proving to be valuable model systems for exploring many ecological themes including landscape-lake interactions, adaptation of life to environmental extremes, and controls on the structure and functioning of aquatic ecosystems. Some of these waters also have direct global implications, including permafrost thaw lakes as sources of greenhouse gases, subglacial aquatic environments as a storehouse of ancient microbes, and Arctic rivers as major inputs of freshwater and organic carbon to the World Ocean. Given that many polar areas are experiencing greater climate warming than at lower latitudes, these ecosystems can also be viewed as sentinels of global change. This timely volume brings together many of the world's leading researchers in polar limnology to describe these diverse aquatic environments and their ecology. It introduces each major ecosystem type, examines the similarities and differences between Arctic and Antarctic systems as well as their responses to environmental change, and describes new frontiers for future research. A glossary of terms is provided for non-specialists, and a set of colour plates introduces the ecosystems and their biota. Polar Lakes and Rivers will be of value to students and specialist researchers alike, as well as to those with a more general interest in aquatic ecology, polar environments or global change who require an authoritative overview of this fast emerging topic.
Download or read book An Investigation of Symbol Coding for Weather Data Transmission written by Philip I. Hershberg and published by . This book was released on 1960 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Arctic Bibliography written by Arctic Institute of North America and published by . This book was released on 1963 with total page 1522 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies of Detonations at Ionospheric Altitudes Under Project Red Lamp written by N. W. Rosenberg and published by . This book was released on 1965 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography on Snow Ice and Permafrost with Abstracts written by and published by . This book was released on 1962 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography of AFCRL In house Technical Reports written by Air Force Cambridge Research Laboratories (U.S.) and published by . This book was released on 1967 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: The bibliography of AFCRL in-house technical reports lists all reports issued in the existing series. In addition, appendices list reports issued from 1962 to 1964 when series designations were not used, and reports issued in now-defunct series.
Download or read book Summary Report Project Ice Way written by William David Kingery and published by . This book was released on 1962 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Air Force Surveys in Geophysics written by Air Force Cambridge Research Laboratories (U.S.). Geophysics Research Directorate and published by . This book was released on 1961-12 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
