Book Description
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. ... Read more

Book Description
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

Book Description
This digital document is a journal article from Quaternary Science Reviews, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
The last ice sheet over the British Isles, together with other mid-latitude Pleistocene ice sheets, and in contrast to the modern ice sheets of Greenland and Antarctica, had a relatively low profile, low summit elevation and extensive, elongated lobes at its margin. A thermo-mechanically coupled numerical ice sheet model, driven by a proxy climate, has been used to explore the properties that would have permitted these characteristics to develop. The approach, the key to quantitative palaeoglaciology, is to determine the boundary conditions that permit the simulated ice sheet to mimic the evolution of the real ice sheet through the last glacial cycle. Simulations show how a British ice sheet may have been confluent with a Scandinavian ice sheet during some parts of its history and how unforced periodic and asynchronous oscillations could occur in different parts of its margins. Marginal lobes are a reflection of streaming within the ice sheet. Such streams can be ephemeral, dynamic streams located because of ice sheet properties, or fixed streams whose location is determined by bed properties. The simulations that best satisfy constraints of extent, elevation and relative sea levels are those with major fixed streams that strongly draw down the ice sheet surface. In these, the core upland areas of the ice sheet were cold based at the Last Glacial Maximum, basal streaming velocities were between 500 and 1000ma^-^1 compared with surface velocities of 10-50ma^-^1 in inter-stream zones, shear stresses were as low as 15-25kPa in streams compared with 70-110kPa in upland areas and 60-84% of the ice flux was delivered to the margin via streams. ... Read more