2 edition of Permafrost and ground water in Alaska found in the catalog.
Permafrost and ground water in Alaska
David M. Hopkins
|Statement||by David M. Hopkins, Thor N.V. Karlstrom and others.|
|Series||Professional papers -- 264-F.|
|Contributions||Karlstrom, Thor N V.|
Nov 14, · An international team of researchers led by the National Snow and Ice Data Center (NSIDC), part of CIRES, traveled to Toolik Lake on the North Slope of Alaska to study permafrost dynamics and change. When permafrost thaws, the ice it contains changes to water and the water drains away. If the soil is sufficiently rich in ground ice (present either as pore ice or as massive deposits of nearly clear ice), the thaw can result in a large volume change (loss) which causes the ground to subside and sink.
Dec 10, · The chilling science on Alaska’s melting permafrost. By Up to a quarter of the permafrost that lies just under the ground surface in Alaska as well as other factors like flowing water. Aug 04, · Out on the road, permafrost changed everything. Company A, as it had all the way up from Whitehorse, cleared a path out front. The other companies would use the path to follow, upgrading the path to road as they went. Not in permafrost. The thin surface of dirt and rotted vegetation rested on ice. Clear the surface and the ice melted to water.
Not Available Book Review: Ground water in the permafrost regions of alaska. J. R. WILLIAMS: U.S. Geol. Surv. Prof. Paper , , 83 p. $1. A new permafrost map of Alaska, using a terrain-unit approach for mapping permafrost distribution based on climate and surficial geology is presented in conjunction with the Ninth International Conference on Permafrost held at the University of Alaska, June 29 to July 3, This map.
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Get this from a library. Permafrost and ground water in Alaska. [David Moody Hopkins; Geological Survey (U.S.)] -- "A study of the interralations of permafrost and ground water, and a discussion of the role of aerial photographs in the mapping and evaluation of permafrost conditions.".
Abstract --Introduction --Regional zoination of permafrost --Factors affecting the distribution of permafrost --Factors affecting the distribution of ground water --Permafrost and ground water in some representative areas --Photointerpretation of permafrost conditions.
Series Title. In geology, permafrost is ground, including rock or (cryotic) soil, with a temperature that remains at or below the freezing point of water 0 °C (32 °F) for two or more years. Most permafrost is located in high latitudes (in and around the Arctic and Antarctic regions), but at lower latitudes alpine permafrost occurs at higher universityofthephoenix.com in: International Permafrost Association.
GROUND WATER IN PERMAFROST REGIONS OF ALASKA By JOHN R. WILLIAMS ABSTRACT Although ground water in permafrost regions in Alaska occurs according to the same geologic and hydrologic princi ples prevailing in temperate regions, subfreezing temperaCited by: Aug 23, · Alaska’s permafrost, shown here inis no longer universityofthephoenix.com is starting to thaw.
Bymuch of this frozen ground, a storehouse of ancient carbon, could. Alaska Department of Fish and Game Skip to Main Polygons (pictured to the right) form when soil contraction creates cracks that collect water above the permafrost layer.
This water then freezes and expands, forming ice wedges that force the cracks to widen. permafrost melts and the ground above slumps.
This is called thermokarst. Permafrost and GROUND WATER IN ALASKA: A Shorter Contribution to General Geology: Geological Survey Professional paper F [David M., Thor N.V. Karlstrom, and others Hopkins] on universityofthephoenix.com *FREE* shipping on qualifying universityofthephoenix.com: and others Hopkins, David M., Thor N.V.
Karlstrom. Description: This book provides a general survey of Geocryology, which is the study of frozen ground called permafrost. Frozen ground is the product of cold climates as well as a variety of environmental factors.
Its major characteristic is the accumulation of large quantities of ice which may exceed 90% by volume. Soil water changing to ice. Permafrost is ground that remains frozen longer than two consecutive years. It dominates the landscape in northern Alaska and is found in 10 of Alaska’s 16 national parks.
Permafrost has previously been identified by the Arctic and Central Alaska Networks as a vital to Alaska’s national parks. “ The Global Terrestrial Network for Permafrost Database: metadata statistics and prospective analysis on future permafrost temperature and active layer depth monitoring site distribution ”, Earth System Science Data Discussions, vol.
8, no. 1, pp. -These factors lend special significance to ground water as a water-supply source, even though perennially frozen ground (permafrost) profoundly modifies ground-water flow systems in much of Alaska north of the maritime southern coast and southeastern panhandle areas.
Permafrost is permanently frozen ground that underlies much of the landscape in the Arctic. It affects nearly everything in the Arctic ecosystem, including soils, vegetation, water, and wildlife. During summer months, the top layer of soil thaws creating a wet landscape with rapid runoff.
The name "SYNGEN" (pronounced "sin-JEN") is a shortened version of the word "syngenetic," which is a term used by permafrost enthusiasts (who probably should get out more), to describe a very special kind of permafrost notorious for its unusually high water content and for.
Aug 23, · Much of the permafrost that blankets Alaska and other similarly cold northern regions of the planet is slowly thawing, changing the landscape and affecting the ecosystem in a number of ways.
Permafrost, ground that remains at or below 0 °C for two or more years, underlies about a fifth of the land surface of the Earth. Permafrost terrain consists of an active layer at the surface that freezes and thaws each year, underlain by perennially frozen ground.
Permafrost - Permafrost - Surface manifestations of permafrost and seasonally frozen ground: Many distinctive surface manifestations of permafrost exist in the Arctic and subarctic, including such geomorphic features as polygonal ground, thermokarst phenomena, and pingos.
In addition to the above, there are many features caused in large part by frost action that are common in but not. Permafrost in Alaska and mountain permafrost in the contiguous states forms the physical foundation on which terrestrial ecosystems and infrastructure rest.
Where the permafrost is ice-rich, the potential problems associated with thawing are illustrated in Figures 1, 4, 5, and 8. ground-water and permafrost conditions in some rep resentative areas. This report is a summary of data that have been collected in these areas (pp. ) and of generalizations formulated (pp.
) concern ing the distribution and interaction of permafrost and ground water in Alaska. Aerial photographs are use ful aids in the. Ground Ice Of particular importance in the north is the ground ice often found in permafrost. Of different origins, there are about five types of ground ice, but what is important to know is that the ground can hold more ice than it can unfrozen water.
When the ice melts it causes the ground to sink. When permafrost degrades (melts), there are impacts on drainage, ground water, river runoffs, ecological systems (such as plants and ponds), release of carbon that has been sequestered in the frozen soil, and infrastructure (such as houses, roads, airports, pipelines, and other facilities based on permafrost).
What happens when Alaska’s permafrost isn’t permanent and water samples and embedded temperature probes in the frozen ground. with liquid-filled pipes that transfer heat out of the.The permafrost carbon cycle is a sub-cycle of the larger global carbon cycle.
Permafrost is defined as subsurface material that remains below 0 o C (32 o F) for at least two consecutive years. Because permafrost soils remain frozen for long periods of time, they store large amounts of carbon and other nutrients within their frozen framework during that time.Because of high runoff, a high proportion of groundwater use, and highly variable permeability controlled in part by permafrost and seasonally frozen ground, understanding groundwater/surface.