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Effects of permafrost degradation on ecosystems
Acta Ecologica Sinica, 2010Abstract Permafrost, covering approximately 25% of the land area in the Northern Hemisphere, is one of the key components of terrestrial ecosystem in cold regions. As a product of cold climate, permafrost is extremely sensitive to climate change. Climate warming over past decades has caused degradation in permafrost widely and quickly.
Minghua Song, Xingliang Xu
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Highway Embankment on Degrading Permafrost
Cold Regions Engineering 2009, 2009The highway embankment is about 800 km (500 miles) north of Winnipeg, Manitoba, Canada in an area where permafrost is degrading rapidly. Soil sampling and installation of instrumentation (temperatures, settlements, lateral deformations and pore water pressures) was undertaken in October 2008.
H. Batenipour +4 more
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Thaw Responses in Degrading Permafrost
Volume 1: Project Management; Design and Construction; Environmental Issues; GIS/Database Development; Innovative Projects and Emerging Issues; Operations and Maintenance; Pipelining in Northern Environments; Standards and Regulations, 2006The Norman Wells pipeline has operated for over 20 years, transporting crude oil from Norman Wells, Northwest Territories to Zama, Alberta. The pipeline route traverses 869 km of discontinuous permafrost. The stability of the slopes along the route required that rapid thawing of ice-rich permafrost be avoided, lest the high porewater pressures that ...
Jim Oswell, Darren Skibinsky
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Highway embankments on degrading and degraded permafrost
2011Global warming is affecting transportation systems in northern Canada. Thawing permafrost and expanding infrastructure systems require improved designs, construction and maintenance. The paper provides information about sampling, testing, instrumentation, and numerical modelling on two instrumented sections of provincial roads in Northern Manitoba.
Alfaro M.C. +4 more
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Engineering Studies for Degrading Permafrost
Current Practices in Cold Regions Engineering, 2006Polar mean annual air temperatures have been on the rise for the past few decades and are expected to continue to rise (Hassol, 2004). Because of this, mean annual ground temperatures are rising as well, and civil engineering projects in the circumpolar north are at risk due to the possible thawing of their frozen founding soils.
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Permafrost Degradation: Legal Consequences
Ecological LawThis article identifies current problems of permafrost degradation in the context of the emergence of a new sphere of legal regulation, primarily in Russia as a subarctic country. Various legal consequences of this phenomenon, especially those arising outside the sea, on land, are very sensitive to ecosystems and humans. It is proposed to begin solving
Olga M. Kozyr, Elena V. Novikova
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Hazards related to permafrost and to permafrost degradation
2011Rockfalls ( 0.1-1 M m3) can threaten valley inhabitants at very long distance from the source area. Permafrost is present in Alpine rockwalls at high elevation (e.g. above c. 3000 m and 3500 m a.s.l. on north- and south-facing slopes, respectively). Its climatically-driven degradation is probably one of the main triggers of recent, present and future ...
Deline P. (1) +7 more
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Climatic warming and the degradation of warm permafrost
Permafrost and Periglacial Processes, 1996Permafrost—a widespread constituent of the terrestrial environment—by definition is dependent upon the ambient temperature for its existence and properties. Thus, it is very sensitive to climatic changes. Simple relations based upon conductive heat transfer, with thawing and geothermal heat flow, are presented to predict the transient effects of ...
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