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Journal Article
Journal: Geology
Published: 01 June 2016
Geology (2016) 44 (6): 439-442.
... is necessary to assess the linkages of thermokarst processes with climate variability. We analyzed sediment cores from two lakes on the Alaskan North Slope (USA), one with (Lake NE14) and one without (Perch Lake) watershed thermo-erosion. Distinct geochemical and lithological characteristics provide evidence...
FIGURES
Journal Article
Journal: Geosphere
Published: 01 April 2016
Geosphere (2016) 12 (2): 632-643.
...Zhanju Lin; Jing Luo; Fujun Niu AbstractThe thermal influence of a thermokarst lake on permafrost in the Beiluhe Basin of the Qinghai-Tibet Plateau was examined over nearly 10 yr (2006–2014), and lake development involved both downward and lateral heat transfers. Downward heat transfer rapidly...
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Journal Article
Published: 17 May 2012
Canadian Journal of Earth Sciences (2012) 49 (8): 979-986.
... channel. Areas proximal to the gully were characterized by thermokarst terrain. The gully was initiated in 1999, and the location of the first sinkhole is indicated by a red circle on Fig. 3 . The gully then progressed simultaneously in opposite directions ( Fig. 3 ), with 390 m of gullying development...
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Series: GSA Special Papers
Published: 01 December 2011
DOI: 10.1130/2011.2483(12)
Series: GSA Special Papers
Published: 01 December 2011
DOI: 10.1130/2011.2483(13)
Published: 01 January 2009
DOI: 10.1130/2009.monitoring(09)
EISBN: 9780813759432
... recommended that an expert in permafrost studies be made part of any monitoring team from the beginning to provide advice, training, help with the experimental design, and help with the many facets of site selection. Figure 8. Aerial photographs illustrating the most common types of thermokarst terrain...
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Journal Article
Published: 31 January 2008
Canadian Journal of Earth Sciences (2008) 45 (1): 31-43.
.... Ground temperatures increased since 2000, most likely because of underground warming owing to groundwater flow around the permafrost body. As a result, the mound has started to settle down, and an incipient thermokarst pond became conspicuous in 2003. Six boreholes dedicated to permanent instrumentation...
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Journal Article
Journal: Geology
Published: 01 July 2007
Geology (2007) 35 (7): 583-586.
...J.C. Mars; D.W. Houseknecht AbstractA new quantitative coastal land gained-and-lost method uses image analysis of topographic maps and Landsat thematic mapper short-wave infrared data to document accelerated coastal land loss and thermokarst lake expansion and drainage. The data span 1955–2005...
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Series: GSA Special Papers
Published: 01 January 2007
DOI: 10.1130/2007.2426(07)
... suggests that thermokarst and nearshore processes are critical in altering the development of permafrost in the submarine environment. Permafrost is widely distributed today in the Arctic regions and occupies ∼25% of the land areas in the Northern Hemisphere ( Brown et al., 1998...
Journal Article
Published: 01 October 2004
Journal of Foraminiferal Research (2004) 34 (4): 249-257.
... Advanced Science Institutes, Ser. C, Mathematical and Physical Sciences , v. 327 , p. 783 –791. D allimore , A., 1998 , Holocene environmental history of thermokarst lakes on Richards Island, Northwest Territories, Canada: Thecamoebians as paleolimnological indicators: Ph.D. Dissertation, Carleton...
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Journal Article
Published: 08 October 2003
Canadian Journal of Earth Sciences (2003) 40 (10): 1393-1404.
.... Waves and tidal currents are mainly responsible for the evacuation and transport of thermokarst-produced silts and clays from the shore into the marine basin. No changes could be detected over segments totalling 8 km of the surveyed shoreline. This was the case of some steep rock faces where lateral...
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Journal Article
Published: 20 November 2002
Canadian Journal of Earth Sciences (2002) 39 (11): 1657-1674.
... with the measured uplift of the lake bed. The rate of growth of aggradational ice has been ∼0.5 cm a–1 over 20 years. Lake Illisarvik, prior to drainage, was a thermokarst lake that had been enlarging for thousands of years, primarily by shoreline transgression across bordering terraces with ice-wedge polygons...
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Journal Article
Published: 11 January 2002
Canadian Journal of Earth Sciences (2002) 39 (1): 95-111.
... that the adjacent permafrost had moved upward, relative to the wedge, from thermal expansion during the warming period. The western Arctic coast (Fig.  1 ) is an area of continuous permafrost whose thickness generally exceeds 400 m. Innumerable lakes, many of thermokarst origin, cover 20–40% of the area. Unfrozen...
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Journal Article
Published: 11 April 2001
Canadian Journal of Earth Sciences (2001) 39 (4): 505-518.
.... The shallow-water platform of the delta shows a thin surficial unit of wave-worked sand that overlies fine-grained, deeper water deposits derived from erosion of clay soils in the river catchment a few centuries ago, probably during periods of intense thermokarst activity. As the isostatic uplift continues...
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Journal Article
Published: 01 April 2000
Canadian Journal of Earth Sciences (2000) 37 (1): 63-80.
... paleoenvironmental changes induced by the transgression of the Beaufort Sea during successive periods of lacustrine conditions, breaching and flooding of thermokarst lakes by the sea, and the landward migration of sandy spits. Based on radiocarbon dates and quantitative paleodepth determinations, a relative sea...
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Journal Article
Published: 01 November 1999
Canadian Journal of Earth Sciences (1999) 36 (7): 1227-1238.
..., ground ice content is generally low, as suggested by lack of thermokarst and other permafrost features. However, distinctive surface relief in hummocky till including kettle depressions, rim-ridges, and shallow thaw flowslides may be attributed to massive ice, resulting in sensitive till terrain...
Journal Article
Published: 01 July 1997
Canadian Journal of Earth Sciences (1997) 34 (7): 912-925.
... layer 2.5 times thicker than at present. Numerous thermokarst-lake basins formed in the preceding millennia. Both the botanical and cryostratigraphic indices described are products of summer conditions. Previous reconstructions of early Holocene climate have not assessed the significance of paleocoastal...
Journal Article
Published: 01 January 1997
Canadian Journal of Earth Sciences (1997) 34 (1): 17-33.
Journal Article
Published: 01 January 1996
Journal of Sedimentary Research (1996) 66 (1): 17-25.
... wedges, continued as sand wedges, were modified by thermokarst, and, in some cases, recommenced at a stratigraphically higher level as ice wedges. The sand-wedge and ice-wedge stages reflect environmental change from cold, arid, and windy proglacial conditions during Oxygen Isotope Stage 2 to warmer...
Journal Article
Published: 01 January 1996
Canadian Journal of Earth Sciences (1996) 33 (1): 62-71.
... in the Holocene, probably due to widespread development of thermokarst lakes. At sites 8–12 km from the coast, the present subaerial conditions were established 0.5–1.5 ka through lake drainage and fluvial–deltaic deposition. Dans la région de Mackenzie–Beaufort, l'épaisseur maximale du pergélisol est de 750 m...