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thermokarst

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Journal Article
Journal: Geophysics
Published: 01 April 2019
Geophysics (2019) 84 (3): EN33–EN45.
... sensed lake ice conditions is unreliable. We applied a scheme to subtract the lake water signal from the NMR data and found the resulting inversions to be improved. Active-source geophysical measurements have been used for a variety of investigations of thermokarst lake talik properties and geometry...
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Published: 01 January 2019
DOI: 10.1144/SP467.7
EISBN: 9781786203625
... morphologically akin to alases (thermokarst basins), all of which could have been formed in the relatively recent past. By means of this conciliation we intend to deduce and then ascribe, albeit indirectly, a wet origin to the gully-like landforms. Our study region encompasses the Hale Crater’s rim slopes...
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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...
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Journal Article
Journal: Geosphere
Published: 01 April 2016
Geosphere (2016) 12 (2): 632–643.
...Zhanju Lin; Jing Luo; Fujun Niu Abstract The 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.
... “thermo-erosion gully” is used here to distinguish the distinct genesis of gullies in permafrost terrain. This paper focuses on thermo-erosional gully development. Such gullying induces the formation of thermo-erosional and thermokarst landforms. These landforms change over time, with some stabilizing...
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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)
Journal Article
Journal: The Leading Edge
Published: 01 November 2011
The Leading Edge (2011) 30 (11): 1304–1312.
... m) comprising high-velocity and low-velocity areas associated with thermokarst lakes. Our results show the potential of the joint tomography in characterizing multiscale heterogeneous velocity structures within the permafrost. Corresponding author: junwei.huang@vibrometric.com Society...
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Journal Article
Journal: Geology
Published: 01 January 2010
Geology (2010) 38 (1): 71–74.
.... Putative thermokarst depressions identified on Mars are widely considered to be the result of sublimation, evaporation, or thawing of an ice-rich substrate. The possibility that the depressions formed by melting of permafrost to create alas-like lakes has been recently proposed, but is controversial, owing...
FIGURES
Published: 01 January 2009
DOI: 10.1130/2009.monitoring(09)
EISBN: 9780813759432
... Figure 8. Aerial photographs illustrating the most common types of thermokarst terrain in Alaska. Clockwise from upper left, these include: (1) thermokarst lake on the Innoko Flats; (2) glacial thermokarst lake on the Muldrow glacier moraine; (3) collapse-scar fen on the Tanana...
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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. Corresponding author (e-mail: fabricecalmels...
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Journal Article
Journal: Geology
Published: 01 July 2007
Geology (2007) 35 (7): 583–586.
...J.C. Mars; D.W. Houseknecht Abstract A 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. Due to the low topographic gradient of the Laptev and East Siberian Sea shelves, changes in sea level have affected a region extending over 700 km from...
Journal Article
Published: 01 October 2004
Journal of Foraminiferal Research (2004) 34 (4): 249–257.
.... (eds.), Paleoecology, Biostratigraphy, Paleoceanography and Taxonomy of Agglutinated Foraminifera: NATO 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...
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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. Surveys carried out in the early 1980s in Manitounuk Strait, along the eastern Hudson Bay coast ( Moffet 1987 ), and continued in the 1990s...
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Journal Article
Published: 20 November 2002
Canadian Journal of Earth Sciences (2002) 39 (11): 1657–1674.
.... 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 ( Michel et al. 1989 ). Wave-eroded surface peat, which averaged about 20 cm in thickness, contributed...
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Journal Article
Published: 11 January 2002
Canadian Journal of Earth Sciences (2002) 39 (1): 95–111.
... réchauffement. [Traduit par la Rédaction] 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 basins underlie the lake bottoms, where water depths exceed...
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Journal Article
Published: 11 April 2001
Canadian Journal of Earth Sciences (2002) 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...