1-20 OF 34 RESULTS FOR

thermokarst

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Article
Published: 01 May 2023
Russ. Geol. Geophys. (2023) 64 (5): 571–581.
... deflation ( Yang et al., 2004 ). The areas of deflation and thermokarst are locally subject to modern aeolian deposition which produces dunes and barchans, as well as semi-stabilized or non-stabilized sand and loess cover ( Dong et al., 2017 ). Unit I (0–45 cm): poorly sorted reddish-brownish dense...
FIGURES | View All (5)
Journal Article
Published: 01 June 2020
Journal of Environmental and Engineering Geophysics (2020) 25 (2): 199–209.
... of interior Alaska, including thermokarst bog, forested permafrost plateau, and a rich fen. The results show how vegetation reflects shallow (0–10 m depth) permafrost distribution. Additionally, we saw shallow (0–3 m depth) low resistivity areas in forested permafrost plateau potentially indicating...
FIGURES | View All (9)
Journal Article
Journal: Geophysics
Published: 01 April 2019
Geophysics (2019) 84 (3): EN33–EN45.
...., 2016 ). Lakes that are initiated by permafrost thaw and subsidence are known as “thermokarst lakes,” and a zone of thaw expanding below a thermokarst lake is known as a “talik.” Taliks may also form below nonthermokarst water bodies, or independent of lake systems (i.e., terrestrial settings...
FIGURES | View All (8)
Published: 01 January 2019
DOI: 10.1144/SP467.7
EISBN: 9781786203625
... & Gallagher 2009 ; Gallagher et al. 2011 ). This complex includes: (1) gelifluction-like lobes; (2) patches of surface polygonization, possibly underlain by ice wedges and formed by thermal-contraction cracking; and (3) shallow, rimless and polygonized basins morphologically akin to alases (thermokarst...
FIGURES | View All (11)
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 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...
FIGURES | View All (11)
Journal Article
Published: 17 May 2012
Canadian Journal of Earth Sciences (2012) 49 (8): 979–986.
... to gully inception and development in permafrost. The term “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...
FIGURES | View All (8)
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. The eikonal equations appear in many applications, such as optimal...
FIGURES | View All (4)
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
... Table 1. A Terrain Classification for Assessing Geomorphic Changes Associated with Thermokarst Code Geomorphic Unit Code Macrotopography Code Microtopography Bx Bedrock—undifferentiated C Crest N Nonpatterned Bxr Bedrock, residual soil FH...
FIGURES | View All (12)
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...
FIGURES | View All (12)
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...
FIGURES | View All (4)
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. INTRODUCTION 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...
FIGURES
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. Corresponding author (email: m.allard@cen.ulaval.ca ) 18 11 2002 3 6 2003 © 2003 NRC Canada 2003 Une analyse...
FIGURES | View All (8)
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. Corresponding author (e-mail: crburn@ccs.carleton.ca ). 1 Polar Continental Shelf Project Contribution 04001. Lake Illisarvik, prior to drainage, was a thermokarst lake that had...
FIGURES | View All (20)
Journal Article
Published: 11 January 2002
Canadian Journal of Earth Sciences (2002) 39 (1): 95–111.
... pergélisol adjacent s’était déplacé vers le haut en raison de l’expansion thermique durant la période de 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...
FIGURES | View All (27)
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...
FIGURES | View All (16)