Earth Flows Along Henry Creek, Northern Alaska

Carter, L. David; Galloway, John P.

doi:10.14430/arctic2537

Cited by 20 publications

(10 citation statements)

References 2 publications

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“…The observed flow-slide appears to provide a physical model of many thaw-related debris flows observed in the field (e.g. Carter and Galloway, 1981;Lyle et al, 2005;Lipovsky et al 2006). 12.…”

Section: Discussionmentioning

confidence: 90%

An investigation of periglacial slope stability in relation to soil properties based on physical modelling in the geotechnical centrifuge

et al. 2008

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Section: Discussionmentioning

confidence: 90%

An investigation of periglacial slope stability in relation to soil properties based on physical modelling in the geotechnical centrifuge

et al. 2008

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“…Given that the heaviest rainfall events of 2018 occurred 6-10 weeks prior to the ALDS, they did not trigger it directly, in contrast to reports at some other locations. 15,30,51 However, precipitation could have temporarily increased the rate of thaw by convective heat transfer 52 contributing to the greater thaw depths later in the season. In addition, rainfall in 2018 and in earlier years could have led to the build-up of ice lenses at the bottom of the still-frozen active layer and in the top permafrost layer.…”

Section: Resultsmentioning

confidence: 99%

Development of a rapid active layer detachment slide in the Fenghuoshan Mountains, Qinghai–Tibet Plateau

Jiang

Gao

Lewkowicz

et al. 2022

Permafrost & Periglacial

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An active layer detachment slide (ALDS) in the interior portion of the Qinghai-Tibet Plateau (QTP) was investigated within 2 days of its formation on September 21, 2018. The ALDS developed on a relatively gentle slope (4.8 to 9 ) at an elevation of 4,850 m above sea level (asl) and was about 145 m long and 45 m wide, with a headscarp 2.2-2.5 m high. Analyses of meteorological data and soil temperatures indicated that it was probably triggered by a record thaw depth which intersected a layer with high ice content at the base of the active layer and in the top of the permafrost. Based on the time window, the minimum downslope velocity of the main slide mass was about 20 m/h which is higher than previously reported values. The ALDS ran into the embankment of the Qinghai-Tibet Railway (QTR) but did not damage the railbed. However, extensive rehabilitation of the slope was needed subsequent to the failure to clear the slide mass and as minor headscarp recession and thaw settlement continued on the slope. In this work, we describe this feature and the most likely mechanisms of development.

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“…ALD initiation is generally associated with warm summers, often in conjunction with heavy rainfall 4,37 . RTS initiation is also generally associated with warm summers 1,11 .…”

Section: Discussionmentioning

confidence: 99%

Permafrost thaw‐related slope failures in Alaska’s Arctic National Parks, c. 1980–2019

Swanson

2021

Permafrost & Periglacial

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Active‐layer detachments (ALD) and retrogressive thaw slumps (RTS) are landslides that occur as a result of thaw in permafrost regions. I mapped the extent of bare soil exposed in these thaw‐related slope failures in four study areas with continuous permafrost in Alaska’s Arctic National Parks, on mosaics of aerial photographs from 1977–1985 (sampling episode 1), satellite images from 2006–2009 (sampling episode 2), and satellite images from 2018–2019 (sampling episode 3). In all four study areas the count of ALD and RTS, and the area of bare soil they exposed, was greater during the first or second sampling episode than the third sampling episode, in spite of record high mean annual temperatures in 2014–2019. One study area had frozen debris lobes (FDL) in addition to ALD and RTS. In that study area the bare ground exposed by destabilization and rapid movement of FDL was greatest in the third sampling episode, probably as a result of deep thaw and talik formation. The destabilization of FDL in episode 3 was probably a long‐term consequence of warming and permafrost loss, while the observed pulses of ALD and RTS in episodes 1 and 2 were closely tied to short‐term deep thaw events in areas where the underlying permafrost remained stable.

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Earth Flows Along Henry Creek, Northern Alaska

Cited by 20 publications

References 2 publications

An investigation of periglacial slope stability in relation to soil properties based on physical modelling in the geotechnical centrifuge

An investigation of periglacial slope stability in relation to soil properties based on physical modelling in the geotechnical centrifuge

Development of a rapid active layer detachment slide in the Fenghuoshan Mountains, Qinghai–Tibet Plateau

Permafrost thaw‐related slope failures in Alaska’s Arctic National Parks, c. 1980–2019

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