Soil macropore networks derived from X-ray computed tomography in response to typical thaw slumps in Qinghai-Tibetan Plateau, China

Yang, Zhi-Guang; Hu, Xia; Li, Xiaoyan; Gao, Zhou; Zhao, Yun‐Duo

doi:10.1007/s11368-021-02983-2

Cited by 14 publications

(9 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Soil near the headwall overturns and slumps, resulting in mixed soil of the active layer, changing the composition and chemical properties of organic matter in the active layer, varying the soil bacterial colonies, and speeding up the decomposition rate of organic carbon by soil microorganisms, which increases the amount of greenhouse gases released into the atmosphere 157 . With the shift in hydrological circumstance, the organic matter and minerals dissolved in the RTS process are transported and relocated, which improves denitrification capability and methane emissions 32 . According to long‐term field monitoring, the ecosystem within the region is changing from a carbon sink to source, even though the area of RTSs is limited 29,30 .…”

Section: Engineering and Environmental Influences And Mitigation Of Rtssmentioning

confidence: 99%

“…More importantly, RTSs lead to permafrost degradation and carbon emissions, releasing carbon preserved in permafrost. This leads to changes in regional ecosystems and positively feeds back to climate warming 29–33 . In addition, the mudflow material formed by RTSs flows downward and buries permafrost roadbeds and other infrastructure.…”

Section: Introductionmentioning

confidence: 99%

“…This leads to changes in regional ecosystems and positively feeds back to climate warming. [29][30][31][32][33] In addition, the mudflow material formed by RTSs flows downward and buries permafrost roadbeds and other infrastructure.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Advances in retrogressive thaw slump research in permafrost regions

Li,

Liu,

Chen

et al. 2024

Permafrost & Periglacial

View full text Add to dashboard Cite

A retrogressive thaw slump (RTS) is a slope failure formed by slope thaw settlement and retrogressive slump following the thawing of ice‐rich permafrost or the melting of massive ice. Here, we review recent literature on RTSs, one of the main geomorphological landscapes developed in the process of permafrost degradation. The main topics are as follows: development and temporal evolution, mechanisms and processes, influencing factors, evaluation susceptibility and calculation, and assessment of engineering and environmental impacts. There has been a rapid increase in the number and distribution area of RTSs over permafrost in recent years. Climate warming events, extreme rainfall, forest fires, bank and coast erosion, and anthropogenic activity are the primary factors leading to RTSs in permafrost regions, disrupting the initial hydrothermal equilibrium of permafrost slopes. This causes a rise in ground temperature and the thaw of ice‐rich permafrost. Meltwater seeps down and collects on the ice surface, weakening freeze–thaw interface shear resistance and resulting in soil collapse. The development of RTSs may last several decades or longer. RTSs destabilize infrastructure, destroy vegetation, boost soil erosion and land desertification, alter the environment of nearby waters, and increase emissions of some major greenhouse gases. Numerous methods have been developed and adopted to explore RTSs, including geographic information systems (GIS) and equilibrium, numerical, and reliability analysis methods. However, research on formation mechanisms and processes, quantitative prediction, engineering and environmental influences, and mitigative measures of RTSs under a warming climate are still inadequate. Existing research methods, such as numerical simulations, remote sensing, airborne ground‐based geophysical surveys, investigations and mapping, and hydrothermal and deformation field monitoring, should be systematically integrated. Additionally, equipment for laboratory testing and numerical models for simulating RTSs may need to be timely introduced and better developed.

show abstract

Section: Engineering and Environmental Influences And Mitigation Of Rtssmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Advances in retrogressive thaw slump research in permafrost regions

Li,

Liu,

Chen

et al. 2024

Permafrost & Periglacial

View full text Add to dashboard Cite

show abstract

“…Thermokarst landforms are a kind of varying terrain attributed to the ice‐rich permafrost thawing or the massive ground ice ablation (Jorgenson, 2013). And the freeze–thaw erosion (FTE) impacts are sharply increasing due to terrain‐altering thermokarst, and retrogressive thaw slump (RTS) is most dramatic shown by the recent acceleration of this variation in the Arctic and the Qinghai–Tibet Plateau (QTP) (Bernhard et al, 2022; French, 2017; Lewkowicz & Way, 2019; Luo et al, 2019; Yang et al, 2021). Moreover, the main responses of FTE are the thickening of the active layer, the decrease of soil strength, and the increase of soil pore water stress.…”

Section: Introductionmentioning

confidence: 99%

“…The previous studies were mainly from the perspective of the cryogenic (periglacial) landform processes, which focused on the description of the phenomenon and the qualitative analysis of the possible causes. Two common methods of RTS assessing were the qualitatively describing the development of the geomorphology (Luo et al, 2019; Swanson, 2021) and monitoring data analysis of ground temperature and soil parameters (Niu et al, 2016; Y. Wang et al, 2018; Yang et al, 2021) in a RTS area. On the other hand, with the continuous development of imaging and sensing technology in recent decades, methods of remote sensing are being used to map and quantify the evolution of RTSs.…”

Section: Introductionmentioning

confidence: 99%

Quantifying the effect of a retrogressive thaw slump on soil freeze–thaw erosion in permafrost regions on the Qinghai–Tibet Plateau, China

et al. 2023

View full text Add to dashboard Cite

Thermokarst terrain is developing at an accelerating pace in the ice‐rich permafrost on the Qinghai–Tibet Plateau (QTP), China, and the most dramatic of these terrain‐altering thermokarsts is retrogressive thaw slump (RTS). The freeze–thaw erosion (FTE) impacts are sharply increasing on the Plateau due to RTS, especially as a result of the migration of fine sediments in cold climates, these impacts are still not quantified due to the limitation of hydro‐thermal‐mass transport laws in RTS development. Moreover, it is difficult to assess the impact of RTS on the ecology and environment, especially on soil erosion. This study developed a heat–water‐mass transport coupled model of a RTS in the Beiluhe River Region on the QTP, considering the actual topography, water‐ice phase change, latent heat, and surface heat exchange layer. Based on the observed data of ground temperature, unfrozen water content, and heat flux, the coupled model herein is practicable for presenting the geotemperature regime and groundwater flow in the RTS area, thereby quantifying the ice‐rich permafrost thaw and mass wasting. The results presented indicate that: (1) the seepage velocity of the superficial zone (0–1.5 m depth) is two orders of magnitude higher than that of the permafrost table; (2) the mean ice‐rich permafrost thaw volume was 13.4 m2 from 2016 to 2021; and (3) the cumulative mass transport volume was 22 m2 from July 2020 to September 2021. In addition, the relation between the FTE (shown as the migration of sediments) and the amount of ground ice ablation can be fitted by an exponential equation. This work proposes a reliable method for quantifying the effect of FTE and is helpful to assess the eco‐environmental impacts of RTS.

show abstract

A pore-scale investigation of soil aggregate structure responding to freeze-thaw cycles using X-ray computed microtomography

Zhao

2023

J Soils Sediments

View full text Add to dashboard Cite

Soil macropore networks derived from X-ray computed tomography in response to typical thaw slumps in Qinghai-Tibetan Plateau, China

Cited by 14 publications

References 58 publications

Advances in retrogressive thaw slump research in permafrost regions

Advances in retrogressive thaw slump research in permafrost regions

Quantifying the effect of a retrogressive thaw slump on soil freeze–thaw erosion in permafrost regions on the Qinghai–Tibet Plateau, China

A pore-scale investigation of soil aggregate structure responding to freeze-thaw cycles using X-ray computed microtomography

Contact Info

Product

Resources

About