Seasonal Thawing of Soils in the Beringia Region in Changing Climatic Conditions

Maslakov, Alexey; Ruzanov, Vladimir; Fedorov-Davydov, Dmitriy; Kraev, Gleb; Davydov, S.; Zamolodchikov, Dmitriy; Tregubov, Oleg; Shiklomanov, N. I.; Streletskiy, D.

doi:10.17238/issn2541-8416.2017.17.4.283

Cited by 2 publications

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“…However, common trend for most of CALM sites in NE Russia (Kolyma and Anadyr lowlands) identifies the stabilization of seasonal thaw deepening in recent years. This upward trend is characteristic of the air temperature at the end of the 20th and the beginning of the 21st centuries [52,53].…”

Section: Weather Characteristics Alt and Thaw Subsidence Contemporarmentioning

confidence: 85%

Permafrost Degradation within Eastern Chukotka CALM Sites in the 21st Century Based on CMIP5 Climate Models

et al. 2019

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Permafrost degradation caused by contemporary climate change significantly affects arctic regions. Active layer thickening combined with the thaw subsidence of ice-rich sediments leads to irreversible transformation of permafrost conditions and activation of exogenous processes, such as active layer detachment, thermokarst and thermal erosion. Climatic and permafrost models combined with a field monitoring dataset enable the provision of predicted estimations of the active layer and permafrost characteristics. In this paper, we present the projections of active layer thickness and thaw subsidence values for two Circumpolar Active Layer Monitoring (CALM) sites of Eastern Chukotka coastal plains. The calculated parameters were used for estimation of permafrost degradation rates in this region for the 21st century under various IPCC climate change scenarios. According to the studies, by the end of the century, the active layer will be 6–13% thicker than current values under the RCP (Representative Concentration Pathway) 2.6 climate scenario and 43–87% under RCP 8.5. This process will be accompanied by thaw subsidence with the rates of 0.4–3.7 cm∙a−1. Summarized surface level lowering will have reached up to 5 times more than current active layer thickness. Total permafrost table lowering by the end of the century will be from 150 to 310 cm; however, it will not lead to non-merging permafrost formation.

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Section: Weather Characteristics Alt and Thaw Subsidence Contemporarmentioning

confidence: 85%

Permafrost Degradation within Eastern Chukotka CALM Sites in the 21st Century Based on CMIP5 Climate Models

et al. 2019

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“…In the Kolyma River basin and the Chukchi Peninsula, Circumpolar Active Layer Monitoring (CALM) [27] sites have been operational since 1996 [28][29][30]. However, these sites are located in the lowland tundra landscapes.…”

Section: Active Layermentioning

confidence: 99%

Geocryological Conditions of Small Mountain Catchment in the Upper Kolyma Highland (Northeastern Asia)

Makarieva,

Zemlianskova,

Abramov

et al. 2024

Geosciences

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This research presents a comprehensive environmental assessment of a small mountain permafrost catchment of the Anmangynda River in the Upper Kolyma Highland (Northeastern Asia) over the period of 2021–2023. The study reveals significant diversity in climatic, geocryological, and hydrogeological conditions within this confined area, emphasizing the need for extensive field data collection and monitoring in vast permafrost regions with limited data availability. Key findings include variations in ground temperature, maximum seasonal thaw depth, and depths of zero annual amplitudes of ground temperature at different elevations and landscape types. Groundwater and surface flow dynamics within spring aufeis basins exhibit complex geocryological regimes influenced by icing processes. The presence of aufeis and its impact on local hydrology highlight the ecological significance of this phenomenon. Future research should focus on long-term trends in permafrost dynamics and their relationship with climate change, as well as the ecological effects of aufeis formation on local ecosystems. The study underscores the importance of a multi-faceted approach to environmental assessment, incorporating various environmental parameters and processes, to gain a comprehensive understanding of the intricate interactions within the cryosphere and their responses to changing climate conditions. Such knowledge is essential for addressing broader questions related to climate change, ecosystem resilience, and sustainable resource management in Northeastern Siberia.

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Seasonal Thawing of Soils in the Beringia Region in Changing Climatic Conditions

Cited by 2 publications

References 0 publications

Permafrost Degradation within Eastern Chukotka CALM Sites in the 21st Century Based on CMIP5 Climate Models

Permafrost Degradation within Eastern Chukotka CALM Sites in the 21st Century Based on CMIP5 Climate Models

Geocryological Conditions of Small Mountain Catchment in the Upper Kolyma Highland (Northeastern Asia)

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