Degradation and local growth of “Xing'an-Baikal” permafrost responding to climate warming and the consequences

Earth-Science Reviews, Journal Year: 2024, Volume and Issue: 255, P. 104865 - 104865

Published: July 10, 2024

Language: Английский

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Near‐surface permafrost extent and active layer thickness characterized by reanalysis/assimilation data

Atmospheric Science Letters, Journal Year: 2025, Volume and Issue: 26(1)

Published: Jan. 1, 2025

Abstract Whilst permafrost change is widely concerned in the context of global warming, lack observations becomes one major limitations for conducting large‐scale and long‐term research. Reanalysis/assimilation data theory can make up observations, but how they characterize extent active layer thickness remains unclear. Here, we investigate near‐surface characterized by seven reanalysis/assimilation datasets (CFSR, MERRA‐2, ERA5, ERA5‐Land, GLDAS‐CLSMv20, GLDAS‐CLSMv21, GLDAS‐Noah). Results indicate that most have limited abilities characterizing thickness. GLDAS‐CLSMv20 overall optimal terms comprehensive performance both present‐day change. The indicates decreases −0.69 × 10 6 km 2 decade −1 deepens 0.06 m from 1979 to 2014. Change significantly correlated air temperature, precipitation, downward longwave radiation summer, correlations show regional differences. Our study implies an imperative advance data's reproduce permafrost, especially reanalysis data.

Language: Английский

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Climate warming and wetting poses a severe threat to permafrost engineering stability on the Qinghai‒Xizang Plateau

Advances in Climate Change Research, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 1, 2025

Language: Английский

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Rapid degradation of frozen soil environments in thermokarst-affected alpine grasslands on the Qinghai-Tibet Plateau under climate change

CATENA, Journal Year: 2025, Volume and Issue: 254, P. 108936 - 108936

Published: March 19, 2025

Language: Английский

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Hydrological Changes Caused by Integrated Warming, Wetting, and Greening in Permafrost Regions of the Qinghai‐Tibetan Plateau

Water Resources Research, Journal Year: 2025, Volume and Issue: 61(4)

Published: April 1, 2025

Abstract The Qinghai‐Tibetan Plateau (QTP) has undergone significant warming, wetting, and greening (WWG) over decades, alongside substantial alterations in hydrological regimes. These changes present great challenges for safeguarding water resources ecosystems downstream. However, the lack of field observation systematic research obscured our understanding how processes respond to combined influences climate‐permafrost‐vegetation. This study focuses on source regions Yangtze River, one highest permafrost‐covered basins QTP, employs a process‐based model quantify effects WWG processes. We show that increasing precipitation dominates subsurface runoff while rising temperature primarily affects surface by reducing frozen duration (−52 days/century) thickening active layer (+2.4 cm/year). Greening vegetation transpiration interception evaporation. Warming, will cause transition dynamics from dominance permafrost basins, reduce risk both flooding shortage indicated decreased maximum low flow high 11.0 5.0 days/year, respectively. Moreover, cold exhibit greater propensity generating runoff, as higher annual increase coefficient (0.005/year) total (4.81 mm/year), compared warm (with 0.001/year 1.20 mm/year, respectively). findings enhance due provide insights management under climate change.

Language: Английский

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Recent intensified riverine CO2 emission across the Northern Hemisphere permafrost region

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: April 16, 2025

Language: Английский

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Experimental and Numerical Analysis of Freeze–Thaw-Induced Mechanical Degradation in the Coarse-Grained Soil of the Southeastern Qinghai–Xizang Plateau

Applied Sciences, Journal Year: 2025, Volume and Issue: 15(9), P. 4900 - 4900

Published: April 28, 2025

To investigate the effects of freeze–thaw (FT) cycles on mechanical properties coarse-grained soil in southeastern Xizang under different moisture contents, this study focuses from a large landslide deposit Linzhi City, Xizang. FT cycle tests, triaxial shear and numerical simulations were employed to systematically examine comprehensive impact varying cycles, content, confining pressure soil’s characteristics. The results show that significantly affect stress–strain behavior degree strain softening increased approximately 11.6% initially 31.2% after 15 with strength decreasing by an average 31.8%. Specifically, cohesion decreased 38% 55% 0 internal friction angle 29% 32%. Additionally, higher content led more pronounced degradation, while effectively mitigated these deteriorative effects. Numerical simulation indicated as 7.6% 11.6%, number required reach critical instability state 150 106, finally only 15, maximum equivalent plastic increasing 0.20 2.47. findings provide key parameters for understanding formation evolution disasters lay scientific foundation assessment long-term prevention cold-region geological hazards.

Language: Английский

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Contribution of Decreasing Surface Albedo-Induced Carbon Offset Potential/Global Warming Impact (Gwiδα) on the Qinghai-Tibet Plateau May Be Undervalued

Published: Jan. 1, 2024

Language: Английский

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Enhanced understanding of warming and humidifying on ground heat flux in the Tibetan Plateau Hinterland

Atmospheric Research, Journal Year: 2024, Volume and Issue: 314, P. 107799 - 107799

Published: Nov. 17, 2024

Language: Английский

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Ground thermal regime changes caused by integrated warming, wetting, and greening in permafrost regions of the Qinghai-Tibetan Plateau

CATENA, Journal Year: 2024, Volume and Issue: 249, P. 108658 - 108658

Published: Dec. 9, 2024

Language: Английский

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