Distribution and Recurrence of Warming‐Induced Retrogressive Thaw Slumps on the Central Qinghai‐Tibet Plateau

Journal of Geophysical Research Earth Surface, Journal Year: 2023, Volume and Issue: 128(8)

Published: July 20, 2023

Abstract Retrogressive thaw slumps (RTSs) have become a dominant geomorphic event in permafrost regions due to the modern climate change. However, roles of topographic, vegetation, and soil factors influencing spatial distribution recurrence RTSs remain not fully understood. Here, we identified formation 459 during 2008–2021 using satellite images central Qinghai‐Tibet Plateau (Northwest Beiluhe Basin, 239 km 2 ). We found that topographic environmental attributes exhibited strong correlations with variation RTS density. The RTS‐affected areas had higher slope, elevation, relative slope position, normalized difference vegetation index, water content, lower bulk density than other landscapes. Regarding influence on activity status 2018–2020, content were advantageous for RTSs. larger sizes presenting an elongated shape more likely be active. Additionally, examined headwall based fractal dimension UAV‐based orthophoto. becomes complicated small‐scale thawing ice‐rich permafrost, which may further induce subsequent slumping. Higher air temperature triggers new RTSs, increased precipitation responsible Our findings can enhance our understanding development pattern mechanism regions.

Language: Английский

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Recent intensified erosion and massive sediment deposition in Tibetan Plateau rivers

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Jan. 24, 2024

Recent climate change has caused an increase in warming-driven erosion and sediment transport processes on the Tibetan Plateau (TP). Yet a lack of measurements hinders our understanding basin-scale dynamics associated spatiotemporal changes. Here, using satellite-based estimates suspended sediment, we reconstruct quantitative history patterns major headwater basins from 1986 to 2021. Out 13 warming-affected regions, 63% rivers have experienced significant increases flux. Despite such intensified erosion, find that 30% total flux been temporarily deposited within rivers. Our findings reveal pronounced heterogeneity across basins. The recurrent fluctuations erosion-deposition river channels not only result underestimation magnitude but also drive continuous transformations valley morphology, thereby endangering local ecosystems, landscape stability, infrastructure project safety.

Language: Английский

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Characteristics and changes of glacial lakes and outburst floods

Nature Reviews Earth & Environment, Journal Year: 2024, Volume and Issue: 5(6), P. 447 - 462

Published: May 21, 2024

Language: Английский

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Anthropogenic impacts on mud and organic carbon cycling

Nature Geoscience, Journal Year: 2024, Volume and Issue: 17(4), P. 287 - 297

Published: April 1, 2024

Language: Английский

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Changes in global fluvial sediment concentrations and fluxes between 1985 and 2020

Nature Sustainability, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 2, 2025

Language: Английский

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River Ice Effects on Sediment Transport and Channel Morphology—Progress and Research Needs

Deleted Journal, Journal Year: 2025, Volume and Issue: 2(1), P. 2 - 2

Published: Jan. 22, 2025

Sediment transport in alluvial channels has a long history of intensive research. River ice could affect sediment and channel morphology through the impact various dynamic thermal processes. However, studies on under influence have been minimal until recent years. This phenomenon was partially due to complicated interactions between ice, flow, dynamics, which require good understanding river process, addition difficult field data collection conditions. paper reviews progress needs ice-related research morphology, including cover surface runs transport, effects frazil anchor bank stability with freeze-thaw effects.

Language: Английский

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Flood complexity and rising exposure risk in High Mountain Asia under climate change

Science Bulletin, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 1, 2025

Language: Английский

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Shifted sediment-transport regimes by climate change and amplified hydrological variability in cryosphere-fed rivers

Science Advances, Journal Year: 2023, Volume and Issue: 9(45)

Published: Nov. 8, 2023

Climate change affects cryosphere-fed rivers and alters seasonal sediment dynamics, affecting cyclical fluvial material supply year-round water-food-energy provisions to downstream communities. Here, we demonstrate sediment-transport regime shifts from the 1960s 2000s in four characterized by glacial, nival, pluvial, mixed regimes, respectively. Spring sees a shift toward pluvial-dominated transport due less snowmelt more erosive rainfall. Summer is intensified glacier meltwater pulses pluvial events that exceptionally increase fluxes. Our study highlights increases hydroclimatic extremes cryosphere degradation lead amplified variability fluxes higher summer peaks, which can threaten river infrastructure safety ecosystems worsen glacial/pluvial floods. We further offer monthly-scale sediment-availability-transport model reproduce such thus help facilitate sustainable reservoir operation management wider cryospheric regions under future climate hydrological change.

Language: Английский

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Large sinuous rivers are slowing down in a warming Arctic

Nature Climate Change, Journal Year: 2023, Volume and Issue: 13(4), P. 375 - 381

Published: March 9, 2023

Language: Английский

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Global emergent responses of stream microbial metabolism to glacier shrinkage

Nature Geoscience, Journal Year: 2024, Volume and Issue: 17(4), P. 309 - 315

Published: March 1, 2024

Abstract Most cryospheric ecosystems are energy limited. How their energetics will respond to climate change remains largely unknown. This is particularly true for glacier-fed streams, which interface with the cryosphere and initiate some of Earth’s largest river systems. Here, by studying resource stoichiometry microbial in 154 streams sampled Vanishing Glaciers project across major mountain ranges, we show that these benthic microbiome overall carbon phosphorus Threshold elemental ratios low use efficiencies (median: 0.15) modelled from extracellular enzymatic activities corroborate limitation agreement maintenance metabolism microorganisms. Space-for-time substitution analyses suggest glacier shrinkage stimulate primary production thereby relieving limitation. Concomitantly, find increasing streamwater temperature probably growth (temperature sensitivity: 0.62 eV). Consequently, elevated demands phosphorus, but diminishing inputs subglacial sources, may intensify as glaciers shrink. Our study thus unveils a ‘green transition’ towards autotrophy world’s entailing shifts

Language: Английский

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