Thermal regime variability of islands in the Lena River near Yakutsk, eastern Siberia

Costard, F.; Gautier, Emmanuèle; Konstantinov, Pavel; Bouchard, Frédéric; Séjourné, Antoine; Dupeyrat, L.; Fedorov, A.A.

doi:10.1002/ppp.2136

Cited by 4 publications

(3 citation statements)

References 25 publications

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“…The use of such low cost devices allows for a good spatial coverage of conditions in the study area, despite the instruments' low accuracy. These sensors were previously used for understanding the thermal regime of frozen islands along the Lena floodplain [27]. The adopted strategy relies on monitoring the air, and the surface temperature under various land covers to study land cover types influence the propagation of heat (e.g., to identify the impact of vegetation cover, soil properties, slope and orientation, etc.…”

Section: Long-term Monitoring Temperature and Point-scale Subsurface ...mentioning

confidence: 99%

“…When present, the river talik permanently influences the river flow rates in the form of base flow [15,25]. Furthermore, the evolution of river and water catchment hydrological regimes are impacted by evolution in the active layer depth (ALD), as described in the literature [15,[25][26][27][28]. The river-groundwater continuum is a further key feature responsible for the lateral transport and redistribution of dissolved carbon [29,30].…”

Section: Introductionmentioning

confidence: 99%

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Comparing Thermal Regime Stages along a Small Yakutian Fluvial Valley with Point Scale Measurements, Thermal Modeling, and Near Surface Geophysics

et al. 2023

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Arctic regions are highly impacted by the global temperature rising and its consequences and influences on the thermo-hydro processes and their feedbacks. Theses processes are especially not very well understood in the context of river–permafrost interactions and permafrost degradation. This paper focuses on the thermal characterization of a river–valley system in a continuous permafrost area (Syrdakh, Yakutia, Eastern Siberia) that is subject to intense thawing, with major consequences on water resources and quality. We investigated this Yakutian area through two transects crossing the river using classical tools such as in–situ temperature measurements, direct active layer thickness estimations, unscrewed aerial vehicle (UAV) imagery, heat transfer numerical experiments, Ground-Penetrating Radar (GPR), and Electrical Resistivity Tomography (ERT). Of these two transects, one was closely investigated with a long-term temperature time series from 2012 to 2018, while both of them were surveyed by geophysical and UAV data acquisition in 2017 and 2018. Thermodynamical numerical simulations were run based on the long-term temperature series and are in agreement with river thermal influence on permafrost and active layer extensions retrieved from GPR and ERT profiles. An electrical resistivity-temperature relationship highlights the predominant role of water in such a complicated system and paves the way to coupled thermo-hydro-geophysical modeling for understanding permafrost–river system evolution.

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Section: Long-term Monitoring Temperature and Point-scale Subsurface ...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparing Thermal Regime Stages along a Small Yakutian Fluvial Valley with Point Scale Measurements, Thermal Modeling, and Near Surface Geophysics

et al. 2023

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“…1,18,21 The inherent variability of fluvial landscape dynamics is a major challenge for observational and predictive frameworks. 15,22 The variability is not restricted to differences between regions or flood events, 6,12,19 as the drivers, controls, and thus consequences are heterogeneous even for a single flood event. 16,23 Drivers such as shear stress, water temperature, and sediment deposition vary within the flood perimeter.…”

Section: Introductionmentioning

confidence: 99%

Disparate permafrost terrain changes after a large flood observed from space

Zwieback,

McClernan,

Kanevskiy

et al. 2023

Permafrost & Periglacial

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The 2015 spring flood of the Sagavanirktok River inundated large swaths of tundra as well as infrastructure near Prudhoe Bay, Alaska. Its lasting impact on permafrost, vegetation, and hydrology is unknown but compels attention in light of changing Arctic flood regimes. We combined InSAR and optical satellite observations to quantify subdecadal permafrost terrain changes and identify their controls. While the flood locally induced quasi‐instantaneous ice‐wedge melt, much larger areas were characterized by subtle, spatially variable post‐flood changes. Surface deformation from 2015 to 2019 estimated from ALOS‐2 and Sentinel‐1 InSAR varied substantially within and across terrain units, with greater subsidence on average in flooded locations. Subsidence exceeding 5 cm was locally observed in inundated ice‐rich units and also in inactive floodplains. Overall, subsidence increased with deposit age and thus ground ice content, but many flooded ice‐rich units remained stable, indicating variable drivers of deformation. On average, subsiding ice‐rich locations showed increases in observed greenness and wetness. Conversely, many ice‐poor floodplains greened without deforming. Ice wedge degradation in flooded locations with elevated subsidence was mostly of limited intensity, and the observed subsidence largely stopped within 2 years. Based on remote sensing and limited field observations, we propose that the disparate subdecadal changes were influenced by spatially variable drivers (e.g., sediment deposition, organic layer), controls (ground ice and its degree of protection), and feedback processes. Remote sensing helps quantify the heterogeneous interactions between permafrost, vegetation, and hydrology across permafrost‐affected fluvial landscapes. Interdisciplinary monitoring is needed to improve predictions of landscape dynamics and to constrain sediment, nutrient, and carbon budgets.

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Periglacial landforms and soil formation on summit of the Mount lda (Kaz Dağı), Biga Peninsula-Turkey

et al. 2022

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Thermal regime variability of islands in the Lena River near Yakutsk, eastern Siberia

Cited by 4 publications

References 25 publications

Comparing Thermal Regime Stages along a Small Yakutian Fluvial Valley with Point Scale Measurements, Thermal Modeling, and Near Surface Geophysics

Comparing Thermal Regime Stages along a Small Yakutian Fluvial Valley with Point Scale Measurements, Thermal Modeling, and Near Surface Geophysics

Disparate permafrost terrain changes after a large flood observed from space

Periglacial landforms and soil formation on summit of the Mount lda (Kaz Dağı), Biga Peninsula-Turkey

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