Thermomechanical erosion modelling of Baydaratskaya Bay, Russia with COSMOS

Pearson, Stuart; Lubbad, Raed; Le, Thi Minh Hue; Nairn, Robert B.

doi:10.1201/9781315375045-34

Cited by 4 publications

(3 citation statements)

References 33 publications

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“…When a frozen bluff starts to melt, the mechanical strength of the soil is reduced. At some point, the stability of the slope cannot be maintained, and slope slipping occurs [16]. It was observed that thermodenudation could contribute up to 0.4 m of coastal retreat per year in the Kara Sea, where bluffs are mostly silt and silty clay [17].…”

Section: Introductionmentioning

confidence: 99%

A Probabilistic Model of Coastal Bluff-Top Erosion in High Latitudes Due to Thermoabrasion: A Case Study from Baydaratskaya Bay in the Kara Sea

Islam

Lubbad

Afzal

2020

JMSE

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Arctic coastal erosion demands more attention as the global climate continues to change. Unlike those along low-latitude and mid-latitude, sediments along Arctic coastlines are often frozen, even during summer. Thermal and mechanical factors must be considered together when analysing Arctic coastal erosion. Two major erosion mechanisms in the Arctic have been identified: thermodenudation and thermoabrasion. Field observations of Arctic coastal erosion are available in Baydaratskaya Bay in the Kara Sea. The objective of this study is to develop a probabilistic model of thermoabrasion to simulate the measured coastal erosion at two sites where observations suggest thermoabrasion is dominant. The model simulates two time periods: (a) the summer of 2013 (2012–2013) and (b) the summer of 2017 (2016–2017). A probabilistic analysis is performed to quantify the uncertainties in the model results. The input parameters are assumed to follow normal and lognormal distributions with a 10% coefficient of variation. Monte Carlo simulation is applied to determine the erosion rates for the two different cases. The simulation results agree reasonably well with the field observations. In addition, a sensitivity analysis is performed, revealing a very high sensitivity of the model to sea-level changes. The model indicates that the relation between sea-level rise and thermoabrasional erosion is exponential.

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Section: Introductionmentioning

confidence: 99%

A Probabilistic Model of Coastal Bluff-Top Erosion in High Latitudes Due to Thermoabrasion: A Case Study from Baydaratskaya Bay in the Kara Sea

Islam

Lubbad

Afzal

2020

JMSE

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“…For example, local bathymetry can be used for validating the mapping of landfast sea ice stability with inter-ferometric synthetic aperture radar (Dammann et al, 2019). Further, coastal bathymetry and water level are important parameters for determining rates of coastal erosion (e.g., Barnhart et al, 2014;Pearson et al, 2016), and an improvement of local bathymetry will therefore help to improve model forecasts of coastal erosion in the Laptev Sea region (e.g., Rolph et al, 2021). In addition, for determining the extent of subsea permafrost, knowledge of water depth and sea surface morphology is essential.…”

Section: Potential Applications and Usage Of The Data Setsmentioning

confidence: 99%

High-resolution bathymetry models for the Lena Delta and Kolyma Gulf coastal zones

Fuchs

Palmtag

Juhls

et al. 2022

Earth Syst. Sci. Data

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Abstract. Arctic river deltas and deltaic near-shore zones represent important land–ocean transition zones influencing sediment dynamics and nutrient fluxes from permafrost-affected terrestrial ecosystems into the coastal Arctic Ocean. To accurately model fluvial carbon and freshwater export from rapidly changing river catchments as well as assess impacts of future change on the Arctic shelf and coastal ecosystems, we need to understand the sea floor characteristics and topographic variety of the coastal zones. To date, digital bathymetrical data from the poorly accessible, shallow, and large areas of the eastern Siberian Arctic shelves are sparse. We have digitized bathymetrical information for nearly 75 000 locations from large-scale (1:25 000–1:500 000) current and historical nautical maps of the Lena Delta and the Kolyma Gulf region in northeastern Siberia. We present the first detailed and seamless digital models of coastal zone bathymetry for both delta and gulf regions in 50 and 200 m spatial resolution. We validated the resulting bathymetry layers using a combination of our own water depth measurements and a collection of available depth measurements, which showed a strong correlation (r>0.9). Our bathymetrical models will serve as an input for a high-resolution coupled hydrodynamic–ecosystem model to better quantify fluvial and coastal carbon fluxes to the Arctic Ocean, but they may be useful for a range of other studies related to Arctic delta and near-shore dynamics such as modeling of submarine permafrost, near-shore sea ice, or shelf sediment transport. The new digital high-resolution bathymetry products are available on the PANGAEA data set repository for the Lena Delta (https://doi.org/10.1594/PANGAEA.934045; Fuchs et al., 2021a) and Kolyma Gulf region (https://doi.org/10.1594/PANGAEA.934049; Fuchs et al., 2021b), respectively. Likewise, the depth validation data are available on PANGAEA as well (https://doi.org/10.1594/PANGAEA.933187; Fuchs et al., 2021c).

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“…Further, coastal bathymetry and water level are important parameters for determining rates of coastal erosion (e.g. Barnhart et al, 2014;Pearson et al, 2016) and an improvement of local bathymetry will therefore help to improve model forecasts of coastal erosion in the Laptev Sea region (e.g. Rolph et al, 2021).…”

Section: Potential Applications and Usage Of The Data Setsmentioning

confidence: 99%

High-resolution bathymetry models for the Lena Delta and Kolyma Gulf coastal zones

Fuchs

Palmtag

Juhls

et al. 2021

Preprint

View full text Add to dashboard Cite

Abstract. Arctic river deltas and deltaic near-shore zones represent important land-ocean transition zones influencing sediment dynamics and nutrient fluxes from permafrost-affected terrestrial ecosystems into the coastal Arctic Ocean. To accurately model fluvial carbon and freshwater export from rapidly changing river catchments, as well assessing impacts of future change on the Arctic shelf and coastal ecosystems, we need to understand the sea floor characteristics and topographic variety of the coastal zones. To date, digital bathymetrical data from the poorly accessible, shallow and large areas of the eastern Siberian Arctic shelves are sparse. We have digitized bathymetrical information for nearly 75,000 locations from large-scale current and historical nautical maps of the Lena Delta and the Kolyma Gulf Region in Northeast Siberia. We present the first detailed and seamless digital models of coastal zone bathymetry for both delta/gulf regions. We validated the resulting bathymetry layers using a combination of our own water depth measurements and a collection of available depth measurements, which showed a strong correlation (r > 0.9). Our bathymetrical models will serve as an input for a high-resolution coupled hydrodynamic-ecosystem model to better quantify fluvial and coastal carbon fluxes to the Arctic Ocean but may be useful for a range of other studies related to Arctic delta and near-shore dynamics such as modelling of submarine permafrost, near-shore sea ice, or shelf sediment transport. The new digital high-resolution bathymetry products are available on the PANGAEA data set repository (Fuchs et al. 2021a, b). Likewise the depth validation data is available on PANGAEA as well (Fuchs et al., 2021c).

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Thermomechanical erosion modelling of Baydaratskaya Bay, Russia with COSMOS

Cited by 4 publications

References 33 publications

A Probabilistic Model of Coastal Bluff-Top Erosion in High Latitudes Due to Thermoabrasion: A Case Study from Baydaratskaya Bay in the Kara Sea

A Probabilistic Model of Coastal Bluff-Top Erosion in High Latitudes Due to Thermoabrasion: A Case Study from Baydaratskaya Bay in the Kara Sea

High-resolution bathymetry models for the Lena Delta and Kolyma Gulf coastal zones

High-resolution bathymetry models for the Lena Delta and Kolyma Gulf coastal zones

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