Using Multi-Temporal Aerial and Space Imagery for Coastal Dynamics Investigations at Kara and Pechora Seas, Russian Arctic

Aleksyutina, Daria

doi:10.5593/sgem2018/2.3/s10.034

Cited by 3 publications

(4 citation statements)

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“…Thermal erosion and associated mass wasting processes during a 13-day period of snow melting removed approximately 35% of the annual volume of eroded material along the coastline of Yugorskiy Peninsula [42]. At the study coast, the average erosion rates between 2012 and 2015 were estimated as 2-4 m/year for the high surface, 1.2-1.4 m/year for laida and 2.5-4 m/year for the low terrace [59]; therefore, thermodenudation intensity increases and snow melting removes the material from the coastal slope.…”

Section: Discussionmentioning

confidence: 95%

Snow Patches and Their Influence on Coastal Erosion at Baydaratskaya Bay Coast, Kara Sea, Russian Arctic

Bogatova

Buldovich

Khilimonyuk

2021

Water

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The Arctic coastal environment is a very dynamic system and sensitive to any changes. In our research we demonstrate that nivation (snow patch activity) impacts the Arctic landscape especially in the coastal dynamic at the western part of Russian Arctic. During fieldwork, snowbanks were described and studied and their qualitative role in the development of coastal systems was revealed for Baydaratskaya Bay coast, the Kara Sea. On one side, the large snow cover protects the coastal slope from thermodenudation and thermoabrasion; on the other side, a thick layer of snow affects the ground temperature regime. During snow melting, snow patches contribute to the removal of material from the coastal slope. The quantitative effect of snow on the ground temperature regime was assessed according to numerical simulations. The critical snow thickness was determined based on a calculation. Critical snow thicknesses based on simulation and field data correlated well. The numerical simulation showed the talik formation under the snow patch. Talik size essentially depends on the freezing temperature of sediment (influenced by salinity). The changes of ground temperature regime might further generate thawing settlement of sediment under snow and contribute to beach topography, which might be a trigger for thermoabrasion.

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Section: Discussionmentioning

confidence: 95%

Snow Patches and Their Influence on Coastal Erosion at Baydaratskaya Bay Coast, Kara Sea, Russian Arctic

Bogatova

Buldovich

Khilimonyuk

2021

Water

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“…In this region, the coastal erosion rates are 0.3 to 4.5 m/year [8,9,29,35,36]. At some points where massive ice beds open up on high cliffs and on low cliffs after great storm events, the erosion rates may rich 7-14 m/year [32,[37][38][39]. There are two meteorological stations located in the study area (bold points on Figure 1).…”

Section: Study Areamentioning

confidence: 99%

Sea Coast of the Western Part of the Russian Arctic under Climate Change: Dynamics, Technogenic Influence and Potential Economic Damage

Ogorodov

Badina

Bogatova

2023

Climate

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The Arctic coast dynamics has been an urgent problem over the last years, from both a practical and a fundamental point of view. In this research, for the first time for the Russian Arctic coast, we assessed the damage from the loss of territories in the western part of the Russian Arctic, where the active production and transportation of hydrocarbon material are carried out. Most of the studied coastline is composed of frozen unlithified soils with inclusions of underground ice. In this regard, the coastal zone is highly sensitive to climate change and its economic consequences. According to our investigation and literature data, the erosion rates could rich up to 2–3 m/year in some part of the coastline. Having estimated the cadastral cost of land and the area of the possible loss of territory, as well as the cost of transport infrastructure in the risk zone, we tried to predict the damage from changes in the total structure of the area under consideration. In particular, the economic damages from coastal permafrost processes were estimated. The assessment was conducted for the middle of the 21st century, taking into account the current climatic trend, erosion rate and probable maximum warming in this region.

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“…In the Drew Point area (Alaska), the acceleration in erosion rates is spectacular-the mean values have gone from 6.8 m per year [12,29]. However, some coastal segments show a certain long-term stability [14,32], while others also show fluctuations over time with periods of strong and weak erosion, particularly on the coasts of Yukon [33,34,109], Alaska [110,111], and Siberia [17], so that it is difficult to define trends. Global warming has been identified as the main cause of accelerated erosion of cliffs in the Arctic, particularly associated with melting permafrost associated with increasing thawing degree days and increased cliff toe exposure to hydrodynamic agents with the increase in the number of ice-free days [24,27,31].…”

Section: Causes Of Temporal Variabilitymentioning

confidence: 99%

“…Studies on erosion of cliffs in cold regions have been numerous over the last two decades and have mainly focused on the calculation of historical erosion rates mostly at decadal scales [14,25,[32][33][34]; and less often at annual or seasonal scales [27,35,36]. The quantification of erosion at high temporal resolution rarely exceeds a few years, and in rare cases ten years [30].…”

Section: Introductionmentioning

confidence: 99%

Long-Term Evolution and Monitoring at High Temporal Resolution of a Rapidly Retreating Cliff in a Cold Temperate Climate Affected by Cryogenic Processes, North Shore of the St. Lawrence Gulf, Quebec (Canada)

Bernatchez

Boucher‐Brossard

Corriveau

et al. 2021

JMSE

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This article focuses on the quantification of retreat rates, geomorphological processes, and hydroclimatic and environmental drivers responsible for the erosion of an unconsolidated fine-sediment cliff along the north shore of the Gulf of St. Lawrence (Quebec, Canada). Annual monitoring using field markers over a period of twenty years, coupled with photo interpretation and historical archive analysis, indicates an average annual erosion rate of 2.2 m per year between 1948 and 2017. An acceleration in retreat occurred during the last 70 years, leading to a maximum between 1997 and 2017 (3.4 m per year) and 2000–2020 (3.3 m per year). Daily observations based on six monitoring cameras installed along the cliff between 2008 and 2012 allowed the identification of mechanisms and geomorphological processes responsible for cliff retreat. Data analysis reveals seasonal activity peaks during winter and spring, which account for 75% of total erosional events. On an annual basis, cryogenic processes represent 68% of the erosion events observed and subaerial and hydrogeological processes account for 73%. Small-scale processes, such as gelifraction, solifluction, suffosion, debris collapse, and thermoabrasion, as well as mass movement events, such as slides and mudflows, induced rapid cliff retreat. Lithostratigraphy and cliff height exert an important control on erosion rates and retreat modes, which are described by three main drivers (hydrogeologic, cryogenic, and hydrodynamic processes). Critical conditions promoting high erosion rates include the absence of an ice-foot in winter, the absence of snow cover on the cliff face allowing unrestricted solar radiation, the repetition of winter warm spells, snow melting and sediment thawing, and high rainfall conditions (>30 mm or SPI > 2). The relationships between hydroclimatic forcing and retreat rates are difficult to establish without taking into account the quantification of the geomorphological processes involved. The absence of quantitative data on the relative contribution of geomorphological processes can constitute a major obstacle in modeling the retreat of cliffs with regard to climate change.

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Using Multi-Temporal Aerial and Space Imagery for Coastal Dynamics Investigations at Kara and Pechora Seas, Russian Arctic

Cited by 3 publications

References 0 publications

Snow Patches and Their Influence on Coastal Erosion at Baydaratskaya Bay Coast, Kara Sea, Russian Arctic

Snow Patches and Their Influence on Coastal Erosion at Baydaratskaya Bay Coast, Kara Sea, Russian Arctic

Sea Coast of the Western Part of the Russian Arctic under Climate Change: Dynamics, Technogenic Influence and Potential Economic Damage

Long-Term Evolution and Monitoring at High Temporal Resolution of a Rapidly Retreating Cliff in a Cold Temperate Climate Affected by Cryogenic Processes, North Shore of the St. Lawrence Gulf, Quebec (Canada)

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