Evolution of the banks of thermokarst lakes in Central Yakutia (Central Siberia) due to retrogressive thaw slump activity controlled by insolation
International audience As observed in most regions in the Arctic, the thawing of ice-rich permafrost (thermokarst) has been developing in Central Yakutia. However, the relationship between thermokarst development and climate variations is not well understood in this region, in particular the develop...
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Online Access: | https://hal.science/hal-01143492 https://doi.org/10.1016/j.geomorph.2015.03.033 |
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ftunivangershal:oai:HAL:hal-01143492v1 2024-04-28T08:10:51+00:00 Evolution of the banks of thermokarst lakes in Central Yakutia (Central Siberia) due to retrogressive thaw slump activity controlled by insolation Séjourné, A. Costard, F. Fedorov, A. A. Gargani, J. Skorve, J. Massé, Marion Mège, D. Géosciences Paris Sud (GEOPS) Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS) Laboratoire de Planétologie et Géodynamique UMR 6112 (LPG) Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST) Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) 2015 https://hal.science/hal-01143492 https://doi.org/10.1016/j.geomorph.2015.03.033 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.geomorph.2015.03.033 hal-01143492 https://hal.science/hal-01143492 doi:10.1016/j.geomorph.2015.03.033 ISSN: 0169-555X Geomorphology https://hal.science/hal-01143492 Geomorphology, 2015, 241, pp.31-40 (IF 2,577). ⟨10.1016/j.geomorph.2015.03.033⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2015 ftunivangershal https://doi.org/10.1016/j.geomorph.2015.03.033 2024-04-05T02:26:00Z International audience As observed in most regions in the Arctic, the thawing of ice-rich permafrost (thermokarst) has been developing in Central Yakutia. However, the relationship between thermokarst development and climate variations is not well understood in this region, in particular the development rate of thaw slumps. The objectives of this paper are to understand the current development of thermokarst by studying the evolution of the banks of thermokarst lakes. We studied retrogressive thaw slumps and highly degraded ice-wedge polygons (baydjarakhs), indicative of thermokarst, using high resolution satellite images taken in 2011–2013 and conducting field studies. The retrogressive thaw slump activity results in the formation of thermocirque with a minimum and maximum average headwall retreat of 0.5 and 3.16 m.yr− 1 respectively. The thermocirques and the baydjarakhs are statistically more concentrated on the south- to southwest-facing banks of thermokarst lakes. Moreover, the rate of headwall retreat of the thermocirques is the most important on the south-facing banks of the lakes. These observations indicate a control of the current permafrost thaw on the banks of thermokarst lakes by insolation. In the context of recent air temperature increase in Central Yakutia, the rate of thermocirque development may increase in the future. Article in Journal/Newspaper Arctic Ice permafrost Thermokarst wedge* Yakutia Siberia Portail des publications scientifiques de l’Université d’Angers (HAL) Geomorphology 241 31 40 |
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Open Polar |
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Portail des publications scientifiques de l’Université d’Angers (HAL) |
op_collection_id |
ftunivangershal |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Séjourné, A. Costard, F. Fedorov, A. A. Gargani, J. Skorve, J. Massé, Marion Mège, D. Evolution of the banks of thermokarst lakes in Central Yakutia (Central Siberia) due to retrogressive thaw slump activity controlled by insolation |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience As observed in most regions in the Arctic, the thawing of ice-rich permafrost (thermokarst) has been developing in Central Yakutia. However, the relationship between thermokarst development and climate variations is not well understood in this region, in particular the development rate of thaw slumps. The objectives of this paper are to understand the current development of thermokarst by studying the evolution of the banks of thermokarst lakes. We studied retrogressive thaw slumps and highly degraded ice-wedge polygons (baydjarakhs), indicative of thermokarst, using high resolution satellite images taken in 2011–2013 and conducting field studies. The retrogressive thaw slump activity results in the formation of thermocirque with a minimum and maximum average headwall retreat of 0.5 and 3.16 m.yr− 1 respectively. The thermocirques and the baydjarakhs are statistically more concentrated on the south- to southwest-facing banks of thermokarst lakes. Moreover, the rate of headwall retreat of the thermocirques is the most important on the south-facing banks of the lakes. These observations indicate a control of the current permafrost thaw on the banks of thermokarst lakes by insolation. In the context of recent air temperature increase in Central Yakutia, the rate of thermocirque development may increase in the future. |
author2 |
Géosciences Paris Sud (GEOPS) Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS) Laboratoire de Planétologie et Géodynamique UMR 6112 (LPG) Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST) Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Séjourné, A. Costard, F. Fedorov, A. A. Gargani, J. Skorve, J. Massé, Marion Mège, D. |
author_facet |
Séjourné, A. Costard, F. Fedorov, A. A. Gargani, J. Skorve, J. Massé, Marion Mège, D. |
author_sort |
Séjourné, A. |
title |
Evolution of the banks of thermokarst lakes in Central Yakutia (Central Siberia) due to retrogressive thaw slump activity controlled by insolation |
title_short |
Evolution of the banks of thermokarst lakes in Central Yakutia (Central Siberia) due to retrogressive thaw slump activity controlled by insolation |
title_full |
Evolution of the banks of thermokarst lakes in Central Yakutia (Central Siberia) due to retrogressive thaw slump activity controlled by insolation |
title_fullStr |
Evolution of the banks of thermokarst lakes in Central Yakutia (Central Siberia) due to retrogressive thaw slump activity controlled by insolation |
title_full_unstemmed |
Evolution of the banks of thermokarst lakes in Central Yakutia (Central Siberia) due to retrogressive thaw slump activity controlled by insolation |
title_sort |
evolution of the banks of thermokarst lakes in central yakutia (central siberia) due to retrogressive thaw slump activity controlled by insolation |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.science/hal-01143492 https://doi.org/10.1016/j.geomorph.2015.03.033 |
genre |
Arctic Ice permafrost Thermokarst wedge* Yakutia Siberia |
genre_facet |
Arctic Ice permafrost Thermokarst wedge* Yakutia Siberia |
op_source |
ISSN: 0169-555X Geomorphology https://hal.science/hal-01143492 Geomorphology, 2015, 241, pp.31-40 (IF 2,577). ⟨10.1016/j.geomorph.2015.03.033⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.geomorph.2015.03.033 hal-01143492 https://hal.science/hal-01143492 doi:10.1016/j.geomorph.2015.03.033 |
op_doi |
https://doi.org/10.1016/j.geomorph.2015.03.033 |
container_title |
Geomorphology |
container_volume |
241 |
container_start_page |
31 |
op_container_end_page |
40 |
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1797578536067792896 |