Laboratory simulation of retrogressive thaw slumps
Over the last decades, the ice-rich permafrost (with ice wedges and massive ice) of Central Yakutia (Eastern Siberia) was highly vulnerable and prone to extensive degradation named thermokarst. The presence of large scale thermokarst slumps were observed whose name is Retrogressive thaw slumps. Here...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.921498 2024-10-13T14:07:59+00:00 Laboratory simulation of retrogressive thaw slumps Costard, François 2020 text/tab-separated-values, 4 data points https://doi.pangaea.de/10.1594/PANGAEA.921498 https://doi.org/10.1594/PANGAEA.921498 en eng PANGAEA Costard, François; Dupeyrat, Laure; Séjourné, Antoine; Bouchard, Frédéric; Fedorov, A; Saint-Bézar, Betrand (2021): Retrogressive Thaw Slumps on Ice‐Rich Permafrost Under Degradation: Results From a Large‐Scale Laboratory Simulation. Geophysical Research Letters, 48(1), e2020GL091070, https://doi.org/10.1029/2020GL091070 https://doi.pangaea.de/10.1594/PANGAEA.921498 https://doi.org/10.1594/PANGAEA.921498 CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess Geosciences Paris-Saclay, CNRS/UPS UMR 8148 GEOPS Binary Object Binary Object (File Size) Binary Object (Media Type) cold room File content laboratory simulation Siberia thermokarst dataset 2020 ftpangaea https://doi.org/10.1594/PANGAEA.92149810.1029/2020GL091070 2024-10-02T00:42:44Z Over the last decades, the ice-rich permafrost (with ice wedges and massive ice) of Central Yakutia (Eastern Siberia) was highly vulnerable and prone to extensive degradation named thermokarst. The presence of large scale thermokarst slumps were observed whose name is Retrogressive thaw slumps. Here, we present results of a full-scale physical modelling of such retrogressive thaw slumps in a cold room. We used the cold-room at the GEOPS laboratory (CNRS/University of Paris Saclay, France) dedicated to the physical modelling in periglacial geomorphology. These experiments were instrumented using temperature sensors to survey the freezing and thawing front vs. time. Our results show that heterogeneous frozen soil with ice wedges undergoes a strong decohesion of its structure during the thawing phase and an easier circulation of warm air. Data were collected using a rectangular box of 2.5 m x 2.5 m wide and 0.5 m depth in which a ground surface of fine sand (D50 = 200 µm; Wp (max) = 20 %) materials was saturated with water. These experiments were instrumented using 10 temperature sensors (platinum resistance thermometers Pt100 with ±0.1°C accuracy) to survey the freezing and thawing front vs. time. All data are in °C and registered in a data-logger. During each simulation, we also analyzed the development of associated thermokarst degradation landforms using time-lapse photography with a video camera. File name thermokarst1: Time-lapse of the RTS experiment with artificial ice wedges (experiment 1). File name thermokarst 2: RTS experiment with icy layers (experiment 2). Dataset Ice permafrost Thermokarst wedge* Yakutia Siberia PANGAEA - Data Publisher for Earth & Environmental Science |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Binary Object Binary Object (File Size) Binary Object (Media Type) cold room File content laboratory simulation Siberia thermokarst |
spellingShingle |
Binary Object Binary Object (File Size) Binary Object (Media Type) cold room File content laboratory simulation Siberia thermokarst Costard, François Laboratory simulation of retrogressive thaw slumps |
topic_facet |
Binary Object Binary Object (File Size) Binary Object (Media Type) cold room File content laboratory simulation Siberia thermokarst |
description |
Over the last decades, the ice-rich permafrost (with ice wedges and massive ice) of Central Yakutia (Eastern Siberia) was highly vulnerable and prone to extensive degradation named thermokarst. The presence of large scale thermokarst slumps were observed whose name is Retrogressive thaw slumps. Here, we present results of a full-scale physical modelling of such retrogressive thaw slumps in a cold room. We used the cold-room at the GEOPS laboratory (CNRS/University of Paris Saclay, France) dedicated to the physical modelling in periglacial geomorphology. These experiments were instrumented using temperature sensors to survey the freezing and thawing front vs. time. Our results show that heterogeneous frozen soil with ice wedges undergoes a strong decohesion of its structure during the thawing phase and an easier circulation of warm air. Data were collected using a rectangular box of 2.5 m x 2.5 m wide and 0.5 m depth in which a ground surface of fine sand (D50 = 200 µm; Wp (max) = 20 %) materials was saturated with water. These experiments were instrumented using 10 temperature sensors (platinum resistance thermometers Pt100 with ±0.1°C accuracy) to survey the freezing and thawing front vs. time. All data are in °C and registered in a data-logger. During each simulation, we also analyzed the development of associated thermokarst degradation landforms using time-lapse photography with a video camera. File name thermokarst1: Time-lapse of the RTS experiment with artificial ice wedges (experiment 1). File name thermokarst 2: RTS experiment with icy layers (experiment 2). |
format |
Dataset |
author |
Costard, François |
author_facet |
Costard, François |
author_sort |
Costard, François |
title |
Laboratory simulation of retrogressive thaw slumps |
title_short |
Laboratory simulation of retrogressive thaw slumps |
title_full |
Laboratory simulation of retrogressive thaw slumps |
title_fullStr |
Laboratory simulation of retrogressive thaw slumps |
title_full_unstemmed |
Laboratory simulation of retrogressive thaw slumps |
title_sort |
laboratory simulation of retrogressive thaw slumps |
publisher |
PANGAEA |
publishDate |
2020 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.921498 https://doi.org/10.1594/PANGAEA.921498 |
genre |
Ice permafrost Thermokarst wedge* Yakutia Siberia |
genre_facet |
Ice permafrost Thermokarst wedge* Yakutia Siberia |
op_source |
Geosciences Paris-Saclay, CNRS/UPS UMR 8148 GEOPS |
op_relation |
Costard, François; Dupeyrat, Laure; Séjourné, Antoine; Bouchard, Frédéric; Fedorov, A; Saint-Bézar, Betrand (2021): Retrogressive Thaw Slumps on Ice‐Rich Permafrost Under Degradation: Results From a Large‐Scale Laboratory Simulation. Geophysical Research Letters, 48(1), e2020GL091070, https://doi.org/10.1029/2020GL091070 https://doi.pangaea.de/10.1594/PANGAEA.921498 https://doi.org/10.1594/PANGAEA.921498 |
op_rights |
CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.92149810.1029/2020GL091070 |
_version_ |
1812814559893782528 |