Experimental design for a pilot study on bedrock weathering near the permafrost table
An experimental design is described to test the hypothesis that ice segregation near the top of permafrost and in the lower part of the active layer can brecciate frost-susceptible bedrock. Seasonal temperature cycles in the active layer and the top of permafrost were simulated to a first approximat...
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ftunivsussex:oai:sro.sussex.ac.uk:12079 2023-07-30T03:55:25+02:00 Experimental design for a pilot study on bedrock weathering near the permafrost table Murton, Julian B Coutard, Jean-Pierre Lautridou, Jean-Pierre Ozouf, Jean-Claude Robinson, David A Williams, Rendel B G Guillemet, Gerard Simmons, Peter 2000-11 http://sro.sussex.ac.uk/id/eprint/12079/ https://doi.org/10.1002/1096-9837(200011 unknown Murton, Julian B, Coutard, Jean-Pierre, Lautridou, Jean-Pierre, Ozouf, Jean-Claude, Robinson, David A, Williams, Rendel B G, Guillemet, Gerard and Simmons, Peter (2000) Experimental design for a pilot study on bedrock weathering near the permafrost table. Earth Surface Processes and Landforms, 25 (12). pp. 1281-1294. ISSN 0197-9337 Article PeerReviewed 2000 ftunivsussex https://doi.org/10.1002/1096-9837(200011 2023-07-11T20:09:28Z An experimental design is described to test the hypothesis that ice segregation near the top of permafrost and in the lower part of the active layer can brecciate frost-susceptible bedrock. Seasonal temperature cycles in the active layer and the top of permafrost were simulated to a first approximation within a block of chalk measuring 30 m × 31 m wide and 33 m high and insulated around the sides to minimize lateral heat transfer. The block, moistened first by capillary rise, was initially frozen from the surface downwards, simulating permafrost aggradation. Thereafter, the upper half of the block was cycled above and below 0°C (simulating seasonal freezing and thawing of the active layer) while the lower half remained below 0°C (simulating permafrost). During thaw cycles water was supplied to the surface and base of the simulated active layer. Temperature, unfrozen water content, surface frost heave and porewater pressure within the chalk were monitored during the experiment. Article in Journal/Newspaper Active layer temperature Ice permafrost University of Sussex: Sussex Research Online |
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Open Polar |
collection |
University of Sussex: Sussex Research Online |
op_collection_id |
ftunivsussex |
language |
unknown |
description |
An experimental design is described to test the hypothesis that ice segregation near the top of permafrost and in the lower part of the active layer can brecciate frost-susceptible bedrock. Seasonal temperature cycles in the active layer and the top of permafrost were simulated to a first approximation within a block of chalk measuring 30 m × 31 m wide and 33 m high and insulated around the sides to minimize lateral heat transfer. The block, moistened first by capillary rise, was initially frozen from the surface downwards, simulating permafrost aggradation. Thereafter, the upper half of the block was cycled above and below 0°C (simulating seasonal freezing and thawing of the active layer) while the lower half remained below 0°C (simulating permafrost). During thaw cycles water was supplied to the surface and base of the simulated active layer. Temperature, unfrozen water content, surface frost heave and porewater pressure within the chalk were monitored during the experiment. |
format |
Article in Journal/Newspaper |
author |
Murton, Julian B Coutard, Jean-Pierre Lautridou, Jean-Pierre Ozouf, Jean-Claude Robinson, David A Williams, Rendel B G Guillemet, Gerard Simmons, Peter |
spellingShingle |
Murton, Julian B Coutard, Jean-Pierre Lautridou, Jean-Pierre Ozouf, Jean-Claude Robinson, David A Williams, Rendel B G Guillemet, Gerard Simmons, Peter Experimental design for a pilot study on bedrock weathering near the permafrost table |
author_facet |
Murton, Julian B Coutard, Jean-Pierre Lautridou, Jean-Pierre Ozouf, Jean-Claude Robinson, David A Williams, Rendel B G Guillemet, Gerard Simmons, Peter |
author_sort |
Murton, Julian B |
title |
Experimental design for a pilot study on bedrock weathering near the permafrost table |
title_short |
Experimental design for a pilot study on bedrock weathering near the permafrost table |
title_full |
Experimental design for a pilot study on bedrock weathering near the permafrost table |
title_fullStr |
Experimental design for a pilot study on bedrock weathering near the permafrost table |
title_full_unstemmed |
Experimental design for a pilot study on bedrock weathering near the permafrost table |
title_sort |
experimental design for a pilot study on bedrock weathering near the permafrost table |
publishDate |
2000 |
url |
http://sro.sussex.ac.uk/id/eprint/12079/ https://doi.org/10.1002/1096-9837(200011 |
genre |
Active layer temperature Ice permafrost |
genre_facet |
Active layer temperature Ice permafrost |
op_relation |
Murton, Julian B, Coutard, Jean-Pierre, Lautridou, Jean-Pierre, Ozouf, Jean-Claude, Robinson, David A, Williams, Rendel B G, Guillemet, Gerard and Simmons, Peter (2000) Experimental design for a pilot study on bedrock weathering near the permafrost table. Earth Surface Processes and Landforms, 25 (12). pp. 1281-1294. ISSN 0197-9337 |
op_doi |
https://doi.org/10.1002/1096-9837(200011 |
_version_ |
1772811491123134464 |