Ice‐ and Soil‐Wedge Dynamics in the Kapp Linné Area, Svalbard, Investigated by Two‐ and Three‐Dimensional GPR and Ground Thermal and Acceleration Regimes
ABSTRACT GPR is applied to image subsurface structures below non‐sorted polygons in Kapp Linné, Svalbard, where ice and active‐layer soil wedges co‐exist within a small area. Two‐dimensional GPR images ice wedges as hyperbolic reflections extending down from the frost table. However, some ice‐wedge...
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crwiley:10.1002/ppp.1767 2024-06-02T08:08:01+00:00 Ice‐ and Soil‐Wedge Dynamics in the Kapp Linné Area, Svalbard, Investigated by Two‐ and Three‐Dimensional GPR and Ground Thermal and Acceleration Regimes Watanabe, Tatsuya Matsuoka, Norikazu Christiansen, Hanne H. 2013 http://dx.doi.org/10.1002/ppp.1767 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.1767 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.1767 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Permafrost and Periglacial Processes volume 24, issue 1, page 39-55 ISSN 1045-6740 1099-1530 journal-article 2013 crwiley https://doi.org/10.1002/ppp.1767 2024-05-03T12:01:39Z ABSTRACT GPR is applied to image subsurface structures below non‐sorted polygons in Kapp Linné, Svalbard, where ice and active‐layer soil wedges co‐exist within a small area. Two‐dimensional GPR images ice wedges as hyperbolic reflections extending down from the frost table. However, some ice‐wedge signals are obscured or masked by similar hyperbolic reflections produced by stones or active‐layer soil wedges. Three‐dimensional GPR images ice wedges as linear amplitude anomalies, which excludes the possibility of misinterpretation and offers more reliable results. GPR investigations show that ice wedges are distributed sporadically in lower (younger) beach ridges, but not in higher (older) ones. Inter‐site monitoring of ground temperature, soil moisture, slow ground deformation and cracking during 2004–09 and the determination of near‐surface soil texture and stratigraphy suggest that snow cover and soil thermal properties determine the distribution of ice wedges. Most ice wedges are considered to be inactive due to relatively high permafrost temperatures. Shock loggers and extensometers detected shallow (soil wedge) cracking in sandy sediments, when the ground surface temperature dropped to −12°C and the thermal gradient in the upper 20 cm of ground reached −10°C m −1 . Copyright © 2013 John Wiley & Sons, Ltd. Article in Journal/Newspaper Ice permafrost Permafrost and Periglacial Processes Svalbard wedge* Wiley Online Library Kapp Linné ENVELOPE(13.621,13.621,78.063,78.063) Svalbard Permafrost and Periglacial Processes 24 1 39 55 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
ABSTRACT GPR is applied to image subsurface structures below non‐sorted polygons in Kapp Linné, Svalbard, where ice and active‐layer soil wedges co‐exist within a small area. Two‐dimensional GPR images ice wedges as hyperbolic reflections extending down from the frost table. However, some ice‐wedge signals are obscured or masked by similar hyperbolic reflections produced by stones or active‐layer soil wedges. Three‐dimensional GPR images ice wedges as linear amplitude anomalies, which excludes the possibility of misinterpretation and offers more reliable results. GPR investigations show that ice wedges are distributed sporadically in lower (younger) beach ridges, but not in higher (older) ones. Inter‐site monitoring of ground temperature, soil moisture, slow ground deformation and cracking during 2004–09 and the determination of near‐surface soil texture and stratigraphy suggest that snow cover and soil thermal properties determine the distribution of ice wedges. Most ice wedges are considered to be inactive due to relatively high permafrost temperatures. Shock loggers and extensometers detected shallow (soil wedge) cracking in sandy sediments, when the ground surface temperature dropped to −12°C and the thermal gradient in the upper 20 cm of ground reached −10°C m −1 . Copyright © 2013 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Watanabe, Tatsuya Matsuoka, Norikazu Christiansen, Hanne H. |
spellingShingle |
Watanabe, Tatsuya Matsuoka, Norikazu Christiansen, Hanne H. Ice‐ and Soil‐Wedge Dynamics in the Kapp Linné Area, Svalbard, Investigated by Two‐ and Three‐Dimensional GPR and Ground Thermal and Acceleration Regimes |
author_facet |
Watanabe, Tatsuya Matsuoka, Norikazu Christiansen, Hanne H. |
author_sort |
Watanabe, Tatsuya |
title |
Ice‐ and Soil‐Wedge Dynamics in the Kapp Linné Area, Svalbard, Investigated by Two‐ and Three‐Dimensional GPR and Ground Thermal and Acceleration Regimes |
title_short |
Ice‐ and Soil‐Wedge Dynamics in the Kapp Linné Area, Svalbard, Investigated by Two‐ and Three‐Dimensional GPR and Ground Thermal and Acceleration Regimes |
title_full |
Ice‐ and Soil‐Wedge Dynamics in the Kapp Linné Area, Svalbard, Investigated by Two‐ and Three‐Dimensional GPR and Ground Thermal and Acceleration Regimes |
title_fullStr |
Ice‐ and Soil‐Wedge Dynamics in the Kapp Linné Area, Svalbard, Investigated by Two‐ and Three‐Dimensional GPR and Ground Thermal and Acceleration Regimes |
title_full_unstemmed |
Ice‐ and Soil‐Wedge Dynamics in the Kapp Linné Area, Svalbard, Investigated by Two‐ and Three‐Dimensional GPR and Ground Thermal and Acceleration Regimes |
title_sort |
ice‐ and soil‐wedge dynamics in the kapp linné area, svalbard, investigated by two‐ and three‐dimensional gpr and ground thermal and acceleration regimes |
publisher |
Wiley |
publishDate |
2013 |
url |
http://dx.doi.org/10.1002/ppp.1767 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.1767 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.1767 |
long_lat |
ENVELOPE(13.621,13.621,78.063,78.063) |
geographic |
Kapp Linné Svalbard |
geographic_facet |
Kapp Linné Svalbard |
genre |
Ice permafrost Permafrost and Periglacial Processes Svalbard wedge* |
genre_facet |
Ice permafrost Permafrost and Periglacial Processes Svalbard wedge* |
op_source |
Permafrost and Periglacial Processes volume 24, issue 1, page 39-55 ISSN 1045-6740 1099-1530 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/ppp.1767 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
24 |
container_issue |
1 |
container_start_page |
39 |
op_container_end_page |
55 |
_version_ |
1800753164567183360 |