Frost boils and soil ice content: field observations
Abstract Our aim is to measure and explain the seasonal changes in soil ice content in the frost boils of Galbraith Lake, Alaska. Instruments were installed in a frost boil to monitor the ground surface position and soil state over a period of 4 years. By comparing the subsidence and thaw rates, we...
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crwiley:10.1002/ppp.567 2024-09-09T20:03:24+00:00 Frost boils and soil ice content: field observations Overduin, P. P. Kane, D. L. 2006 http://dx.doi.org/10.1002/ppp.567 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.567 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.567 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Permafrost and Periglacial Processes volume 17, issue 4, page 291-307 ISSN 1045-6740 1099-1530 journal-article 2006 crwiley https://doi.org/10.1002/ppp.567 2024-06-20T04:27:15Z Abstract Our aim is to measure and explain the seasonal changes in soil ice content in the frost boils of Galbraith Lake, Alaska. Instruments were installed in a frost boil to monitor the ground surface position and soil state over a period of 4 years. By comparing the subsidence and thaw rates, we calculate the soil ice content as a function of depth. Measured soil temperatures, liquid water contents and bulk apparent thermal conductivities are used to estimate latent heat production and release in the soil. The frost boil heaves during freezing and settles during thaw while the surrounding tundra heaves negligibly, but subsides measurably. Despite large changes in freezing rates from year to year, total heave and its distribution across the frost boil are similar between years. Winter air temperature and snow depth influence the freezing rate and ice distribution as a function of depth, but not the overall heave. This suggests that heave is controlled by water availability rather than the rate of heat removal from the soil. Areal ground subsidence rates between 2 and 5 cm/yr are due to the disappearance of ice at the base of the active layer, raising the possibility of ongoing thermokarst expansion around Galbraith Lake. Copyright © 2006 John Wiley & Sons, Ltd. Article in Journal/Newspaper Permafrost and Periglacial Processes Thermokarst Tundra Alaska Wiley Online Library Galbraith Lake ENVELOPE(-101.905,-101.905,55.591,55.591) Permafrost and Periglacial Processes 17 4 291 307 |
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Wiley Online Library |
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crwiley |
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English |
description |
Abstract Our aim is to measure and explain the seasonal changes in soil ice content in the frost boils of Galbraith Lake, Alaska. Instruments were installed in a frost boil to monitor the ground surface position and soil state over a period of 4 years. By comparing the subsidence and thaw rates, we calculate the soil ice content as a function of depth. Measured soil temperatures, liquid water contents and bulk apparent thermal conductivities are used to estimate latent heat production and release in the soil. The frost boil heaves during freezing and settles during thaw while the surrounding tundra heaves negligibly, but subsides measurably. Despite large changes in freezing rates from year to year, total heave and its distribution across the frost boil are similar between years. Winter air temperature and snow depth influence the freezing rate and ice distribution as a function of depth, but not the overall heave. This suggests that heave is controlled by water availability rather than the rate of heat removal from the soil. Areal ground subsidence rates between 2 and 5 cm/yr are due to the disappearance of ice at the base of the active layer, raising the possibility of ongoing thermokarst expansion around Galbraith Lake. Copyright © 2006 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Overduin, P. P. Kane, D. L. |
spellingShingle |
Overduin, P. P. Kane, D. L. Frost boils and soil ice content: field observations |
author_facet |
Overduin, P. P. Kane, D. L. |
author_sort |
Overduin, P. P. |
title |
Frost boils and soil ice content: field observations |
title_short |
Frost boils and soil ice content: field observations |
title_full |
Frost boils and soil ice content: field observations |
title_fullStr |
Frost boils and soil ice content: field observations |
title_full_unstemmed |
Frost boils and soil ice content: field observations |
title_sort |
frost boils and soil ice content: field observations |
publisher |
Wiley |
publishDate |
2006 |
url |
http://dx.doi.org/10.1002/ppp.567 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.567 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.567 |
long_lat |
ENVELOPE(-101.905,-101.905,55.591,55.591) |
geographic |
Galbraith Lake |
geographic_facet |
Galbraith Lake |
genre |
Permafrost and Periglacial Processes Thermokarst Tundra Alaska |
genre_facet |
Permafrost and Periglacial Processes Thermokarst Tundra Alaska |
op_source |
Permafrost and Periglacial Processes volume 17, issue 4, page 291-307 ISSN 1045-6740 1099-1530 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/ppp.567 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
17 |
container_issue |
4 |
container_start_page |
291 |
op_container_end_page |
307 |
_version_ |
1809935354924367872 |