Supercooled interfacial water in fine-grained soils probed by dielectric spectroscopy
Water substantially affects nearly all physical, chemical and biological processes on the Earth. Recent Mars observations as well as laboratory investigations suggest that water is a key factor of current physical and chemical processes on the Martian surface, e.g. rheological phenomena. Therefore i...
Published in: | The Cryosphere |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2013
|
Subjects: | |
Online Access: | https://doi.org/10.5194/tc-7-1839-2013 http://www.the-cryosphere.net/7/1839/2013/tc-7-1839-2013.pdf https://doaj.org/article/8c9ef360a0214b468ca292cb08b55ace |
id |
fttriple:oai:gotriple.eu:oai:doaj.org/article:8c9ef360a0214b468ca292cb08b55ace |
---|---|
record_format |
openpolar |
spelling |
fttriple:oai:gotriple.eu:oai:doaj.org/article:8c9ef360a0214b468ca292cb08b55ace 2023-05-15T18:32:21+02:00 Supercooled interfacial water in fine-grained soils probed by dielectric spectroscopy A. Lorek N. Wagner 2013-12-01 https://doi.org/10.5194/tc-7-1839-2013 http://www.the-cryosphere.net/7/1839/2013/tc-7-1839-2013.pdf https://doaj.org/article/8c9ef360a0214b468ca292cb08b55ace en eng Copernicus Publications 1994-0416 1994-0424 doi:10.5194/tc-7-1839-2013 http://www.the-cryosphere.net/7/1839/2013/tc-7-1839-2013.pdf https://doaj.org/article/8c9ef360a0214b468ca292cb08b55ace undefined The Cryosphere, Vol 7, Iss 6, Pp 1839-1855 (2013) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2013 fttriple https://doi.org/10.5194/tc-7-1839-2013 2023-01-22T19:19:06Z Water substantially affects nearly all physical, chemical and biological processes on the Earth. Recent Mars observations as well as laboratory investigations suggest that water is a key factor of current physical and chemical processes on the Martian surface, e.g. rheological phenomena. Therefore it is of particular interest to get information about the liquid-like state of water on Martian analogue soils for temperatures below 0 °C. To this end, a parallel plate capacitor has been developed to obtain isothermal dielectric spectra of fine-grained soils in the frequency range from 10 Hz to 1.1 MHz at Martian-like temperatures down to −70 °C. Two Martian analogue soils have been investigated: a Ca-bentonite (specific surface of 237 m2 g−1, up to 9.4% w / w gravimetric water content) and JSC Mars 1, a volcanic ash (specific surface of 146 m2 g−1, up to 7.4% w / w). Three soil-specific relaxation processes are observed in the investigated frequency–temperature range: two weak high-frequency processes (bound or hydrated water as well as ice) and a strong low-frequency process due to counter-ion relaxation and the Maxwell–Wagner effect. To characterize the dielectric relaxation behaviour, a generalized fractional dielectric relaxation model was applied assuming three active relaxation processes with relaxation time of the ith process modelled with an Eyring equation. The real part of effective complex soil permittivity at 350 kHz was used to determine ice and liquid-like water content by means of the Birchak or CRIM equation. There are evidence that bentonite down to −70 °C has a liquid-like water content of 1.17 monolayers and JSC Mars 1 a liquid-like water content of 1.96 monolayers. Article in Journal/Newspaper The Cryosphere Unknown The Cryosphere 7 6 1839 1855 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
geo envir |
spellingShingle |
geo envir A. Lorek N. Wagner Supercooled interfacial water in fine-grained soils probed by dielectric spectroscopy |
topic_facet |
geo envir |
description |
Water substantially affects nearly all physical, chemical and biological processes on the Earth. Recent Mars observations as well as laboratory investigations suggest that water is a key factor of current physical and chemical processes on the Martian surface, e.g. rheological phenomena. Therefore it is of particular interest to get information about the liquid-like state of water on Martian analogue soils for temperatures below 0 °C. To this end, a parallel plate capacitor has been developed to obtain isothermal dielectric spectra of fine-grained soils in the frequency range from 10 Hz to 1.1 MHz at Martian-like temperatures down to −70 °C. Two Martian analogue soils have been investigated: a Ca-bentonite (specific surface of 237 m2 g−1, up to 9.4% w / w gravimetric water content) and JSC Mars 1, a volcanic ash (specific surface of 146 m2 g−1, up to 7.4% w / w). Three soil-specific relaxation processes are observed in the investigated frequency–temperature range: two weak high-frequency processes (bound or hydrated water as well as ice) and a strong low-frequency process due to counter-ion relaxation and the Maxwell–Wagner effect. To characterize the dielectric relaxation behaviour, a generalized fractional dielectric relaxation model was applied assuming three active relaxation processes with relaxation time of the ith process modelled with an Eyring equation. The real part of effective complex soil permittivity at 350 kHz was used to determine ice and liquid-like water content by means of the Birchak or CRIM equation. There are evidence that bentonite down to −70 °C has a liquid-like water content of 1.17 monolayers and JSC Mars 1 a liquid-like water content of 1.96 monolayers. |
format |
Article in Journal/Newspaper |
author |
A. Lorek N. Wagner |
author_facet |
A. Lorek N. Wagner |
author_sort |
A. Lorek |
title |
Supercooled interfacial water in fine-grained soils probed by dielectric spectroscopy |
title_short |
Supercooled interfacial water in fine-grained soils probed by dielectric spectroscopy |
title_full |
Supercooled interfacial water in fine-grained soils probed by dielectric spectroscopy |
title_fullStr |
Supercooled interfacial water in fine-grained soils probed by dielectric spectroscopy |
title_full_unstemmed |
Supercooled interfacial water in fine-grained soils probed by dielectric spectroscopy |
title_sort |
supercooled interfacial water in fine-grained soils probed by dielectric spectroscopy |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://doi.org/10.5194/tc-7-1839-2013 http://www.the-cryosphere.net/7/1839/2013/tc-7-1839-2013.pdf https://doaj.org/article/8c9ef360a0214b468ca292cb08b55ace |
genre |
The Cryosphere |
genre_facet |
The Cryosphere |
op_source |
The Cryosphere, Vol 7, Iss 6, Pp 1839-1855 (2013) |
op_relation |
1994-0416 1994-0424 doi:10.5194/tc-7-1839-2013 http://www.the-cryosphere.net/7/1839/2013/tc-7-1839-2013.pdf https://doaj.org/article/8c9ef360a0214b468ca292cb08b55ace |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-7-1839-2013 |
container_title |
The Cryosphere |
container_volume |
7 |
container_issue |
6 |
container_start_page |
1839 |
op_container_end_page |
1855 |
_version_ |
1766216450363621376 |