Dielectric properties of ice containing acid and salt impurity at microwave and low frequencies
We compare the microwave and low-frequency (LF) dielectric conductivity of natural and artificial ice as a function of impurity concentration and temperature. We find a linear dependence of conductivity on acid concentration that is independent of the type of acid. There appears to be no evidence of...
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American Geophysical Union
1993
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Online Access: | http://nora.nerc.ac.uk/id/eprint/517917/ https://doi.org/10.1029/93JB00710 |
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ftnerc:oai:nora.nerc.ac.uk:517917 2023-05-15T18:18:19+02:00 Dielectric properties of ice containing acid and salt impurity at microwave and low frequencies Moore, John C. Fujita, Shuji 1993-06 http://nora.nerc.ac.uk/id/eprint/517917/ https://doi.org/10.1029/93JB00710 unknown American Geophysical Union Moore, John C.; Fujita, Shuji. 1993 Dielectric properties of ice containing acid and salt impurity at microwave and low frequencies. Journal of Geophysical Research, 98 (B6). 9769-9780. https://doi.org/10.1029/93JB00710 <https://doi.org/10.1029/93JB00710> Publication - Article PeerReviewed 1993 ftnerc https://doi.org/10.1029/93JB00710 2023-02-04T19:45:24Z We compare the microwave and low-frequency (LF) dielectric conductivity of natural and artificial ice as a function of impurity concentration and temperature. We find a linear dependence of conductivity on acid concentration that is independent of the type of acid. There appears to be no evidence of significant dielectric dispersions between LF and 10 GHz in acid-doped ice. The results are well fitted by a model in which concentrated liquid acid at three-grain boundaries forms a network, earlier proposed as an explanation for the DC conductivity of polar ice. In contrast, evidence from ice with sea salt impurity shows large discrepancies between the microwave response of low-salinity sea ice, and both the LF and microwave responses of ice with salinities typical of meteoric ice. These discrepancies may be attributed to sea salt chloride being largely incorporated within the ice lattice in meteoric-type ice, while in higher-salinity ice most of the sea salt is contained in platelike inclusions of liquid brine. Article in Journal/Newspaper Sea ice Natural Environment Research Council: NERC Open Research Archive Journal of Geophysical Research 98 B6 9769 |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
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description |
We compare the microwave and low-frequency (LF) dielectric conductivity of natural and artificial ice as a function of impurity concentration and temperature. We find a linear dependence of conductivity on acid concentration that is independent of the type of acid. There appears to be no evidence of significant dielectric dispersions between LF and 10 GHz in acid-doped ice. The results are well fitted by a model in which concentrated liquid acid at three-grain boundaries forms a network, earlier proposed as an explanation for the DC conductivity of polar ice. In contrast, evidence from ice with sea salt impurity shows large discrepancies between the microwave response of low-salinity sea ice, and both the LF and microwave responses of ice with salinities typical of meteoric ice. These discrepancies may be attributed to sea salt chloride being largely incorporated within the ice lattice in meteoric-type ice, while in higher-salinity ice most of the sea salt is contained in platelike inclusions of liquid brine. |
format |
Article in Journal/Newspaper |
author |
Moore, John C. Fujita, Shuji |
spellingShingle |
Moore, John C. Fujita, Shuji Dielectric properties of ice containing acid and salt impurity at microwave and low frequencies |
author_facet |
Moore, John C. Fujita, Shuji |
author_sort |
Moore, John C. |
title |
Dielectric properties of ice containing acid and salt impurity at microwave and low frequencies |
title_short |
Dielectric properties of ice containing acid and salt impurity at microwave and low frequencies |
title_full |
Dielectric properties of ice containing acid and salt impurity at microwave and low frequencies |
title_fullStr |
Dielectric properties of ice containing acid and salt impurity at microwave and low frequencies |
title_full_unstemmed |
Dielectric properties of ice containing acid and salt impurity at microwave and low frequencies |
title_sort |
dielectric properties of ice containing acid and salt impurity at microwave and low frequencies |
publisher |
American Geophysical Union |
publishDate |
1993 |
url |
http://nora.nerc.ac.uk/id/eprint/517917/ https://doi.org/10.1029/93JB00710 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_relation |
Moore, John C.; Fujita, Shuji. 1993 Dielectric properties of ice containing acid and salt impurity at microwave and low frequencies. Journal of Geophysical Research, 98 (B6). 9769-9780. https://doi.org/10.1029/93JB00710 <https://doi.org/10.1029/93JB00710> |
op_doi |
https://doi.org/10.1029/93JB00710 |
container_title |
Journal of Geophysical Research |
container_volume |
98 |
container_issue |
B6 |
container_start_page |
9769 |
_version_ |
1766194869717434368 |