Mixing Formulae and Experimental Results for the Dielectric Constant of Snow
Abstract This paper discusses dielectric properties of snow according to various dielectric models and compares them with experimental results. The complex permittivity of wet snow is assumed to consist of two parts, being the sum of the permittivity of dry snow (a mixture of ice and air) and the ex...
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Cambridge University Press (CUP)
1985
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Online Access: | http://dx.doi.org/10.1017/s0022143000006419 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000006419 |
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crcambridgeupr:10.1017/s0022143000006419 2024-06-23T07:54:15+00:00 Mixing Formulae and Experimental Results for the Dielectric Constant of Snow Sihvola, Ari Nyfors, Ebbe Tiuri, Martti 1985 http://dx.doi.org/10.1017/s0022143000006419 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000006419 en eng Cambridge University Press (CUP) Journal of Glaciology volume 31, issue 108, page 163-170 ISSN 0022-1430 1727-5652 journal-article 1985 crcambridgeupr https://doi.org/10.1017/s0022143000006419 2024-06-05T04:04:57Z Abstract This paper discusses dielectric properties of snow according to various dielectric models and compares them with experimental results. The complex permittivity of wet snow is assumed to consist of two parts, being the sum of the permittivity of dry snow (a mixture of ice and air) and the excess permittivity due to liquid water (resulting from the dielectric mixture of water and air). In particular the effect of liquid water is considered. Exponential models and structure-dependent models based on mixture theories by Taylor and Tinga and others are applied. It is shown that the assumption that water inclusions have the form of either randomly oriented discs or needles, or of spheres do, not get empirical confirmation but the inclusions are preferably prolate ellipsoids (ellipticity 0.16) or oblate ellipsoids (ellipticity 0.12), dry snow being a dielectric mixture of randomly oriented disc-shaped ice particles and air. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 31 108 163 170 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract This paper discusses dielectric properties of snow according to various dielectric models and compares them with experimental results. The complex permittivity of wet snow is assumed to consist of two parts, being the sum of the permittivity of dry snow (a mixture of ice and air) and the excess permittivity due to liquid water (resulting from the dielectric mixture of water and air). In particular the effect of liquid water is considered. Exponential models and structure-dependent models based on mixture theories by Taylor and Tinga and others are applied. It is shown that the assumption that water inclusions have the form of either randomly oriented discs or needles, or of spheres do, not get empirical confirmation but the inclusions are preferably prolate ellipsoids (ellipticity 0.16) or oblate ellipsoids (ellipticity 0.12), dry snow being a dielectric mixture of randomly oriented disc-shaped ice particles and air. |
format |
Article in Journal/Newspaper |
author |
Sihvola, Ari Nyfors, Ebbe Tiuri, Martti |
spellingShingle |
Sihvola, Ari Nyfors, Ebbe Tiuri, Martti Mixing Formulae and Experimental Results for the Dielectric Constant of Snow |
author_facet |
Sihvola, Ari Nyfors, Ebbe Tiuri, Martti |
author_sort |
Sihvola, Ari |
title |
Mixing Formulae and Experimental Results for the Dielectric Constant of Snow |
title_short |
Mixing Formulae and Experimental Results for the Dielectric Constant of Snow |
title_full |
Mixing Formulae and Experimental Results for the Dielectric Constant of Snow |
title_fullStr |
Mixing Formulae and Experimental Results for the Dielectric Constant of Snow |
title_full_unstemmed |
Mixing Formulae and Experimental Results for the Dielectric Constant of Snow |
title_sort |
mixing formulae and experimental results for the dielectric constant of snow |
publisher |
Cambridge University Press (CUP) |
publishDate |
1985 |
url |
http://dx.doi.org/10.1017/s0022143000006419 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000006419 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 31, issue 108, page 163-170 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000006419 |
container_title |
Journal of Glaciology |
container_volume |
31 |
container_issue |
108 |
container_start_page |
163 |
op_container_end_page |
170 |
_version_ |
1802646328993382400 |