The thermal conductivity of seasonal snow
Abstract Twenty-seven studies on the thermal conductivity of snow ( K eff ) have been published since 1886. Combined, they comprise 354 values of K eff , and have been used to derive over 13 regression equation and predicting K eff vs density. Due to large (and largely undocumented) differences in m...
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Language: | English |
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Cambridge University Press (CUP)
1997
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Online Access: | http://dx.doi.org/10.1017/s0022143000002781 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000002781 |
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crcambridgeupr:10.1017/s0022143000002781 2024-09-15T18:15:39+00:00 The thermal conductivity of seasonal snow Sturm, Matthew Holmgren, Jon König, Max Morris, Kim 1997 http://dx.doi.org/10.1017/s0022143000002781 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000002781 en eng Cambridge University Press (CUP) Journal of Glaciology volume 43, issue 143, page 26-41 ISSN 0022-1430 1727-5652 journal-article 1997 crcambridgeupr https://doi.org/10.1017/s0022143000002781 2024-08-28T04:03:44Z Abstract Twenty-seven studies on the thermal conductivity of snow ( K eff ) have been published since 1886. Combined, they comprise 354 values of K eff , and have been used to derive over 13 regression equation and predicting K eff vs density. Due to large (and largely undocumented) differences in measurement methods and accuracy, sample temperature and snow type, it is not possible to know what part of the variability in this data set is the result of snow microstructure. We present a new data set containing 488 measurements for which the temperature, type and measurement accuracy are known. A quadratic equation, where ρ is in g cm −3 , and K eff is in W m −1 K −1 , can be fit to the new data ( R 2 = 0.79). A logarithmic expression, can also be used. The first regression is better when estimating values beyond the limits of the data; the second when estimating values for low-density snow. Within the data set, snow types resulting from kinetic growth show density-independent behavior. Rounded-grain and wind-blown snow show strong density dependence. The new data set has a higher mean value of density but a lower mean value of thermal conductivity than the old set. This shift is attributed to differences in snow types and sample temperatures in the sets. Using both data sets, we show that there are well-defined limits to the geometric configurations that natural seasonal snow can take. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 43 143 26 41 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract Twenty-seven studies on the thermal conductivity of snow ( K eff ) have been published since 1886. Combined, they comprise 354 values of K eff , and have been used to derive over 13 regression equation and predicting K eff vs density. Due to large (and largely undocumented) differences in measurement methods and accuracy, sample temperature and snow type, it is not possible to know what part of the variability in this data set is the result of snow microstructure. We present a new data set containing 488 measurements for which the temperature, type and measurement accuracy are known. A quadratic equation, where ρ is in g cm −3 , and K eff is in W m −1 K −1 , can be fit to the new data ( R 2 = 0.79). A logarithmic expression, can also be used. The first regression is better when estimating values beyond the limits of the data; the second when estimating values for low-density snow. Within the data set, snow types resulting from kinetic growth show density-independent behavior. Rounded-grain and wind-blown snow show strong density dependence. The new data set has a higher mean value of density but a lower mean value of thermal conductivity than the old set. This shift is attributed to differences in snow types and sample temperatures in the sets. Using both data sets, we show that there are well-defined limits to the geometric configurations that natural seasonal snow can take. |
format |
Article in Journal/Newspaper |
author |
Sturm, Matthew Holmgren, Jon König, Max Morris, Kim |
spellingShingle |
Sturm, Matthew Holmgren, Jon König, Max Morris, Kim The thermal conductivity of seasonal snow |
author_facet |
Sturm, Matthew Holmgren, Jon König, Max Morris, Kim |
author_sort |
Sturm, Matthew |
title |
The thermal conductivity of seasonal snow |
title_short |
The thermal conductivity of seasonal snow |
title_full |
The thermal conductivity of seasonal snow |
title_fullStr |
The thermal conductivity of seasonal snow |
title_full_unstemmed |
The thermal conductivity of seasonal snow |
title_sort |
thermal conductivity of seasonal snow |
publisher |
Cambridge University Press (CUP) |
publishDate |
1997 |
url |
http://dx.doi.org/10.1017/s0022143000002781 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000002781 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 43, issue 143, page 26-41 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000002781 |
container_title |
Journal of Glaciology |
container_volume |
43 |
container_issue |
143 |
container_start_page |
26 |
op_container_end_page |
41 |
_version_ |
1810453542677250048 |