Thermal Conductivity of Snow on Arctic Sea Ice
Snow significantly impacts the seasonal growth of Arctic sea ice due to its thermally insulating properties. Various measurements and parametrizations of thermal properties exist, but an assessment of the entire seasonal evolution of thermal conductivity and snow resistance is hitherto lacking. Usin...
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Copernicus Publications
2023
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00064824 2023-05-15T14:54:15+02:00 Thermal Conductivity of Snow on Arctic Sea Ice Macfarlane, Amy R. Löwe, Henning Gimenes, Lucille Wagner, David N. Dadic, Ruzica Ottersberg, Rafael Hämmerle, Stefan Schneebeli, Martin 2023-02 electronic https://doi.org/10.5194/egusphere-2023-83 https://noa.gwlb.de/receive/cop_mods_00064824 https://egusphere.copernicus.org/preprints/egusphere-2023-83/egusphere-2023-83.pdf eng eng Copernicus Publications https://doi.org/10.5194/egusphere-2023-83 https://noa.gwlb.de/receive/cop_mods_00064824 https://egusphere.copernicus.org/preprints/egusphere-2023-83/egusphere-2023-83.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/restrictedAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2023 ftnonlinearchiv https://doi.org/10.5194/egusphere-2023-83 2023-02-06T00:14:01Z Snow significantly impacts the seasonal growth of Arctic sea ice due to its thermally insulating properties. Various measurements and parametrizations of thermal properties exist, but an assessment of the entire seasonal evolution of thermal conductivity and snow resistance is hitherto lacking. Using the comprehensive snow data set from the MOSAiC expedition, we have evaluated for the first time the seasonal evolution of the snow's thermal conductivity and thermal resistance on different ice ages (leads, first and second-year ice) and topographic features (ridges). Combining different measurement parametrizations and assessing the robustness against spatial variability, we infer and quantify a hitherto undocumented feature in the seasonal dynamics of snow on sea ice. We observe an increase in thermal conductivity up to March and a decrease thereafter, both on first-year and second-year ice before the melt period started. Since a similar non-monotonic behaviour is extracted for the snow depth, the thermal resistance of snow on level sea ice remains approximately constant with a value of 515 ± 404 m2 K W−1 on first-year ice and 660 ± 475m2 K W−1 on second-year ice. We found approximately three times higher thermal resistance on ridges (1411 ± 910 m2 K W−1). Our findings are that the micropenetrometer-derived thermal conductivities give accurate values, and confirm that spatial variability of the snow cover is vertically and horizontally large. The implications of our findings for Arctic sea ice are discussed. Article in Journal/Newspaper Arctic Sea ice Niedersächsisches Online-Archiv NOA Arctic |
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English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Macfarlane, Amy R. Löwe, Henning Gimenes, Lucille Wagner, David N. Dadic, Ruzica Ottersberg, Rafael Hämmerle, Stefan Schneebeli, Martin Thermal Conductivity of Snow on Arctic Sea Ice |
topic_facet |
article Verlagsveröffentlichung |
description |
Snow significantly impacts the seasonal growth of Arctic sea ice due to its thermally insulating properties. Various measurements and parametrizations of thermal properties exist, but an assessment of the entire seasonal evolution of thermal conductivity and snow resistance is hitherto lacking. Using the comprehensive snow data set from the MOSAiC expedition, we have evaluated for the first time the seasonal evolution of the snow's thermal conductivity and thermal resistance on different ice ages (leads, first and second-year ice) and topographic features (ridges). Combining different measurement parametrizations and assessing the robustness against spatial variability, we infer and quantify a hitherto undocumented feature in the seasonal dynamics of snow on sea ice. We observe an increase in thermal conductivity up to March and a decrease thereafter, both on first-year and second-year ice before the melt period started. Since a similar non-monotonic behaviour is extracted for the snow depth, the thermal resistance of snow on level sea ice remains approximately constant with a value of 515 ± 404 m2 K W−1 on first-year ice and 660 ± 475m2 K W−1 on second-year ice. We found approximately three times higher thermal resistance on ridges (1411 ± 910 m2 K W−1). Our findings are that the micropenetrometer-derived thermal conductivities give accurate values, and confirm that spatial variability of the snow cover is vertically and horizontally large. The implications of our findings for Arctic sea ice are discussed. |
format |
Article in Journal/Newspaper |
author |
Macfarlane, Amy R. Löwe, Henning Gimenes, Lucille Wagner, David N. Dadic, Ruzica Ottersberg, Rafael Hämmerle, Stefan Schneebeli, Martin |
author_facet |
Macfarlane, Amy R. Löwe, Henning Gimenes, Lucille Wagner, David N. Dadic, Ruzica Ottersberg, Rafael Hämmerle, Stefan Schneebeli, Martin |
author_sort |
Macfarlane, Amy R. |
title |
Thermal Conductivity of Snow on Arctic Sea Ice |
title_short |
Thermal Conductivity of Snow on Arctic Sea Ice |
title_full |
Thermal Conductivity of Snow on Arctic Sea Ice |
title_fullStr |
Thermal Conductivity of Snow on Arctic Sea Ice |
title_full_unstemmed |
Thermal Conductivity of Snow on Arctic Sea Ice |
title_sort |
thermal conductivity of snow on arctic sea ice |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/egusphere-2023-83 https://noa.gwlb.de/receive/cop_mods_00064824 https://egusphere.copernicus.org/preprints/egusphere-2023-83/egusphere-2023-83.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_relation |
https://doi.org/10.5194/egusphere-2023-83 https://noa.gwlb.de/receive/cop_mods_00064824 https://egusphere.copernicus.org/preprints/egusphere-2023-83/egusphere-2023-83.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/restrictedAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/egusphere-2023-83 |
_version_ |
1766325981539205120 |