Exploration of Thermal Bridging through Shrub Branches 1 in Alpine Snow
In the high Arctic, thermal bridging through frozen shrub branches has been demonstrated to cool the ground by up to 4°C during cold spells, affecting snow metamorphism and soil carbon and nutrients. In alpine conditions, the thermal conductivity contrast between shrub branches and snow is much less...
Published in: | Geophysical Research Letters |
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Language: | English |
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Online Access: | https://hal.science/hal-04308316 https://hal.science/hal-04308316/document https://hal.science/hal-04308316/file/GRL-ChangesAccepted.pdf https://doi.org/10.1029/2023GL105100 |
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ftinsu:oai:HAL:hal-04308316v1 2023-12-31T10:03:20+01:00 Exploration of Thermal Bridging through Shrub Branches 1 in Alpine Snow Domine, Florent Fourteau, Kévin Choler, P. Takuvik Joint International Laboratory ULAVAL-CNRS Université Laval Québec (ULaval)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) 2023 https://hal.science/hal-04308316 https://hal.science/hal-04308316/document https://hal.science/hal-04308316/file/GRL-ChangesAccepted.pdf https://doi.org/10.1029/2023GL105100 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2023GL105100 hal-04308316 https://hal.science/hal-04308316 https://hal.science/hal-04308316/document https://hal.science/hal-04308316/file/GRL-ChangesAccepted.pdf doi:10.1029/2023GL105100 info:eu-repo/semantics/OpenAccess ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.science/hal-04308316 Geophysical Research Letters, 2023, 50, pp.e2023GL105100. ⟨10.1029/2023GL105100⟩ snow alders ground temperature shrubification alpine greening [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2023 ftinsu https://doi.org/10.1029/2023GL105100 2023-12-06T17:23:04Z In the high Arctic, thermal bridging through frozen shrub branches has been demonstrated to cool the ground by up to 4°C during cold spells, affecting snow metamorphism and soil carbon and nutrients. In alpine conditions, the thermal conductivity contrast between shrub branches and snow is much less than in the Arctic, so that the importance of thermal bridging is uncertain. We explore this effect by monitoring ground temperature and liquid water content under green alders and under nearby alpine tundra in the Alps. During a January 2022 cold spell, the ground temperature at 5 cm depth under alders is 1.3°C colder than under alpine tundra. Ground water freezing under alders is complete, while water remains liquid under tundra. Finite element simulations reproduce the observed temperature difference between both sites, showing that thermal bridging does affect ground temperature also under Alpine conditions. Article in Journal/Newspaper Arctic Tundra Institut national des sciences de l'Univers: HAL-INSU Geophysical Research Letters 50 24 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
snow alders ground temperature shrubification alpine greening [SDE]Environmental Sciences |
spellingShingle |
snow alders ground temperature shrubification alpine greening [SDE]Environmental Sciences Domine, Florent Fourteau, Kévin Choler, P. Exploration of Thermal Bridging through Shrub Branches 1 in Alpine Snow |
topic_facet |
snow alders ground temperature shrubification alpine greening [SDE]Environmental Sciences |
description |
In the high Arctic, thermal bridging through frozen shrub branches has been demonstrated to cool the ground by up to 4°C during cold spells, affecting snow metamorphism and soil carbon and nutrients. In alpine conditions, the thermal conductivity contrast between shrub branches and snow is much less than in the Arctic, so that the importance of thermal bridging is uncertain. We explore this effect by monitoring ground temperature and liquid water content under green alders and under nearby alpine tundra in the Alps. During a January 2022 cold spell, the ground temperature at 5 cm depth under alders is 1.3°C colder than under alpine tundra. Ground water freezing under alders is complete, while water remains liquid under tundra. Finite element simulations reproduce the observed temperature difference between both sites, showing that thermal bridging does affect ground temperature also under Alpine conditions. |
author2 |
Takuvik Joint International Laboratory ULAVAL-CNRS Université Laval Québec (ULaval)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Domine, Florent Fourteau, Kévin Choler, P. |
author_facet |
Domine, Florent Fourteau, Kévin Choler, P. |
author_sort |
Domine, Florent |
title |
Exploration of Thermal Bridging through Shrub Branches 1 in Alpine Snow |
title_short |
Exploration of Thermal Bridging through Shrub Branches 1 in Alpine Snow |
title_full |
Exploration of Thermal Bridging through Shrub Branches 1 in Alpine Snow |
title_fullStr |
Exploration of Thermal Bridging through Shrub Branches 1 in Alpine Snow |
title_full_unstemmed |
Exploration of Thermal Bridging through Shrub Branches 1 in Alpine Snow |
title_sort |
exploration of thermal bridging through shrub branches 1 in alpine snow |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://hal.science/hal-04308316 https://hal.science/hal-04308316/document https://hal.science/hal-04308316/file/GRL-ChangesAccepted.pdf https://doi.org/10.1029/2023GL105100 |
genre |
Arctic Tundra |
genre_facet |
Arctic Tundra |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.science/hal-04308316 Geophysical Research Letters, 2023, 50, pp.e2023GL105100. ⟨10.1029/2023GL105100⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2023GL105100 hal-04308316 https://hal.science/hal-04308316 https://hal.science/hal-04308316/document https://hal.science/hal-04308316/file/GRL-ChangesAccepted.pdf doi:10.1029/2023GL105100 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2023GL105100 |
container_title |
Geophysical Research Letters |
container_volume |
50 |
container_issue |
24 |
_version_ |
1786820591530016768 |