Geophysical Monitoring Shows that Spatial Heterogeneity in Thermohydrological Dynamics Reshapes a Transitional Permafrost System ...
Climate change is causing rapid changes of Arctic ecosystems. Yet, data needed to unravel complex subsurface processes are very rare. Using geophysical and in situ sensing, this study closes an observational gap associated with thermohydrological dynamics in discontinuous permafrost systems. It high...
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Online Access: | https://dx.doi.org/10.3929/ethz-b-000477373 http://hdl.handle.net/20.500.11850/477373 |
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ftdatacite:10.3929/ethz-b-000477373 2024-04-28T08:08:24+00:00 Geophysical Monitoring Shows that Spatial Heterogeneity in Thermohydrological Dynamics Reshapes a Transitional Permafrost System ... Uhlemann, Sebastian Dafflon, Baptiste Peterson, John E. Ulrich, Craig Shirley, Ian Michail, Sofia Hubbard, Susan S. 2021 application/pdf https://dx.doi.org/10.3929/ethz-b-000477373 http://hdl.handle.net/20.500.11850/477373 en eng ETH Zurich info:eu-repo/semantics/openAccess Creative Commons Attribution Non Commercial 4.0 International https://creativecommons.org/licenses/by-nc/4.0/legalcode cc-by-nc-4.0 article-journal Text ScholarlyArticle Journal Article 2021 ftdatacite https://doi.org/10.3929/ethz-b-000477373 2024-04-02T12:34:54Z Climate change is causing rapid changes of Arctic ecosystems. Yet, data needed to unravel complex subsurface processes are very rare. Using geophysical and in situ sensing, this study closes an observational gap associated with thermohydrological dynamics in discontinuous permafrost systems. It highlights the impact of vegetation and snow thickness distribution on subsurface thermohydrological properties and processes. Large snow accumulation near tall shrubs insulates the ground and allows for rapid and downward heat flow. Thinner snow pack above graminoid results in surficial freezing and prevents water from infiltrating into the subsurface. Analyzing short‐term disturbances, we found that lateral flow could be a driving factor in talik formation. Interannual measurements show that deep permafrost temperatures increased by about 0.2°C over 2 years. The results, which suggest that snow‐vegetation‐subsurface processes are tightly coupled, will be useful for improving predictions of Arctic feedback to climate ... : Geophysical Research Letters, 48 (6) ... Article in Journal/Newspaper Arctic Climate change permafrost DataCite Metadata Store (German National Library of Science and Technology) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
description |
Climate change is causing rapid changes of Arctic ecosystems. Yet, data needed to unravel complex subsurface processes are very rare. Using geophysical and in situ sensing, this study closes an observational gap associated with thermohydrological dynamics in discontinuous permafrost systems. It highlights the impact of vegetation and snow thickness distribution on subsurface thermohydrological properties and processes. Large snow accumulation near tall shrubs insulates the ground and allows for rapid and downward heat flow. Thinner snow pack above graminoid results in surficial freezing and prevents water from infiltrating into the subsurface. Analyzing short‐term disturbances, we found that lateral flow could be a driving factor in talik formation. Interannual measurements show that deep permafrost temperatures increased by about 0.2°C over 2 years. The results, which suggest that snow‐vegetation‐subsurface processes are tightly coupled, will be useful for improving predictions of Arctic feedback to climate ... : Geophysical Research Letters, 48 (6) ... |
format |
Article in Journal/Newspaper |
author |
Uhlemann, Sebastian Dafflon, Baptiste Peterson, John E. Ulrich, Craig Shirley, Ian Michail, Sofia Hubbard, Susan S. |
spellingShingle |
Uhlemann, Sebastian Dafflon, Baptiste Peterson, John E. Ulrich, Craig Shirley, Ian Michail, Sofia Hubbard, Susan S. Geophysical Monitoring Shows that Spatial Heterogeneity in Thermohydrological Dynamics Reshapes a Transitional Permafrost System ... |
author_facet |
Uhlemann, Sebastian Dafflon, Baptiste Peterson, John E. Ulrich, Craig Shirley, Ian Michail, Sofia Hubbard, Susan S. |
author_sort |
Uhlemann, Sebastian |
title |
Geophysical Monitoring Shows that Spatial Heterogeneity in Thermohydrological Dynamics Reshapes a Transitional Permafrost System ... |
title_short |
Geophysical Monitoring Shows that Spatial Heterogeneity in Thermohydrological Dynamics Reshapes a Transitional Permafrost System ... |
title_full |
Geophysical Monitoring Shows that Spatial Heterogeneity in Thermohydrological Dynamics Reshapes a Transitional Permafrost System ... |
title_fullStr |
Geophysical Monitoring Shows that Spatial Heterogeneity in Thermohydrological Dynamics Reshapes a Transitional Permafrost System ... |
title_full_unstemmed |
Geophysical Monitoring Shows that Spatial Heterogeneity in Thermohydrological Dynamics Reshapes a Transitional Permafrost System ... |
title_sort |
geophysical monitoring shows that spatial heterogeneity in thermohydrological dynamics reshapes a transitional permafrost system ... |
publisher |
ETH Zurich |
publishDate |
2021 |
url |
https://dx.doi.org/10.3929/ethz-b-000477373 http://hdl.handle.net/20.500.11850/477373 |
genre |
Arctic Climate change permafrost |
genre_facet |
Arctic Climate change permafrost |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution Non Commercial 4.0 International https://creativecommons.org/licenses/by-nc/4.0/legalcode cc-by-nc-4.0 |
op_doi |
https://doi.org/10.3929/ethz-b-000477373 |
_version_ |
1797577216668729344 |