Impacts of Vegetation on the Decoupling between Air and Soil Temperatures across the Arctic
A rise in global air temperatures is expected to increase permafrost thaw and alter ecosystem carbon and water cycles in Arctic regions. The coupling between the soil temperature in the active layer (soil between the ground surface and permafrost) and air temperature is a key component in understand...
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ftawi:oai:epic.awi.de:43325 2023-05-15T13:02:50+02:00 Impacts of Vegetation on the Decoupling between Air and Soil Temperatures across the Arctic Kropp, H. Loranty, M.M. Natali, S. Kholodov, A.L. Abbott, B.W. Abermann, J. Blanc-Betes, E. Blok, D. Blume-Werry, G. Boike, Julia Cahoon, C.M.P. Christiansen, C.T. Euskirchen, E.S. Frost, G.V. Goeckede, M. Gough, L. Hjorth, J. Hoje, T.T. Jones, B.M. Jorgenson, T. Juszak, I. Kokelj, S. Lund, M. Lafleur, P. Mamet, S. Mauritz, M. Michelsen, A. Myers-Smith, I.H. O'Donnell, J. Olefeldt, D. Phoenix, G.K. Rocha, A.V. Sannel, B. Schaepman-Strub, G. Sonnentag, O. Tape, K.D. Torn, M.S. Smith Vaughn, L. Sorensen, M. Williams, M. Wilson, C.J. 2016 https://epic.awi.de/id/eprint/43325/ https://hdl.handle.net/10013/epic.49795 unknown AGU Kropp, H. , Loranty, M. , Natali, S. , Kholodov, A. , Abbott, B. , Abermann, J. , Blanc-Betes, E. , Blok, D. , Blume-Werry, G. , Boike, J. orcid:0000-0002-5875-2112 , Cahoon, C. , Christiansen, C. , Euskirchen, E. , Frost, G. , Goeckede, M. , Gough, L. , Hjorth, J. , Hoje, T. , Jones, B. , Jorgenson, T. , Juszak, I. , Kokelj, S. , Lund, M. , Lafleur, P. , Mamet, S. , Mauritz, M. , Michelsen, A. , Myers-Smith, I. , O'Donnell, J. , Olefeldt, D. , Phoenix, G. , Rocha, A. , Sannel, B. , Schaepman-Strub, G. , Sonnentag, O. , Tape, K. , Torn, M. , Smith Vaughn, L. , Sorensen, M. , Williams, M. and Wilson, C. (2016) Impacts of Vegetation on the Decoupling between Air and Soil Temperatures across the Arctic , AGU Fall Meeting, San Francisco, 12 December 2016 - 16 December 2016 . hdl:10013/epic.49795 EPIC3AGU Fall Meeting, San Francisco, 2016-12-12-2016-12-16AGU Conference notRev 2016 ftawi 2021-12-24T15:42:27Z A rise in global air temperatures is expected to increase permafrost thaw and alter ecosystem carbon and water cycles in Arctic regions. The coupling between the soil temperature in the active layer (soil between the ground surface and permafrost) and air temperature is a key component in understanding permafrost stability and ecosystem change. Vegetation can affect soil temperature through a variety of mechanisms such as canopy shading, impacts on soil thermal conductivity via soil organic inputs or soil water uptake, albedo, and winter snow trapping. However, the relative importance of the vegetative effects on soil temperature is uncertain across large spatial scales and across different vegetative communities and ecosystem types. We compiled data on a Pan-Arctic scale pairing air and soil temperature with vegetation and ecosystem data to examine the impacts of vegetation on the decoupling of air and soil temperatures. We analyzed the summer thawing degree days, winter freezing degree days, and n factors (degree days soil/degree days air) from sites across the Arctic. Our results indicate that the decoupling between summer air and soil temperatures is more variable in boreal ecosystems than tundra ecosystems, and boreal ecosystems have lower winter n-factors than tundra ecosystems. Summer n-factors were more variable than winter n-factors, and had high variability within study sites. Vegetative and ecosystem characteristics can be key drivers of spatial and temporal variability in active layer soil temperature, particularly during the summer. Quantifying the impacts of vegetation on active layer temperature is critical to understanding how changes in vegetation under climate change can further affect permafrost stability and soil temperature. Conference Object Active layer temperature albedo Arctic Arctic Climate change permafrost Tundra Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
A rise in global air temperatures is expected to increase permafrost thaw and alter ecosystem carbon and water cycles in Arctic regions. The coupling between the soil temperature in the active layer (soil between the ground surface and permafrost) and air temperature is a key component in understanding permafrost stability and ecosystem change. Vegetation can affect soil temperature through a variety of mechanisms such as canopy shading, impacts on soil thermal conductivity via soil organic inputs or soil water uptake, albedo, and winter snow trapping. However, the relative importance of the vegetative effects on soil temperature is uncertain across large spatial scales and across different vegetative communities and ecosystem types. We compiled data on a Pan-Arctic scale pairing air and soil temperature with vegetation and ecosystem data to examine the impacts of vegetation on the decoupling of air and soil temperatures. We analyzed the summer thawing degree days, winter freezing degree days, and n factors (degree days soil/degree days air) from sites across the Arctic. Our results indicate that the decoupling between summer air and soil temperatures is more variable in boreal ecosystems than tundra ecosystems, and boreal ecosystems have lower winter n-factors than tundra ecosystems. Summer n-factors were more variable than winter n-factors, and had high variability within study sites. Vegetative and ecosystem characteristics can be key drivers of spatial and temporal variability in active layer soil temperature, particularly during the summer. Quantifying the impacts of vegetation on active layer temperature is critical to understanding how changes in vegetation under climate change can further affect permafrost stability and soil temperature. |
format |
Conference Object |
author |
Kropp, H. Loranty, M.M. Natali, S. Kholodov, A.L. Abbott, B.W. Abermann, J. Blanc-Betes, E. Blok, D. Blume-Werry, G. Boike, Julia Cahoon, C.M.P. Christiansen, C.T. Euskirchen, E.S. Frost, G.V. Goeckede, M. Gough, L. Hjorth, J. Hoje, T.T. Jones, B.M. Jorgenson, T. Juszak, I. Kokelj, S. Lund, M. Lafleur, P. Mamet, S. Mauritz, M. Michelsen, A. Myers-Smith, I.H. O'Donnell, J. Olefeldt, D. Phoenix, G.K. Rocha, A.V. Sannel, B. Schaepman-Strub, G. Sonnentag, O. Tape, K.D. Torn, M.S. Smith Vaughn, L. Sorensen, M. Williams, M. Wilson, C.J. |
spellingShingle |
Kropp, H. Loranty, M.M. Natali, S. Kholodov, A.L. Abbott, B.W. Abermann, J. Blanc-Betes, E. Blok, D. Blume-Werry, G. Boike, Julia Cahoon, C.M.P. Christiansen, C.T. Euskirchen, E.S. Frost, G.V. Goeckede, M. Gough, L. Hjorth, J. Hoje, T.T. Jones, B.M. Jorgenson, T. Juszak, I. Kokelj, S. Lund, M. Lafleur, P. Mamet, S. Mauritz, M. Michelsen, A. Myers-Smith, I.H. O'Donnell, J. Olefeldt, D. Phoenix, G.K. Rocha, A.V. Sannel, B. Schaepman-Strub, G. Sonnentag, O. Tape, K.D. Torn, M.S. Smith Vaughn, L. Sorensen, M. Williams, M. Wilson, C.J. Impacts of Vegetation on the Decoupling between Air and Soil Temperatures across the Arctic |
author_facet |
Kropp, H. Loranty, M.M. Natali, S. Kholodov, A.L. Abbott, B.W. Abermann, J. Blanc-Betes, E. Blok, D. Blume-Werry, G. Boike, Julia Cahoon, C.M.P. Christiansen, C.T. Euskirchen, E.S. Frost, G.V. Goeckede, M. Gough, L. Hjorth, J. Hoje, T.T. Jones, B.M. Jorgenson, T. Juszak, I. Kokelj, S. Lund, M. Lafleur, P. Mamet, S. Mauritz, M. Michelsen, A. Myers-Smith, I.H. O'Donnell, J. Olefeldt, D. Phoenix, G.K. Rocha, A.V. Sannel, B. Schaepman-Strub, G. Sonnentag, O. Tape, K.D. Torn, M.S. Smith Vaughn, L. Sorensen, M. Williams, M. Wilson, C.J. |
author_sort |
Kropp, H. |
title |
Impacts of Vegetation on the Decoupling between Air and Soil Temperatures across the Arctic |
title_short |
Impacts of Vegetation on the Decoupling between Air and Soil Temperatures across the Arctic |
title_full |
Impacts of Vegetation on the Decoupling between Air and Soil Temperatures across the Arctic |
title_fullStr |
Impacts of Vegetation on the Decoupling between Air and Soil Temperatures across the Arctic |
title_full_unstemmed |
Impacts of Vegetation on the Decoupling between Air and Soil Temperatures across the Arctic |
title_sort |
impacts of vegetation on the decoupling between air and soil temperatures across the arctic |
publisher |
AGU |
publishDate |
2016 |
url |
https://epic.awi.de/id/eprint/43325/ https://hdl.handle.net/10013/epic.49795 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Active layer temperature albedo Arctic Arctic Climate change permafrost Tundra |
genre_facet |
Active layer temperature albedo Arctic Arctic Climate change permafrost Tundra |
op_source |
EPIC3AGU Fall Meeting, San Francisco, 2016-12-12-2016-12-16AGU |
op_relation |
Kropp, H. , Loranty, M. , Natali, S. , Kholodov, A. , Abbott, B. , Abermann, J. , Blanc-Betes, E. , Blok, D. , Blume-Werry, G. , Boike, J. orcid:0000-0002-5875-2112 , Cahoon, C. , Christiansen, C. , Euskirchen, E. , Frost, G. , Goeckede, M. , Gough, L. , Hjorth, J. , Hoje, T. , Jones, B. , Jorgenson, T. , Juszak, I. , Kokelj, S. , Lund, M. , Lafleur, P. , Mamet, S. , Mauritz, M. , Michelsen, A. , Myers-Smith, I. , O'Donnell, J. , Olefeldt, D. , Phoenix, G. , Rocha, A. , Sannel, B. , Schaepman-Strub, G. , Sonnentag, O. , Tape, K. , Torn, M. , Smith Vaughn, L. , Sorensen, M. , Williams, M. and Wilson, C. (2016) Impacts of Vegetation on the Decoupling between Air and Soil Temperatures across the Arctic , AGU Fall Meeting, San Francisco, 12 December 2016 - 16 December 2016 . hdl:10013/epic.49795 |
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1766322274244231168 |