Shifted energy fluxes, increased Bowen ratios, and reduced thaw depths linked with drainage-induced changes in permafrost ecosystem structure
Hydrologic conditions are a key factor in Arctic ecosystems, with strong influences on ecosystem structure and related effects on biogeophysical and biogeochemical processes. With systematic changes in water availability expected for large parts of the northern high-latitude region in the coming cen...
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Online Access: | http://hdl.handle.net/10138/230851 |
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/230851 2024-01-07T09:41:32+01:00 Shifted energy fluxes, increased Bowen ratios, and reduced thaw depths linked with drainage-induced changes in permafrost ecosystem structure Göckede, Mathias Kittler, Fanny Kwon, Min Jung Burjack, Ina Heimann, Martin Kolle, Olaf Zimov, Nikita Zimov, Sergey Department of Physics INAR Physics 2018-01-09T10:52:01Z 22 application/pdf http://hdl.handle.net/10138/230851 eng eng COPERNICUS GESELLSCHAFT MBH 10.5194/tc-11-2975-2017 This work was supported through funding by the European Commission (PAGE21 project, FP7-ENV-2011, grant agreement no. 282700, and PerCCOM project, FP7-PEOPLE-2012-CIG, grant agreement no. PCIG12-GA-201-333796), the German Ministry of Education and Research (CarboPerm-Project, BMBF grant no. 03G0836G), and the AXA Research Fund (PDOC_2012_W2 campaign, ARF fellowship Mathias Gockede). The authors appreciate the contribution of staff members of the Northeast Scientific Station in Chersky for facilitating the field experiments, especially Galina Zimova and Nastya Zimova. We would also like to thank the administration and service departments within the Max Planck Institute for Biogeochemistry, most notably the Field Experiments & Instrumentation group, for their contributions to planning and logistics, and for supporting field work activities. Göckede , M , Kittler , F , Kwon , M J , Burjack , I , Heimann , M , Kolle , O , Zimov , N & Zimov , S 2017 , ' Shifted energy fluxes, increased Bowen ratios, and reduced thaw depths linked with drainage-induced changes in permafrost ecosystem structure ' , Cryosphere , vol. 11 , no. 6 . https://doi.org/10.5194/tc-11-2975-2017 ORCID: /0000-0001-6296-5113/work/40380761 85038635204 99725f08-9e0a-46bb-b1ec-d1ed023ea4e2 http://hdl.handle.net/10138/230851 000418077800001 cc_by openAccess info:eu-repo/semantics/openAccess SNOW-SHRUB INTERACTIONS HIGH-LATITUDE WETLANDS POLYGONAL TUNDRA SITE CLIMATE-CHANGE ARCTIC TUNDRA SOIL TEMPERATURES CARBON DYNAMICS NORTHERN SIBERIA TUSSOCK TUNDRA WATER-BALANCE 114 Physical sciences Article publishedVersion 2018 ftunivhelsihelda 2023-12-14T00:05:50Z Hydrologic conditions are a key factor in Arctic ecosystems, with strong influences on ecosystem structure and related effects on biogeophysical and biogeochemical processes. With systematic changes in water availability expected for large parts of the northern high-latitude region in the coming centuries, knowledge on shifts in ecosystem functionality triggered by altered water levels is crucial for reducing uncertainties in climate change predictions. Here, we present findings from paired ecosystem observations in northeast Siberia comprising a drained and a control site. At the drainage site, the water table has been artificially lowered by up to 30 cm in summer for more than a decade. This sustained primary disturbance in hydrologic conditions has triggered a suite of secondary shifts in ecosystem properties, including vegetation community structure, snow cover dynamics, and radiation budget, all of which influence the net effects of drainage. Reduced thermal conductivity in dry organic soils was identified as the dominating drainage effect on energy budget and soil thermal regime. Through this effect, reduced heat transfer into deeper soil layers leads to shallower thaw depths, initially leading to a stabilization of organic permafrost soils, while the long-term effects on permafrost temperature trends still need to be assessed. At the same time, more energy is transferred back into the atmosphere as sensible heat in the drained area, which may trigger a warming of the lower atmospheric surface layer. Peer reviewed Article in Journal/Newspaper Arctic Climate change permafrost Tundra Siberia HELDA – University of Helsinki Open Repository Arctic The Cryosphere 11 6 2975 2996 |
institution |
Open Polar |
collection |
HELDA – University of Helsinki Open Repository |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
SNOW-SHRUB INTERACTIONS HIGH-LATITUDE WETLANDS POLYGONAL TUNDRA SITE CLIMATE-CHANGE ARCTIC TUNDRA SOIL TEMPERATURES CARBON DYNAMICS NORTHERN SIBERIA TUSSOCK TUNDRA WATER-BALANCE 114 Physical sciences |
spellingShingle |
SNOW-SHRUB INTERACTIONS HIGH-LATITUDE WETLANDS POLYGONAL TUNDRA SITE CLIMATE-CHANGE ARCTIC TUNDRA SOIL TEMPERATURES CARBON DYNAMICS NORTHERN SIBERIA TUSSOCK TUNDRA WATER-BALANCE 114 Physical sciences Göckede, Mathias Kittler, Fanny Kwon, Min Jung Burjack, Ina Heimann, Martin Kolle, Olaf Zimov, Nikita Zimov, Sergey Shifted energy fluxes, increased Bowen ratios, and reduced thaw depths linked with drainage-induced changes in permafrost ecosystem structure |
topic_facet |
SNOW-SHRUB INTERACTIONS HIGH-LATITUDE WETLANDS POLYGONAL TUNDRA SITE CLIMATE-CHANGE ARCTIC TUNDRA SOIL TEMPERATURES CARBON DYNAMICS NORTHERN SIBERIA TUSSOCK TUNDRA WATER-BALANCE 114 Physical sciences |
description |
Hydrologic conditions are a key factor in Arctic ecosystems, with strong influences on ecosystem structure and related effects on biogeophysical and biogeochemical processes. With systematic changes in water availability expected for large parts of the northern high-latitude region in the coming centuries, knowledge on shifts in ecosystem functionality triggered by altered water levels is crucial for reducing uncertainties in climate change predictions. Here, we present findings from paired ecosystem observations in northeast Siberia comprising a drained and a control site. At the drainage site, the water table has been artificially lowered by up to 30 cm in summer for more than a decade. This sustained primary disturbance in hydrologic conditions has triggered a suite of secondary shifts in ecosystem properties, including vegetation community structure, snow cover dynamics, and radiation budget, all of which influence the net effects of drainage. Reduced thermal conductivity in dry organic soils was identified as the dominating drainage effect on energy budget and soil thermal regime. Through this effect, reduced heat transfer into deeper soil layers leads to shallower thaw depths, initially leading to a stabilization of organic permafrost soils, while the long-term effects on permafrost temperature trends still need to be assessed. At the same time, more energy is transferred back into the atmosphere as sensible heat in the drained area, which may trigger a warming of the lower atmospheric surface layer. Peer reviewed |
author2 |
Department of Physics INAR Physics |
format |
Article in Journal/Newspaper |
author |
Göckede, Mathias Kittler, Fanny Kwon, Min Jung Burjack, Ina Heimann, Martin Kolle, Olaf Zimov, Nikita Zimov, Sergey |
author_facet |
Göckede, Mathias Kittler, Fanny Kwon, Min Jung Burjack, Ina Heimann, Martin Kolle, Olaf Zimov, Nikita Zimov, Sergey |
author_sort |
Göckede, Mathias |
title |
Shifted energy fluxes, increased Bowen ratios, and reduced thaw depths linked with drainage-induced changes in permafrost ecosystem structure |
title_short |
Shifted energy fluxes, increased Bowen ratios, and reduced thaw depths linked with drainage-induced changes in permafrost ecosystem structure |
title_full |
Shifted energy fluxes, increased Bowen ratios, and reduced thaw depths linked with drainage-induced changes in permafrost ecosystem structure |
title_fullStr |
Shifted energy fluxes, increased Bowen ratios, and reduced thaw depths linked with drainage-induced changes in permafrost ecosystem structure |
title_full_unstemmed |
Shifted energy fluxes, increased Bowen ratios, and reduced thaw depths linked with drainage-induced changes in permafrost ecosystem structure |
title_sort |
shifted energy fluxes, increased bowen ratios, and reduced thaw depths linked with drainage-induced changes in permafrost ecosystem structure |
publisher |
COPERNICUS GESELLSCHAFT MBH |
publishDate |
2018 |
url |
http://hdl.handle.net/10138/230851 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change permafrost Tundra Siberia |
genre_facet |
Arctic Climate change permafrost Tundra Siberia |
op_relation |
10.5194/tc-11-2975-2017 This work was supported through funding by the European Commission (PAGE21 project, FP7-ENV-2011, grant agreement no. 282700, and PerCCOM project, FP7-PEOPLE-2012-CIG, grant agreement no. PCIG12-GA-201-333796), the German Ministry of Education and Research (CarboPerm-Project, BMBF grant no. 03G0836G), and the AXA Research Fund (PDOC_2012_W2 campaign, ARF fellowship Mathias Gockede). The authors appreciate the contribution of staff members of the Northeast Scientific Station in Chersky for facilitating the field experiments, especially Galina Zimova and Nastya Zimova. We would also like to thank the administration and service departments within the Max Planck Institute for Biogeochemistry, most notably the Field Experiments & Instrumentation group, for their contributions to planning and logistics, and for supporting field work activities. Göckede , M , Kittler , F , Kwon , M J , Burjack , I , Heimann , M , Kolle , O , Zimov , N & Zimov , S 2017 , ' Shifted energy fluxes, increased Bowen ratios, and reduced thaw depths linked with drainage-induced changes in permafrost ecosystem structure ' , Cryosphere , vol. 11 , no. 6 . https://doi.org/10.5194/tc-11-2975-2017 ORCID: /0000-0001-6296-5113/work/40380761 85038635204 99725f08-9e0a-46bb-b1ec-d1ed023ea4e2 http://hdl.handle.net/10138/230851 000418077800001 |
op_rights |
cc_by openAccess info:eu-repo/semantics/openAccess |
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The Cryosphere |
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11 |
container_issue |
6 |
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2975 |
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2996 |
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