Long-term drainage reduces CO 2 uptake and CH 4 emissions in a Siberian permafrost ecosystem
Permafrost landscapes in northern high latitudes with their massive organic carbon stocks are an important, poorly known, component of the global carbon cycle. However, in light of future Arctic warming, the sustainability of these carbon pools is uncertain. To a large part, this is due to a limited...
Published in: | Global Biogeochemical Cycles |
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ftpubman:oai:pure.mpg.de:item_2511642 2023-11-12T04:12:38+01:00 Long-term drainage reduces CO 2 uptake and CH 4 emissions in a Siberian permafrost ecosystem Kittler, F. Heimann, M. Kolle, O. Zimov, N. Zimov, S. Göckede, M. 2017-12 application/vnd.openxmlformats-officedocument.wordprocessingml.document application/pdf http://hdl.handle.net/11858/00-001M-0000-002E-89CB-0 http://hdl.handle.net/11858/00-001M-0000-002E-89CE-A http://hdl.handle.net/11858/00-001M-0000-002E-89CF-8 http://hdl.handle.net/21.11116/0000-0000-1448-9 unknown info:eu-repo/semantics/altIdentifier/doi/10.1002/2017GB005774 http://hdl.handle.net/11858/00-001M-0000-002E-89CB-0 http://hdl.handle.net/11858/00-001M-0000-002E-89CE-A http://hdl.handle.net/11858/00-001M-0000-002E-89CF-8 http://hdl.handle.net/21.11116/0000-0000-1448-9 Global Biogeochemical Cycles info:eu-repo/semantics/article 2017 ftpubman https://doi.org/10.1002/2017GB005774 2023-10-15T23:47:18Z Permafrost landscapes in northern high latitudes with their massive organic carbon stocks are an important, poorly known, component of the global carbon cycle. However, in light of future Arctic warming, the sustainability of these carbon pools is uncertain. To a large part, this is due to a limited understanding of the carbon cycle processes because of sparse observations in Arctic permafrost ecosystems. Here, we present an eddy covariance dataset covering more than three years of continuous CO2 and CH4 flux observations within a moist tussock tundra ecosystem near Chersky in North-eastern Siberia. Through parallel observations of a disturbed (drained) area and a control area nearby, we aim to evaluate the long-term effects of a persistently lowered water table on the net vertical carbon exchange budgets and the dominating biogeochemical mechanisms. Persistently drier soils trigger systematic shifts in the tundra ecosystem carbon cycle patterns. Both, uptake rates of CO2 and emissions of CH4 decreased. Year-round measurements emphasize the importance of the non-growing season – in particular the “zero-curtain” period in the fall – to the annual budget. Approximately 60% of the CO2 uptake in the growing-season is lost during the cold-seasons, while CH4 emissions during the non-growing season account for 30% of the annual budget. Year-to-year variability in temperature conditions during the late growing season were identified as the primary control of the interannual variability observed in the CO2 and CH4 fluxes. Article in Journal/Newspaper Arctic Chersky permafrost Tundra Siberia Max Planck Society: MPG.PuRe Arctic Global Biogeochemical Cycles 31 12 1704 1717 |
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Max Planck Society: MPG.PuRe |
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unknown |
description |
Permafrost landscapes in northern high latitudes with their massive organic carbon stocks are an important, poorly known, component of the global carbon cycle. However, in light of future Arctic warming, the sustainability of these carbon pools is uncertain. To a large part, this is due to a limited understanding of the carbon cycle processes because of sparse observations in Arctic permafrost ecosystems. Here, we present an eddy covariance dataset covering more than three years of continuous CO2 and CH4 flux observations within a moist tussock tundra ecosystem near Chersky in North-eastern Siberia. Through parallel observations of a disturbed (drained) area and a control area nearby, we aim to evaluate the long-term effects of a persistently lowered water table on the net vertical carbon exchange budgets and the dominating biogeochemical mechanisms. Persistently drier soils trigger systematic shifts in the tundra ecosystem carbon cycle patterns. Both, uptake rates of CO2 and emissions of CH4 decreased. Year-round measurements emphasize the importance of the non-growing season – in particular the “zero-curtain” period in the fall – to the annual budget. Approximately 60% of the CO2 uptake in the growing-season is lost during the cold-seasons, while CH4 emissions during the non-growing season account for 30% of the annual budget. Year-to-year variability in temperature conditions during the late growing season were identified as the primary control of the interannual variability observed in the CO2 and CH4 fluxes. |
format |
Article in Journal/Newspaper |
author |
Kittler, F. Heimann, M. Kolle, O. Zimov, N. Zimov, S. Göckede, M. |
spellingShingle |
Kittler, F. Heimann, M. Kolle, O. Zimov, N. Zimov, S. Göckede, M. Long-term drainage reduces CO 2 uptake and CH 4 emissions in a Siberian permafrost ecosystem |
author_facet |
Kittler, F. Heimann, M. Kolle, O. Zimov, N. Zimov, S. Göckede, M. |
author_sort |
Kittler, F. |
title |
Long-term drainage reduces CO 2 uptake and CH 4 emissions in a Siberian permafrost ecosystem |
title_short |
Long-term drainage reduces CO 2 uptake and CH 4 emissions in a Siberian permafrost ecosystem |
title_full |
Long-term drainage reduces CO 2 uptake and CH 4 emissions in a Siberian permafrost ecosystem |
title_fullStr |
Long-term drainage reduces CO 2 uptake and CH 4 emissions in a Siberian permafrost ecosystem |
title_full_unstemmed |
Long-term drainage reduces CO 2 uptake and CH 4 emissions in a Siberian permafrost ecosystem |
title_sort |
long-term drainage reduces co 2 uptake and ch 4 emissions in a siberian permafrost ecosystem |
publishDate |
2017 |
url |
http://hdl.handle.net/11858/00-001M-0000-002E-89CB-0 http://hdl.handle.net/11858/00-001M-0000-002E-89CE-A http://hdl.handle.net/11858/00-001M-0000-002E-89CF-8 http://hdl.handle.net/21.11116/0000-0000-1448-9 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Chersky permafrost Tundra Siberia |
genre_facet |
Arctic Chersky permafrost Tundra Siberia |
op_source |
Global Biogeochemical Cycles |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/2017GB005774 http://hdl.handle.net/11858/00-001M-0000-002E-89CB-0 http://hdl.handle.net/11858/00-001M-0000-002E-89CE-A http://hdl.handle.net/11858/00-001M-0000-002E-89CF-8 http://hdl.handle.net/21.11116/0000-0000-1448-9 |
op_doi |
https://doi.org/10.1002/2017GB005774 |
container_title |
Global Biogeochemical Cycles |
container_volume |
31 |
container_issue |
12 |
container_start_page |
1704 |
op_container_end_page |
1717 |
_version_ |
1782331055415492608 |