Increased nitrous oxide emissions from Arctic peatlands after permafrost thaw
Permafrost in the Arctic is thawing, exposing large carbon and nitrogen stocks for decomposition. Gaseous carbon release from Arctic soils due to permafrost thawing is known to be substantial, but growing evidence suggests that Arctic soils may also be relevant sources of nitrous oxide (N2O). Here w...
Published in: | Proceedings of the National Academy of Sciences |
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Online Access: | https://pure.au.dk/portal/en/publications/2728b622-11a0-4060-965b-84cd3e1c8e26 https://doi.org/10.1073/pnas.1702902114 |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/2728b622-11a0-4060-965b-84cd3e1c8e26 2024-02-11T09:59:36+01:00 Increased nitrous oxide emissions from Arctic peatlands after permafrost thaw Voigt, Carolina Marushchak, Maija E. Lamprecht, Richard E. Jackowicz-Korczynski, Marcin Lindgren, Amelie Mastepanov, Mikhail Granlund, Lars Christensen, Torben R. Tahvanainen, Teemu Martikainen, Pertti J Biasi, Christina 2017-06-13 https://pure.au.dk/portal/en/publications/2728b622-11a0-4060-965b-84cd3e1c8e26 https://doi.org/10.1073/pnas.1702902114 eng eng https://pure.au.dk/portal/en/publications/2728b622-11a0-4060-965b-84cd3e1c8e26 info:eu-repo/semantics/restrictedAccess Voigt , C , Marushchak , M E , Lamprecht , R E , Jackowicz-Korczynski , M , Lindgren , A , Mastepanov , M , Granlund , L , Christensen , T R , Tahvanainen , T , Martikainen , P J & Biasi , C 2017 , ' Increased nitrous oxide emissions from Arctic peatlands after permafrost thaw ' , Proceedings of the National Academy of Sciences , vol. 114 , no. 24 , pp. 6238-6243 . https://doi.org/10.1073/pnas.1702902114 AVAILABILITY Arctic soils CARBON STORAGE N2O EMISSIONS SOIL STOCKS THERMAL STATE TUNDRA climate change greenhouse gases nitrogen article 2017 ftuniaarhuspubl https://doi.org/10.1073/pnas.1702902114 2024-01-17T23:59:46Z Permafrost in the Arctic is thawing, exposing large carbon and nitrogen stocks for decomposition. Gaseous carbon release from Arctic soils due to permafrost thawing is known to be substantial, but growing evidence suggests that Arctic soils may also be relevant sources of nitrous oxide (N2O). Here we show that N2O emissions from subarctic peatlands increase as the permafrost thaws. In our study, the highest postthaw emissions occurred from bare peat surfaces, a typical landform in permafrost peatlands, where permafrost thaw caused a fivefold increase in emissions (0.56 +/- 0.11 vs. 2.81 +/- 0.6 mg N2O m(-2) d(-1)). These emission rates match those from tropical forest soils, the world's largest natural terrestrial N2O source. The presence of vegetation, known to limit N2O emissions in tundra, did decrease (by similar to 90%) but did not prevent thaw-induced N2O release, whereas waterlogged conditions suppressed the emissions. We show that regions with high probability for N2O emissions cover one-fourth of the Arctic. Our results imply that the Arctic N2O budget will depend strongly on moisture changes, and that a gradual deepening of the active layer will create a strong noncarbon climate change feedback. Article in Journal/Newspaper Arctic Arctic Climate change permafrost Subarctic Tundra Aarhus University: Research Arctic Proceedings of the National Academy of Sciences 114 24 6238 6243 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
AVAILABILITY Arctic soils CARBON STORAGE N2O EMISSIONS SOIL STOCKS THERMAL STATE TUNDRA climate change greenhouse gases nitrogen |
spellingShingle |
AVAILABILITY Arctic soils CARBON STORAGE N2O EMISSIONS SOIL STOCKS THERMAL STATE TUNDRA climate change greenhouse gases nitrogen Voigt, Carolina Marushchak, Maija E. Lamprecht, Richard E. Jackowicz-Korczynski, Marcin Lindgren, Amelie Mastepanov, Mikhail Granlund, Lars Christensen, Torben R. Tahvanainen, Teemu Martikainen, Pertti J Biasi, Christina Increased nitrous oxide emissions from Arctic peatlands after permafrost thaw |
topic_facet |
AVAILABILITY Arctic soils CARBON STORAGE N2O EMISSIONS SOIL STOCKS THERMAL STATE TUNDRA climate change greenhouse gases nitrogen |
description |
Permafrost in the Arctic is thawing, exposing large carbon and nitrogen stocks for decomposition. Gaseous carbon release from Arctic soils due to permafrost thawing is known to be substantial, but growing evidence suggests that Arctic soils may also be relevant sources of nitrous oxide (N2O). Here we show that N2O emissions from subarctic peatlands increase as the permafrost thaws. In our study, the highest postthaw emissions occurred from bare peat surfaces, a typical landform in permafrost peatlands, where permafrost thaw caused a fivefold increase in emissions (0.56 +/- 0.11 vs. 2.81 +/- 0.6 mg N2O m(-2) d(-1)). These emission rates match those from tropical forest soils, the world's largest natural terrestrial N2O source. The presence of vegetation, known to limit N2O emissions in tundra, did decrease (by similar to 90%) but did not prevent thaw-induced N2O release, whereas waterlogged conditions suppressed the emissions. We show that regions with high probability for N2O emissions cover one-fourth of the Arctic. Our results imply that the Arctic N2O budget will depend strongly on moisture changes, and that a gradual deepening of the active layer will create a strong noncarbon climate change feedback. |
format |
Article in Journal/Newspaper |
author |
Voigt, Carolina Marushchak, Maija E. Lamprecht, Richard E. Jackowicz-Korczynski, Marcin Lindgren, Amelie Mastepanov, Mikhail Granlund, Lars Christensen, Torben R. Tahvanainen, Teemu Martikainen, Pertti J Biasi, Christina |
author_facet |
Voigt, Carolina Marushchak, Maija E. Lamprecht, Richard E. Jackowicz-Korczynski, Marcin Lindgren, Amelie Mastepanov, Mikhail Granlund, Lars Christensen, Torben R. Tahvanainen, Teemu Martikainen, Pertti J Biasi, Christina |
author_sort |
Voigt, Carolina |
title |
Increased nitrous oxide emissions from Arctic peatlands after permafrost thaw |
title_short |
Increased nitrous oxide emissions from Arctic peatlands after permafrost thaw |
title_full |
Increased nitrous oxide emissions from Arctic peatlands after permafrost thaw |
title_fullStr |
Increased nitrous oxide emissions from Arctic peatlands after permafrost thaw |
title_full_unstemmed |
Increased nitrous oxide emissions from Arctic peatlands after permafrost thaw |
title_sort |
increased nitrous oxide emissions from arctic peatlands after permafrost thaw |
publishDate |
2017 |
url |
https://pure.au.dk/portal/en/publications/2728b622-11a0-4060-965b-84cd3e1c8e26 https://doi.org/10.1073/pnas.1702902114 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Climate change permafrost Subarctic Tundra |
genre_facet |
Arctic Arctic Climate change permafrost Subarctic Tundra |
op_source |
Voigt , C , Marushchak , M E , Lamprecht , R E , Jackowicz-Korczynski , M , Lindgren , A , Mastepanov , M , Granlund , L , Christensen , T R , Tahvanainen , T , Martikainen , P J & Biasi , C 2017 , ' Increased nitrous oxide emissions from Arctic peatlands after permafrost thaw ' , Proceedings of the National Academy of Sciences , vol. 114 , no. 24 , pp. 6238-6243 . https://doi.org/10.1073/pnas.1702902114 |
op_relation |
https://pure.au.dk/portal/en/publications/2728b622-11a0-4060-965b-84cd3e1c8e26 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1073/pnas.1702902114 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
114 |
container_issue |
24 |
container_start_page |
6238 |
op_container_end_page |
6243 |
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1790595425893351424 |