Increased nitrous oxide emissions from Arctic peatlands after permafrost thaw

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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.

I: Proceedings of the National Academy of Sciences of the United States of America, Vol. 114, Nr. 24, 13.06.2017, s. 6238-6243.

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Harvard

Voigt, C, Marushchak, ME, Lamprecht, RE, Jackowicz-Korczynski, M, Lindgren, A, Mastepanov, M, Granlund, L, Christensen, TR, Tahvanainen, T, Martikainen, PJ & Biasi, C 2017, 'Increased nitrous oxide emissions from Arctic peatlands after permafrost thaw', Proceedings of the National Academy of Sciences of the United States of America, vol. 114, nr. 24, s. 6238-6243. https://doi.org/10.1073/pnas.1702902114/

APA

CBE

Voigt C, Marushchak ME, Lamprecht RE, Jackowicz-Korczynski M, Lindgren A, Mastepanov M, Granlund L, Christensen TR, Tahvanainen T, Martikainen PJ, Biasi C. 2017. Increased nitrous oxide emissions from Arctic peatlands after permafrost thaw. Proceedings of the National Academy of Sciences of the United States of America. 114(24):6238-6243. https://doi.org/10.1073/pnas.1702902114/

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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. / Increased nitrous oxide emissions from Arctic peatlands after permafrost thaw. I: Proceedings of the National Academy of Sciences of the United States of America. 2017 ; Vol. 114, Nr. 24. s. 6238-6243.

RIS

TY - JOUR

T1 - Increased nitrous oxide emissions from Arctic peatlands after permafrost thaw

AU - Voigt, Carolina

AU - Marushchak, Maija E.

AU - Lamprecht, Richard E.

AU - Jackowicz-Korczynski, Marcin

AU - Lindgren, Amelie

AU - Mastepanov, Mikhail

AU - Granlund, Lars

AU - Christensen, Torben R.

AU - Tahvanainen, Teemu

AU - Martikainen, Pertti J.

AU - Biasi, Christina

PY - 2017/6/13

Y1 - 2017/6/13

N2 - 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 ∼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.

AB - 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 ∼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.

KW - Arctic soils

KW - Climate change

KW - Greenhouse gases

KW - Nitrogen

KW - Tundra

U2 - 10.1073/pnas.1702902114/

DO - 10.1073/pnas.1702902114/

M3 - Article

VL - 114

SP - 6238

EP - 6243

JO - Proceedings of the National Academy of Sciences

T2 - Proceedings of the National Academy of Sciences

JF - Proceedings of the National Academy of Sciences

SN - 1091-6490

IS - 24

ER -