Ecosystem carbon response of an Arctic peatland to simulated permafrost thaw
Permafrost peatlands are biogeochemical hot spots in the Arctic as they store vast amounts of carbon. Permafrost thaw could release part of these long‐term immobile carbon stocks as the greenhouse gases (GHGs) carbon dioxide (CO2) and methane (CH4) to the atmosphere, but how much, at which time‐span...
Published in: | Global Change Biology |
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Online Access: | http://urn.fi/URN:NBN:fi:jyu-201904162198 |
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ftjyvaeskylaenun:oai:jyx.jyu.fi:123456789/63578 2024-02-04T09:56:46+01:00 Ecosystem carbon response of an Arctic peatland to simulated permafrost thaw Voigt, Carolina Marushchak, Maija Mastepanov, Mikhail Lamprecht, Richard E. Christensen, Torben R. Dorodnikov, Maxim Jackowicz‐Korczyński, Marcin Lindgren, Amelie Lohila, Annalea Nykänen, Hannu Oinonen, Markku Oksanen, Timo Palonen, Vesa Treat, Claire C. Martikainen, Pertti J. Biasi, Christina 2019 application/pdf 1746-1764 fulltext http://urn.fi/URN:NBN:fi:jyu-201904162198 eng eng Wiley-Blackwell Publishing Ltd. Global Change Biology 1354-1013 5 25 10.1111/gcb.14574 Voigt, C., Marushchak, M., Mastepanov, M., Lamprecht, R. E., Christensen, T. R., Dorodnikov, M., Jackowicz‐Korczyński, M., Lindgren, A., Lohila, A., Nykänen, H., Oinonen, M., Oksanen, T., Palonen, V., Treat, C. C., Martikainen, P. J., & Biasi, C. (2019). Ecosystem carbon response of an Arctic peatland to simulated permafrost thaw. Global Change Biology , 25 (5), 1746-1764. https://doi.org/10.1111/gcb.14574 CONVID_28890098 TUTKAID_80477 URN:NBN:fi:jyu-201904162198 http://urn.fi/URN:NBN:fi:jyu-201904162198 In Copyright © 2019 John Wiley & Sons Ltd. openAccess http://rightsstatements.org/page/InC/1.0/?language=en greenhouse gas climate warming permafrost-carbon-feedback CO2 methane oxidation mesocosm kasvihuonekaasut metaani hiilidioksidi kasvihuoneilmiö hiilen kierto ikirouta article http://purl.org/eprint/type/JournalArticle http://purl.org/coar/resource_type/c_2df8fbb1 acceptedVersion A1 2019 ftjyvaeskylaenun 2024-01-11T00:03:55Z Permafrost peatlands are biogeochemical hot spots in the Arctic as they store vast amounts of carbon. Permafrost thaw could release part of these long‐term immobile carbon stocks as the greenhouse gases (GHGs) carbon dioxide (CO2) and methane (CH4) to the atmosphere, but how much, at which time‐span and as which gaseous carbon species is still highly uncertain. Here we assess the effect of permafrost thaw on GHG dynamics under different moisture and vegetation scenarios in a permafrost peatland. A novel experimental approach using intact plant–soil systems (mesocosms) allowed us to simulate permafrost thaw under near‐natural conditions. We monitored GHG flux dynamics via high‐resolution flow‐through gas measurements, combined with detailed monitoring of soil GHG concentration dynamics, yielding insights into GHG production and consumption potential of individual soil layers. Thawing the upper 10–15 cm of permafrost under dry conditions increased CO2 emissions to the atmosphere (without vegetation: 0.74 ± 0.49 vs. 0.84 ± 0.60 g CO2–C m−2 day−1; with vegetation: 1.20 ± 0.50 vs. 1.32 ± 0.60 g CO2–C m−2 day−1, mean ± SD, pre‐ and post‐thaw, respectively). Radiocarbon dating (14C) of respired CO2, supported by an independent curve‐fitting approach, showed a clear contribution (9%–27%) of old carbon to this enhanced post‐thaw CO2 flux. Elevated concentrations of CO2, CH4, and dissolved organic carbon at depth indicated not just pulse emissions during the thawing process, but sustained decomposition and GHG production from thawed permafrost. Oxidation of CH4 in the peat column, however, prevented CH4 release to the atmosphere. Importantly, we show here that, under dry conditions, peatlands strengthen the permafrost–carbon feedback by adding to the atmospheric CO2 burden post‐thaw. However, as long as the water table remains low, our results reveal a strong CH4 sink capacity in these types of Arctic ecosystems pre‐ and post‐thaw, with the potential to compensate part of the permafrost CO2 losses over longer timescales. ... Article in Journal/Newspaper Arctic Arctic permafrost JYX - Jyväskylä University Digital Archive Arctic Global Change Biology 25 5 1746 1764 |
institution |
Open Polar |
collection |
JYX - Jyväskylä University Digital Archive |
op_collection_id |
ftjyvaeskylaenun |
language |
English |
topic |
greenhouse gas climate warming permafrost-carbon-feedback CO2 methane oxidation mesocosm kasvihuonekaasut metaani hiilidioksidi kasvihuoneilmiö hiilen kierto ikirouta |
spellingShingle |
greenhouse gas climate warming permafrost-carbon-feedback CO2 methane oxidation mesocosm kasvihuonekaasut metaani hiilidioksidi kasvihuoneilmiö hiilen kierto ikirouta Voigt, Carolina Marushchak, Maija Mastepanov, Mikhail Lamprecht, Richard E. Christensen, Torben R. Dorodnikov, Maxim Jackowicz‐Korczyński, Marcin Lindgren, Amelie Lohila, Annalea Nykänen, Hannu Oinonen, Markku Oksanen, Timo Palonen, Vesa Treat, Claire C. Martikainen, Pertti J. Biasi, Christina Ecosystem carbon response of an Arctic peatland to simulated permafrost thaw |
topic_facet |
greenhouse gas climate warming permafrost-carbon-feedback CO2 methane oxidation mesocosm kasvihuonekaasut metaani hiilidioksidi kasvihuoneilmiö hiilen kierto ikirouta |
description |
Permafrost peatlands are biogeochemical hot spots in the Arctic as they store vast amounts of carbon. Permafrost thaw could release part of these long‐term immobile carbon stocks as the greenhouse gases (GHGs) carbon dioxide (CO2) and methane (CH4) to the atmosphere, but how much, at which time‐span and as which gaseous carbon species is still highly uncertain. Here we assess the effect of permafrost thaw on GHG dynamics under different moisture and vegetation scenarios in a permafrost peatland. A novel experimental approach using intact plant–soil systems (mesocosms) allowed us to simulate permafrost thaw under near‐natural conditions. We monitored GHG flux dynamics via high‐resolution flow‐through gas measurements, combined with detailed monitoring of soil GHG concentration dynamics, yielding insights into GHG production and consumption potential of individual soil layers. Thawing the upper 10–15 cm of permafrost under dry conditions increased CO2 emissions to the atmosphere (without vegetation: 0.74 ± 0.49 vs. 0.84 ± 0.60 g CO2–C m−2 day−1; with vegetation: 1.20 ± 0.50 vs. 1.32 ± 0.60 g CO2–C m−2 day−1, mean ± SD, pre‐ and post‐thaw, respectively). Radiocarbon dating (14C) of respired CO2, supported by an independent curve‐fitting approach, showed a clear contribution (9%–27%) of old carbon to this enhanced post‐thaw CO2 flux. Elevated concentrations of CO2, CH4, and dissolved organic carbon at depth indicated not just pulse emissions during the thawing process, but sustained decomposition and GHG production from thawed permafrost. Oxidation of CH4 in the peat column, however, prevented CH4 release to the atmosphere. Importantly, we show here that, under dry conditions, peatlands strengthen the permafrost–carbon feedback by adding to the atmospheric CO2 burden post‐thaw. However, as long as the water table remains low, our results reveal a strong CH4 sink capacity in these types of Arctic ecosystems pre‐ and post‐thaw, with the potential to compensate part of the permafrost CO2 losses over longer timescales. ... |
format |
Article in Journal/Newspaper |
author |
Voigt, Carolina Marushchak, Maija Mastepanov, Mikhail Lamprecht, Richard E. Christensen, Torben R. Dorodnikov, Maxim Jackowicz‐Korczyński, Marcin Lindgren, Amelie Lohila, Annalea Nykänen, Hannu Oinonen, Markku Oksanen, Timo Palonen, Vesa Treat, Claire C. Martikainen, Pertti J. Biasi, Christina |
author_facet |
Voigt, Carolina Marushchak, Maija Mastepanov, Mikhail Lamprecht, Richard E. Christensen, Torben R. Dorodnikov, Maxim Jackowicz‐Korczyński, Marcin Lindgren, Amelie Lohila, Annalea Nykänen, Hannu Oinonen, Markku Oksanen, Timo Palonen, Vesa Treat, Claire C. Martikainen, Pertti J. Biasi, Christina |
author_sort |
Voigt, Carolina |
title |
Ecosystem carbon response of an Arctic peatland to simulated permafrost thaw |
title_short |
Ecosystem carbon response of an Arctic peatland to simulated permafrost thaw |
title_full |
Ecosystem carbon response of an Arctic peatland to simulated permafrost thaw |
title_fullStr |
Ecosystem carbon response of an Arctic peatland to simulated permafrost thaw |
title_full_unstemmed |
Ecosystem carbon response of an Arctic peatland to simulated permafrost thaw |
title_sort |
ecosystem carbon response of an arctic peatland to simulated permafrost thaw |
publisher |
Wiley-Blackwell Publishing Ltd. |
publishDate |
2019 |
url |
http://urn.fi/URN:NBN:fi:jyu-201904162198 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic permafrost |
genre_facet |
Arctic Arctic permafrost |
op_relation |
Global Change Biology 1354-1013 5 25 10.1111/gcb.14574 Voigt, C., Marushchak, M., Mastepanov, M., Lamprecht, R. E., Christensen, T. R., Dorodnikov, M., Jackowicz‐Korczyński, M., Lindgren, A., Lohila, A., Nykänen, H., Oinonen, M., Oksanen, T., Palonen, V., Treat, C. C., Martikainen, P. J., & Biasi, C. (2019). Ecosystem carbon response of an Arctic peatland to simulated permafrost thaw. Global Change Biology , 25 (5), 1746-1764. https://doi.org/10.1111/gcb.14574 CONVID_28890098 TUTKAID_80477 URN:NBN:fi:jyu-201904162198 http://urn.fi/URN:NBN:fi:jyu-201904162198 |
op_rights |
In Copyright © 2019 John Wiley & Sons Ltd. openAccess http://rightsstatements.org/page/InC/1.0/?language=en |
container_title |
Global Change Biology |
container_volume |
25 |
container_issue |
5 |
container_start_page |
1746 |
op_container_end_page |
1764 |
_version_ |
1789961141276901376 |