Volatile emissions from thawing permafrost soils are influenced by meltwater drainage conditions
Abstract Vast amounts of carbon are bound in both active layer and permafrost soils in the Arctic. As a consequence of climate warming, the depth of the active layer is increasing in size and permafrost soils are thawing. We hypothesize that pulses of biogenic volatile organic compounds are released...
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crwiley:10.1111/gcb.14582 2024-09-15T18:29:28+00:00 Volatile emissions from thawing permafrost soils are influenced by meltwater drainage conditions Kramshøj, Magnus Albers, Christian N. Svendsen, Sarah H. Björkman, Mats P. Lindwall, Frida Björk, Robert G. Rinnan, Riikka Villum Fonden H2020 European Research Council Svenska Forskningsrådet Formas Carlsbergfondet Danmarks Grundforskningsfond Natur og Univers, Det Frie Forskningsråd 2019 http://dx.doi.org/10.1111/gcb.14582 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fgcb.14582 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.14582 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gcb.14582 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Global Change Biology volume 25, issue 5, page 1704-1716 ISSN 1354-1013 1365-2486 journal-article 2019 crwiley https://doi.org/10.1111/gcb.14582 2024-08-22T04:16:00Z Abstract Vast amounts of carbon are bound in both active layer and permafrost soils in the Arctic. As a consequence of climate warming, the depth of the active layer is increasing in size and permafrost soils are thawing. We hypothesize that pulses of biogenic volatile organic compounds are released from the near‐surface active layer during spring, and during late summer season from thawing permafrost, while the subsequent biogeochemical processes occurring in thawed soils also lead to emissions. Biogenic volatile organic compounds are reactive gases that have both negative and positive climate forcing impacts when introduced to the Arctic atmosphere, and the knowledge of their emission magnitude and pattern is necessary to construct reliable climate models. However, it is unclear how different ecosystems and environmental factors such as drainage conditions upon permafrost thaw affect the emission and compound composition. Here we show that incubations of frozen B horizon of the active layer and permafrost soils collected from a High Arctic heath and fen release a range of biogenic volatile organic compounds upon thaw and during subsequent incubation experiments at temperatures of 10°C and 20°C. Meltwater drainage in the fen soils increased emission rates nine times, while having no effect in the drier heath soils. Emissions generally increased with temperature, and emission profiles for the fen soils were dominated by benzenoids and alkanes, while benzenoids, ketones, and alcohols dominated in heath soils. Our results emphasize that future changes affecting the drainage conditions of the Arctic tundra will have a large influence on volatile emissions from thawing permafrost soils – particularly in wetland/fen areas. Article in Journal/Newspaper permafrost Tundra Wiley Online Library Global Change Biology 25 5 1704 1716 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Vast amounts of carbon are bound in both active layer and permafrost soils in the Arctic. As a consequence of climate warming, the depth of the active layer is increasing in size and permafrost soils are thawing. We hypothesize that pulses of biogenic volatile organic compounds are released from the near‐surface active layer during spring, and during late summer season from thawing permafrost, while the subsequent biogeochemical processes occurring in thawed soils also lead to emissions. Biogenic volatile organic compounds are reactive gases that have both negative and positive climate forcing impacts when introduced to the Arctic atmosphere, and the knowledge of their emission magnitude and pattern is necessary to construct reliable climate models. However, it is unclear how different ecosystems and environmental factors such as drainage conditions upon permafrost thaw affect the emission and compound composition. Here we show that incubations of frozen B horizon of the active layer and permafrost soils collected from a High Arctic heath and fen release a range of biogenic volatile organic compounds upon thaw and during subsequent incubation experiments at temperatures of 10°C and 20°C. Meltwater drainage in the fen soils increased emission rates nine times, while having no effect in the drier heath soils. Emissions generally increased with temperature, and emission profiles for the fen soils were dominated by benzenoids and alkanes, while benzenoids, ketones, and alcohols dominated in heath soils. Our results emphasize that future changes affecting the drainage conditions of the Arctic tundra will have a large influence on volatile emissions from thawing permafrost soils – particularly in wetland/fen areas. |
author2 |
Villum Fonden H2020 European Research Council Svenska Forskningsrådet Formas Carlsbergfondet Danmarks Grundforskningsfond Natur og Univers, Det Frie Forskningsråd |
format |
Article in Journal/Newspaper |
author |
Kramshøj, Magnus Albers, Christian N. Svendsen, Sarah H. Björkman, Mats P. Lindwall, Frida Björk, Robert G. Rinnan, Riikka |
spellingShingle |
Kramshøj, Magnus Albers, Christian N. Svendsen, Sarah H. Björkman, Mats P. Lindwall, Frida Björk, Robert G. Rinnan, Riikka Volatile emissions from thawing permafrost soils are influenced by meltwater drainage conditions |
author_facet |
Kramshøj, Magnus Albers, Christian N. Svendsen, Sarah H. Björkman, Mats P. Lindwall, Frida Björk, Robert G. Rinnan, Riikka |
author_sort |
Kramshøj, Magnus |
title |
Volatile emissions from thawing permafrost soils are influenced by meltwater drainage conditions |
title_short |
Volatile emissions from thawing permafrost soils are influenced by meltwater drainage conditions |
title_full |
Volatile emissions from thawing permafrost soils are influenced by meltwater drainage conditions |
title_fullStr |
Volatile emissions from thawing permafrost soils are influenced by meltwater drainage conditions |
title_full_unstemmed |
Volatile emissions from thawing permafrost soils are influenced by meltwater drainage conditions |
title_sort |
volatile emissions from thawing permafrost soils are influenced by meltwater drainage conditions |
publisher |
Wiley |
publishDate |
2019 |
url |
http://dx.doi.org/10.1111/gcb.14582 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fgcb.14582 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.14582 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gcb.14582 |
genre |
permafrost Tundra |
genre_facet |
permafrost Tundra |
op_source |
Global Change Biology volume 25, issue 5, page 1704-1716 ISSN 1354-1013 1365-2486 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/gcb.14582 |
container_title |
Global Change Biology |
container_volume |
25 |
container_issue |
5 |
container_start_page |
1704 |
op_container_end_page |
1716 |
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1810470866300960768 |