Carbon exchange over four growing seasons for a subarctic sedge fen in northern Manitoba, Canada
Net ecosystem exchange of carbon was measured using eddy covariance for four growing seasons at a subarctic hummocky fen in northern Manitoba, Canada. Over a 115 day measurement period each year, cumulative net ecosystem exchange of carbon ranged from a gain of 49 g C m−2 to a loss of 16 g C m−2 wit...
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Canadian Science Publishing
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Online Access: | https://doi.org/10.1139/as-2015-0003 https://doaj.org/article/db61745757d140f6bbda85194c7f8687 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:db61745757d140f6bbda85194c7f8687 2023-05-15T14:22:20+02:00 Carbon exchange over four growing seasons for a subarctic sedge fen in northern Manitoba, Canada Krista L. Hanis Brian D. Amiro Mario Tenuta Tim Papakyriakou Kyle A. Swystun 2015-12-01 https://doi.org/10.1139/as-2015-0003 https://doaj.org/article/db61745757d140f6bbda85194c7f8687 en fr eng fre Canadian Science Publishing doi:10.1139/as-2015-0003 2368-7460 https://doaj.org/article/db61745757d140f6bbda85194c7f8687 undefined Arctic Science, Vol 1, Iss 2, Pp 27-44 (2015) fen peat flux carbon eddy covariance methane hudson bay envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2015 fttriple https://doi.org/10.1139/as-2015-0003 2023-01-22T18:10:44Z Net ecosystem exchange of carbon was measured using eddy covariance for four growing seasons at a subarctic hummocky fen in northern Manitoba, Canada. Over a 115 day measurement period each year, cumulative net ecosystem exchange of carbon ranged from a gain of 49 g C m−2 to a loss of 16 g C m−2 with a mean loss of 6 g C m−2 from the fen, with an uncertainty of about ±34 g C m−2. Ecosystem respiration decreased with higher water tables (r2 = 0.3), especially in one summer when flooding occurred to 0.12 m above the peat surface. Additional methane emissions previously documented for the site of 4–5.7 g C m−2 year−1 added to the carbon loss. Carbon loss was measured from this same fen in the 1990s and it is likely that the carbon gain (peat accumulation) during past centuries has not continued in recent decades. Scaling to annual greenhouse gas emissions as a 100 year global warming potential showed that this fen is currently a source of 192–490 g CO2-equivalents m−2 year−1 based on both carbon dioxide and methane flux measurements, indicating that peat is decomposing. Article in Journal/Newspaper Arctic Hudson Bay Subarctic Unknown Canada Hudson Hudson Bay Arctic Science 1 2 27 44 |
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English French |
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fen peat flux carbon eddy covariance methane hudson bay envir geo |
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fen peat flux carbon eddy covariance methane hudson bay envir geo Krista L. Hanis Brian D. Amiro Mario Tenuta Tim Papakyriakou Kyle A. Swystun Carbon exchange over four growing seasons for a subarctic sedge fen in northern Manitoba, Canada |
topic_facet |
fen peat flux carbon eddy covariance methane hudson bay envir geo |
description |
Net ecosystem exchange of carbon was measured using eddy covariance for four growing seasons at a subarctic hummocky fen in northern Manitoba, Canada. Over a 115 day measurement period each year, cumulative net ecosystem exchange of carbon ranged from a gain of 49 g C m−2 to a loss of 16 g C m−2 with a mean loss of 6 g C m−2 from the fen, with an uncertainty of about ±34 g C m−2. Ecosystem respiration decreased with higher water tables (r2 = 0.3), especially in one summer when flooding occurred to 0.12 m above the peat surface. Additional methane emissions previously documented for the site of 4–5.7 g C m−2 year−1 added to the carbon loss. Carbon loss was measured from this same fen in the 1990s and it is likely that the carbon gain (peat accumulation) during past centuries has not continued in recent decades. Scaling to annual greenhouse gas emissions as a 100 year global warming potential showed that this fen is currently a source of 192–490 g CO2-equivalents m−2 year−1 based on both carbon dioxide and methane flux measurements, indicating that peat is decomposing. |
format |
Article in Journal/Newspaper |
author |
Krista L. Hanis Brian D. Amiro Mario Tenuta Tim Papakyriakou Kyle A. Swystun |
author_facet |
Krista L. Hanis Brian D. Amiro Mario Tenuta Tim Papakyriakou Kyle A. Swystun |
author_sort |
Krista L. Hanis |
title |
Carbon exchange over four growing seasons for a subarctic sedge fen in northern Manitoba, Canada |
title_short |
Carbon exchange over four growing seasons for a subarctic sedge fen in northern Manitoba, Canada |
title_full |
Carbon exchange over four growing seasons for a subarctic sedge fen in northern Manitoba, Canada |
title_fullStr |
Carbon exchange over four growing seasons for a subarctic sedge fen in northern Manitoba, Canada |
title_full_unstemmed |
Carbon exchange over four growing seasons for a subarctic sedge fen in northern Manitoba, Canada |
title_sort |
carbon exchange over four growing seasons for a subarctic sedge fen in northern manitoba, canada |
publisher |
Canadian Science Publishing |
publishDate |
2015 |
url |
https://doi.org/10.1139/as-2015-0003 https://doaj.org/article/db61745757d140f6bbda85194c7f8687 |
geographic |
Canada Hudson Hudson Bay |
geographic_facet |
Canada Hudson Hudson Bay |
genre |
Arctic Hudson Bay Subarctic |
genre_facet |
Arctic Hudson Bay Subarctic |
op_source |
Arctic Science, Vol 1, Iss 2, Pp 27-44 (2015) |
op_relation |
doi:10.1139/as-2015-0003 2368-7460 https://doaj.org/article/db61745757d140f6bbda85194c7f8687 |
op_rights |
undefined |
op_doi |
https://doi.org/10.1139/as-2015-0003 |
container_title |
Arctic Science |
container_volume |
1 |
container_issue |
2 |
container_start_page |
27 |
op_container_end_page |
44 |
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1766294961484988416 |