Controls on carbon dioxide and methane fluxes from a low-center polygonal peatland in the Mackenzie River Delta, Northwest Territories
Growing season surface–atmosphere exchange of carbon dioxide and methane were quantified at Fish Island, a wetland site in the lower northeast Mackenzie River Delta, Northwest Territories, Canada. The terrain consists of low-center polygonal tundra and is subject to infrequent flooding in high water...
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Canadian Science Publishing
2022
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ftdoajarticles:oai:doaj.org/article:6fd19ca9b39c4ebd9cc8704715068a0d 2023-05-15T14:23:50+02:00 Controls on carbon dioxide and methane fluxes from a low-center polygonal peatland in the Mackenzie River Delta, Northwest Territories June Skeeter Andreas Christen Greg H.R. Henry 2022-06-01T00:00:00Z https://doi.org/10.1139/as-2021-0034 https://doaj.org/article/6fd19ca9b39c4ebd9cc8704715068a0d EN FR eng fre Canadian Science Publishing https://cdnsciencepub.com/doi/10.1139/as-2021-0034 https://doaj.org/toc/2368-7460 doi:10.1139/as-2021-0034 2368-7460 https://doaj.org/article/6fd19ca9b39c4ebd9cc8704715068a0d Arctic Science, Vol 8, Iss 2, Pp 471-497 (2022) carbon dioxide methane river delta permafrost peatland dioxyde de carbone Environmental sciences GE1-350 Environmental engineering TA170-171 article 2022 ftdoajarticles https://doi.org/10.1139/as-2021-0034 2022-12-31T02:45:35Z Growing season surface–atmosphere exchange of carbon dioxide and methane were quantified at Fish Island, a wetland site in the lower northeast Mackenzie River Delta, Northwest Territories, Canada. The terrain consists of low-center polygonal tundra and is subject to infrequent flooding in high water years. Carbon dioxide and methane fluxes were continuously measured using eddy covariance and the relevance of different environmental controls were identified using neural networks. Net daily carbon dioxide uptake peaked in mid-July before gradually decreasing and transitioning to net daily emissions by September. Variations in light level and temperature were the main controls over diurnal net carbon dioxide uptake, whereas thaw depth and phenology were the main seasonal controls. Methane emissions measured at Fish Island were higher than comparable studies on river delta sites in the Arctic and were influenced by the interaction of a large number of factors including thaw and water table depth, soil temperatures, and net radiation. Spikes in methane emissions were associated with strong winds and turbulence. The Fish Island tundra was a net sink for carbon during the growing season and methane emissions only slightly reduced the overall sink strength. Article in Journal/Newspaper Arctic Arctic Mackenzie river Northwest Territories permafrost Tundra Directory of Open Access Journals: DOAJ Articles Arctic Canada Mackenzie River Northwest Territories Arctic Science 1 27 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English French |
topic |
carbon dioxide methane river delta permafrost peatland dioxyde de carbone Environmental sciences GE1-350 Environmental engineering TA170-171 |
spellingShingle |
carbon dioxide methane river delta permafrost peatland dioxyde de carbone Environmental sciences GE1-350 Environmental engineering TA170-171 June Skeeter Andreas Christen Greg H.R. Henry Controls on carbon dioxide and methane fluxes from a low-center polygonal peatland in the Mackenzie River Delta, Northwest Territories |
topic_facet |
carbon dioxide methane river delta permafrost peatland dioxyde de carbone Environmental sciences GE1-350 Environmental engineering TA170-171 |
description |
Growing season surface–atmosphere exchange of carbon dioxide and methane were quantified at Fish Island, a wetland site in the lower northeast Mackenzie River Delta, Northwest Territories, Canada. The terrain consists of low-center polygonal tundra and is subject to infrequent flooding in high water years. Carbon dioxide and methane fluxes were continuously measured using eddy covariance and the relevance of different environmental controls were identified using neural networks. Net daily carbon dioxide uptake peaked in mid-July before gradually decreasing and transitioning to net daily emissions by September. Variations in light level and temperature were the main controls over diurnal net carbon dioxide uptake, whereas thaw depth and phenology were the main seasonal controls. Methane emissions measured at Fish Island were higher than comparable studies on river delta sites in the Arctic and were influenced by the interaction of a large number of factors including thaw and water table depth, soil temperatures, and net radiation. Spikes in methane emissions were associated with strong winds and turbulence. The Fish Island tundra was a net sink for carbon during the growing season and methane emissions only slightly reduced the overall sink strength. |
format |
Article in Journal/Newspaper |
author |
June Skeeter Andreas Christen Greg H.R. Henry |
author_facet |
June Skeeter Andreas Christen Greg H.R. Henry |
author_sort |
June Skeeter |
title |
Controls on carbon dioxide and methane fluxes from a low-center polygonal peatland in the Mackenzie River Delta, Northwest Territories |
title_short |
Controls on carbon dioxide and methane fluxes from a low-center polygonal peatland in the Mackenzie River Delta, Northwest Territories |
title_full |
Controls on carbon dioxide and methane fluxes from a low-center polygonal peatland in the Mackenzie River Delta, Northwest Territories |
title_fullStr |
Controls on carbon dioxide and methane fluxes from a low-center polygonal peatland in the Mackenzie River Delta, Northwest Territories |
title_full_unstemmed |
Controls on carbon dioxide and methane fluxes from a low-center polygonal peatland in the Mackenzie River Delta, Northwest Territories |
title_sort |
controls on carbon dioxide and methane fluxes from a low-center polygonal peatland in the mackenzie river delta, northwest territories |
publisher |
Canadian Science Publishing |
publishDate |
2022 |
url |
https://doi.org/10.1139/as-2021-0034 https://doaj.org/article/6fd19ca9b39c4ebd9cc8704715068a0d |
geographic |
Arctic Canada Mackenzie River Northwest Territories |
geographic_facet |
Arctic Canada Mackenzie River Northwest Territories |
genre |
Arctic Arctic Mackenzie river Northwest Territories permafrost Tundra |
genre_facet |
Arctic Arctic Mackenzie river Northwest Territories permafrost Tundra |
op_source |
Arctic Science, Vol 8, Iss 2, Pp 471-497 (2022) |
op_relation |
https://cdnsciencepub.com/doi/10.1139/as-2021-0034 https://doaj.org/toc/2368-7460 doi:10.1139/as-2021-0034 2368-7460 https://doaj.org/article/6fd19ca9b39c4ebd9cc8704715068a0d |
op_doi |
https://doi.org/10.1139/as-2021-0034 |
container_title |
Arctic Science |
container_start_page |
1 |
op_container_end_page |
27 |
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1766296310112059392 |