Seasonal dynamics of methane emissions from a subarctic fen in the Hudson Bay Lowlands
Ecosystem-scale methane (CH 4 ) flux ( F CH 4 ) over a subarctic fen at Churchill, Manitoba, Canada was measured to understand the magnitude of emissions during spring and fall shoulder seasons, and the growing season in relation to physical and biological conditions. F CH 4 was measured using eddy...
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ftdoajarticles:oai:doaj.org/article:c42fee1f52a94a0398fe48725f83143a 2023-05-15T15:55:07+02:00 Seasonal dynamics of methane emissions from a subarctic fen in the Hudson Bay Lowlands K. L. Hanis M. Tenuta B. D. Amiro T. N. Papakyriakou 2013-07-01T00:00:00Z https://doi.org/10.5194/bg-10-4465-2013 https://doaj.org/article/c42fee1f52a94a0398fe48725f83143a EN eng Copernicus Publications http://www.biogeosciences.net/10/4465/2013/bg-10-4465-2013.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-10-4465-2013 1726-4170 1726-4189 https://doaj.org/article/c42fee1f52a94a0398fe48725f83143a Biogeosciences, Vol 10, Iss 7, Pp 4465-4479 (2013) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2013 ftdoajarticles https://doi.org/10.5194/bg-10-4465-2013 2022-12-31T03:21:34Z Ecosystem-scale methane (CH 4 ) flux ( F CH 4 ) over a subarctic fen at Churchill, Manitoba, Canada was measured to understand the magnitude of emissions during spring and fall shoulder seasons, and the growing season in relation to physical and biological conditions. F CH 4 was measured using eddy covariance with a closed-path analyser in four years (2008–2011). Cumulative measured annual F CH 4 (shoulder plus growing seasons) ranged from 3.0 to 9.6 g CH 4 m −2 yr −1 among the four study years, with a mean of 6.5 to 7.1 g CH 4 m −2 yr −1 depending upon gap-filling method. Soil temperatures to depths of 50 cm and air temperature were highly correlated with F CH 4 , with near-surface soil temperature at 5 cm most correlated across spring, fall, and the shoulder and growing seasons. The response of F CH 4 to soil temperature at the 5 cm depth and air temperature was more than double in spring to that of fall. Emission episodes were generally not observed during spring thaw. Growing season emissions also depended upon soil and air temperatures but the water table also exerted influence, with F CH 4 highest when water was 2–13 cm below and lowest when it was at or above the mean peat surface. Article in Journal/Newspaper Churchill Hudson Bay Subarctic Directory of Open Access Journals: DOAJ Articles Hudson Bay Canada Hudson Biogeosciences 10 7 4465 4479 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
spellingShingle |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 K. L. Hanis M. Tenuta B. D. Amiro T. N. Papakyriakou Seasonal dynamics of methane emissions from a subarctic fen in the Hudson Bay Lowlands |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
Ecosystem-scale methane (CH 4 ) flux ( F CH 4 ) over a subarctic fen at Churchill, Manitoba, Canada was measured to understand the magnitude of emissions during spring and fall shoulder seasons, and the growing season in relation to physical and biological conditions. F CH 4 was measured using eddy covariance with a closed-path analyser in four years (2008–2011). Cumulative measured annual F CH 4 (shoulder plus growing seasons) ranged from 3.0 to 9.6 g CH 4 m −2 yr −1 among the four study years, with a mean of 6.5 to 7.1 g CH 4 m −2 yr −1 depending upon gap-filling method. Soil temperatures to depths of 50 cm and air temperature were highly correlated with F CH 4 , with near-surface soil temperature at 5 cm most correlated across spring, fall, and the shoulder and growing seasons. The response of F CH 4 to soil temperature at the 5 cm depth and air temperature was more than double in spring to that of fall. Emission episodes were generally not observed during spring thaw. Growing season emissions also depended upon soil and air temperatures but the water table also exerted influence, with F CH 4 highest when water was 2–13 cm below and lowest when it was at or above the mean peat surface. |
format |
Article in Journal/Newspaper |
author |
K. L. Hanis M. Tenuta B. D. Amiro T. N. Papakyriakou |
author_facet |
K. L. Hanis M. Tenuta B. D. Amiro T. N. Papakyriakou |
author_sort |
K. L. Hanis |
title |
Seasonal dynamics of methane emissions from a subarctic fen in the Hudson Bay Lowlands |
title_short |
Seasonal dynamics of methane emissions from a subarctic fen in the Hudson Bay Lowlands |
title_full |
Seasonal dynamics of methane emissions from a subarctic fen in the Hudson Bay Lowlands |
title_fullStr |
Seasonal dynamics of methane emissions from a subarctic fen in the Hudson Bay Lowlands |
title_full_unstemmed |
Seasonal dynamics of methane emissions from a subarctic fen in the Hudson Bay Lowlands |
title_sort |
seasonal dynamics of methane emissions from a subarctic fen in the hudson bay lowlands |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://doi.org/10.5194/bg-10-4465-2013 https://doaj.org/article/c42fee1f52a94a0398fe48725f83143a |
geographic |
Hudson Bay Canada Hudson |
geographic_facet |
Hudson Bay Canada Hudson |
genre |
Churchill Hudson Bay Subarctic |
genre_facet |
Churchill Hudson Bay Subarctic |
op_source |
Biogeosciences, Vol 10, Iss 7, Pp 4465-4479 (2013) |
op_relation |
http://www.biogeosciences.net/10/4465/2013/bg-10-4465-2013.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-10-4465-2013 1726-4170 1726-4189 https://doaj.org/article/c42fee1f52a94a0398fe48725f83143a |
op_doi |
https://doi.org/10.5194/bg-10-4465-2013 |
container_title |
Biogeosciences |
container_volume |
10 |
container_issue |
7 |
container_start_page |
4465 |
op_container_end_page |
4479 |
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1766390459920285696 |