Revisiting factors controlling methane emissions from high-Arctic tundra
The northern latitudes are experiencing disproportionate warming relative to the mid-latitudes, and there is growing concern about feedbacks between this warming and methane production and release from high-latitude soils. Studies of methane emissions carried out in the Arctic, particularly those wi...
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ftdoajarticles:oai:doaj.org/article:b0d61d72e51643fe9c0daf8ac40e2e72 2023-05-15T14:56:56+02:00 Revisiting factors controlling methane emissions from high-Arctic tundra M. Mastepanov C. Sigsgaard T. Tagesson L. Ström M. P. Tamstorf M. Lund T. R. Christensen 2013-07-01T00:00:00Z https://doi.org/10.5194/bg-10-5139-2013 https://doaj.org/article/b0d61d72e51643fe9c0daf8ac40e2e72 EN eng Copernicus Publications http://www.biogeosciences.net/10/5139/2013/bg-10-5139-2013.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-10-5139-2013 1726-4170 1726-4189 https://doaj.org/article/b0d61d72e51643fe9c0daf8ac40e2e72 Biogeosciences, Vol 10, Iss 7, Pp 5139-5158 (2013) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2013 ftdoajarticles https://doi.org/10.5194/bg-10-5139-2013 2022-12-31T10:36:08Z The northern latitudes are experiencing disproportionate warming relative to the mid-latitudes, and there is growing concern about feedbacks between this warming and methane production and release from high-latitude soils. Studies of methane emissions carried out in the Arctic, particularly those with measurements made outside the growing season, are underrepresented in the literature. Here we present results of 5 yr (2006–2010) of automatic chamber measurements at a high-Arctic location in Zackenberg, NE Greenland, covering both the growing seasons and two months of the following freeze-in periods. The measurements show clear seasonal dynamics in methane emission. The start of the growing season and the increase in CH 4 fluxes were strongly related to the date of snowmelt. Within each particular growing season, CH 4 fluxes were highly correlated with the soil temperature ( R 2 > 0.75), which is probably explained by high seasonality of both variables, and weakly correlated with the water table. The greatest variability in fluxes between the study years was observed during the first part of the growing season. Somewhat surprisingly, this variability could not be explained by commonly known factors controlling methane emission, i.e. temperature and water table position. Late in the growing season CH 4 emissions were found to be very similar between the study years (except the extremely dry 2010) despite large differences in climatic factors (temperature and water table). Late-season bursts of CH 4 coinciding with soil freezing in the autumn were observed during at least three years. The cumulative emission during the freeze-in CH 4 bursts was comparable in size with the growing season emission for the year 2007, and about one third of the growing season emissions for the years 2009 and 2010. In all three cases the CH 4 burst was accompanied by a corresponding episodic increase in CO 2 emission, which can compose a significant contribution to the annual CO 2 flux budget. The most probable mechanism of the ... Article in Journal/Newspaper Arctic Greenland Tundra Zackenberg Directory of Open Access Journals: DOAJ Articles Arctic Greenland Biogeosciences 10 7 5139 5158 |
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English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
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Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 M. Mastepanov C. Sigsgaard T. Tagesson L. Ström M. P. Tamstorf M. Lund T. R. Christensen Revisiting factors controlling methane emissions from high-Arctic tundra |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
The northern latitudes are experiencing disproportionate warming relative to the mid-latitudes, and there is growing concern about feedbacks between this warming and methane production and release from high-latitude soils. Studies of methane emissions carried out in the Arctic, particularly those with measurements made outside the growing season, are underrepresented in the literature. Here we present results of 5 yr (2006–2010) of automatic chamber measurements at a high-Arctic location in Zackenberg, NE Greenland, covering both the growing seasons and two months of the following freeze-in periods. The measurements show clear seasonal dynamics in methane emission. The start of the growing season and the increase in CH 4 fluxes were strongly related to the date of snowmelt. Within each particular growing season, CH 4 fluxes were highly correlated with the soil temperature ( R 2 > 0.75), which is probably explained by high seasonality of both variables, and weakly correlated with the water table. The greatest variability in fluxes between the study years was observed during the first part of the growing season. Somewhat surprisingly, this variability could not be explained by commonly known factors controlling methane emission, i.e. temperature and water table position. Late in the growing season CH 4 emissions were found to be very similar between the study years (except the extremely dry 2010) despite large differences in climatic factors (temperature and water table). Late-season bursts of CH 4 coinciding with soil freezing in the autumn were observed during at least three years. The cumulative emission during the freeze-in CH 4 bursts was comparable in size with the growing season emission for the year 2007, and about one third of the growing season emissions for the years 2009 and 2010. In all three cases the CH 4 burst was accompanied by a corresponding episodic increase in CO 2 emission, which can compose a significant contribution to the annual CO 2 flux budget. The most probable mechanism of the ... |
format |
Article in Journal/Newspaper |
author |
M. Mastepanov C. Sigsgaard T. Tagesson L. Ström M. P. Tamstorf M. Lund T. R. Christensen |
author_facet |
M. Mastepanov C. Sigsgaard T. Tagesson L. Ström M. P. Tamstorf M. Lund T. R. Christensen |
author_sort |
M. Mastepanov |
title |
Revisiting factors controlling methane emissions from high-Arctic tundra |
title_short |
Revisiting factors controlling methane emissions from high-Arctic tundra |
title_full |
Revisiting factors controlling methane emissions from high-Arctic tundra |
title_fullStr |
Revisiting factors controlling methane emissions from high-Arctic tundra |
title_full_unstemmed |
Revisiting factors controlling methane emissions from high-Arctic tundra |
title_sort |
revisiting factors controlling methane emissions from high-arctic tundra |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://doi.org/10.5194/bg-10-5139-2013 https://doaj.org/article/b0d61d72e51643fe9c0daf8ac40e2e72 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland Tundra Zackenberg |
genre_facet |
Arctic Greenland Tundra Zackenberg |
op_source |
Biogeosciences, Vol 10, Iss 7, Pp 5139-5158 (2013) |
op_relation |
http://www.biogeosciences.net/10/5139/2013/bg-10-5139-2013.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-10-5139-2013 1726-4170 1726-4189 https://doaj.org/article/b0d61d72e51643fe9c0daf8ac40e2e72 |
op_doi |
https://doi.org/10.5194/bg-10-5139-2013 |
container_title |
Biogeosciences |
container_volume |
10 |
container_issue |
7 |
container_start_page |
5139 |
op_container_end_page |
5158 |
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1766328996278042624 |