Annual cycle of methane emission from a subarctic peatland
Although much attention in recent years has been devoted to methane (CH4) emissions from northern wetlands, measurement based data sets providing full annual budgets are still limited in number. This study was designed to help fill the gap of year-round measurements of CH4 emissions from subarctic m...
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Online Access: | https://lup.lub.lu.se/record/1619410 https://doi.org/10.1029/2008JG000913 |
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ftulundlup:oai:lup.lub.lu.se:3d1abf68-3659-435b-995e-cf6ad810c150 2023-05-15T17:57:37+02:00 Annual cycle of methane emission from a subarctic peatland Jackowicz-Korczynski, Marcin Christensen, Torben Backstrand, Kristina Crill, Patrick Friborg, Thomas Mastepanov, Mikhail Ström, Lena 2010 https://lup.lub.lu.se/record/1619410 https://doi.org/10.1029/2008JG000913 eng eng Wiley-Blackwell https://lup.lub.lu.se/record/1619410 http://dx.doi.org/10.1029/2008JG000913 wos:000277259700001 scopus:84864991433 Journal of Geophysical Research; 115 (2010) ISSN: 2156-2202 Physical Geography contributiontojournal/article info:eu-repo/semantics/article text 2010 ftulundlup https://doi.org/10.1029/2008JG000913 2023-02-01T23:29:09Z Although much attention in recent years has been devoted to methane (CH4) emissions from northern wetlands, measurement based data sets providing full annual budgets are still limited in number. This study was designed to help fill the gap of year-round measurements of CH4 emissions from subarctic mires. We report continuous eddy correlation CH4 flux measurements made during 2006 and 2007 over the Stordalen mire in subarctic Sweden (68 degrees 20'N, 19 degrees 03'E, altitude 351 m) using a cryocooled tunable diode laser. The landscape-scale CH4 fluxes originated mainly from the permafrost free wet parts of the mire dominated by tall graminoid vegetation. The midseason average CH4 emission mean was 6.2 +/- 2.6 mg m(-2) h(-1). A detailed footprint analysis indicates an additional strong influence on the flux by the nearby shallow Lake Villasjon (0.17 km(2), maximum depth 1.3 m). A stable bimodal distribution of wind flow from either the east or the west allowed separating the lake and mire vegetation signals. The midseason lake emission rates were as high as 12.3 +/- 3.3 mg m(-2) h(-1). Documented CH4 fluxes are similar to results obtained by automatic chamber technique and higher than manual chamber measurements made in the wet minerotrophic section dominated by Eriophorum angustifolium. The high fluxes observed from this vegetation type are significant because the areal distribution of this source in the mire is expanding due to ongoing thawing of the permafrost. A simple peat temperature relationship with CH4 emissions was used to fill data gaps to construct a complete annual budget of CH4 fluxes over the studied area. The calculated annual CH4 emissions in 2006 and 2007 equaled 24.5 and 29.5 g CH4 m(-2) yr(-1), respectively. The summer season CH4 emissions dominated (65%) the annual flux, with the shoulder seasons of spring and autumn significant (25%) and a minor flux from the winter (10%). Article in Journal/Newspaper permafrost Subarctic Lund University Publications (LUP) Stordalen ENVELOPE(7.337,7.337,62.510,62.510) Journal of Geophysical Research: Biogeosciences 115 G2 n/a n/a |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Physical Geography |
spellingShingle |
Physical Geography Jackowicz-Korczynski, Marcin Christensen, Torben Backstrand, Kristina Crill, Patrick Friborg, Thomas Mastepanov, Mikhail Ström, Lena Annual cycle of methane emission from a subarctic peatland |
topic_facet |
Physical Geography |
description |
Although much attention in recent years has been devoted to methane (CH4) emissions from northern wetlands, measurement based data sets providing full annual budgets are still limited in number. This study was designed to help fill the gap of year-round measurements of CH4 emissions from subarctic mires. We report continuous eddy correlation CH4 flux measurements made during 2006 and 2007 over the Stordalen mire in subarctic Sweden (68 degrees 20'N, 19 degrees 03'E, altitude 351 m) using a cryocooled tunable diode laser. The landscape-scale CH4 fluxes originated mainly from the permafrost free wet parts of the mire dominated by tall graminoid vegetation. The midseason average CH4 emission mean was 6.2 +/- 2.6 mg m(-2) h(-1). A detailed footprint analysis indicates an additional strong influence on the flux by the nearby shallow Lake Villasjon (0.17 km(2), maximum depth 1.3 m). A stable bimodal distribution of wind flow from either the east or the west allowed separating the lake and mire vegetation signals. The midseason lake emission rates were as high as 12.3 +/- 3.3 mg m(-2) h(-1). Documented CH4 fluxes are similar to results obtained by automatic chamber technique and higher than manual chamber measurements made in the wet minerotrophic section dominated by Eriophorum angustifolium. The high fluxes observed from this vegetation type are significant because the areal distribution of this source in the mire is expanding due to ongoing thawing of the permafrost. A simple peat temperature relationship with CH4 emissions was used to fill data gaps to construct a complete annual budget of CH4 fluxes over the studied area. The calculated annual CH4 emissions in 2006 and 2007 equaled 24.5 and 29.5 g CH4 m(-2) yr(-1), respectively. The summer season CH4 emissions dominated (65%) the annual flux, with the shoulder seasons of spring and autumn significant (25%) and a minor flux from the winter (10%). |
format |
Article in Journal/Newspaper |
author |
Jackowicz-Korczynski, Marcin Christensen, Torben Backstrand, Kristina Crill, Patrick Friborg, Thomas Mastepanov, Mikhail Ström, Lena |
author_facet |
Jackowicz-Korczynski, Marcin Christensen, Torben Backstrand, Kristina Crill, Patrick Friborg, Thomas Mastepanov, Mikhail Ström, Lena |
author_sort |
Jackowicz-Korczynski, Marcin |
title |
Annual cycle of methane emission from a subarctic peatland |
title_short |
Annual cycle of methane emission from a subarctic peatland |
title_full |
Annual cycle of methane emission from a subarctic peatland |
title_fullStr |
Annual cycle of methane emission from a subarctic peatland |
title_full_unstemmed |
Annual cycle of methane emission from a subarctic peatland |
title_sort |
annual cycle of methane emission from a subarctic peatland |
publisher |
Wiley-Blackwell |
publishDate |
2010 |
url |
https://lup.lub.lu.se/record/1619410 https://doi.org/10.1029/2008JG000913 |
long_lat |
ENVELOPE(7.337,7.337,62.510,62.510) |
geographic |
Stordalen |
geographic_facet |
Stordalen |
genre |
permafrost Subarctic |
genre_facet |
permafrost Subarctic |
op_source |
Journal of Geophysical Research; 115 (2010) ISSN: 2156-2202 |
op_relation |
https://lup.lub.lu.se/record/1619410 http://dx.doi.org/10.1029/2008JG000913 wos:000277259700001 scopus:84864991433 |
op_doi |
https://doi.org/10.1029/2008JG000913 |
container_title |
Journal of Geophysical Research: Biogeosciences |
container_volume |
115 |
container_issue |
G2 |
container_start_page |
n/a |
op_container_end_page |
n/a |
_version_ |
1766166098951012352 |