The impact of permafrost degradation on methane fluxes : a field study in Abisko
All over the arctic and sub-arctic region global warming is affecting permafrost. When permafrost thaws, organic material becomes available for decomposition, hence an increase of greenhouse gas emissions to the atmosphere. In the northernmost of Sweden, on a mire close to Abisko, a snow manipulatio...
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Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap
2016
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ftulundlupsp:oai:lup-student-papers.lub.lu.se:8871444 2023-07-30T03:55:21+02:00 The impact of permafrost degradation on methane fluxes : a field study in Abisko Dahlbom, Andreas 2016 application/pdf http://lup.lub.lu.se/student-papers/record/8871444 eng eng Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap http://lup.lub.lu.se/student-papers/record/8871444 Physical Geography and Ecosystem analysis methane chamber technique permafrost Abisko Earth and Environmental Sciences H2 2016 ftulundlupsp 2023-07-11T20:07:14Z All over the arctic and sub-arctic region global warming is affecting permafrost. When permafrost thaws, organic material becomes available for decomposition, hence an increase of greenhouse gas emissions to the atmosphere. In the northernmost of Sweden, on a mire close to Abisko, a snow manipulation project is ongoing. The experiment is trying to mimic predictions of future conditions and advance the thawing of permafrost. This is done by setting up snow fences which concentrated the snow to a certain area. In this thesis the measurements of methane were conducted inside of the existing snow manipulation project with the closed chamber technique, both in control and manipulated plots. Other variables that could affect the emissions were also collected or measured. The results show much higher methane emissions from manipulated plots. Average emissions from manipulated plots were 0.66 mg CH4 m-2 h-1 compared to 0.16 mg CH4 m-2 h-1 from control plots. Variables that showed the highest correlation with the methane flux was water table and active layer. Higher water table and thicker active layer for manipulated plots (higher emissions of CH4) and the opposite for control plots (lower emissions of CH4). If the trend of the global warming is continuing it will lead to even more thawing of permafrost. Then even more organic material will be available for decomposition and even more methane will be produced, adding to the global warming. All over the arctic and sub-arctic region global warming is affecting permafrost. When permafrost thaws, organic material that has been frozen shut in the soil becomes available for decomposition. During the process of decomposition greenhouse gases such as methane is produced, hence adding to global warming. In the northernmost of Sweden, on a mire close to Abisko, there is an ongoing experiment with permafrost. The experiment is trying to mimic predictions of future conditions and advance the thawing of permafrost. This was done by setting up a snow fence which concentrated the ... Other/Unknown Material Abisko Arctic Global warming permafrost Lund University Publications Student Papers (LUP-SP) Arctic Abisko ENVELOPE(18.829,18.829,68.349,68.349) |
institution |
Open Polar |
collection |
Lund University Publications Student Papers (LUP-SP) |
op_collection_id |
ftulundlupsp |
language |
English |
topic |
Physical Geography and Ecosystem analysis methane chamber technique permafrost Abisko Earth and Environmental Sciences |
spellingShingle |
Physical Geography and Ecosystem analysis methane chamber technique permafrost Abisko Earth and Environmental Sciences Dahlbom, Andreas The impact of permafrost degradation on methane fluxes : a field study in Abisko |
topic_facet |
Physical Geography and Ecosystem analysis methane chamber technique permafrost Abisko Earth and Environmental Sciences |
description |
All over the arctic and sub-arctic region global warming is affecting permafrost. When permafrost thaws, organic material becomes available for decomposition, hence an increase of greenhouse gas emissions to the atmosphere. In the northernmost of Sweden, on a mire close to Abisko, a snow manipulation project is ongoing. The experiment is trying to mimic predictions of future conditions and advance the thawing of permafrost. This is done by setting up snow fences which concentrated the snow to a certain area. In this thesis the measurements of methane were conducted inside of the existing snow manipulation project with the closed chamber technique, both in control and manipulated plots. Other variables that could affect the emissions were also collected or measured. The results show much higher methane emissions from manipulated plots. Average emissions from manipulated plots were 0.66 mg CH4 m-2 h-1 compared to 0.16 mg CH4 m-2 h-1 from control plots. Variables that showed the highest correlation with the methane flux was water table and active layer. Higher water table and thicker active layer for manipulated plots (higher emissions of CH4) and the opposite for control plots (lower emissions of CH4). If the trend of the global warming is continuing it will lead to even more thawing of permafrost. Then even more organic material will be available for decomposition and even more methane will be produced, adding to the global warming. All over the arctic and sub-arctic region global warming is affecting permafrost. When permafrost thaws, organic material that has been frozen shut in the soil becomes available for decomposition. During the process of decomposition greenhouse gases such as methane is produced, hence adding to global warming. In the northernmost of Sweden, on a mire close to Abisko, there is an ongoing experiment with permafrost. The experiment is trying to mimic predictions of future conditions and advance the thawing of permafrost. This was done by setting up a snow fence which concentrated the ... |
format |
Other/Unknown Material |
author |
Dahlbom, Andreas |
author_facet |
Dahlbom, Andreas |
author_sort |
Dahlbom, Andreas |
title |
The impact of permafrost degradation on methane fluxes : a field study in Abisko |
title_short |
The impact of permafrost degradation on methane fluxes : a field study in Abisko |
title_full |
The impact of permafrost degradation on methane fluxes : a field study in Abisko |
title_fullStr |
The impact of permafrost degradation on methane fluxes : a field study in Abisko |
title_full_unstemmed |
The impact of permafrost degradation on methane fluxes : a field study in Abisko |
title_sort |
impact of permafrost degradation on methane fluxes : a field study in abisko |
publisher |
Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap |
publishDate |
2016 |
url |
http://lup.lub.lu.se/student-papers/record/8871444 |
long_lat |
ENVELOPE(18.829,18.829,68.349,68.349) |
geographic |
Arctic Abisko |
geographic_facet |
Arctic Abisko |
genre |
Abisko Arctic Global warming permafrost |
genre_facet |
Abisko Arctic Global warming permafrost |
op_relation |
http://lup.lub.lu.se/student-papers/record/8871444 |
_version_ |
1772812477750312960 |