Methane and carbon dioxide emissions from thermokarst lakes on mineral soils.
Thermokarst lakes are known to emit methane (CH₄) and carbon dioxide (CO₂), but little attention has been given to those formed from the thawing and collapse of lithalsas, ice-rich mineral soil mounds that occur in permafrost landscapes. The present study was undertaken to assess greenhouse gas stoc...
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Online Access: | https://espace.inrs.ca/id/eprint/7280/ https://espace.inrs.ca/id/eprint/7280/1/P3344.pdf https://doi.org/10.1139/AS-2017-0047 |
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ftinrsquebec:oai:espace.inrs.ca:7280 2023-05-15T14:26:26+02:00 Methane and carbon dioxide emissions from thermokarst lakes on mineral soils. Matveev, Alex Laurion, Isabelle Vincent, Warwick 2018 application/pdf https://espace.inrs.ca/id/eprint/7280/ https://espace.inrs.ca/id/eprint/7280/1/P3344.pdf https://doi.org/10.1139/AS-2017-0047 en eng https://espace.inrs.ca/id/eprint/7280/1/P3344.pdf Matveev, Alex, Laurion, Isabelle orcid:0000-0001-8694-3330 et Vincent, Warwick (2018). Methane and carbon dioxide emissions from thermokarst lakes on mineral soils. Arctic Science , vol. 4 , nº 4. p. 584-604. DOI:10.1139/AS-2017-0047 <https://doi.org/10.1139/AS-2017-0047>. doi:10.1139/AS-2017-0047 lithalsa methane permafrost subarctic thermokarst Article Évalué par les pairs 2018 ftinrsquebec https://doi.org/10.1139/AS-2017-0047 2023-02-10T11:44:30Z Thermokarst lakes are known to emit methane (CH₄) and carbon dioxide (CO₂), but little attention has been given to those formed from the thawing and collapse of lithalsas, ice-rich mineral soil mounds that occur in permafrost landscapes. The present study was undertaken to assess greenhouse gas stocks and fluxes in eight lithalsa lakes across a 200-km gradient of permafrost degradation in subarctic Québec. The northernmost lakes varied in their surface-water CO₂ content, from below to above saturation, but the southern lakes in this gradient had much higher surface concentrations that were well above air-equilibrium. Surface-water CH₄ concentrations were at least an order of magnitude above air-equilibrium values at all sites, and the diffusive fluxes of both gases increased from north to south. Methane oxidation in the surface waters from a northern lake was only 10% of the emission rate, but at the southern end it was around 60% of the efflux to the atmosphere, indicating that methanotrophy can play a substantive role in reducing net emissions. Overall, our observations show that lithalsa lakes can begin emitting CH₄ and CO₂ soon after they form, with effluxes of both gases that persist and increase as the permafrost continues to warm and erode. Article in Journal/Newspaper Arctic Ice permafrost Subarctic Thermokarst Institut national de la recherche scientifique, Québec: Espace INRS Arctic Science 4 4 584 604 |
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Open Polar |
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Institut national de la recherche scientifique, Québec: Espace INRS |
op_collection_id |
ftinrsquebec |
language |
English |
topic |
lithalsa methane permafrost subarctic thermokarst |
spellingShingle |
lithalsa methane permafrost subarctic thermokarst Matveev, Alex Laurion, Isabelle Vincent, Warwick Methane and carbon dioxide emissions from thermokarst lakes on mineral soils. |
topic_facet |
lithalsa methane permafrost subarctic thermokarst |
description |
Thermokarst lakes are known to emit methane (CH₄) and carbon dioxide (CO₂), but little attention has been given to those formed from the thawing and collapse of lithalsas, ice-rich mineral soil mounds that occur in permafrost landscapes. The present study was undertaken to assess greenhouse gas stocks and fluxes in eight lithalsa lakes across a 200-km gradient of permafrost degradation in subarctic Québec. The northernmost lakes varied in their surface-water CO₂ content, from below to above saturation, but the southern lakes in this gradient had much higher surface concentrations that were well above air-equilibrium. Surface-water CH₄ concentrations were at least an order of magnitude above air-equilibrium values at all sites, and the diffusive fluxes of both gases increased from north to south. Methane oxidation in the surface waters from a northern lake was only 10% of the emission rate, but at the southern end it was around 60% of the efflux to the atmosphere, indicating that methanotrophy can play a substantive role in reducing net emissions. Overall, our observations show that lithalsa lakes can begin emitting CH₄ and CO₂ soon after they form, with effluxes of both gases that persist and increase as the permafrost continues to warm and erode. |
format |
Article in Journal/Newspaper |
author |
Matveev, Alex Laurion, Isabelle Vincent, Warwick |
author_facet |
Matveev, Alex Laurion, Isabelle Vincent, Warwick |
author_sort |
Matveev, Alex |
title |
Methane and carbon dioxide emissions from thermokarst lakes on mineral soils. |
title_short |
Methane and carbon dioxide emissions from thermokarst lakes on mineral soils. |
title_full |
Methane and carbon dioxide emissions from thermokarst lakes on mineral soils. |
title_fullStr |
Methane and carbon dioxide emissions from thermokarst lakes on mineral soils. |
title_full_unstemmed |
Methane and carbon dioxide emissions from thermokarst lakes on mineral soils. |
title_sort |
methane and carbon dioxide emissions from thermokarst lakes on mineral soils. |
publishDate |
2018 |
url |
https://espace.inrs.ca/id/eprint/7280/ https://espace.inrs.ca/id/eprint/7280/1/P3344.pdf https://doi.org/10.1139/AS-2017-0047 |
genre |
Arctic Ice permafrost Subarctic Thermokarst |
genre_facet |
Arctic Ice permafrost Subarctic Thermokarst |
op_relation |
https://espace.inrs.ca/id/eprint/7280/1/P3344.pdf Matveev, Alex, Laurion, Isabelle orcid:0000-0001-8694-3330 et Vincent, Warwick (2018). Methane and carbon dioxide emissions from thermokarst lakes on mineral soils. Arctic Science , vol. 4 , nº 4. p. 584-604. DOI:10.1139/AS-2017-0047 <https://doi.org/10.1139/AS-2017-0047>. doi:10.1139/AS-2017-0047 |
op_doi |
https://doi.org/10.1139/AS-2017-0047 |
container_title |
Arctic Science |
container_volume |
4 |
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4 |
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584 |
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604 |
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