Ice wedge degradation and CO2 and CH4 emissions in the Tuktoyaktuk Coastlands, Northwest Territories
Increases in ground temperature make soil organic carbon in permafrost environments highly vulnerable to release to the atmosphere. High-centred polygonal terrain is a form of patterned ground that may act as a large source of carbon to the atmosphere because thawing ice wedges can result in increas...
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Canadian Science Publishing
2018
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Online Access: | https://doi.org/10.1139/as-2016-0011 https://doaj.org/article/0fd938f888aa4be8976d7be933a49ec8 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:0fd938f888aa4be8976d7be933a49ec8 2023-05-15T14:22:19+02:00 Ice wedge degradation and CO2 and CH4 emissions in the Tuktoyaktuk Coastlands, Northwest Territories Abra F. Martin Trevor C. Lantz Elyn R. Humphreys 2018-03-01 https://doi.org/10.1139/as-2016-0011 https://doaj.org/article/0fd938f888aa4be8976d7be933a49ec8 en fr eng fre Canadian Science Publishing doi:10.1139/as-2016-0011 2368-7460 https://doaj.org/article/0fd938f888aa4be8976d7be933a49ec8 undefined Arctic Science, Vol 4, Iss 1, Pp 130-145 (2018) carbon dioxide methane permafrost thermokarst envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2018 fttriple https://doi.org/10.1139/as-2016-0011 2023-01-22T18:19:40Z Increases in ground temperature make soil organic carbon in permafrost environments highly vulnerable to release to the atmosphere. High-centred polygonal terrain is a form of patterned ground that may act as a large source of carbon to the atmosphere because thawing ice wedges can result in increased ground temperatures, soil moisture, and thaw depth. To evaluate the effect of ice wedge degradation on carbon flux, carbon emissions were characterized at two polygonal peatlands in the Tuktoyaktuk Coastlands in northern Canada. Opaque chambers were used to measure CO2 and CH4 emissions from nine nondegraded polygon centres and nine moderately degraded troughs four times during the growing season. To measure emissions from 10 ponds resulting from severe ice wedge degradation, wind diffusion models were used to characterize fluxes using CO2 and CH4 concentration measurements made in each pond. Our field data show that degraded troughs had increased ground temperature, deeper active layers, and increased CO2 and CH4 emissions. Our study shows that rates of CO2 and CH4 emissions from high-centreed polygonal terrain are likely to increase with more widespread melt pond formation in this terrain type. Article in Journal/Newspaper Arctic Ice Northwest Territories permafrost Thermokarst Tuktoyaktuk wedge* Unknown Northwest Territories Canada Tuktoyaktuk ENVELOPE(-133.006,-133.006,69.425,69.425) Arctic Science |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English French |
topic |
carbon dioxide methane permafrost thermokarst envir geo |
spellingShingle |
carbon dioxide methane permafrost thermokarst envir geo Abra F. Martin Trevor C. Lantz Elyn R. Humphreys Ice wedge degradation and CO2 and CH4 emissions in the Tuktoyaktuk Coastlands, Northwest Territories |
topic_facet |
carbon dioxide methane permafrost thermokarst envir geo |
description |
Increases in ground temperature make soil organic carbon in permafrost environments highly vulnerable to release to the atmosphere. High-centred polygonal terrain is a form of patterned ground that may act as a large source of carbon to the atmosphere because thawing ice wedges can result in increased ground temperatures, soil moisture, and thaw depth. To evaluate the effect of ice wedge degradation on carbon flux, carbon emissions were characterized at two polygonal peatlands in the Tuktoyaktuk Coastlands in northern Canada. Opaque chambers were used to measure CO2 and CH4 emissions from nine nondegraded polygon centres and nine moderately degraded troughs four times during the growing season. To measure emissions from 10 ponds resulting from severe ice wedge degradation, wind diffusion models were used to characterize fluxes using CO2 and CH4 concentration measurements made in each pond. Our field data show that degraded troughs had increased ground temperature, deeper active layers, and increased CO2 and CH4 emissions. Our study shows that rates of CO2 and CH4 emissions from high-centreed polygonal terrain are likely to increase with more widespread melt pond formation in this terrain type. |
format |
Article in Journal/Newspaper |
author |
Abra F. Martin Trevor C. Lantz Elyn R. Humphreys |
author_facet |
Abra F. Martin Trevor C. Lantz Elyn R. Humphreys |
author_sort |
Abra F. Martin |
title |
Ice wedge degradation and CO2 and CH4 emissions in the Tuktoyaktuk Coastlands, Northwest Territories |
title_short |
Ice wedge degradation and CO2 and CH4 emissions in the Tuktoyaktuk Coastlands, Northwest Territories |
title_full |
Ice wedge degradation and CO2 and CH4 emissions in the Tuktoyaktuk Coastlands, Northwest Territories |
title_fullStr |
Ice wedge degradation and CO2 and CH4 emissions in the Tuktoyaktuk Coastlands, Northwest Territories |
title_full_unstemmed |
Ice wedge degradation and CO2 and CH4 emissions in the Tuktoyaktuk Coastlands, Northwest Territories |
title_sort |
ice wedge degradation and co2 and ch4 emissions in the tuktoyaktuk coastlands, northwest territories |
publisher |
Canadian Science Publishing |
publishDate |
2018 |
url |
https://doi.org/10.1139/as-2016-0011 https://doaj.org/article/0fd938f888aa4be8976d7be933a49ec8 |
long_lat |
ENVELOPE(-133.006,-133.006,69.425,69.425) |
geographic |
Northwest Territories Canada Tuktoyaktuk |
geographic_facet |
Northwest Territories Canada Tuktoyaktuk |
genre |
Arctic Ice Northwest Territories permafrost Thermokarst Tuktoyaktuk wedge* |
genre_facet |
Arctic Ice Northwest Territories permafrost Thermokarst Tuktoyaktuk wedge* |
op_source |
Arctic Science, Vol 4, Iss 1, Pp 130-145 (2018) |
op_relation |
doi:10.1139/as-2016-0011 2368-7460 https://doaj.org/article/0fd938f888aa4be8976d7be933a49ec8 |
op_rights |
undefined |
op_doi |
https://doi.org/10.1139/as-2016-0011 |
container_title |
Arctic Science |
_version_ |
1766294954007592960 |