Toward understanding the contribution of waterbodies to the methane emissions of a permafrost landscape on a regional scale—A case study from the Mackenzie Delta, Canada
Abstract Waterbodies in the arctic permafrost zone are considered a major source of the greenhouse gas methane ( CH 4 ) in addition to CH 4 emissions from arctic wetlands. However, the spatio‐temporal variability of CH 4 fluxes from waterbodies complicates spatial extrapolation of CH 4 measurements...
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Online Access: | http://dx.doi.org/10.1111/gcb.14289 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fgcb.14289 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.14289 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gcb.14289 https://onlinelibrary.wiley.com/doi/am-pdf/10.1111/gcb.14289 |
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crwiley:10.1111/gcb.14289 2024-09-15T18:18:09+00:00 Toward understanding the contribution of waterbodies to the methane emissions of a permafrost landscape on a regional scale—A case study from the Mackenzie Delta, Canada Kohnert, Katrin Juhls, Bennet Muster, Sina Antonova, Sofia Serafimovich, Andrei Metzger, Stefan Hartmann, Jörg Sachs, Torsten Helmholtz-Gemeinschaft National Science Foundation Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research 2018 http://dx.doi.org/10.1111/gcb.14289 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fgcb.14289 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.14289 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gcb.14289 https://onlinelibrary.wiley.com/doi/am-pdf/10.1111/gcb.14289 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor Global Change Biology volume 24, issue 9, page 3976-3989 ISSN 1354-1013 1365-2486 journal-article 2018 crwiley https://doi.org/10.1111/gcb.14289 2024-08-01T04:23:21Z Abstract Waterbodies in the arctic permafrost zone are considered a major source of the greenhouse gas methane ( CH 4 ) in addition to CH 4 emissions from arctic wetlands. However, the spatio‐temporal variability of CH 4 fluxes from waterbodies complicates spatial extrapolation of CH 4 measurements from single waterbodies. Therefore, their contribution to the CH 4 budget of the arctic permafrost zone is not yet well understood. Using the example of two study areas of 1,000 km² each in the Mackenzie Delta, Canada, we approach this issue (i) by analyzing correlations on the landscape scale between numerous waterbodies and CH 4 fluxes and (ii) by analyzing the influence of the spatial resolution of CH 4 flux data on the detected relationships. A CH 4 flux map with a resolution of 100 m was derived from two aircraft eddy‐covariance campaigns in the summers of 2012 and 2013. We combined the CH 4 flux map with high spatial resolution (2.5 m) waterbody maps from the Permafrost Region Pond and Lake Database and classified the waterbody depth based on Sentinel‐1 SAR backscatter data. Subsequently, we reduced the resolution of the CH 4 flux map to analyze if different spatial resolutions of CH 4 flux data affected the detectability of relationships between waterbody coverage, number, depth, or size and the CH 4 flux. We did not find consistent correlations between waterbody characteristics and the CH 4 flux in the two study areas across the different resolutions. Our results indicate that waterbodies in permafrost landscapes, even if they seem to be emission hot spots on an individual basis or contain zones of above average emissions, do currently not necessarily translate into significant CH 4 emission hot spots on a regional scale, but their role might change in a warmer climate. Article in Journal/Newspaper Mackenzie Delta permafrost Wiley Online Library Global Change Biology 24 9 3976 3989 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Waterbodies in the arctic permafrost zone are considered a major source of the greenhouse gas methane ( CH 4 ) in addition to CH 4 emissions from arctic wetlands. However, the spatio‐temporal variability of CH 4 fluxes from waterbodies complicates spatial extrapolation of CH 4 measurements from single waterbodies. Therefore, their contribution to the CH 4 budget of the arctic permafrost zone is not yet well understood. Using the example of two study areas of 1,000 km² each in the Mackenzie Delta, Canada, we approach this issue (i) by analyzing correlations on the landscape scale between numerous waterbodies and CH 4 fluxes and (ii) by analyzing the influence of the spatial resolution of CH 4 flux data on the detected relationships. A CH 4 flux map with a resolution of 100 m was derived from two aircraft eddy‐covariance campaigns in the summers of 2012 and 2013. We combined the CH 4 flux map with high spatial resolution (2.5 m) waterbody maps from the Permafrost Region Pond and Lake Database and classified the waterbody depth based on Sentinel‐1 SAR backscatter data. Subsequently, we reduced the resolution of the CH 4 flux map to analyze if different spatial resolutions of CH 4 flux data affected the detectability of relationships between waterbody coverage, number, depth, or size and the CH 4 flux. We did not find consistent correlations between waterbody characteristics and the CH 4 flux in the two study areas across the different resolutions. Our results indicate that waterbodies in permafrost landscapes, even if they seem to be emission hot spots on an individual basis or contain zones of above average emissions, do currently not necessarily translate into significant CH 4 emission hot spots on a regional scale, but their role might change in a warmer climate. |
author2 |
Helmholtz-Gemeinschaft National Science Foundation Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research |
format |
Article in Journal/Newspaper |
author |
Kohnert, Katrin Juhls, Bennet Muster, Sina Antonova, Sofia Serafimovich, Andrei Metzger, Stefan Hartmann, Jörg Sachs, Torsten |
spellingShingle |
Kohnert, Katrin Juhls, Bennet Muster, Sina Antonova, Sofia Serafimovich, Andrei Metzger, Stefan Hartmann, Jörg Sachs, Torsten Toward understanding the contribution of waterbodies to the methane emissions of a permafrost landscape on a regional scale—A case study from the Mackenzie Delta, Canada |
author_facet |
Kohnert, Katrin Juhls, Bennet Muster, Sina Antonova, Sofia Serafimovich, Andrei Metzger, Stefan Hartmann, Jörg Sachs, Torsten |
author_sort |
Kohnert, Katrin |
title |
Toward understanding the contribution of waterbodies to the methane emissions of a permafrost landscape on a regional scale—A case study from the Mackenzie Delta, Canada |
title_short |
Toward understanding the contribution of waterbodies to the methane emissions of a permafrost landscape on a regional scale—A case study from the Mackenzie Delta, Canada |
title_full |
Toward understanding the contribution of waterbodies to the methane emissions of a permafrost landscape on a regional scale—A case study from the Mackenzie Delta, Canada |
title_fullStr |
Toward understanding the contribution of waterbodies to the methane emissions of a permafrost landscape on a regional scale—A case study from the Mackenzie Delta, Canada |
title_full_unstemmed |
Toward understanding the contribution of waterbodies to the methane emissions of a permafrost landscape on a regional scale—A case study from the Mackenzie Delta, Canada |
title_sort |
toward understanding the contribution of waterbodies to the methane emissions of a permafrost landscape on a regional scale—a case study from the mackenzie delta, canada |
publisher |
Wiley |
publishDate |
2018 |
url |
http://dx.doi.org/10.1111/gcb.14289 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fgcb.14289 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.14289 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gcb.14289 https://onlinelibrary.wiley.com/doi/am-pdf/10.1111/gcb.14289 |
genre |
Mackenzie Delta permafrost |
genre_facet |
Mackenzie Delta permafrost |
op_source |
Global Change Biology volume 24, issue 9, page 3976-3989 ISSN 1354-1013 1365-2486 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/gcb.14289 |
container_title |
Global Change Biology |
container_volume |
24 |
container_issue |
9 |
container_start_page |
3976 |
op_container_end_page |
3989 |
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1810456277572124672 |