Opposing Effects of Climate and Permafrost Thaw on CH 4 and CO 2 Emissions From Northern Lakes
Funder: Natural Sciences and Engineering Research Council Funder: Northern Scientific Training Program, University of Alberta Funder: UAlberta North, Vanier Canada Graduate ScholarshipW. Garfield Weston Foundation <jats:title>Abstract</jats:title><jats:p>Small, organic‐rich lakes a...
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American Geophysical Union (AGU)
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ftunivcam:oai:www.repository.cam.ac.uk:1810/330614 2024-01-28T10:08:32+01:00 Opposing Effects of Climate and Permafrost Thaw on CH 4 and CO 2 Emissions From Northern Lakes Kuhn, McKenzie A Thompson, Lauren M Winder, Johanna C Braga, Lucas PP Tanentzap, Andrew J Bastviken, David Olefeldt, David 2021-11-12T18:57:06Z text/xml application/pdf https://www.repository.cam.ac.uk/handle/1810/330614 https://doi.org/10.17863/CAM.78058 en eng eng American Geophysical Union (AGU) http://dx.doi.org/10.1029/2021av000515 AGU ADVANCES https://www.repository.cam.ac.uk/handle/1810/330614 doi:10.17863/CAM.78058 greenhouse gas aquatic permafrost lakes climate warming Article 2021 ftunivcam https://doi.org/10.17863/CAM.78058 2024-01-04T23:19:08Z Funder: Natural Sciences and Engineering Research Council Funder: Northern Scientific Training Program, University of Alberta Funder: UAlberta North, Vanier Canada Graduate ScholarshipW. Garfield Weston Foundation <jats:title>Abstract</jats:title><jats:p>Small, organic‐rich lakes are important sources of methane (CH<jats:sub>4</jats:sub>) and carbon dioxide (CO<jats:sub>2</jats:sub>) to the atmosphere, yet the sensitivity of emissions to climate warming is poorly constrained and potentially influenced by permafrost thaw. Here, we monitored emissions from 20 peatland lakes across a 1,600 km permafrost transect in boreal western Canada. Contrary to expectations, we observed a shift from source to sink of CO<jats:sub>2</jats:sub> for lakes warmer regions, driven by greater primary productivity associated with greater hydrological connectivity to lakes and nutrient availability in the absence of permafrost. Conversely, an 8‐fold increase in CH<jats:sub>4</jats:sub> emissions in warmer regions was associated with water temperature and shifts in microbial communities and dominant anaerobic processes. Our results suggest that the net radiative forcing from altered greenhouse gas emissions of northern peatland lakes this century will be dominated by increasing CH<jats:sub>4</jats:sub> emissions and only partially offset by reduced CO<jats:sub>2</jats:sub> emissions.</jats:p> Article in Journal/Newspaper permafrost Apollo - University of Cambridge Repository Canada |
institution |
Open Polar |
collection |
Apollo - University of Cambridge Repository |
op_collection_id |
ftunivcam |
language |
English |
topic |
greenhouse gas aquatic permafrost lakes climate warming |
spellingShingle |
greenhouse gas aquatic permafrost lakes climate warming Kuhn, McKenzie A Thompson, Lauren M Winder, Johanna C Braga, Lucas PP Tanentzap, Andrew J Bastviken, David Olefeldt, David Opposing Effects of Climate and Permafrost Thaw on CH 4 and CO 2 Emissions From Northern Lakes |
topic_facet |
greenhouse gas aquatic permafrost lakes climate warming |
description |
Funder: Natural Sciences and Engineering Research Council Funder: Northern Scientific Training Program, University of Alberta Funder: UAlberta North, Vanier Canada Graduate ScholarshipW. Garfield Weston Foundation <jats:title>Abstract</jats:title><jats:p>Small, organic‐rich lakes are important sources of methane (CH<jats:sub>4</jats:sub>) and carbon dioxide (CO<jats:sub>2</jats:sub>) to the atmosphere, yet the sensitivity of emissions to climate warming is poorly constrained and potentially influenced by permafrost thaw. Here, we monitored emissions from 20 peatland lakes across a 1,600 km permafrost transect in boreal western Canada. Contrary to expectations, we observed a shift from source to sink of CO<jats:sub>2</jats:sub> for lakes warmer regions, driven by greater primary productivity associated with greater hydrological connectivity to lakes and nutrient availability in the absence of permafrost. Conversely, an 8‐fold increase in CH<jats:sub>4</jats:sub> emissions in warmer regions was associated with water temperature and shifts in microbial communities and dominant anaerobic processes. Our results suggest that the net radiative forcing from altered greenhouse gas emissions of northern peatland lakes this century will be dominated by increasing CH<jats:sub>4</jats:sub> emissions and only partially offset by reduced CO<jats:sub>2</jats:sub> emissions.</jats:p> |
format |
Article in Journal/Newspaper |
author |
Kuhn, McKenzie A Thompson, Lauren M Winder, Johanna C Braga, Lucas PP Tanentzap, Andrew J Bastviken, David Olefeldt, David |
author_facet |
Kuhn, McKenzie A Thompson, Lauren M Winder, Johanna C Braga, Lucas PP Tanentzap, Andrew J Bastviken, David Olefeldt, David |
author_sort |
Kuhn, McKenzie A |
title |
Opposing Effects of Climate and Permafrost Thaw on CH 4 and CO 2 Emissions From Northern Lakes |
title_short |
Opposing Effects of Climate and Permafrost Thaw on CH 4 and CO 2 Emissions From Northern Lakes |
title_full |
Opposing Effects of Climate and Permafrost Thaw on CH 4 and CO 2 Emissions From Northern Lakes |
title_fullStr |
Opposing Effects of Climate and Permafrost Thaw on CH 4 and CO 2 Emissions From Northern Lakes |
title_full_unstemmed |
Opposing Effects of Climate and Permafrost Thaw on CH 4 and CO 2 Emissions From Northern Lakes |
title_sort |
opposing effects of climate and permafrost thaw on ch 4 and co 2 emissions from northern lakes |
publisher |
American Geophysical Union (AGU) |
publishDate |
2021 |
url |
https://www.repository.cam.ac.uk/handle/1810/330614 https://doi.org/10.17863/CAM.78058 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
permafrost |
genre_facet |
permafrost |
op_relation |
https://www.repository.cam.ac.uk/handle/1810/330614 doi:10.17863/CAM.78058 |
op_doi |
https://doi.org/10.17863/CAM.78058 |
_version_ |
1789337391876538368 |