Seasonal patterns in greenhouse gas emissions from thermokarst lakes in Central Yakutia (Eastern Siberia)
Abstract In the ice‐rich permafrost area of Central Yakutia (Eastern Siberia, Russia), climate warming and other natural and anthropogenic disturbances have caused permafrost degradation and soil subsidence, resulting in the formation of numerous thermokarst (thaw) lakes. These lakes are hotspots of...
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crwiley:10.1002/lno.11665 2024-06-23T07:50:13+00:00 Seasonal patterns in greenhouse gas emissions from thermokarst lakes in Central Yakutia (Eastern Siberia) Hughes‐Allen, Lara Bouchard, Frédéric Laurion, Isabelle Séjourné, Antoine Marlin, Christelle Hatté, Christine Costard, François Fedorov, Alexander Desyatkin, Alexey 2020 http://dx.doi.org/10.1002/lno.11665 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11665 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.11665 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11665 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Limnology and Oceanography volume 66, issue S1 ISSN 0024-3590 1939-5590 journal-article 2020 crwiley https://doi.org/10.1002/lno.11665 2024-06-06T04:22:02Z Abstract In the ice‐rich permafrost area of Central Yakutia (Eastern Siberia, Russia), climate warming and other natural and anthropogenic disturbances have caused permafrost degradation and soil subsidence, resulting in the formation of numerous thermokarst (thaw) lakes. These lakes are hotspots of greenhouse gas emissions, but with substantial spatial and temporal heterogeneity across the Arctic. We measured dissolved CO 2 and CH 4 concentrations in thermokarst lakes of Central Yakutia and their seasonal patterns over a yearly cycle. Lakes formed over the Holocene (alas lakes) are compared to lakes that developed over the last decades. The results show striking differences in dissolved greenhouse gases (up to two orders of magnitude) between lake types and seasons. Shallow lakes located in hydrologically closed alas depressions acted as CO 2 sinks and strong sources of diffusive CH 4 during some seasons (ebullition was not assessed). Recent thermokarst lakes were moderate to extremely high sources of diffusive CO 2 and CH 4 , with considerable accumulation of greenhouse gas under the ice cover (winter) or in the deepest water layers (summer), highlighting the need to include spring and autumn as critical periods for integrated assessments. The water column was stratified in winter (all lake types) and especially in summer (recent thermokarst lakes), generating anoxia in bottom waters and favoring CH 4 production and storage, particularly in the most organic‐rich lakes. The diffusive fluxes measured from thermokarst lakes of this typical taiga alas landscape of Central Yakutia are among the highest presented across Arctic and subarctic regions. Article in Journal/Newspaper Arctic Ice permafrost Subarctic taiga Thermokarst Yakutia Siberia Wiley Online Library Arctic Limnology and Oceanography 66 S1 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract In the ice‐rich permafrost area of Central Yakutia (Eastern Siberia, Russia), climate warming and other natural and anthropogenic disturbances have caused permafrost degradation and soil subsidence, resulting in the formation of numerous thermokarst (thaw) lakes. These lakes are hotspots of greenhouse gas emissions, but with substantial spatial and temporal heterogeneity across the Arctic. We measured dissolved CO 2 and CH 4 concentrations in thermokarst lakes of Central Yakutia and their seasonal patterns over a yearly cycle. Lakes formed over the Holocene (alas lakes) are compared to lakes that developed over the last decades. The results show striking differences in dissolved greenhouse gases (up to two orders of magnitude) between lake types and seasons. Shallow lakes located in hydrologically closed alas depressions acted as CO 2 sinks and strong sources of diffusive CH 4 during some seasons (ebullition was not assessed). Recent thermokarst lakes were moderate to extremely high sources of diffusive CO 2 and CH 4 , with considerable accumulation of greenhouse gas under the ice cover (winter) or in the deepest water layers (summer), highlighting the need to include spring and autumn as critical periods for integrated assessments. The water column was stratified in winter (all lake types) and especially in summer (recent thermokarst lakes), generating anoxia in bottom waters and favoring CH 4 production and storage, particularly in the most organic‐rich lakes. The diffusive fluxes measured from thermokarst lakes of this typical taiga alas landscape of Central Yakutia are among the highest presented across Arctic and subarctic regions. |
format |
Article in Journal/Newspaper |
author |
Hughes‐Allen, Lara Bouchard, Frédéric Laurion, Isabelle Séjourné, Antoine Marlin, Christelle Hatté, Christine Costard, François Fedorov, Alexander Desyatkin, Alexey |
spellingShingle |
Hughes‐Allen, Lara Bouchard, Frédéric Laurion, Isabelle Séjourné, Antoine Marlin, Christelle Hatté, Christine Costard, François Fedorov, Alexander Desyatkin, Alexey Seasonal patterns in greenhouse gas emissions from thermokarst lakes in Central Yakutia (Eastern Siberia) |
author_facet |
Hughes‐Allen, Lara Bouchard, Frédéric Laurion, Isabelle Séjourné, Antoine Marlin, Christelle Hatté, Christine Costard, François Fedorov, Alexander Desyatkin, Alexey |
author_sort |
Hughes‐Allen, Lara |
title |
Seasonal patterns in greenhouse gas emissions from thermokarst lakes in Central Yakutia (Eastern Siberia) |
title_short |
Seasonal patterns in greenhouse gas emissions from thermokarst lakes in Central Yakutia (Eastern Siberia) |
title_full |
Seasonal patterns in greenhouse gas emissions from thermokarst lakes in Central Yakutia (Eastern Siberia) |
title_fullStr |
Seasonal patterns in greenhouse gas emissions from thermokarst lakes in Central Yakutia (Eastern Siberia) |
title_full_unstemmed |
Seasonal patterns in greenhouse gas emissions from thermokarst lakes in Central Yakutia (Eastern Siberia) |
title_sort |
seasonal patterns in greenhouse gas emissions from thermokarst lakes in central yakutia (eastern siberia) |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1002/lno.11665 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11665 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.11665 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11665 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Ice permafrost Subarctic taiga Thermokarst Yakutia Siberia |
genre_facet |
Arctic Ice permafrost Subarctic taiga Thermokarst Yakutia Siberia |
op_source |
Limnology and Oceanography volume 66, issue S1 ISSN 0024-3590 1939-5590 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/lno.11665 |
container_title |
Limnology and Oceanography |
container_volume |
66 |
container_issue |
S1 |
_version_ |
1802641098772840448 |