Drivers and variability of CO2:O2 saturation along a gradient from boreal to Arctic lakes
Abstract Lakes are significant players for the global climate since they sequester terrestrially derived dissolved organic carbon (DOC), and emit greenhouse gases like CO 2 to the atmosphere. However, the differences in environmental drivers of CO 2 concentrations are not well constrained along lati...
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ftoslouniv:oai:www.duo.uio.no:10852/99082 2023-05-15T14:26:53+02:00 Drivers and variability of CO2:O2 saturation along a gradient from boreal to Arctic lakes AKAkanAkanDrivers and variability of CO2:O2 saturation along a gradient from boreal to Arctic lakes Allesson, Lina Valiente, Nicolas Dörsch, Peter Andersen, Tom Eiler, Alexander Hessen, Dag Olav 2022-11-24T13:14:08Z http://hdl.handle.net/10852/99082 https://doi.org/10.1038/s41598-022-23705-9 EN eng Nature Portfolio Allesson, Lina Valiente, Nicolas Dörsch, Peter Andersen, Tom Eiler, Alexander Hessen, Dag Olav . Drivers and variability of CO2:O2 saturation along a gradient from boreal to Arctic lakes. Scientific Reports. 2022, 12 http://hdl.handle.net/10852/99082 2080090 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Scientific Reports&rft.volume=12&rft.spage=&rft.date=2022 Scientific Reports 12 1 10 https://doi.org/10.1038/s41598-022-23705-9 Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ CC-BY 2045-2322 Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2022 ftoslouniv https://doi.org/10.1038/s41598-022-23705-9 2023-01-25T23:36:27Z Abstract Lakes are significant players for the global climate since they sequester terrestrially derived dissolved organic carbon (DOC), and emit greenhouse gases like CO 2 to the atmosphere. However, the differences in environmental drivers of CO 2 concentrations are not well constrained along latitudinal and thus climate gradients. Our aim here is to provide a better understanding of net heterotrophy and gas balance at the catchment scale in a set of boreal, sub-Arctic and high-Arctic lakes. We assessed water chemistry and concentrations of dissolved O 2 and CO 2 , as well as the CO 2 :O 2 ratio in three groups of lakes separated by steps of approximately 10 degrees latitude in South-Eastern Norway (near 60° N), sub-Arctic lakes in the northernmost part of the Norwegian mainland (near 70° N) and high-Arctic lakes on Svalbard (near 80° N). Across all regions, CO 2 saturation levels varied more (6–1374%) than O 2 saturation levels (85–148%) and hence CO 2 saturation governed the CO 2 :O 2 ratio. The boreal lakes were generally undersaturated with O 2 , while the sub-Arctic and high-Arctic lakes ranged from O 2 saturated to oversaturated. Regardless of location, the majority of the lakes were CO 2 supersaturated. In the boreal lakes the CO 2 :O 2 ratio was mainly related to DOC concentration, in contrast to the sub-Arctic and high-Arctic localities, where conductivity was the major statistical determinant. While the southern part is dominated by granitic and metamorphic bedrock, the sub-Arctic sites are scattered across a range of granitic to sedimentary bed rocks, and the majority of the high-Arctic lakes are situated on limestone, resulting in contrasting lake alkalinities between the regions. DOC dependency of the CO 2 :O 2 ratio in the boreal region together with low alkalinity suggests that in-lake heterotrophic respiration was a major source of lake CO 2 . Contrastingly, the conductivity dependency indicates that CO 2 saturation in the sub-Arctic and high-Arctic lakes was to a large part explained by DIC ... Article in Journal/Newspaper Arctic Arctic Svalbard Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Arctic Norway Svalbard Scientific Reports 12 1 |
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Open Polar |
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Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
op_collection_id |
ftoslouniv |
language |
English |
description |
Abstract Lakes are significant players for the global climate since they sequester terrestrially derived dissolved organic carbon (DOC), and emit greenhouse gases like CO 2 to the atmosphere. However, the differences in environmental drivers of CO 2 concentrations are not well constrained along latitudinal and thus climate gradients. Our aim here is to provide a better understanding of net heterotrophy and gas balance at the catchment scale in a set of boreal, sub-Arctic and high-Arctic lakes. We assessed water chemistry and concentrations of dissolved O 2 and CO 2 , as well as the CO 2 :O 2 ratio in three groups of lakes separated by steps of approximately 10 degrees latitude in South-Eastern Norway (near 60° N), sub-Arctic lakes in the northernmost part of the Norwegian mainland (near 70° N) and high-Arctic lakes on Svalbard (near 80° N). Across all regions, CO 2 saturation levels varied more (6–1374%) than O 2 saturation levels (85–148%) and hence CO 2 saturation governed the CO 2 :O 2 ratio. The boreal lakes were generally undersaturated with O 2 , while the sub-Arctic and high-Arctic lakes ranged from O 2 saturated to oversaturated. Regardless of location, the majority of the lakes were CO 2 supersaturated. In the boreal lakes the CO 2 :O 2 ratio was mainly related to DOC concentration, in contrast to the sub-Arctic and high-Arctic localities, where conductivity was the major statistical determinant. While the southern part is dominated by granitic and metamorphic bedrock, the sub-Arctic sites are scattered across a range of granitic to sedimentary bed rocks, and the majority of the high-Arctic lakes are situated on limestone, resulting in contrasting lake alkalinities between the regions. DOC dependency of the CO 2 :O 2 ratio in the boreal region together with low alkalinity suggests that in-lake heterotrophic respiration was a major source of lake CO 2 . Contrastingly, the conductivity dependency indicates that CO 2 saturation in the sub-Arctic and high-Arctic lakes was to a large part explained by DIC ... |
format |
Article in Journal/Newspaper |
author |
Allesson, Lina Valiente, Nicolas Dörsch, Peter Andersen, Tom Eiler, Alexander Hessen, Dag Olav |
spellingShingle |
Allesson, Lina Valiente, Nicolas Dörsch, Peter Andersen, Tom Eiler, Alexander Hessen, Dag Olav Drivers and variability of CO2:O2 saturation along a gradient from boreal to Arctic lakes |
author_facet |
Allesson, Lina Valiente, Nicolas Dörsch, Peter Andersen, Tom Eiler, Alexander Hessen, Dag Olav |
author_sort |
Allesson, Lina |
title |
Drivers and variability of CO2:O2 saturation along a gradient from boreal to Arctic lakes |
title_short |
Drivers and variability of CO2:O2 saturation along a gradient from boreal to Arctic lakes |
title_full |
Drivers and variability of CO2:O2 saturation along a gradient from boreal to Arctic lakes |
title_fullStr |
Drivers and variability of CO2:O2 saturation along a gradient from boreal to Arctic lakes |
title_full_unstemmed |
Drivers and variability of CO2:O2 saturation along a gradient from boreal to Arctic lakes |
title_sort |
drivers and variability of co2:o2 saturation along a gradient from boreal to arctic lakes |
publisher |
Nature Portfolio |
publishDate |
2022 |
url |
http://hdl.handle.net/10852/99082 https://doi.org/10.1038/s41598-022-23705-9 |
geographic |
Arctic Norway Svalbard |
geographic_facet |
Arctic Norway Svalbard |
genre |
Arctic Arctic Svalbard |
genre_facet |
Arctic Arctic Svalbard |
op_source |
2045-2322 |
op_relation |
Allesson, Lina Valiente, Nicolas Dörsch, Peter Andersen, Tom Eiler, Alexander Hessen, Dag Olav . Drivers and variability of CO2:O2 saturation along a gradient from boreal to Arctic lakes. Scientific Reports. 2022, 12 http://hdl.handle.net/10852/99082 2080090 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Scientific Reports&rft.volume=12&rft.spage=&rft.date=2022 Scientific Reports 12 1 10 https://doi.org/10.1038/s41598-022-23705-9 |
op_rights |
Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41598-022-23705-9 |
container_title |
Scientific Reports |
container_volume |
12 |
container_issue |
1 |
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1766300344884658176 |