dc.date.accessioned | 2023-01-22T16:12:58Z | |
dc.date.available | 2023-01-22T16:12:58Z | |
dc.date.created | 2022-11-24T13:14:08Z | |
dc.date.issued | 2022 | |
dc.identifier.citation | 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 | |
dc.identifier.uri | http://hdl.handle.net/10852/99082 | |
dc.description.abstract | 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 input from catchment respiration and carbonate weathering. | |
dc.language | EN | |
dc.publisher | Nature Portfolio | |
dc.rights | Attribution 4.0 International | |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
dc.title | Drivers and variability of CO2:O2 saturation along a gradient from boreal to Arctic lakes | |
dc.title.alternative | AKAkanAkanDrivers and variability of CO2:O2 saturation along a gradient from boreal to Arctic lakes | |
dc.type | Journal article | |
dc.creator.author | Allesson, Lina | |
dc.creator.author | Valiente, Nicolas | |
dc.creator.author | Dörsch, Peter | |
dc.creator.author | Andersen, Tom | |
dc.creator.author | Eiler, Alexander | |
dc.creator.author | Hessen, Dag Olav | |
cristin.unitcode | 185,15,29,70 | |
cristin.unitname | Seksjon for akvatisk biologi og toksikologi | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |
dc.identifier.cristin | 2080090 | |
dc.identifier.bibliographiccitation | 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 | |
dc.identifier.jtitle | Scientific Reports | |
dc.identifier.volume | 12 | |
dc.identifier.issue | 1 | |
dc.identifier.pagecount | 10 | |
dc.identifier.doi | https://doi.org/10.1038/s41598-022-23705-9 | |
dc.type.document | Tidsskriftartikkel | |
dc.type.peerreviewed | Peer reviewed | |
dc.source.issn | 2045-2322 | |
dc.type.version | PublishedVersion | |
cristin.articleid | 18989 | |