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dc.contributor.authorPeacock, M
dc.contributor.authorDavidson, SJ
dc.contributor.authorKothawala, DN
dc.contributor.authorSegersten, J
dc.contributor.authorFutter, MN
dc.date.accessioned2023-11-27T18:10:51Z
dc.date.available2023-11-27T18:10:51Z
dc.date.issued2023-08
dc.identifier.issn2169-8953
dc.identifier.issn2169-8961
dc.identifier.otherARTN e2023JG007668
dc.identifier.urihttps://pearl.plymouth.ac.uk/handle/10026.1/21714
dc.description.abstract

Lakes process large volumes of organic carbon (OC), are important sources of methane (CH4), and contribute to climatic warming. However, there is a lack of data from large lakes >500 km2, which creates uncertainty in global budgets. In this data article, we present dissolved CH4, OC bioreactivity measurements, water chemistry, and algal biovolumes at 11 stations across Lake Mälaren, the third largest (1,074 km2) Swedish lake. Total phosphorus concentrations show that during the study period the lake was classed as mesotrophic/eutrophic. Overall mean CH4 concentration from all stations, sampled five times to cover seasonal variation, was 2.51 μg l−1 (0.98–5.39 μg l−1). There was no significant seasonal variation although ranges were greatest during summer. Concentrations of CH4 were greatest in shallow waters close to anthropogenic nutrient sources, whilst deeper, central basins had lower concentrations. Methane correlated positively with measures of lake productivity (chlorophyll a, total phosphorus), and negatively to water depth and oxygen concentration, with oxygen emerging as the sole significant driver in a linear mixed effects model. We collated data from other lakes >500 km2 (n = 21) and found a significant negative relationship between surface area and average CH4 concentration. Large lakes remain an understudied contributor to the global CH4 cycle and future research efforts should aim to quantify the spatial and temporal variation in their diffusive and ebullitive emissions, and associated drivers.

dc.languageen
dc.publisherAmerican Geophysical Union (AGU)
dc.subjectphosphorus
dc.subjectmethane
dc.subjectEurope
dc.subjectclimate change
dc.subjecteutrophication
dc.subjectgreenhouse gas
dc.titleSpatial and Seasonal Variations in Dissolved Methane Across a Large Lake
dc.typejournal-article
dc.typeArticle
dc.typeData Paper
plymouth.author-urlhttps://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:001050246400001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=11bb513d99f797142bcfeffcc58ea008
plymouth.issue8
plymouth.volume128
plymouth.publisher-urlhttp://dx.doi.org/10.1029/2023jg007668
plymouth.publication-statusPublished
plymouth.journalJournal of Geophysical Research: Biogeosciences
dc.identifier.doi10.1029/2023jg007668
plymouth.organisational-group|Plymouth
plymouth.organisational-group|Plymouth|Faculty of Science and Engineering
plymouth.organisational-group|Plymouth|Faculty of Science and Engineering|School of Geography, Earth and Environmental Sciences
plymouth.organisational-group|Plymouth|REF 2021 Researchers by UoA
plymouth.organisational-group|Plymouth|Users by role
plymouth.organisational-group|Plymouth|Users by role|Academics
plymouth.organisational-group|Plymouth|REF 2021 Researchers by UoA|UoA14 Geography and Environmental Studies
plymouth.organisational-group|Plymouth|REF 2028 Researchers by UoA
plymouth.organisational-group|Plymouth|REF 2028 Researchers by UoA|UoA14 Geography and Environmental Studies
dcterms.dateAccepted2023-08-04
dc.date.updated2023-11-27T18:10:38Z
dc.rights.embargodate2023-12-6
dc.identifier.eissn2169-8961
dc.rights.embargoperiod
rioxxterms.versionofrecord10.1029/2023jg007668


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