Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/25237
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dc.contributor.authorAullo-Maestro, Maria Encinaen_UK
dc.contributor.authorHunter, Peteren_UK
dc.contributor.authorSpyrakos, Evangelosen_UK
dc.contributor.authorMercatoris, Pierreen_UK
dc.contributor.authorKovacs, Attila Wen_UK
dc.contributor.authorHorvath, Hajnalkaen_UK
dc.contributor.authorPreston, Tomen_UK
dc.contributor.authorPresing, Matyasen_UK
dc.contributor.authorTorres-Palenzuela, Jesus Men_UK
dc.contributor.authorTyler, Andrewen_UK
dc.date.accessioned2017-03-30T23:50:10Z-
dc.date.available2017-03-30T23:50:10Z-
dc.date.issued2016-08-12en_UK
dc.identifier.urihttp://hdl.handle.net/1893/25237-
dc.description.abstractThe development and validation of remote sensing-based approaches for the retrieval of CDOM concentrations requires a comprehensive understanding of the sources and magnitude of variability in the optical properties of dissolved material within lakes. In this study, spatial and seasonal variability in concentration and composition of CDOM and the origin of its variation was studied in Lake Balaton (Hungary), a large temperate shallow lake in central Europe. In addition, we investigated the effect of photobleaching on the optical properties of CDOM through in-lake incubation experiments. There was marked variability throughout the year in CDOM absorption in Lake Balaton (aCDOM (440) = 0.06 - 9.01 m-1). The highest values were consistently observed at the mouth of the main inflow (River Zala), which drains humic-rich material from the adjoining Kis-Balaton wetland, but CDOM absorption decreased rapidly towards the east where it was consistently lower and less variable than in the westernmost lake basins. The spectral slope parameter for the interval of 350–500 nm (SCDOM(350–500)) was more variable with increasing distance from the inflow (observed range 0.0161-0.0181 nm-1 for the mouth of the main inflow and 0.0158-0.0300 nm-1 for waters closer to the outflow). However, spatial variation in SCDOM was more constant exhibiting a negative correlation with aCDOM(440). DOC was strongly positively correlated with aCDOM(440) and followed a similar seasonal trend but it demonstrated more variability than either aCDOM or SCDOM with distance through the system. Photobleaching resulting from 7 days exposure to natural solar UV radiation resulted in a marked decrease in allochthonous CDOM absorption (7.04 to 3.36 m-1 , 42% decrease) and an even greater decrease in the absorption of autochthonous CDOM (1.34 to 0.312 m-1 , 77% decrease). Photodegradation also resulted in an increase in the spectral slope coefficient of dissolved material. Terrestrial subsidies of dissolved organic matter are known to exert a profound influence over the biogeochemistry and metabolism of lakes. The results from this study show that localized inputs of dissolved matter from wetlands can exert a strong influence over the spatial and seasonal dynamics of CDOM in lakes.en_UK
dc.language.isoenen_UK
dc.publisherEuropean Geosciences Unionen_UK
dc.relationAullo-Maestro ME, Hunter P, Spyrakos E, Mercatoris P, Kovacs AW, Horvath H, Preston T, Presing M, Torres-Palenzuela JM & Tyler A (2016) Spatio-seasonal variability of chromophoric dissolved organic matter absorption and responses to photobleaching in a large shallow temperate lake. Biogeosciences. https://doi.org/10.5194/bg-2016-329en_UK
dc.rights© Author(s) 2017. This work is distributed under the Creative Commons Attribution 3.0 License.en_UK
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/en_UK
dc.subjectChromophoric dissolved organic matter (CDOM)en_UK
dc.subjectPhotobleachingen_UK
dc.subjectBio-optical propertiesen_UK
dc.subjectSpectral absorptionen_UK
dc.subjectLake Balatonen_UK
dc.titleSpatio-seasonal variability of chromophoric dissolved organic matter absorption and responses to photobleaching in a large shallow temperate lakeen_UK
dc.typeJournal Articleen_UK
dc.identifier.doi10.5194/bg-2016-329en_UK
dc.citation.jtitleBiogeosciencesen_UK
dc.citation.issn1726-4189en_UK
dc.citation.issn1726-4170en_UK
dc.citation.publicationstatusPublisheden_UK
dc.citation.peerreviewedUnrefereeden_UK
dc.type.statusAM - Accepted Manuscripten_UK
dc.citation.date12/08/2016en_UK
dc.description.notesOutput Type: Discussion Paperen_UK
dc.contributor.affiliationBiological and Environmental Sciencesen_UK
dc.contributor.affiliationBiological and Environmental Sciencesen_UK
dc.contributor.affiliationBiological and Environmental Sciencesen_UK
dc.contributor.affiliationUniversity of Stirlingen_UK
dc.contributor.affiliationHungarian Academy of Sciencesen_UK
dc.contributor.affiliationHungarian Academy of Sciencesen_UK
dc.contributor.affiliationScottish Universities Environmental Research Centreen_UK
dc.contributor.affiliationHungarian Academy of Sciencesen_UK
dc.contributor.affiliationUniversity of Vigoen_UK
dc.contributor.affiliationBiological and Environmental Sciencesen_UK
dc.identifier.wtid532112en_UK
dc.contributor.orcid0000-0001-7269-795Xen_UK
dc.contributor.orcid0000-0003-0604-5827en_UK
dc.date.accepted2016-08-12en_UK
dcterms.dateAccepted2016-08-12en_UK
dc.date.filedepositdate2017-03-30en_UK
rioxxterms.apcnot chargeden_UK
rioxxterms.typeJournal Article/Reviewen_UK
rioxxterms.versionAMen_UK
local.rioxx.authorAullo-Maestro, Maria Encina|en_UK
local.rioxx.authorHunter, Peter|0000-0001-7269-795Xen_UK
local.rioxx.authorSpyrakos, Evangelos|en_UK
local.rioxx.authorMercatoris, Pierre|en_UK
local.rioxx.authorKovacs, Attila W|en_UK
local.rioxx.authorHorvath, Hajnalka|en_UK
local.rioxx.authorPreston, Tom|en_UK
local.rioxx.authorPresing, Matyas|en_UK
local.rioxx.authorTorres-Palenzuela, Jesus M|en_UK
local.rioxx.authorTyler, Andrew|0000-0003-0604-5827en_UK
local.rioxx.projectInternal Project|University of Stirling|https://isni.org/isni/0000000122484331en_UK
local.rioxx.freetoreaddate2017-03-30en_UK
local.rioxx.licencehttp://creativecommons.org/licenses/by/3.0/|2017-03-30|en_UK
local.rioxx.filenamebg-2016-329.pdfen_UK
local.rioxx.filecount1en_UK
local.rioxx.source1726-4170en_UK
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