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dc.contributor.authorXiao, Yihua
dc.contributor.authorRohrlack, Thomas
dc.contributor.authorRiise, Gunnhild
dc.date.accessioned2019-11-06T09:40:44Z
dc.date.available2019-11-06T09:40:44Z
dc.date.issued2020
dc.identifier.citationXiao, Y., Rohrlack, T., & Riise, G. (2020). Unraveling long-term changes in lake color based on optical properties of lake sediment. <i>Science of the Total Environment</i>, <i>699</i>, Article 134388. <a href="https://doi.org/10.1016/j.scitotenv.2019.134388" target="_blank">https://doi.org/10.1016/j.scitotenv.2019.134388</a>
dc.identifier.otherCONVID_32815234
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/66213
dc.description.abstractA number of boreal surface waters have become browner over the last two decades. Recovery from acid rain is regarded as an important driver for this lake color increase, indicating a general browner lake color in preindustrial times. However, the lack of long-term monitoring data makes it challenging to unravel historical changes in lake color. In this study, we estimated long-term development in lake color (1800 to 2015) based on the optical properties of alkaline extractable dissolved organic matter (DOM) from sediment using UV–Vis and fluorescence spectroscopy. We found that the present lake color (2015) was significantly browner (four times higher in absorption coefficient) than for the period from 1800 to 1915 when lake color was at a lower and more stable level. Fluorescence excitation–emission matrices combined with parallel factor analysis (EEM-PARAFAC) indicate that terrestrially derived DOM was the main source of sediment DOM. However, the importance of in-lake source of DOM has significantly increased with time. The long-term trend in DOM burial was not consistent with the anthropogenic sulfur (S) deposition pattern. However, along with the increased sediment DOM, there has been increased precipitation, temperature and forest growth with time, which affect the production and degradation of DOM. Even though S deposition might have delayed the runoff of terrestrial DOM for a certain period, it comes in addition to other color-regulating factors. Thus, there is no single driver for the observed lake browning, but rather an interplay between different drivers varying in strength over time, such as afforestation, changes in areal use, declined S deposition, and increased temperature and precipitation.en
dc.format.mimetypeapplication/pdf
dc.languageeng
dc.language.isoeng
dc.publisherElsevier BV
dc.relation.ispartofseriesScience of the Total Environment
dc.rightsCC BY-NC-ND 4.0
dc.subject.otherlake color
dc.subject.othersediment
dc.subject.otherdissolved organic matter
dc.subject.otherUV–vis spectroscopy
dc.subject.otherEEM-PARAFAC
dc.titleUnraveling long-term changes in lake color based on optical properties of lake sediment
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201911064750
dc.contributor.laitosBio- ja ympäristötieteiden laitosfi
dc.contributor.laitosDepartment of Biological and Environmental Scienceen
dc.contributor.oppiaineYmpäristötiedefi
dc.contributor.oppiaineEnvironmental Scienceen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.description.reviewstatuspeerReviewed
dc.relation.issn0048-9697
dc.relation.volume699
dc.type.versionacceptedVersion
dc.rights.copyright© 2019 The Authors
dc.rights.accesslevelopenAccessfi
dc.relation.grantnumber295709
dc.subject.ysojärvet
dc.subject.ysospektroskopia
dc.subject.ysoorgaaninen aines
dc.subject.ysovedenlaatu
dc.subject.ysovedenväri
dc.subject.ysosedimentit
dc.format.contentfulltext
jyx.subject.urihttp://www.yso.fi/onto/yso/p9374
jyx.subject.urihttp://www.yso.fi/onto/yso/p10176
jyx.subject.urihttp://www.yso.fi/onto/yso/p14873
jyx.subject.urihttp://www.yso.fi/onto/yso/p15738
jyx.subject.urihttp://www.yso.fi/onto/yso/p37924
jyx.subject.urihttp://www.yso.fi/onto/yso/p14605
dc.rights.urlhttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.relation.doi10.1016/j.scitotenv.2019.134388
dc.relation.funderSuomen Akatemiafi
dc.relation.funderAcademy of Finlanden
jyx.fundingprogramTutkijatohtori, SAfi
jyx.fundingprogramPostdoctoral Researcher, AoFen
jyx.fundinginformationThis study was funded by Academy of Finland Grant (No. 295709; Y.X.)and it is also a delivery to the Nordic Centre of Excellence –Biowater.


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