Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12779/5801
DC FieldValueLanguage
dc.contributor.authorBracchini, Len_us
dc.contributor.authorDATTILO A., Men_us
dc.contributor.authorHull, Ven_us
dc.contributor.authorLoiselle, Steven Arthuren_us
dc.contributor.authorNannicini, Len_us
dc.contributor.authorPicchi, MARIA PIAen_us
dc.contributor.authorRicci, Men_us
dc.contributor.authorSantinelli, Cen_us
dc.contributor.authorSeritti, Aen_us
dc.contributor.authorTognazzi, Aen_us
dc.contributor.authorRossi, Claudioen_us
dc.date.accessioned2021-03-30T15:55:14Z-
dc.date.available2021-03-30T15:55:14Z-
dc.date.issued2010-
dc.identifier.issn1474-905Xen_US
dc.identifier.urihttp://hdl.handle.net/20.500.12779/5801-
dc.description36505en_US
dc.description.abstractIn this study, we present results on seasonal and spatial changes in CDOM absorption and fluorescence (fCDOM) in a deep mountain lake (Salto Lake, Italy). A novel approach was used to describe the shape of CDOM absorption between 250–700 nm (distribution of the spectral slope, S(l)) and a new fluorescence ratio is used to distinguish between humic and amino acid-like components. Solar ultraviolet irradiance, dissolved organic carbon (DOC), DOM fluorescence and absorption measurements were analysed and compared to other physicochemical parameters. We show that in the UV-exposed mixed layer: (i) fluorescence by autochthonous amino acid-like CDOM, (ii) values of S(l) across UV-C and UV-B wavebands increased during the summer months, whereas (i) average molar absorption coefficient and (ii) fluorescence by allochthonous humic CDOM decreased. In the unexposed deep layer of the water column (and in the entire water column in winter), humic-like CDOM presented high values of molar absorption coefficients and low values of S(l). UV attenuation coefficients correlated with both chlorophyll a concentrations and CDOM absorption. In agreement with changes in CDOM, minimal values in UV attenuation were found in summer. The S(l) curve was used as a signature of the mixture between photobleached and algal-derived CDOM with respect to the unexposed chromophoric dissolved compounds in this thermal stratified lake. Furthermore, S(l) curves were useful to distinguish between low and high molecular weight CDOM.en_US
dc.language.isoenen_US
dc.relationNoneen_US
dc.relation.ispartofPHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCESen_US
dc.subjectCDOM; Optical propertiesen_US
dc.titleSpatial and seasonal changes in optical properties of autochthonous and allochthonous chromophoric dissolved organic matter in a stratified mountain lakeen_US
dc.typeArticleen_US
dc.identifier.doi10.1039/b9pp00129hen_US
dc.identifier.pmid20221456en_US
dc.identifier.scopus2-s2.0-77949361482en_US
dc.identifier.isiWOS:000275377200004en_US
dc.relation.volume9en_US
dc.relation.issue3en_US
dc.description.firstpage304en_US
dc.description.lastpage314en_US
dc.description.thirdmissionNot applicableen_US
item.cerifentitytypePublications-
item.grantfulltextnone-
item.languageiso639-1en-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.openairetypeArticle-
item.fulltextNo Fulltext-
crisitem.author.orcid0000-0001-7414-0389-
crisitem.author.orcid0000-0001-6032-1015-
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