Spectral absorption by marine chromophoric dissolved organic matter: Laboratory determination and piecewise regression modeling

Chromophoric dissolved organic matter (CDOM) is an important light-absorbing component of seawater. Yet spectrophotometric determinations of CDOM absorption from existing laboratory methods differ substantially. Since CDOM absorption in the visible usually remains below the detection limit of tradit...

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Autores: Ruiz, María Guillermina, Lutz, Vivian Alicia, Frouin, Robert
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2017
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/55733
Acceso en línea:http://hdl.handle.net/11336/55733
Access Level:acceso abierto
Palabra clave:Chromophoric Dissolved Organic Matter
Filter Types
Piecewise Regression Analysis
South Atlantic
South Pacific
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
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repository_id_str
spelling Spectral absorption by marine chromophoric dissolved organic matter: Laboratory determination and piecewise regression modelingRuiz, María GuillerminaLutz, Vivian AliciaFrouin, RobertChromophoric Dissolved Organic MatterFilter TypesPiecewise Regression AnalysisSouth AtlanticSouth Pacifichttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Chromophoric dissolved organic matter (CDOM) is an important light-absorbing component of seawater. Yet spectrophotometric determinations of CDOM absorption from existing laboratory methods differ substantially. Since CDOM absorption in the visible usually remains below the detection limit of traditional spectrophotometers, its spectral shape has been modeled from the ultra-violet, by applying a single exponential model (SEM) from which a unique parameter, the spectral slope S, is derived. The usefulness of SEM and S is controversial, due to the lack of agreement on the fitting procedures and the poor ability of the SEM to fit equally well all CDOM absorption spectra. In view of this, empirical factors affecting the measurement of CDOM absorption coefficient by spectrophotometry were tested. No differences in CDOM spectra obtained by filtration through 0.2 μm membrane or 0.7 μm GFF filters were found for either high (Case II) or low (Case I) CDOM content situations. Two spectral shape groups were distinguished after applying a multivariate approach to 145 spectra from the South Atlantic, Strait of Magallanes, and South Pacific. The two groups were associated mainly with coastal and oceanic waters. A segmented regression model (SRM) with two free breakpoints better represented the CDOM absorption spectra than a SEM. The SRM fitted both CDOM spectral shape groups with accuracy. This concatenated exponential model is useful for understanding CDOM dynamics and developing improved satellite ocean-color algorithms.Fil: Ruiz, María Guillermina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - CONICET - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Subsede Instituto Nacional de Investigación y Desarrollo; ArgentinaFil: Lutz, Vivian Alicia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - CONICET - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Subsede Instituto Nacional de Investigación y Desarrollo; ArgentinaFil: Frouin, Robert. University of California at San Diego; Estados UnidosElsevier Science2017-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/55733Ruiz, María Guillermina; Lutz, Vivian Alicia; Frouin, Robert; Spectral absorption by marine chromophoric dissolved organic matter: Laboratory determination and piecewise regression modeling; Elsevier Science; Marine Chemistry; 194; 8-2017; 10-210304-4203CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.marchem.2017.03.012info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0304420317301275info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T13:41:08Zoai:ri.conicet.gov.ar:11336/55733instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982024-05-08 13:41:08.591CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Spectral absorption by marine chromophoric dissolved organic matter: Laboratory determination and piecewise regression modeling
title Spectral absorption by marine chromophoric dissolved organic matter: Laboratory determination and piecewise regression modeling
spellingShingle Spectral absorption by marine chromophoric dissolved organic matter: Laboratory determination and piecewise regression modeling
Ruiz, María Guillermina
Chromophoric Dissolved Organic Matter
Filter Types
Piecewise Regression Analysis
South Atlantic
South Pacific
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
title_short Spectral absorption by marine chromophoric dissolved organic matter: Laboratory determination and piecewise regression modeling
title_full Spectral absorption by marine chromophoric dissolved organic matter: Laboratory determination and piecewise regression modeling
title_fullStr Spectral absorption by marine chromophoric dissolved organic matter: Laboratory determination and piecewise regression modeling
title_full_unstemmed Spectral absorption by marine chromophoric dissolved organic matter: Laboratory determination and piecewise regression modeling
title_sort Spectral absorption by marine chromophoric dissolved organic matter: Laboratory determination and piecewise regression modeling
dc.creator.none.fl_str_mv Ruiz, María Guillermina
Lutz, Vivian Alicia
Frouin, Robert
author Ruiz, María Guillermina
author_facet Ruiz, María Guillermina
Lutz, Vivian Alicia
Frouin, Robert
author_role author
author2 Lutz, Vivian Alicia
Frouin, Robert
author2_role author
author
dc.subject.none.fl_str_mv Chromophoric Dissolved Organic Matter
Filter Types
Piecewise Regression Analysis
South Atlantic
South Pacific
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
topic Chromophoric Dissolved Organic Matter
Filter Types
Piecewise Regression Analysis
South Atlantic
South Pacific
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
description Chromophoric dissolved organic matter (CDOM) is an important light-absorbing component of seawater. Yet spectrophotometric determinations of CDOM absorption from existing laboratory methods differ substantially. Since CDOM absorption in the visible usually remains below the detection limit of traditional spectrophotometers, its spectral shape has been modeled from the ultra-violet, by applying a single exponential model (SEM) from which a unique parameter, the spectral slope S, is derived. The usefulness of SEM and S is controversial, due to the lack of agreement on the fitting procedures and the poor ability of the SEM to fit equally well all CDOM absorption spectra. In view of this, empirical factors affecting the measurement of CDOM absorption coefficient by spectrophotometry were tested. No differences in CDOM spectra obtained by filtration through 0.2 μm membrane or 0.7 μm GFF filters were found for either high (Case II) or low (Case I) CDOM content situations. Two spectral shape groups were distinguished after applying a multivariate approach to 145 spectra from the South Atlantic, Strait of Magallanes, and South Pacific. The two groups were associated mainly with coastal and oceanic waters. A segmented regression model (SRM) with two free breakpoints better represented the CDOM absorption spectra than a SEM. The SRM fitted both CDOM spectral shape groups with accuracy. This concatenated exponential model is useful for understanding CDOM dynamics and developing improved satellite ocean-color algorithms.
publishDate 2017
dc.date.none.fl_str_mv 2017-08
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/55733
Ruiz, María Guillermina; Lutz, Vivian Alicia; Frouin, Robert; Spectral absorption by marine chromophoric dissolved organic matter: Laboratory determination and piecewise regression modeling; Elsevier Science; Marine Chemistry; 194; 8-2017; 10-21
0304-4203
CONICET Digital
CONICET
url http://hdl.handle.net/11336/55733
identifier_str_mv Ruiz, María Guillermina; Lutz, Vivian Alicia; Frouin, Robert; Spectral absorption by marine chromophoric dissolved organic matter: Laboratory determination and piecewise regression modeling; Elsevier Science; Marine Chemistry; 194; 8-2017; 10-21
0304-4203
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.marchem.2017.03.012
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0304420317301275
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 15,811543

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