Dissolved Organic Matter (DOM) in the open Mediterranean Sea. I. Basin–wide distribution and drivers of chromophoric DOM

17 pages, 7 figures, 4 tables

Bibliographic Details
Authors: Catalá, Teresa S., Martínez-Pérez, Alba María, Nieto-Cid, Mar, Álvarez-Rodríguez, Marta, Otero, Jaime, Emelianov, Mikhail, Reche, Isabel, Arístegui, Javier, Álvarez-Salgado, Xosé Antón
Format: article
Status:Versión aceptada para publicación
Publication Date:2018
Country:España
Institution:Consejo Superior de Investigaciones Científicas (CSIC)
Repository:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/165615
Online Access:http://hdl.handle.net/10261/165615
Access Level:Open access
Keyword:Dissolved organic carbon
Chromophoric dissolved organic matter
Water masses
Biogeochemistry
Mediterranean Sea
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spelling Dissolved Organic Matter (DOM) in the open Mediterranean Sea. I. Basin–wide distribution and drivers of chromophoric DOMCatalá, Teresa S.Martínez-Pérez, Alba MaríaNieto-Cid, MarÁlvarez-Rodríguez, MartaOtero, JaimeEmelianov, MikhailReche, IsabelArístegui, JavierÁlvarez-Salgado, Xosé AntónDissolved organic carbonChromophoric dissolved organic matterWater massesBiogeochemistryMediterranean Sea17 pages, 7 figures, 4 tablesChromophoric dissolved organic matter (CDOM) in the open Mediterranean Sea (MedSea) is barely documented, remaining the basin–wide patterns in intermediate and deep waters still enigmatic. Here, full–depth distributions of CDOM absorption coefficients and spectral slopes recorded during the HOTMIX 2014 cruise are presented and their respective environmental drivers resolved. General Additive Models (GAMs) in surface waters and Optimum MultiParameter (OMP) water mass analysis in deep waters were applied. In the surface, apparent oxygen utilisation (AOU), a proxy to cumulative net community respiration, explained most of the variability of dissolved organic carbon (DOC) and the absorption coefficient at 254 nm (a254), whereas the absorption coefficient at 325 nm (a325), and the spectral slopes were mostly explained by potential temperature, a proxy to stratification and solar radiation, indicating that both water column stability and photobleaching may drive the variability of the UV–A absorbing CDOM components. In deep waters, the effect of water mass mixing and basin–scale mineralization were discerned from local mineralization processes. Water mass mixing and basin–scale mineralization contributed more substantially to explain the variability of DOC, a254 and a325 (82–91%) than the variability of the spectral slopes (35–64%). Local mineralization processes indicate that DOC and CDOM play a more relevant role in the carbon cycle in the Eastern (EastMed) than in the Western (WestMed) Mediterranean: whereas DOC contributed to 66 ± 10% of the oxygen demand in the EastMed, it represented only 24 ± 4% in the WestMed. Independently of basins and layers, a254 revealed as an excellent proxy to the concentration of DOC in the MedSea. Also, the unexpected inverse relationship of a325 with AOU indicates that the consumption of the UV–A absorbing CDOM fraction prevails over their productionThis work was funded by the project HOTMIX (grant number CTM2011–30010–C02–MAR) co–financed with FEDER funds. T.S.C. was supported by a predoctoral fellowship from the Ministry of Education, Culture y Sports (Ref. AP2009–2138), the project FOMEM (Spanish Research Council, CSIC–PIE No. 201030E130) and a postdoctoral contract jointly financed by the project CGL2014–52362R of the Spanish Ministry of Economy and Competitiveness and FEDER funds and the University of Granada. A.M.M. –P. was funded by a predoctoral fellowship from the Spanish Ministry of Economy and Competitiveness (Ref. BES–2012–056175) and the project MODMED (Spanish Research Council, CSIC–PIE No. 201730E020). M.N. –C. was supported by the project FERMIO (MINECO, CTM2014–57334–JIN) co–financed with FEDER fundsPeer reviewedElsevierConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201820182018info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/165615reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://doi.org/10.1016/j.pocean.2018.05.002Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1656152026-05-22T06:33:51Z
dc.title.none.fl_str_mv Dissolved Organic Matter (DOM) in the open Mediterranean Sea. I. Basin–wide distribution and drivers of chromophoric DOM
title Dissolved Organic Matter (DOM) in the open Mediterranean Sea. I. Basin–wide distribution and drivers of chromophoric DOM
spellingShingle Dissolved Organic Matter (DOM) in the open Mediterranean Sea. I. Basin–wide distribution and drivers of chromophoric DOM
Catalá, Teresa S.
Dissolved organic carbon
Chromophoric dissolved organic matter
Water masses
Biogeochemistry
Mediterranean Sea
title_short Dissolved Organic Matter (DOM) in the open Mediterranean Sea. I. Basin–wide distribution and drivers of chromophoric DOM
title_full Dissolved Organic Matter (DOM) in the open Mediterranean Sea. I. Basin–wide distribution and drivers of chromophoric DOM
title_fullStr Dissolved Organic Matter (DOM) in the open Mediterranean Sea. I. Basin–wide distribution and drivers of chromophoric DOM
title_full_unstemmed Dissolved Organic Matter (DOM) in the open Mediterranean Sea. I. Basin–wide distribution and drivers of chromophoric DOM
title_sort Dissolved Organic Matter (DOM) in the open Mediterranean Sea. I. Basin–wide distribution and drivers of chromophoric DOM
dc.creator.none.fl_str_mv Catalá, Teresa S.
Martínez-Pérez, Alba María
Nieto-Cid, Mar
Álvarez-Rodríguez, Marta
Otero, Jaime
Emelianov, Mikhail
Reche, Isabel
Arístegui, Javier
Álvarez-Salgado, Xosé Antón
author Catalá, Teresa S.
author_facet Catalá, Teresa S.
Martínez-Pérez, Alba María
Nieto-Cid, Mar
Álvarez-Rodríguez, Marta
Otero, Jaime
Emelianov, Mikhail
Reche, Isabel
Arístegui, Javier
Álvarez-Salgado, Xosé Antón
author_role author
author2 Martínez-Pérez, Alba María
Nieto-Cid, Mar
Álvarez-Rodríguez, Marta
Otero, Jaime
Emelianov, Mikhail
Reche, Isabel
Arístegui, Javier
Álvarez-Salgado, Xosé Antón
author2_role author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Dissolved organic carbon
Chromophoric dissolved organic matter
Water masses
Biogeochemistry
Mediterranean Sea
topic Dissolved organic carbon
Chromophoric dissolved organic matter
Water masses
Biogeochemistry
Mediterranean Sea
description 17 pages, 7 figures, 4 tables
publishDate 2018
dc.date.none.fl_str_mv 2018
2018
2018
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/165615
url http://hdl.handle.net/10261/165615
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.1016/j.pocean.2018.05.002
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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