The influence of sediment sources on radium-derived estimates of Submarine Groundwater Discharge

The influence of sediments on the determination of SGD by using Ra isotopes was investigated in the Port of Maó (Balearic Islands, NW Mediterranean). This natural harbor was selected because SGD occurs all along its southern boundary and it is covered by fine-grained sediments that are frequently re...

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Autores: Rodellas, Valentí|||0000-0002-5896-9987, García Orellana, Jordi|||0000-0002-0543-2641, Masqué Barri, Pere|||0000-0002-1789-320X, Font-Muñoz, Joan S.
Tipo de documento: artigo
Data de publicação:2015
País:España
Recursos:Universitat Autònoma de Barcelona
Repositório:Dipòsit Digital de Documents de la UAB
Idioma:inglês
OAI Identifier:oai:ddd.uab.cat:241175
Acesso em linha:https://ddd.uab.cat/record/241175
https://dx.doi.org/urn:doi:10.1016/j.marchem.2015.02.010
Access Level:Acceso aberto
Palavra-chave:Radium isotopes
Submarine Groundwater Discharge
Sediments
Mediterranean Sea
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spelling The influence of sediment sources on radium-derived estimates of Submarine Groundwater DischargeRodellas, Valentí|||0000-0002-5896-9987García Orellana, Jordi|||0000-0002-0543-2641Masqué Barri, Pere|||0000-0002-1789-320XFont-Muñoz, Joan S.Radium isotopesSubmarine Groundwater DischargeSedimentsMediterranean SeaThe influence of sediments on the determination of SGD by using Ra isotopes was investigated in the Port of Maó (Balearic Islands, NW Mediterranean). This natural harbor was selected because SGD occurs all along its southern boundary and it is covered by fine-grained sediments that are frequently resuspended due to vessel maneuvering. Comprehensive seasonal Ra mass balances were constructed for the waters of the Port of Maó using both short-lived (224Ra) and long-lived (228Ra) Ra isotopes. SGD flows to the Port of Maó obtained by using 228Ra revealed a seasonal pattern, likely dominated by the recharge cycle, with maximum SGD rates during the wet seasons ((180 ± 100) · 103 m3·day- 1 in fall) and minimum flows during summer ((56 ± 35) · 103 m3·day- 1). The results also showed that the Ra flux from bottom sediments, through diffusion and due to releases associated to resuspension events, represented a significant source of Ra to the harbor waters. This sedimentary source accounted for a major fraction of the 224Ra supplied to the system (30-90%, depending on the season), whereas the sediment influence on the 228Ra mass balance was significantly lower (10-40%) due to its slower production rate. These findings suggested that attributing Ra inputs to the water column solely to SGD in systems covered by fine-grained sediments and/or affected by processes that favor Ra exchange across the sediment-water interface might not be accurate, requiring a detailed evaluation of the sediment sources. The inputs from sediments are often difficult to quantify, but using long-lived Ra isotopes to estimate the SGD flow may minimize the effect of a poor characterization of the sediment source. 22015-01-0120152015-01-01Articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/241175https://dx.doi.org/urn:doi:10.1016/j.marchem.2015.02.010reponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengMinisterio de Ciencia e Innovación https://doi.org/10.13039/501100004837 CTM2009-08270Ministerio de Educación, Cultura y Deporte https://doi.org/10.13039/501100003176 AP2008-03044Agència de Gestió d'Ajuts Universitaris i de Recerca https://doi.org/10.13039/501100003030 2014/SGR-1356open accesshttp://purl.org/coar/access_right/c_abf2Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.https://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:ddd.uab.cat:2411752026-06-06T12:50:31Z
dc.title.none.fl_str_mv The influence of sediment sources on radium-derived estimates of Submarine Groundwater Discharge
title The influence of sediment sources on radium-derived estimates of Submarine Groundwater Discharge
spellingShingle The influence of sediment sources on radium-derived estimates of Submarine Groundwater Discharge
Rodellas, Valentí|||0000-0002-5896-9987
Radium isotopes
Submarine Groundwater Discharge
Sediments
Mediterranean Sea
title_short The influence of sediment sources on radium-derived estimates of Submarine Groundwater Discharge
title_full The influence of sediment sources on radium-derived estimates of Submarine Groundwater Discharge
title_fullStr The influence of sediment sources on radium-derived estimates of Submarine Groundwater Discharge
title_full_unstemmed The influence of sediment sources on radium-derived estimates of Submarine Groundwater Discharge
title_sort The influence of sediment sources on radium-derived estimates of Submarine Groundwater Discharge
dc.creator.none.fl_str_mv Rodellas, Valentí|||0000-0002-5896-9987
García Orellana, Jordi|||0000-0002-0543-2641
Masqué Barri, Pere|||0000-0002-1789-320X
Font-Muñoz, Joan S.
author Rodellas, Valentí|||0000-0002-5896-9987
author_facet Rodellas, Valentí|||0000-0002-5896-9987
García Orellana, Jordi|||0000-0002-0543-2641
Masqué Barri, Pere|||0000-0002-1789-320X
Font-Muñoz, Joan S.
author_role author
author2 García Orellana, Jordi|||0000-0002-0543-2641
Masqué Barri, Pere|||0000-0002-1789-320X
Font-Muñoz, Joan S.
author2_role author
author
author
dc.subject.none.fl_str_mv Radium isotopes
Submarine Groundwater Discharge
Sediments
Mediterranean Sea
topic Radium isotopes
Submarine Groundwater Discharge
Sediments
Mediterranean Sea
description The influence of sediments on the determination of SGD by using Ra isotopes was investigated in the Port of Maó (Balearic Islands, NW Mediterranean). This natural harbor was selected because SGD occurs all along its southern boundary and it is covered by fine-grained sediments that are frequently resuspended due to vessel maneuvering. Comprehensive seasonal Ra mass balances were constructed for the waters of the Port of Maó using both short-lived (224Ra) and long-lived (228Ra) Ra isotopes. SGD flows to the Port of Maó obtained by using 228Ra revealed a seasonal pattern, likely dominated by the recharge cycle, with maximum SGD rates during the wet seasons ((180 ± 100) · 103 m3·day- 1 in fall) and minimum flows during summer ((56 ± 35) · 103 m3·day- 1). The results also showed that the Ra flux from bottom sediments, through diffusion and due to releases associated to resuspension events, represented a significant source of Ra to the harbor waters. This sedimentary source accounted for a major fraction of the 224Ra supplied to the system (30-90%, depending on the season), whereas the sediment influence on the 228Ra mass balance was significantly lower (10-40%) due to its slower production rate. These findings suggested that attributing Ra inputs to the water column solely to SGD in systems covered by fine-grained sediments and/or affected by processes that favor Ra exchange across the sediment-water interface might not be accurate, requiring a detailed evaluation of the sediment sources. The inputs from sediments are often difficult to quantify, but using long-lived Ra isotopes to estimate the SGD flow may minimize the effect of a poor characterization of the sediment source.
publishDate 2015
dc.date.none.fl_str_mv 2
2015-01-01
2015
2015-01-01
dc.type.none.fl_str_mv Article
http://purl.org/coar/resource_type/c_6501
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://ddd.uab.cat/record/241175
https://dx.doi.org/urn:doi:10.1016/j.marchem.2015.02.010
url https://ddd.uab.cat/record/241175
https://dx.doi.org/urn:doi:10.1016/j.marchem.2015.02.010
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Ministerio de Ciencia e Innovación https://doi.org/10.13039/501100004837 CTM2009-08270
Ministerio de Educación, Cultura y Deporte https://doi.org/10.13039/501100003176 AP2008-03044
Agència de Gestió d'Ajuts Universitaris i de Recerca https://doi.org/10.13039/501100003030 2014/SGR-1356
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Dipòsit Digital de Documents de la UAB
instname:Universitat Autònoma de Barcelona
instname_str Universitat Autònoma de Barcelona
reponame_str Dipòsit Digital de Documents de la UAB
collection Dipòsit Digital de Documents de la UAB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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