Mercury and methylmercury in the Atlantic sector of the Southern Ocean

11 páginas, 3 tablas, 7 figuras

Detalles Bibliográficos
Autores: Canário, João, Santos-Echeandía, Juan, Padeiro, Ana, Amaro, Eduardo, Strass, Volker, Klaas, Christine, Hoppema, Mario, Ossebaar, Sharyn, Koch, Boris P., Laglera, Luis M.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2017
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/148868
Acceso en línea:http://hdl.handle.net/10261/148868
Access Level:acceso abierto
Palabra clave:Mercury
Methylmercury
Atlantic sector
Southern Ocean
Eddy–Pump cruise
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spelling Mercury and methylmercury in the Atlantic sector of the Southern OceanCanário, JoãoSantos-Echeandía, JuanPadeiro, AnaAmaro, EduardoStrass, VolkerKlaas, ChristineHoppema, MarioOssebaar, SharynKoch, Boris P.Laglera, Luis M.MercuryMethylmercuryAtlantic sectorSouthern OceanEddy–Pump cruise11 páginas, 3 tablas, 7 figurasOceans constitute one of the most important reservoirs for mercury. In order to provide a first insight into the concentrations of Hg species in the Atlantic sector of the Southern Ocean a sampling campaign was carried out south of the Polar Front. Water samples taken at discrete depths from the surface down to 300 m at six stations were analysed for total Hg (HgT), methylmercury (MeHg) and other interpretative parameters such as salinity, temperature, dissolved and particulate organic carbon, dissolved oxygen, chlorophyll and inorganic nutrients. Results showed a high spatial variability in the concentrations of HgT and MeHg. HgT (0.93±0.69 ng L−1) and MeHg (0.26±0.12 ng L−1) levels were similar or higher than those reported in previous works in high latitude studies. The highest values were found at a location (−53°, 10°E) south of the South Polar Front, an area of strong gradients caused by the mixing of different water masses. Vertical profiles showed a great variability even for those stations sampled at the same location or an area dominated by the same oceanographic features. A decrease of HgT and a consequent increase in MeHg with depth was observed in some sites, suggesting the occurrence of Hg-methylation process, while at other stations, a concurrent decrease or increase of both mercury species was observed. In spite of these differences, an overall positive correlation between HgT and MeHg was observed. Differences between vertical profiles of Hg species were attributed to favourable environmental conditions for Hg methylation. The highest proportion of MeHg (% of HgT) was observed in sites with low dissolved oxygen or highest estimated remineralization rates. The results obtained in this study show that the Hg distribution and speciation in the Atlantic sector of the SO is comparable (or in some sites higher) to the ones published for the other open ocean regions. However, the concentrations of MeHg in this area are more dependent on the environmental conditions than on the total concentration of Hg present in the waterJC, AP and EA acknowledge Fundação para a Ciência e Tecnologia for project UID/QUI/00100/2013 and for the InvFCT2013 grant. LML and JSE were funded by the MINECO of Spain (Grant CGL2010-11846-E) and the Government of the Balearic Islands (AAEE083/09, co-funded by FEDER)Peer reviewedElsevierConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201720172017info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/148868reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://doi.org/10.1016/j.dsr2.2016.07.012Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1488682026-05-22T06:33:51Z
dc.title.none.fl_str_mv Mercury and methylmercury in the Atlantic sector of the Southern Ocean
title Mercury and methylmercury in the Atlantic sector of the Southern Ocean
spellingShingle Mercury and methylmercury in the Atlantic sector of the Southern Ocean
Canário, João
Mercury
Methylmercury
Atlantic sector
Southern Ocean
Eddy–Pump cruise
title_short Mercury and methylmercury in the Atlantic sector of the Southern Ocean
title_full Mercury and methylmercury in the Atlantic sector of the Southern Ocean
title_fullStr Mercury and methylmercury in the Atlantic sector of the Southern Ocean
title_full_unstemmed Mercury and methylmercury in the Atlantic sector of the Southern Ocean
title_sort Mercury and methylmercury in the Atlantic sector of the Southern Ocean
dc.creator.none.fl_str_mv Canário, João
Santos-Echeandía, Juan
Padeiro, Ana
Amaro, Eduardo
Strass, Volker
Klaas, Christine
Hoppema, Mario
Ossebaar, Sharyn
Koch, Boris P.
Laglera, Luis M.
author Canário, João
author_facet Canário, João
Santos-Echeandía, Juan
Padeiro, Ana
Amaro, Eduardo
Strass, Volker
Klaas, Christine
Hoppema, Mario
Ossebaar, Sharyn
Koch, Boris P.
Laglera, Luis M.
author_role author
author2 Santos-Echeandía, Juan
Padeiro, Ana
Amaro, Eduardo
Strass, Volker
Klaas, Christine
Hoppema, Mario
Ossebaar, Sharyn
Koch, Boris P.
Laglera, Luis M.
author2_role author
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 Mercury
Methylmercury
Atlantic sector
Southern Ocean
Eddy–Pump cruise
topic Mercury
Methylmercury
Atlantic sector
Southern Ocean
Eddy–Pump cruise
description 11 páginas, 3 tablas, 7 figuras
publishDate 2017
dc.date.none.fl_str_mv 2017
2017
2017
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/10261/148868
url http://hdl.handle.net/10261/148868
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://doi.org/10.1016/j.dsr2.2016.07.012
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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