English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/59817
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

DC FieldValueLanguage
dc.contributor.authorOrtega-Retuerta, E.-
dc.contributor.authorReche, Isabel-
dc.contributor.authorPulido-Villena, E.-
dc.contributor.authorAgustí, Susana-
dc.contributor.authorDuarte, Carlos M.-
dc.identifierdoi: 10.1016/j.marchem.2009.11.008-
dc.identifierissn: 0304-4203-
dc.identifier.citationMarine Chemistry 118: 129- 139 (2010)-
dc.description.abstractChromophoric dissolved organic matter (CDOM) plays a key role regulating light attenuation in the ocean. This optically reactive pool of organic matter is driven by several physical and biological processes such as photobleaching, photohumification, and biogeneration, that act as primary sinks and sources of CDOM. In this study, we described the geographical and vertical distribution of CDOM in the Antarctic Peninsula area (Southern Ocean), and assessed its potential driving factors, with special emphasis on CDOM photoreactivity. CDOM values were between the detection limit and 2.17 m- 1 at 325 nm and between the detection limit and 0.76 m- 1 at 443 nm (average a325 = 0.36 ± 0.02 m- 1, average a443 = 0.11 ± 0.01 m- 1), with the highest values inside Deception Island in 2004, and the lowest in the Eastern Bransfield Strait. In Bellingshausen Sea, CDOM was higher below the mixed layer suggesting a significant role of photobleaching. By contrast in the Weddell Sea maximum values were found within the mixed layer. In the Weddell Sea, a positive correlation between CDOM and both chlorophyll a and bacterial production and a negative correlation with salinity suggest a biological source of CDOM likely associated to ice melting. Salinity was also negatively related to the spectral slopes from 275 to 295 nm, considered a good proxy for DOM molecular weight. The experimental results demonstrate the photoreactive nature of CDOM, with half lives from 2.1 to 5.1 days due to photobleaching in the upper layer and duplication times from 4.9 to 15.7 days due to photohumification, that highlight the highly dynamic nature of CDOM in this area. © 2009 Elsevier B.V. All rights reserved.-
dc.description.sponsorshipThis work was funded by the Spanish Ministry of Science and Technology (ICEPOS, REN2002-04165-CO3-02 to CD and DISPAR, CGL2005-00076 to IR).-
dc.titleDistribution and photoreactivity of chromophoric dissolved organic matter in the Antarctic Peninsula (Southern Ocean)-
dc.description.versionPeer Reviewed-
Appears in Collections:(IMEDEA) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
Show simple item record

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.