English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/51037
Share/Impact:
Statistics
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:

Title

Local remineralization patterns in the mesopelagic zone of the Eastern North Atlantic, off the NW Iberian Peninsula

AuthorsCastro, Carmen G. ; Nieto-Cid, Mar ; Álvarez-Salgado, Xosé Antón ; Pérez, Fiz F.
KeywordsWater masses
Remineralization
Nutrients
Dissolved organic matter
Mesopelagic zone
Northeast Atlantic Ocean
European ocean margin
Issue Date2006
PublisherElsevier
CitationDeep Sea Research - Part I - Oceanographic Research Papers 53(12): 1925-1940 (2006)
AbstractThe short-time-scale variability of the remineralization patterns in the domain of Eastern North Atlantic Central Waters (ENACW) off the NW Iberian Peninsula is studied based on biogeochemical data (oxygen, nutrient salts, total alkalinity, pH, dissolved organic matter and fluorescence of dissolved humic substances) collected weekly between May 2001 and April 2002. The temporal variability of inorganic variables points to an intensification of remineralization during the summer and autumn, with an increase of nutrients, total inorganic carbon and fluorescence and a decrease of oxygen. During the subsequent winter mixing, there is a biogeochemical reset of the system, with lower nutrients, total inorganic carbon and fluorescence and higher oxygen. In contrast to inorganic variables, the levels of dissolved organic matter in the ENACW seem to respond to short-term events probably associated with fast sinking particles, where solubilisation of organic matter prevails over remineralization. Applying a previously published stoichiometric model, we observed a vertical fractionation of organic-matter remineralization. Although there is a preferential remineralization of proteins and P compounds in the entire domain of ENACW, the percentage was higher in the upper ENACW (so27.10 kg/m3) than in the lower; the percentage of N and P compounds in the oxidised organic matter was 480% for the upper ENACW and 63% for the lower. Likewise, the redissolution of calcareous structures contributes about 6% and 13% to the carbon regenerated in the upper and lower layers of ENACW, respectively.
Description16 páginas, 4 tablas, 5 figuras
Publisher version (URL)http://dx.doi.org/10.1016/j.dsr.2006.09.002
URIhttp://hdl.handle.net/10261/51037
DOI10.1016/j.dsr.2006.09.002
ISSN0967-0637
ISMN10.1016/j.dsr.2006.09.002
Appears in Collections:(IIM) Artículos
Files in This Item:
File Description SizeFormat 
Local_remineralization_patterns.pdf587,26 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


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