Local remineralization patterns in the mesopelagic zone of the Eastern North Atlantic, off the NW Iberian Peninsula
Original research article The 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...
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Centro Oceanográfico de A Coruña
2006
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Online Access: | http://hdl.handle.net/10508/14500 https://doi.org/10.1016/j.dsr.2006.09.002 |
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ftieo:oai:repositorio.ieo.es:10508/14500 2023-05-15T17:32:06+02:00 Local remineralization patterns in the mesopelagic zone of the Eastern North Atlantic, off the NW Iberian Peninsula Castro, C.G. Nieto-Cid, M. (Mar) Álvarez-Salgado, X.A. (Xosé Antón) Pérez, F.F. (Fiz F.) May 2001 to April 2002 2006-12 http://hdl.handle.net/10508/14500 https://doi.org/10.1016/j.dsr.2006.09.002 eng eng Centro Oceanográfico de A Coruña https://www.sciencedirect.com/science/article/pii/S0967063706002329 Dinámica Y Biogeoquímica annual en la plataforma GAllega: variación de corta escala http://hdl.handle.net/10508/14500 Deep-Sea Research I, 53. 2006: 1925-1940 doi:10.1016/j.dsr.2006.09.002 Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ openAccess CC-BY-NC-ND Water masses remineralization nutrients Dissolved organic matter Mesopelagic zone Northeast atlantic ocean European ocean margin variability research residence time hydrographic data article 2006 ftieo https://doi.org/10.1016/j.dsr.2006.09.002 2022-07-26T23:49:49Z Original research article The 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 (σ<27.10 kg/m3) than in the lower; the percentage of N and P compounds in the oxidised organic matter was >80% 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. Financial support for this work came from CICYT project MAR99-1039-C02-01; a contract of the Ramón y Cajal programme of the Spanish MCYT and a fellowship from the Spanish MCYT. Versión del editor Article in Journal/Newspaper North Atlantic Northeast Atlantic Instituto Español de Oceanografía: e-IEO Deep Sea Research Part I: Oceanographic Research Papers 53 12 1925 1940 |
institution |
Open Polar |
collection |
Instituto Español de Oceanografía: e-IEO |
op_collection_id |
ftieo |
language |
English |
topic |
Water masses remineralization nutrients Dissolved organic matter Mesopelagic zone Northeast atlantic ocean European ocean margin variability research residence time hydrographic data |
spellingShingle |
Water masses remineralization nutrients Dissolved organic matter Mesopelagic zone Northeast atlantic ocean European ocean margin variability research residence time hydrographic data Castro, C.G. Nieto-Cid, M. (Mar) Álvarez-Salgado, X.A. (Xosé Antón) Pérez, F.F. (Fiz F.) Local remineralization patterns in the mesopelagic zone of the Eastern North Atlantic, off the NW Iberian Peninsula |
topic_facet |
Water masses remineralization nutrients Dissolved organic matter Mesopelagic zone Northeast atlantic ocean European ocean margin variability research residence time hydrographic data |
description |
Original research article The 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 (σ<27.10 kg/m3) than in the lower; the percentage of N and P compounds in the oxidised organic matter was >80% 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. Financial support for this work came from CICYT project MAR99-1039-C02-01; a contract of the Ramón y Cajal programme of the Spanish MCYT and a fellowship from the Spanish MCYT. Versión del editor |
format |
Article in Journal/Newspaper |
author |
Castro, C.G. Nieto-Cid, M. (Mar) Álvarez-Salgado, X.A. (Xosé Antón) Pérez, F.F. (Fiz F.) |
author_facet |
Castro, C.G. Nieto-Cid, M. (Mar) Álvarez-Salgado, X.A. (Xosé Antón) Pérez, F.F. (Fiz F.) |
author_sort |
Castro, C.G. |
title |
Local remineralization patterns in the mesopelagic zone of the Eastern North Atlantic, off the NW Iberian Peninsula |
title_short |
Local remineralization patterns in the mesopelagic zone of the Eastern North Atlantic, off the NW Iberian Peninsula |
title_full |
Local remineralization patterns in the mesopelagic zone of the Eastern North Atlantic, off the NW Iberian Peninsula |
title_fullStr |
Local remineralization patterns in the mesopelagic zone of the Eastern North Atlantic, off the NW Iberian Peninsula |
title_full_unstemmed |
Local remineralization patterns in the mesopelagic zone of the Eastern North Atlantic, off the NW Iberian Peninsula |
title_sort |
local remineralization patterns in the mesopelagic zone of the eastern north atlantic, off the nw iberian peninsula |
publisher |
Centro Oceanográfico de A Coruña |
publishDate |
2006 |
url |
http://hdl.handle.net/10508/14500 https://doi.org/10.1016/j.dsr.2006.09.002 |
op_coverage |
May 2001 to April 2002 |
genre |
North Atlantic Northeast Atlantic |
genre_facet |
North Atlantic Northeast Atlantic |
op_relation |
https://www.sciencedirect.com/science/article/pii/S0967063706002329 Dinámica Y Biogeoquímica annual en la plataforma GAllega: variación de corta escala http://hdl.handle.net/10508/14500 Deep-Sea Research I, 53. 2006: 1925-1940 doi:10.1016/j.dsr.2006.09.002 |
op_rights |
Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ openAccess |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.dsr.2006.09.002 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
53 |
container_issue |
12 |
container_start_page |
1925 |
op_container_end_page |
1940 |
_version_ |
1766130056325758976 |