Mineralization of biogenic materials in the water masses of the South Atlantic Ocean. II: Stoichiometric ratios and mineralization rates
International audience The variability of nitrate (N), phosphate (P), silicate (Si) and Apparent Oxygen Utilization (AOU) due to water mass mixing was objectively separated from the variability due to mineralization of biogenic materials in the western and eastern South Atlantic Ocean on basis of th...
Published in: | Progress in Oceanography |
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ftccsdartic:oai:HAL:hal-01023707v1 2023-05-15T17:35:48+02:00 Mineralization of biogenic materials in the water masses of the South Atlantic Ocean. II: Stoichiometric ratios and mineralization rates Alvarez Salgado, Xa Alvarez, M. Brea, S. Mémery, Laurent Messian, Mj Consejo Superior de Investigaciones Cientificas Instituto de Investigacions Marinas Instituto Espanol de Oceanografia Instituto Español de Oceanografía Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) School of Environmental Sciences Norwich University of East Anglia Norwich (UEA) 2014-04-01 https://hal.univ-brest.fr/hal-01023707 https://doi.org/10.1016/j.pocean.2013.12.009 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.pocean.2013.12.009 hal-01023707 https://hal.univ-brest.fr/hal-01023707 doi:10.1016/j.pocean.2013.12.009 ISSN: 0079-6611 Progress in Oceanography https://hal.univ-brest.fr/hal-01023707 Progress in Oceanography, Elsevier, 2014, 123, pp.24-37. ⟨10.1016/j.pocean.2013.12.009⟩ ISOPYCNAL SURFACES CARBON-TETRACHLORIDE DEEP-OCEAN REDFIELD RATIOS REMINERALIZATION RATIOS DISSOLVED ORGANIC-MATTER EASTERN NORTH-ATLANTIC ANTHROPOGENIC CO2 TWILIGHT ZONE REGRESSION ACL [SDV]Life Sciences [q-bio] [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2014 ftccsdartic https://doi.org/10.1016/j.pocean.2013.12.009 2021-12-19T03:03:35Z International audience The variability of nitrate (N), phosphate (P), silicate (Si) and Apparent Oxygen Utilization (AOU) due to water mass mixing was objectively separated from the variability due to mineralization of biogenic materials in the western and eastern South Atlantic Ocean on basis of the constrained Optimum MultiParameter (OMP) analysis implemented in the companion manuscript. Using a consensus linear regression model, AOU/N/P/Si mineralization ratios and the corresponding oxygen utilisation rates (OURs) were obtained for the realm of each water mass defined after the OMP analysis. Combining these results with a stoichiometric model, the organic carbon to nitrogen (C/N) ratios and the biochemical composition (carbohydrates + lipids, proteins and phosphorus compounds) of the mineralized material, were derived. The vertical variability of the AOU/N, AOU/P and AOU/C mineralization ratios pointed to a significant fractionation during the mineralization of sinking organic matter. This fractionation was confirmed by preferential consumption of organic phosphorous compounds and proteins in shallower levels, which produced an increase of the C/N ratio of the mineralised materials of 0.5 +/- 0.2 mol C mol N-1 every 1000 dbar. OURs in the twilight zone decreased quadratically with the C/N molar ratio of the mineralised material and exponentially with pressure (p, in 10(3) dbar) according to the following regression equation: Ln (OUR)=6.2(+/- 1.2)-2.0(+/- 0.7)* Ln (C/N)-0.6(+/- 0.2)* p(r(2)=0.87, p<0.006, n=8). This variability in the rates and stoichiometric ratios of the biogenic material mineralization compromises our capacity to predict the ocean biogeochemistry response to global change, including the CO2 uptake and storage and the corresponding feedback mechanisms. Article in Journal/Newspaper North Atlantic South Atlantic Ocean Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Progress in Oceanography 123 24 37 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
ISOPYCNAL SURFACES CARBON-TETRACHLORIDE DEEP-OCEAN REDFIELD RATIOS REMINERALIZATION RATIOS DISSOLVED ORGANIC-MATTER EASTERN NORTH-ATLANTIC ANTHROPOGENIC CO2 TWILIGHT ZONE REGRESSION ACL [SDV]Life Sciences [q-bio] [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
ISOPYCNAL SURFACES CARBON-TETRACHLORIDE DEEP-OCEAN REDFIELD RATIOS REMINERALIZATION RATIOS DISSOLVED ORGANIC-MATTER EASTERN NORTH-ATLANTIC ANTHROPOGENIC CO2 TWILIGHT ZONE REGRESSION ACL [SDV]Life Sciences [q-bio] [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Alvarez Salgado, Xa Alvarez, M. Brea, S. Mémery, Laurent Messian, Mj Mineralization of biogenic materials in the water masses of the South Atlantic Ocean. II: Stoichiometric ratios and mineralization rates |
topic_facet |
ISOPYCNAL SURFACES CARBON-TETRACHLORIDE DEEP-OCEAN REDFIELD RATIOS REMINERALIZATION RATIOS DISSOLVED ORGANIC-MATTER EASTERN NORTH-ATLANTIC ANTHROPOGENIC CO2 TWILIGHT ZONE REGRESSION ACL [SDV]Life Sciences [q-bio] [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience The variability of nitrate (N), phosphate (P), silicate (Si) and Apparent Oxygen Utilization (AOU) due to water mass mixing was objectively separated from the variability due to mineralization of biogenic materials in the western and eastern South Atlantic Ocean on basis of the constrained Optimum MultiParameter (OMP) analysis implemented in the companion manuscript. Using a consensus linear regression model, AOU/N/P/Si mineralization ratios and the corresponding oxygen utilisation rates (OURs) were obtained for the realm of each water mass defined after the OMP analysis. Combining these results with a stoichiometric model, the organic carbon to nitrogen (C/N) ratios and the biochemical composition (carbohydrates + lipids, proteins and phosphorus compounds) of the mineralized material, were derived. The vertical variability of the AOU/N, AOU/P and AOU/C mineralization ratios pointed to a significant fractionation during the mineralization of sinking organic matter. This fractionation was confirmed by preferential consumption of organic phosphorous compounds and proteins in shallower levels, which produced an increase of the C/N ratio of the mineralised materials of 0.5 +/- 0.2 mol C mol N-1 every 1000 dbar. OURs in the twilight zone decreased quadratically with the C/N molar ratio of the mineralised material and exponentially with pressure (p, in 10(3) dbar) according to the following regression equation: Ln (OUR)=6.2(+/- 1.2)-2.0(+/- 0.7)* Ln (C/N)-0.6(+/- 0.2)* p(r(2)=0.87, p<0.006, n=8). This variability in the rates and stoichiometric ratios of the biogenic material mineralization compromises our capacity to predict the ocean biogeochemistry response to global change, including the CO2 uptake and storage and the corresponding feedback mechanisms. |
author2 |
Consejo Superior de Investigaciones Cientificas Instituto de Investigacions Marinas Instituto Espanol de Oceanografia Instituto Español de Oceanografía Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) School of Environmental Sciences Norwich University of East Anglia Norwich (UEA) |
format |
Article in Journal/Newspaper |
author |
Alvarez Salgado, Xa Alvarez, M. Brea, S. Mémery, Laurent Messian, Mj |
author_facet |
Alvarez Salgado, Xa Alvarez, M. Brea, S. Mémery, Laurent Messian, Mj |
author_sort |
Alvarez Salgado, Xa |
title |
Mineralization of biogenic materials in the water masses of the South Atlantic Ocean. II: Stoichiometric ratios and mineralization rates |
title_short |
Mineralization of biogenic materials in the water masses of the South Atlantic Ocean. II: Stoichiometric ratios and mineralization rates |
title_full |
Mineralization of biogenic materials in the water masses of the South Atlantic Ocean. II: Stoichiometric ratios and mineralization rates |
title_fullStr |
Mineralization of biogenic materials in the water masses of the South Atlantic Ocean. II: Stoichiometric ratios and mineralization rates |
title_full_unstemmed |
Mineralization of biogenic materials in the water masses of the South Atlantic Ocean. II: Stoichiometric ratios and mineralization rates |
title_sort |
mineralization of biogenic materials in the water masses of the south atlantic ocean. ii: stoichiometric ratios and mineralization rates |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://hal.univ-brest.fr/hal-01023707 https://doi.org/10.1016/j.pocean.2013.12.009 |
genre |
North Atlantic South Atlantic Ocean |
genre_facet |
North Atlantic South Atlantic Ocean |
op_source |
ISSN: 0079-6611 Progress in Oceanography https://hal.univ-brest.fr/hal-01023707 Progress in Oceanography, Elsevier, 2014, 123, pp.24-37. ⟨10.1016/j.pocean.2013.12.009⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.pocean.2013.12.009 hal-01023707 https://hal.univ-brest.fr/hal-01023707 doi:10.1016/j.pocean.2013.12.009 |
op_doi |
https://doi.org/10.1016/j.pocean.2013.12.009 |
container_title |
Progress in Oceanography |
container_volume |
123 |
container_start_page |
24 |
op_container_end_page |
37 |
_version_ |
1766135077840879616 |