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| Alvarez, M.; Brea, S.; Mercier, Herle; Alvarez-salgado, X. A.. |
| This is the first of two manuscripts dealing with the circulation, mixing, ventilation and organic matter mineralization of the South Atlantic Ocean (SAO). The present work quantifies the complex mixing of water masses in the SAO using a constrained, least-squares regression, Optimum MultiParameter (OMP) analysis. The OMP based on temperature, salinity, silicate and the conservative parameter NO, was applied on two World Ocean Circulation (WOCE) lines, A17 and A14, in the western and eastern SAO, respectively. The constrained OMP sensitivity to sources of error in the end-member characteristics, measured parameters, equation weights and oxygen to nitrogen mineralisation ratio (RN) was carefully assessed using perturbation tests. Perturbation of RN was the... |
| Tipo: Text |
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| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00171/28178/26414.pdf |
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| Alvarez-salgado, X. A.; Nieto-cid, M.; Alvarez, M.; Perez, F; Morin, P; Mercier, Herle. |
| An optimum multiparameter (OMP) analysis was applied to samples collected during a cruise in the northeast North Atlantic with the aim of objectively defining water mass realms and calculating water mass mixing-weighted average (archetypal) concentrations of dissolved organic carbon (DOC) and nitrogen (DON) and fluorescent dissolved organic matter (FDOM). The profile of archetypal DOC, which retains the basin-scale variability from the formation area of the water masses to the study area, was modeled with a constant initial concentration of 60 +/- 1 mu mol kg(-1) that decreased linearly with increasing apparent oxygen utilization (AOU) at a rate of -0.20 +/- 0.03 mol C per mol of AOU. The archetypal C:N ratio of dissolved organic matter was also modeled... |
| Tipo: Text |
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| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00139/24979/23060.pdf |
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