Mostrar el registro sencillo del ítem Hernandez-Ayon, Jose M. Paulmier, Aurélien Garcon, Veronique Sudre, Joel Montes Torres, Ivonne Chapa-Balcorta, Cecilia Durante, Giovanni Dewitte, Boris Maes, Cristophe Bretagnon, Marine 2020-02-27T16:44:46Z 2020-02-27T16:44:46Z 2019-10
dc.identifier.citation Hernandez-Ayon, J. M., Paulmier, A., Garcon, V., Sudre, J., Montes, I., Chapa-Balcorta, C., ... & Bretagnon, M. (2019). Dynamic of the carbonate system across the Peruvian Oxygen Minimum Zone.==$Frontiers in Marine Science, 6,$==617. es_ES
dc.identifier.govdoc index-oti2018
dc.identifier.issn 2296-7745
dc.description.abstract “The oxygen minimum zone (OMZ) of Peru is recognized as a source of CO2 to the atmosphere due to upwelling that brings water with high concentrations of dissolved inorganic carbon (DIC) to the surface. However, the influence of OMZ dynamics on the carbonate system remains poorly understood given a lack of direct observations. This study examines the influence of a coastal Eastern South Pacific OMZ on carbonate system dynamics based on a multidisciplinary cruise that took place in 2014. During the cruise, onboard DIC and pH measurements were used to estimate pCO2 and to calculate the calcium carbonate saturation state ( aragonite and calcite). South of Chimbote (9◦S), water stratification decreased and both the oxycline and carbocline moved from 150m depth to 20–50m below the surface. The aragonite saturation depth was observed to be close to 50m. However, values <1.2 were detected close to 20m along with low pH (minimum of 7.5), high pCO2 (maximum 1,250μatm), and high DIC concentrations (maximum 2,300 μmol kg−1). These chemical characteristics are shown to be associated with Equatorial Subsurface Water (ESSW). Large spatial variability in surface values was also found. Part of this variability can be attributed to the influence of mesoscale eddies, which can modify the distribution of biogeochemical variables, such as the aragonite saturation horizon, in response to shallower (cyclonic eddies) or deeper (anticyclonic eddies) thermoclines. The analysis of a 21-year (1993–2014) data set of mean sea surface level anomalies (SSHa) derived from altimetry data indicated that a large variance associated with interannual timescales was present near the coast. However, 2014 was characterized by weak Kelvin activity, and physical forcing was more associated with eddy activity. Mesoscale activity modulates the position of the upper boundary of ESSW, which is associated with high DIC and influences the carbocline and aragonite saturation depths. Weighing the relative importance of each individual signal results in a better understanding of the biogeochemical processes present in the area”. es_ES
dc.format application/pdf es_ES
dc.language.iso eng es_ES
dc.publisher Frontiers Media es_ES
dc.rights info:eu-repo/semantics/openAccess es_ES
dc.rights.uri es_ES
dc.source Repositorio institucional - IGP es_ES
dc.subject Omega aragonite es_ES
dc.subject Upwelling peruvian system es_ES
dc.subject OMZ es_ES
dc.subject DIC es_ES
dc.subject PH es_ES
dc.title Dynamic of the carbonate system across the Peruvian Oxygen Minimum Zone es_ES
dc.type info:eu-repo/semantics/article es_ES
dc.subject.ocde Oceanografía, Hidrología, Recursos hídricos es_ES
dc.identifier.journal Frontiers in Marine Science es_ES
dc.description.peer-review Por pares es_ES
dc.identifier.doi 10.3389/fmars.2019.00617 es_ES




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