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      Carbono antropogénico y masas de agua en el golfo de Vizcaya Translated title: Anthropogenic carbon and water masses in the Bay of Biscay

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          Abstract

          En septiembre de 2005, como parte del proyecto VACLAN (Variabilidad Climática en el Atlántico Norte) se muestreó una sección a través del golfo de Vizcaya. En este trabajo se estimó la distribución de las diferentes masas de agua usando un método óptimo multiparamétrico extendido y se estudió la distribución del carbono antropogénico calculado en las mismas usando dos métodos distintos. Con respecto a las masas de agua presentes en la región, la capa de Agua Central del Este del Atlántico Norte está principalmente constituida por su componente subpolar y el agua Mediterránea aparece muy diluida, aumentando su dilución hacia el noreste. En relación al inventario de carbono antropogénico hay pequeñas diferencias entre los dos métodos utilizados, 95 vs 87 mol C m-2, aunque en ambos se observa el mismo patrón de distribución vertical, la concentración decrece con la profundidad. El Agua Central del Atlántico Nororiental presenta el mayor inventario de carbono antropogénico, que corresponde a más del 50% de la columna total (52%). Este trabajo confirma el papel relevante del golfo de Vizcaya como un sumidero de carbono antropogénico en la circulación oceánica.

          Translated abstract

          As part of the VACLAN (Climate Variability in the North Atlantic) project, a section covering the Bay of Biscay was sampled in September 2005. This work estimates the distribution of the different water masses in the region using an extended optimum multiparametric method and analyzes water mass distribution of anthropogenic carbon as calculated using two different approaches. The Eastern North Atlantic Central Water layer is mainly constituted by its subpolar component and Mediterranean Water appears very diluted, its dilution increasing northeastward. In relation to the anthropogenic carbon inventory, small differences were found between the two different methods used, 95 vs 87 mol C m-2, though both show the same distribution pattern, the concentration decreasing with depth. Eastern North Atlantic Central Water presents the highest anthropogenic carbon inventory, supporting more than 50% of the total column (52%). This work confirms the relevant role of the Bay of Biscay as a sink zone in the oceanic circulation.

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          MEASUREMENT OF THE APPARENT DISSOCIATION CONSTANTS OF CARBONIC ACID IN SEAWATER AT ATMOSPHERIC PRESSURE1

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            The oceanic sink for anthropogenic CO2.

            Using inorganic carbon measurements from an international survey effort in the 1990s and a tracer-based separation technique, we estimate a global oceanic anthropogenic carbon dioxide (CO2) sink for the period from 1800 to 1994 of 118 +/- 19 petagrams of carbon. The oceanic sink accounts for approximately 48% of the total fossil-fuel and cement-manufacturing emissions, implying that the terrestrial biosphere was a net source of CO2 to the atmosphere of about 39 +/- 28 petagrams of carbon for this period. The current fraction of total anthropogenic CO2 emissions stored in the ocean appears to be about one-third of the long-term potential.
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              A comparison of the equilibrium constants for the dissociation of carbonic acid in seawater media

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                ciemar
                Ciencias marinas
                Cienc. mar
                Universidad Autónoma de Baja California, Instituto de Investigaciones Oceanológicas (Ensenada )
                0185-3880
                April 2012
                : 38
                : 1b
                : 191-207
                Affiliations
                [1 ] Consejo Superior de Investigaciones Científicas Spain
                [2 ] Centro Oceanográfico de A Coruña Spain
                [3 ] Centro Oceanográfico de Santander Spain
                Article
                S0185-38802012000200005

                http://creativecommons.org/licenses/by/4.0/

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                Categories
                Marine & Freshwater Biology

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