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Aspects of dissolved inorganic carbon dynamics in the upwelling system off the Galician coast
Borges, A.V.; Frankignoulle, M. (2002). Aspects of dissolved inorganic carbon dynamics in the upwelling system off the Galician coast, in: Frankignoulle, M. (Ed.) Exchange Processes at the Ocean Margins. Selected papers from the 32nd International Liège Colloquium on Ocean Hydrodynamics, held in Liège, Belgium on May 8-12, 2000. Journal of Marine Systems, 32(Special Issue 1-3): pp. 181-198. dx.doi.org/10.1016/S0924-7963(02)00031-3
Peer reviewed article  

Beschikbaar in  Auteurs | Dataset 
    VLIZ: Open Repository 237520 [ OMA ]
Documenttype: Congresbijdrage

Trefwoorden
    Motion > Water motion > Vertical water movement > Upwelling
    Topographic features > Submarine features > Continental margins
    Spain, Galicia [Marine Regions]
    Marien
Author keywords
    pCO2<; sub>; upwelling; continental margin exchange; Galician coast

Auteurs  Top | Dataset 
  • Borges, A.V., meer
  • Frankignoulle, M., meer

Abstract
    In the present paper, we report data on the partial pressure of CO2 (pCO2) in surface seawater off the Galician coast, obtained during four cruises carried out in summer (upwelling conditions). Over the continental shelf, two processes that have opposite effects control pCO2 in surface waters: (a) the input from upwelling of deep cold water with high CO2 content that causes oversaturation of CO2 and (b) primary production that tends to decrease pCO2. In offshore waters, the distribution of pCO2 is mainly controlled by temperature change. In two distinct hydrographic coastal regions, the Rías Baixas area (RBA) and the Cape Finisterre area (CFA), the patterns of the distribution of pCO2 are complex but, in the Rías Baixas area, the averaged pCO2 values are systematically lower and temperature values higher. These differences between the two hydrographic regions are mainly related to the combination of outwelling from the Rías and the width of the continental shelf. In the Rías Baixas area, outwelling affects significantly the adjacent inner continental shelf but to a much lesser extent the outer continental shelf. In the Cape Finisterre area, the continental shelf is narrower and the ratio between the surface area of the shelf to the length of the shelf break is lower, inducing during an upwelling event, lower temperature and higher pCO2 values in surface waters than in the Rías Baixas area.

Dataset
  • EUROTROPH project dataset: Nutriënt cycli en de trofische status van kustecosystemen, meer

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