Article (Scientific journals)
Aspects of inorganic carbon dynamics in the upwelling system off the Galician coast
Borges, Alberto; Frankignoulle, Michel
2002In Journal of Marine Systems, 32 (0), p. 181-198
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Abstract :
[en] 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 Rı´as Baixas area (RBA) and the Cape Finisterre area (CFA), the patterns of the distribution of pCO2 are complex but, in the Rı´as 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 Rı´as and the width of the continental shelf. In the Rı´as 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 Rı´as Baixas area.
Research center :
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège
Disciplines :
Aquatic sciences & oceanology
Author, co-author :
Borges, Alberto  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Océanographie chimique
Frankignoulle, Michel
Language :
English
Title :
Aspects of inorganic carbon dynamics in the upwelling system off the Galician coast
Publication date :
2002
Journal title :
Journal of Marine Systems
ISSN :
0924-7963
Publisher :
Elsevier Science, Amsterdam, Netherlands
Volume :
32
Issue :
0
Pages :
181-198
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 17 December 2008

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