Article (Scientific journals)
Variability of the gas transfer velocity of CO2 in a macrotidal estuary (The Scheldt)
Borges, Alberto; Vandenborght, Jean-Pierre; Schiettecatte, Laure-Sophie et al.
2004In Estuaries, 27 (4), p. 593-603
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Abstract :
[en] We report a large set of 295 interfacial carbon dioxide (CO2) flux measurements obtained in the Scheldt estuary in November 2002 and April 2003, using the floating chamber method. From concomitant measurements of the air-water CO2 gradient, we computed the gas transfer velocity of CO2. The gas transfer velocity is well correlated to wind speed and a simple linear regression function gives the most consistent fit to the data. Based on water current measurements, we estimated the contribution of water current induced turbulence to the gas transfer velocity, using the conceptual relationship of O’Connor and Dobbins (1958). This allowed us to construct an empirical relationship to compute the gas transfer velocity of CO2 that accounts for the contribution of wind and water current. Based on this relationship, the spatial and temporal variability of the gas transfer velocity in the Scheldt estuary was investigated.Water currents contribute significantly to the gas transfer velocity, but the spatial and temporal variability (from daily to seasonal scales) is mainly related to wind speed variability.
Disciplines :
Aquatic sciences & oceanology
Environmental sciences & ecology
Author, co-author :
Borges, Alberto  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Océanographie chimique
Vandenborght, Jean-Pierre;  Université Libre de Bruxelles > Laboratoire d’Océanographie Chimique et Géochimie des Eaux
Schiettecatte, Laure-Sophie
Gazeau, Frédéric
Ferrón-Smith, Sarah;  Universidad de Cadiz > Facultad de Ciencias del Mar y Ambientales
Delille, Bruno  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Océanographie chimique
Frankignoulle, Michel
Language :
English
Title :
Variability of the gas transfer velocity of CO2 in a macrotidal estuary (The Scheldt)
Publication date :
2004
Journal title :
Estuaries
ISSN :
0160-8347
Publisher :
Estuarine Research Federation, Lawrence, United States - Kansas
Volume :
27
Issue :
4
Pages :
593-603
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
Biogest
Funders :
DG RDT - Commission Européenne. Direction Générale de la Recherche et de l'Innovation [BE]
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
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