Reference : Variability of the gas transfer velocity of CO2 in a macrotidal estuary (The Scheldt)
Scientific journals : Article
Life sciences : Aquatic sciences & oceanology
Life sciences : Environmental sciences & ecology
http://hdl.handle.net/2268/2111
Variability of the gas transfer velocity of CO2 in a macrotidal estuary (The Scheldt)
English
Borges, Alberto mailto [Université de Liège - ULg > 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 mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Océanographie chimique >]
Frankignoulle, Michel [> > > >]
2004
Estuaries
Estuarine Research Federation
27
4
593-603
Yes (verified by ORBi)
International
0160-8347
Lawrence
KS
[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.
Commission européenne : Direction générale de la Recherche ; Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
Biogest
Researchers
http://hdl.handle.net/2268/2111
also: http://hdl.handle.net/2268/2694
10.1007/BF02907647
http://www.springerlink.com/content/e8810g13673m85t6/

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