NDLI: Variability of the gas transfer velocity of CO$_{2}$ in a macrotidal estuary (the Scheldt)

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Variability of the gas transfer velocity of CO$_{2}$ in a macrotidal estuary (the Scheldt)

Content Provider	Springer Nature Link
Author	Borges, Alberto Vieira Vanderborght, Jean Pierre Schiettecatte, Laure Sophie Gazeau, Frédéric Ferrón Smith, Sarah Delille, Bru Frankigulle, Michel
Copyright Year	2004
Abstract	We report a large set of 295 interfacial carbon dioxide (CO$_{2}$) 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 CO$_{2}$ gradient, we computed the gas transfer velocity of CO$_{2}$. 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 CO$_{2}$ 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.
Starting Page	593
Ending Page	603
Page Count	11
File Format	PDF
ISSN	01608347
Journal	Estuaries
Volume Number	27
Issue Number	4
Language	English
Publisher	Springer-Verlag
Publisher Date	2004-01-01
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Environment Ecology Geosciences Freshwater & Marine Ecology Environmental Management Nature Conservation
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Aquatic Science Environmental Science

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