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Science 16 October 1998:
Vol. 282. no. 5388, pp. 434 - 436
DOI: 10.1126/science.282.5388.434
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Reports

Carbon Dioxide Emission from European Estuaries

Michel Frankignoulle, * Gwenaël Abril, Alberto Borges, Isabelle Bourge, Christine Canon, Bruno Delille, Emile Libert, Jean-Marie Théate

The partial pressure of carbon dioxide (pCO2) in surface waters and related atmospheric exchanges were measured in nine European estuaries. Averaged fluxes over the entire estuaries are usually in the range of 0.1 to 0.5 mole of CO2 per square meter per day. For wide estuaries, net daily fluxes to the atmosphere amount to several hundred tons of carbon (up to 790 tons of carbon per day in the Scheldt estuary). European estuaries emit between 30 and 60 million tons of carbon per year to the atmosphere, representing 5 to 10% of present anthropogenic CO2 emissions for Western Europe.

Université de Liège, Mécanique des Fluides Géophysiques, Unité d'Océanographie Chimique, Institut de Physique (B5), B4000 Liège, Belgium.
*   To whom correspondence should be addressed. E-mail: Michel.Frankignoulle{at}ulg.ac.be

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Science. ISSN 0036-8075 (print), 1095-9203 (online)