Articles | Volume 19, issue 3
https://doi.org/10.5194/bg-19-931-2022
https://doi.org/10.5194/bg-19-931-2022
Research article
 | 
15 Feb 2022
Research article |  | 15 Feb 2022

Nutrient transport and transformation in macrotidal estuaries of the French Atlantic coast: a modeling approach using the Carbon-Generic Estuarine Model

Xi Wei, Josette Garnier, Vincent Thieu, Paul Passy, Romain Le Gendre, Gilles Billen, Maia Akopian, and Goulven Gildas Laruelle

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Cited articles

Arndt, S., Regnier, P., and Vanderborght, J. P.: Seasonally-resolved nutrient export fluxes and filtering capacities in a macrotidal estuary, J. Marine Syst., 78, 42–58, https://doi.org/10.1016/j.jmarsys.2009.02.008, 2009. 
Arndt, S., Lacroix, G., Gypens, N., Regnier, P., and Lancelot, C.: Nutrient dynamics and phytoplankton development along an estuary–coastal zone continuum: A model study, J. Marine Syst., 84, 49–66, https://doi.org/10.1016/j.jmarsys.2010.08.005, 2011. 
Baker, A.: Land Use and Water Quality, in: Encyclopedia of Hydrological Sciences, edited by: Anderson, M. G. and McDonnell, J. J., https://doi.org/10.1002/0470848944.hsa195, 2006. 
Barbier, E. B., Hacker, S. D., Kennedy, C., Koch, E. W., Stier, A. C., and Silliman, B. R.: The value of estuarine and coastal ecosystem services, Ecol. Monogr., 81, 169–193, https://doi.org/10.1890/10-1510.1, 2011. 
Bauer, J. E., Cai, W. J., Raymond, P. A., Bianchi, T. S., Hopkinson, C. S., and Regnier, P. A.: The changing carbon cycle of the coastal ocean, Nature, 504, 61–70, https://doi.org/10.1038/nature12857, 2013. 
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Short summary
Estuaries are key reactive ecosystems along the land–ocean aquatic continuum and are often strongly impacted by anthropogenic activities. We calculated nutrient in and out fluxes by using a 1-D transient model for seven estuaries along the French Atlantic coast. Among these, large estuaries with high residence times showed higher retention rates than medium and small ones. All reveal coastal eutrophication due to the excess of diffused nitrogen from intensive agricultural river basins.
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