La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Inorganic Carbon Fluxes in the Inner Elbe Estuary, Germany
Auteurs :	Thorben Amann, Auteur ; Andreas Weiss, Auteur ; Jens Hartmann, Auteur
Type de document :	Article
Dans :	Estuaries and Coasts (38(1) JAN 2015)
Article en page(s) :	192-210
Résumé :	Estuaries are strong sources for CO2 to the atmosphere. At the same time, they are intense reactors for dissolved matter at the land-ocean interface. The temporal and spatial variations of inorganic carbon fluxes in the inner Elbe estuary were studied based on 18 transects and a budget was constructed. The freshwater part of the Elbe estuary, a potential hotspot for carbon transformation, was evaluated using GIS-derived surface areas, isotopic DIC data and modelled pCO(2). Calculation of pCO(2) with commonly used constants yield 20 % higher values if compared to thermodynamically modelled results, integrating the actual ionic composition of the sample. With these improved calculations, it could be confirmed that this part is important for carbon turnover. Highest pCO(2) values and strongest CO2 efflux per square metre compared to the rest of the inner Elbe estuary were observed. It contributes 10 % of the CO2 fluxes to the atmosphere, and

Lundi , mardi et jeudi de 9h à 12h et de 13h à 17h00 : ouverture au public ...