nom_organisme nom_organisme nom_organisme nom_organisme
Simulation of fluvial DOC fluxes in ORCHIDEE – Technical implementation and results for the Amazon River
Ronny Lauerwald
Dépt. des Sciences de la Terre et de l'Environnement, Université Libre de Bruxelles
Jeudi 02/06/2016, 11:00-12:00
Bât. 701, P. 17C, LSCE Orme des Merisiers

Although land-to-ocean transfer of organic C through the river network has been recognized as an important component of the global C cycle (IPCC – 5AR), it has so far not been represented in ESMs. Here, for the first time, we present the implementation of fluvial dissolved organic carbon (DOC) transport into ORCHIDEE. This implementation extends the soil organic C branch ORCHIDEE-SOM (Bertrand Guenet and colleagues at the LSCE), and includes DOC fluxes from the tree tops to the ground and from soils to the coast, in-stream decomposition of DOC and subsequent CO2 evasion from the water surface. Moreover, an improved floodplain inundation scheme will be introduced. Preliminary results for the Amazon River basin are presented and compared to literature data. The results allow for the quantification of allochthonous sources to river DOC and CO2, highlighting the importance of riparian wetlands for the river C dynamics.

Contact : Amaelle Landais
Retour en haut