ORCHILEAK-Gommet - This version of ORCHIDEE has been used in publication Spatio-temporal patterns and drivers of terrestrial Dissolved Organic Carbon (DOC) leaching to the European river network. ...

• Main Author: Gomment, Céline
• Format: Article in Journal/Newspaper
• Language: English
• Published: ESPRI/IPSL 2021
• Subjects: Models/Analyses; LSM; PERMAFROST; ORGANIC CARBON; Atmospheric composition and air quality; Statistics for Analysis, modelling and assimilation SAMA; permafrost
• Online Access: https://dx.doi.org/10.14768/75ac2f47-4691-46af-9b12-b1a9629cbc56; https://data.ipsl.fr/catalog/metadata/75ac2f47-4691-46af-9b12-b1a9629cbc56

Leaching of dissolved organic carbon (DOC) from soils to the river network is an important component of the land carbon (C) budget. At regional to global scales, its significance has been estimated through simple mass budgets, often using multi-year averages of observed fluvial DOC fluxes as proxy of DOC leaching due to the limited availability of observations of the leaching flux itself. This procedure leads to a systematic underestimation of the leaching flux because of the reactivity of DOC during fluvial transport. Moreover, this procedure does not allow to reveal spatio-temporal variability in DOC leaching from soils, which is needed to better understand the drivers of DOC leaching and its impact on the local soil C budget. In this study, we use the land surface model ORCHILEAK to simulate the terrestrial C budget including leaching of DOC from the soil and its subsequent reactive transport through the river network of Europe. The model performance is not only evaluated against the sparse observations ...