#L12 MOSART-BGC in ACME

Abstract

Representing riverine biogeochemistry is a critical step to fill the missing links between land and aquatic interfaces and the biogeochemistry cycling in the atmosphere-land-river-ocean continuum. As such, we here extend the Model for Scale Adaptive River Transport (MOSART) to include the riverine transportation and transformation of biogeochemical fluxes, and hence denote the model as MOSART-BGC. MOSART-BGC integrates the existing riverine modules, MOSART-Water, MOSART-heat and MOSART-sediment, and the Biogeochemical Transport and Reaction (BeTR) module version 2 of land biogeochemistry.  Our preliminary global simulation results will demonstrate the transport of dissolved organic carbon (DOC) and dissolved inorganic carbon (DIC) from ALM-BeTR2 to rivers, through the networks and into the ocean, and riverine transformation of DOC into DIC and evasion of DIC into atmosphere (CO2) as a simple function of DOC, DIC concentrations and water temperature. Finally, we will discuss current limitations and next steps to achieve the coupled modeling of river and land biogeochemistry.