@MPI_Meteo

The most computationally expensive part of such models is the transport (by #advection and #diffusion) of #biogeochemical #tracers (zoo and #phytoplankton #nutrients, organic and inorganic #carbon, etc) with the #ocean #flow.

The more tracers we include to represent the complexity of #ocean biogeochemistry, the slower are the model runs. Same problem arises when the #spatial #resolution of an #ESM increases.

Biogeochemistry models can become a bottleneck in #ESM computations. 2/