FABM is a Fortran 2003 programming framework for biogeochemical models of marine and freshwater systems.
FABM is published in "Bruggeman, J., Bolding, K., 2014. A general framework for aquatic biogeochemical models. Environmental Modelling & Software 61: 249–265. DOI: 10.1016/j.envsoft.2014.04.002"
Further information is provided on the FABM wiki