[en] The global distributions of ²²²Rn, ²¹⁰Pb and ⁷Be in the atmosphere are simulated with an aerosol/climate model set up by implementing parametrizations for passive tracers and particularly aerosols into an existing general circulation model (GCM). One aim of this approach is to test, calibrate and, if necessary, correct parametrizations in order to improve modelling confidence for other tracers for which observational control is more limited. As a further step, one can examine the model results to check the simulated climate and unravel atmospheric features which control the distribution of these tracers. Compared to other species, the sources of ²²²Rn, ²¹⁰Pb and ⁷Be are relatively well known and highly differentiated. They are therefore appropriate for checking and calibrating an aerosol/climate model. Emerging from a homogeneous continental source, ²²²Rn is a telluric gas which provides a test of transport away from the Earth's surface. Atoms of ²¹⁰Pb and ⁷Be attach themselves very quickly to fine particles in the lower and upper atmospheres and can thus be considered to behave like aerosols with a low rate of sedimentation. Simulated surface ²¹⁰Pb and ⁷Be concentrations are smaller than the values observed, probably indicating that deposition is too high in the model. (author). 15 refs, 2 figs, 1 tab