We conducted a 15-year simulation with the ECHAM version 4 (AMIP2) model including a series of carbon monoxide (CO) tracers tagged by emission region and type and also including radon and beryllium 7 and 10. The model has been run in T42 resolution (2.8x2.8 deg) with 19 vertical levels, and it has been nudged with meteorological data (vorticity, divergence, surface temperature and sea level pressure) from the ECMWF 15-year reanalysis data set (ERA-15). We expect to use these data to analyse the feedbacks between climate variability and the chemical composition of the troposphere.