  Turbulent transport of trace impurities impurities in the edge and
scrape-off-layer of tokamak fusion plasmas is modelled by three dimensional
electromagnetic gyrofluid computations including evolution of plasma profile
gradients. The source function of impurity ions is dynamically computed from
pre-determined measured and calculated electron impact ionization cross section
data. The simulations describe the generation and further passive turbulent
E-cross-B advection of the impurities by intermittent fluctuations and coherent
filamentary structures (blobs) across the scrape-off-layer.
