  In this work we investigate the impact of intrinsic charm on the prompt
atmospheric neutrino flux. The color dipole approach to heavy quark production
is generalized to include the contribution of processes initiated by charm
quarks. The prompt neutrino flux is calculated assuming the presence of
intrinsic charm in the wave function of the projetile hadron. The predictions
are compared with previous color dipole results which were obtained taking into
account only the process initiated by gluons. In addition, we estimate the
atmospheric (conventional + prompt) neutrino flux and compare our predictions
with the ICECUBE results for the astrophysical neutrino flux. Our results
demonstrate that the contribution of the charm quark initiated process is non -
negligible and that the prompt neutrino flux can be enhanced by a factor
$\approx$ 2 at large neutrino energies if an intrinsic charm component is
present in the proton wave function.
