  We characterize the behavior of quantum correlations under the influence of
local noisy channels. Intuition suggests that such noise should be detrimental
for quantumness. When considering qubit systems, we show for which channel this
is indeed the case: the amount of quantum correlations can only decrease under
the action of unital channels. However, non-unital channels (e.g. such as
dissipation) can create quantum correlations for some initially classical
state. Furthermore, for higher-dimensional systems even unital channels may
increase the amount of quantum correlations. Thus, counterintuitively, local
decoherence can generate quantum correlations.
