  We have investigated the dynamics of quantum discord and entanglement for two
qubits subject to independent global transverse and/or longitudinal memoryless
noisy classical fields. Global transverse and/or longitudinal random fields are
found to drive the system to maximally discordant mixed separable steady states
for suitable initial conditions. Moreover, two independent noises in the system
are found to enhance both the steady state randomness and quantum discord in
the absence of entanglement for some initial states.
