  Low ($\lesssim 1\%$) levels of circular polarization (CP) detected at radio
frequencies in the relativistic jets of some blazars can provide insight into
the underlying nature of the jet plasma. CP can be produced through linear
birefringence, in which initially linearly polarized emission produced in one
region of the jet is altered by Faraday rotation as it propagates through other
regions of the jet with varying magnetic field orientation. Marscher has begun
a study of jets with such magnetic geometries using the Turbulent Extreme
Multi-Zone (TEMZ) model, in which turbulent plasma crossing a standing shock in
the jet is represented by a collection of thousands of individual plasma cells,
each with distinct magnetic field orientations. Here we develop a radiative
transfer scheme that allows the numerical TEMZ code to produce simulated images
of the time-dependent linearly and circularly polarized intensity at different
radio frequencies. In this initial study, we produce synthetic polarized
emission maps that highlight the linear and circular polarization expected
within the model.
