  The Central Molecular Zone (CMZ), covering the inner ~1$^\circ$ of the
Galactic plane has been mapped at 2 mm using the GISMO bolometric camera on the
30 m IRAM telescope. The $21''$ resolution maps show abundant emission from
cold molecular clouds, from star forming regions, and from one of the Galactic
center nonthermal filaments. In this work we use the Herschel Hi-GAL data to
model the dust emission across the Galactic center. We find that a
single-temperature fit can describe the 160 -- 500 $\mu$m emission for most
lines of sight, if the long-wavelength dust emissivity scales as
$\lambda^{-\beta}$ with $\beta \approx 2.25$. This dust model is extrapolated
to predict the 2 mm dust emission. Subtraction of the model from the GISMO data
provides a clearer look at the 2 mm emission of star-forming regions and the
brightest nonthermal filament.
