  Results are presented from a 3-D Pluto general circulation model (GCM) that
includes conductive heating and cooling, non-local thermodynamic equilibrium
(non-LTE) heating by methane at 2.3 and 3.3 microns, non-LTE cooling by cooling
by methane at 7.6 microns, and LTE CO rotational line cooling. The GCM also
includes a treatment of the subsurface temperature and surface-atmosphere mass
exchange. An initially 1 m thick layer of surface nitrogen frost was assumed
such that it was large enough to act as a large heat sink (compared with the
solar heating term) but small enough that the water ice subsurface properties
were also significant. Structure was found in all three directions of the 3-D
wind field (with a maximum magnitude of order 10 m/s in the horizontal
directions and 10$^-5$ microbar/s in the vertical direction). Prograde jets
were found at several altitudes. The direction of flow over the poles was found
to very with altitude. Broad regions of up-welling and down-welling were also
found. Predictions of vertical temperature profiles are provided for the Alice
and REX instruments on New Horizons, while predictions of light curves are
provided for ground-based stellar occultation observations. With this model
methane concentrations of 0.2% and 1.0% and 8 and 24 microbar surface pressures
are distinguishable. For ground-based stellar occultations, a detectable
difference exists between light curves with the different methane
concentrations, but not for different initial global mean surface pressures.
