  The lunar history of water deposition, loss, and transport post-accretion has
become an important consideration in relation to the possibility of a human
outpost on the Moon. Very recent work has shown that a secondary primordial
atmosphere of up to 10 mb could have been emplaced ~3.5 billion years ago due
to volcanic outgassing from the maria. Using a zero dimensional chemistry model
we demonstrate the temperature dependence of the resulting major atmospheric
components (CO or CO$_2$). We use a three dimensional general circulation model
to test the viability of such an atmosphere and derive its climatological
characteristics. Based on these results we then conjecture on its capability to
transport volatiles outgassed from the maria to the permanently shadowed
regions at the poles. Our preliminary results demonstrate that atmospheres as
low as 1 mb are viable and that permanent cold trapping of volatiles is only
possible at the poles.
