Only in part. It's also determined by the evaporating water, as well as the nature and amount of radiative energy flowing into and out of the system. In fact, at higher relative humidity rates, the water content of the air does more to drive the air temp than the air temp does to drive the water!

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If I set the budget, we'd have Ares and more. Unfortunately, I don't set the budget, and Ares is just too expensive and too far out for us to accomplish our goals within the budget we were given.

If we halt the ISS, all versions of Ares, and transport Orion and Altair aboard DIRECTv3's Jupiter family of Shuttle-Derived Launch Vehicles, we just might make it back to the Moon by 2020.