During the battle with a rouge artificial intelligence unit the player places an orange portal within the facility (of course) and the only way of escaping becomes apparent by firing a blue portal to the moon. The pressures of the two obviously causes a suction towards the moon because of the pressure differential. (there are only two portals; orange and blue)
My question is this, if that portal were to remain linked to the moon and the pressure from the moon continuosly sucking the atmosphere of the earth, would this portal (roughly 10 meters in circumference (guesstimate)) be sufficient to drain all of the earths atmosphere into space? Akin to a space shuttle having a hull breach?