DomKen
Posts: 19457
Joined: 7/4/2004 From: Chicago, IL Status: offline
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quote:
ORIGINAL: Phydeaux quote:
ORIGINAL: DomKen quote:
ORIGINAL: Phydeaux quote:
ORIGINAL: DomKen quote:
ORIGINAL: Phydeaux I'll make the point again, Ken. Lets suppose, just for arguments sake that the humidity in antartica (absolute) is zero. It isn't, infact, it can't be, since the ice vapor pressure exists in equilibrium to the air above it. But, lets suppose its zero. Ice vapor pressure? Are you really claiming that sublimation of ice is a major source of humidity in the air over Antarctica? You do understand that even at 4000m above sea level the air pressure is still fairly high right? quote:
Draw a box around antartica. Now, the waters around antartica are, well, water. The air just above that water is very cold - but not as cold. The water blowing off the oceans and into antartica will be saturated and will deliver water to the continent. Only to the shoreline areas. The inland areas consistently have a high pressure area and the onshore winds do not get that far. You do understand that sublimation occurs regardless of air pressure? That sublimation will increase as pressure decreases. 4000 meters is irrelevent to the question - yet, it would HELP sublimation not hurt it. Go run through a few Peng Robinson equations, if you doubt it. Sublimation does not occur as readily as the temperature goes down. In simple terms sublimation increases as the temperature goes up or the atmospheric pressure goes down. But no matter water sublimation does not result in any increase in the amount of water in the system. So there is no way that sublimation followed by redeposition can result in an increase of ice on Antarctica. So your own claim contradicts itself. And we are right back to the only way more precipitation is falling over the continent is if the air is warmer. Ken, you're repeating back what I said. I said that water sublimation does not result in ice accumulation. Try reading what I wrote, instead of what you wish I wrote. And no, we are not back to the same: We now agree that water delivery is not a function of aridity in Antartica. And you have no counter for that if there are more prevailing winds, or higher humidity prevailing winds that more water gets delivered to antartica. Bullshit. You claimed that there was more precipitation in Antarctica, you claimed the ice cap was getting thicker, I then pointed out that that simply wasn't true. You then made a series of claims about sources of water vapor, none of which were true. then you claimed the source was sublimation of the existing ice. That is obviously incorrect. So that brings us right back to the undeniable fact, if more precipitation is occurring over the continent the air is warmer than it was. As to your fantasy of sea winds reaching the high plateaus you cannot support that claim. The fact is the interior of Antarctica is under a stable high pressure zone and that keeps any air mass or winds from the sea from getting inland.
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