Yeah, I heard that you are an archeologist. That's good because then you might be able to tell me why an Ice Age would be impossible when the earth is already covered in water (especially when you consider that a lot of the precipitation that would have fallen during the flood would have been snow due to the low temperatures caused by having 100% cloud cover)
Ice ages were not only possible, there have been several, perhaps five, of them.
The most recent ice age has probably extended for well over two million years, with a number of advances and retreats. The most recent glacial maximum was some 15-17,000 years ago (depending on location), and we have been in a retreat since then. That's good, as there were two to three miles of ice along the northern parts of the US and throughout much of Canada.
However, there is no evidence that the earth has been entirely covered with water at any time in the last few hundred million years, and certainly not during the most recent ice age.
As for 100% cloud cover forcing snow, I think you'll have to explain that better, perhaps with some references.
It might also help if you could specify a date for the global flood. A lot of biblical scholars focus in on the period of about 4,350 years ago. Is this something you agree with, or do you have a different date in mind?