The purpose of this topic is to explore how much of the waters for Noah's flood could have come from rainfall.
The reason is that when water condenses from a gas to a liquid, it releases energy .... a LOT of energy..... 2.5 million joules per kilogram. To give you an idea of how much energy that is, IIRC the condensation of abut 2 liters of water releases about the same energy as an apple would have at orbital velocities.
When I did a "back of the envelope" calculation on this one, the condensation of enough water vapor to cover the planet to a depth of one meter releases enough heat energy to raise the temperature of the atmosphere by something like 240 degrees C. Obviously, that much heat would be a significant problem for life on the surface of the Earth.
Now, I realize the atmosphere won't heat up that much for several reasons which are open to discussion also.
In order to keep this topic focused, we will assume the flood did actually take place. For that reason, any challenge to the flood having happened is
In keeping with the Biblical account, we will also assume that there are two sources of water: 1) Ranifall and 2) the "fountains" of the deep (ie: subterrainan water).
The primary question is how much water could come from rainfall before there is a serious problem with the heat.
For convenience, the following values are provided:
The latent heat of condensation of water = 2.5 million joules per kg.
The specific heat of air = 1000 joules per kilogram.
The mass of one cubic meter of water = 1000 kg.
The surface area of the Earth = 5.1 * 1014 square meters.
Mass of Earth's atmosphere = 5.3 * 1018 kg.
Hopefully, Calypsis will join in and begin by calculating how much the energy released by condensation of enough water vapor to cover the Earth to a depth of one meter. We can then look at what would be a reasonable estimate of the total rainfall before atmospheric heat becomes a problem. (I do have an estimate in mind and, interestingly enough, it agrees with what Dr. Walt Brown has said in a discussion with IndyDave that was recorded and posted on the internet some time ago.)
(Note: We will also assume the laws of physics have not been suspended by God.)