THE 3 forms of heat loss from an object or surface at earth's surface are...

[Sunsettommy]

From post 12:

Quote:You can't transport "cold" as such. Cold is only how our senses let us know an object or environment has less heat than is comfortable for our bodies. Cold in itself does not exist! Only differing amounts of heat in matter.

I'm not saying that evaporation isn't important. Just that you seem to have something against convection. Greenhouses work by stopping convection, thus trapping a warm body of air that would other wise rise. As does a layer of clouds on a winter night in the UK that prevents heat loss by convection and thus prevents frost.

You shouldn't be thinking of "cold" as a physical entity in itself. But of differing levels of heat. At all temperatures above 0K, all bodies have some heat, i.e. some vibrational energy in their molecular structure.

The way I see it is that the word cold in weather/climate matters only describes a reduced energy state of molecules that are involved in local areas of the planets surface to the atmosphere.

We as humans use the word as a description that explains why we are shivering or feel uncomfortable with the local surrounding air we are in.But at all times there is still warmth in it because the molecules are still moving and have had absorbed radiation to make them still move around.

In large areas of space is a vacuum or nearly so that can not be "cold" because there is almost no matter in it at all.It is a confusing concept since it requires actual molecules and gases to make the existence of what we called cold to be possible.But it is merely a lower energy state that make it feel or measured as being cold.It is a living beings perception through our senses that we are actually feeling a reduced energy state.

Without matter there is nothing there to make it feel cold.There is also no heat either in the absence of matter.

The gas that is compressed in a refrigerators compressor causes heat due to input pressure and then when released and spread out the gas cools down greatly to make it feel cold.The amount of gas in the compressor was the same but the pressure and volume area changes to make the heat be spread out and radiated away.

Cold by itself does not really exist.