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At 1 degree Centigrade does dry air feel colder or wet air?
I know that in hot conditions high humidity feels hotter than low humidity due less cooling by evaporation, but does evaporation become less important in typical cold weather attire and the high heat capacity of moisture laden air become more significant?
Actually evaporation absorbs heat and condensation or freezing releases heat.
Looking further into the heat capacities of moist and dry air there is very little difference, especially at low temperatures so not a significant factor.
3 Answers
- Michel VerheugheLv 78 years agoFavorite Answer
I won't really agree with Warren because it is evaporation that releases latent heat and I don't see what evaporates during a precipitation. What happens, though, is that during the day, the sun heats the earth and, at night, that heat radiates back into space. The balance of which is called, the sun's net radiation. It is positive (more gain than loss) during the summer and negative during the winter. This is why a clear sky means heat during the summer but the same means cold during the winter, hence an overcast day feels warmer in the winter, and ... it often is.
But we are perhaps mixing absolute and relative humidity. For example, at 0 C a cubic meter of air is saturated with 5 grams of water. When it happens, the relative humidity is 100 percent. But at 30 C, the same cubic meter can contain six times more, 30 grams of water. When it happens, the relative humidity is also 100 percent!
So if you take "dry" air of 30 C at 50 percent relative humidity, you actually have 15 grams of water per cubic meter of air. But the same "dry" air of 50 percent relative humidity will only contain 2.5 grams of water at 0 C.
So the higher the temperature, the greater the difference between moist and dry air. This is why we don't really feel much difference between low and high relative humidity when it is cold. Furthermore, since we tend to wear a lot of clothes when it is cold, the cooling effect of the evaporation of our sweat is not really a factor.
- Anonymous8 years ago
Air will seem colder if it is drier at cold temperatures. Precipitation tends to release heat which is why it sometimes seems a little warmer on calm snowy days. However, 1 degree centigrade may be too warm to notice this fact. Look at an advancing arctic air mass (The extreme case) and you will find that the air is so cold and dense that clouds very rarely form in such a way to create precipitation.
- henningLv 45 years ago
Truthfully, if it's the heating element, cost the section and a new dryer. Online I bought a great GE dryer that was brought to my house for $25 greater than the rate of the section. Known as a refurbishing appliance dealer and got $20 for the historical one.