humidity in viv explained

[rango87]

sorry if i sound dumb but i dont understand how humidity rises with cool mist or cold foggers??

why does the humidity stay up for longer in vivs at night when its colder?
i thought that more warmth created humidity?

as when you are outside the warmer it is the more humid it is and im not feeling any cool air.

 

[Ulrich]

Water evaporates faster in warm to hot climates. Cool rainforests are therefor much more humid than hot rainforests as the water droplets stay longer on plants or in the air. This explains higher humidity requirements for montane chameleons and less humidity for furcifer. Both are creatures of the rainforests. Similar rainfall. But much hotter in Madagascar than in the highlands of Tanzania.

 

[Decadancin]

Air can hold different amounts of water at different temperatures. As the air cools (assuming the same amount of water molecules are present) the saturation point of the air nears and reaches the "dew point". This is the reason for morning dew and sometimes fog. (Also sea fog as warm air blows over cooler waters and the air cools and reaches its saturation point.) So without adding more moisture at night, you can often get the same result as temps drop.

 

[Carlton]

sorry if i sound dumb but i dont understand how humidity rises with cool mist or cold foggers??

why does the humidity stay up for longer in vivs at night when its colder?
i thought that more warmth created humidity?

as when you are outside the warmer it is the more humid it is and im not feeling any cool air.

A couple other items to add to the other good answers:

Cool mist foggers are not really cold. They create fog by nebulizing (with super high vibration) water from a reservoir. As the reservoir sits at room temp, the fog isn't significantly colder than the room is.

Another reason the cage humidity tends to be higher at night is because there are no lights on...they tend to speed up water evaporation and cage drying.