how does it relate to the vapor pressure/saturated vapor pressure and the atmospheric pressure? can someone plz give me a really *simple* explanation?
2007-06-13 22:46:34 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Weather
Simply, the dew point temperature is the temperature where the atmosphere becomes saturated and condensation begins. When you hit the dew point, the relative humidity is 100%, and the amount of water in the atmosphere (the mixing ratio) is equal to the maximum amount of water the air can hold(the saturation point) It is not necessarily tied to pressure.
2007-06-14 00:14:38 · answer #1 · answered by James M 6 · 0⤊ 1⤋
Dewpoint temperature is the temperature at which the air reaches 100% humidity and is therfore saturated. It is related to a mixing ratio value. The mixing ratio is the amount of water in grams evaporated into each kilogram of air. The vapor pressure is the partial pressure of water vapor in the atmosphere. In other words, if you were to only have water vapor in the atmosphere, the pressure it would have in that situation would be the partial pressure. If there is a higher dewpoint tempurature, then there is more vapor in the atmosphere, and the vapor pressure rises.
Saturated vapor pressure can't really be explained simply. It is when the water vapor and liquid water are at equilibrium and the pressure is of the vapor. If the dewpoint temperature is raised, and therefore water content is increased, then the saturated vapor pressure goes up.
Atmospheric pressure relates to this becuase if the saturated vapor pressure is at atmospheric pressure, then the water boils.
2007-06-14 04:07:32 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Dew point is defined as the temperature at which air would become saturated if it were cooled sufficiently,a further lowering of this temperature being responsible for spontaneous condensation.In other words the dew point of air is the temperature for which the saturation vapour pressure is identical with the actual pressure of the vapour in the air.
Therefore , for a saturated air, the air is actually at its dew point,othrwise, the dew point is always below the air temperature(in case of unsaturated air).
2007-06-16 07:21:16 · answer #3 · answered by Arasan 7 · 0⤊ 0⤋
It is the temp of the precipitation in the air. The other questions will vary depending on the conditions. Any atmospheric pressure correlates to the barometric pressure at a given location.
2007-06-13 22:52:48 · answer #4 · answered by progroundshaker 1 · 0⤊ 1⤋