What factore determines the dew point ?...?

Question

also ... ///will a change in air temperature also cause the dew point temperature to change?

Answer 1

dew point is a temperature where the relative humidity is 100 percent which means the vapor pressure of water vapor is at equilibrium with respect to water.

The dew point will not change unless water vapor is added to (evaporated into the air) or taken away (condensed out of the air).

Changing the temperature does not change the dew point unless the temperature is cooled below the dew point which would require condensation to take place which would take water vapor out of the air.

Answer 2

Dew point is affected only by the amount of moisture in the air.If you add moisture to the air ,the dew point will increase.But if the air temperature and dew point temperature are the same,adding moisture will result only in condensation of water vapour.So,If you want to increase the dew point temperature by inducting additional moisture,the air temperature should be sufficiently above the dew point temperature .Hence,even though increasing the air temperature will not affect the dew point ,it should be above the dew point in order to increase the dew point temperature.
Decreasing the air temperature below dew point will lead to condensation and both values may simultaneously decrease as dew point cannot be more than air temperature.

Answer 3

The temperature at which the relative humidity reaches 100 percent is called the dew point. The percent of saturation of air with water vapor is called relative humidity. The higher the temperature, the greater the amount of water vapor necessary to saturate the air.