GGR214H5 Lecture Notes - Lecture 4: Ideal Gas Law, Mixing Ratio, Vapor Pressure
Document Summary
Absolute and relative measures of humidity: there are two groups of measures for indicating the amount of water vapour in the atmosphere, absolute measures. Give the actual amount of water vapour in the air: relative measures. Compare the actual amount of water vapour in the air to the maximum amount possible (saturation value) Relative humidity (rh: relative humidity measures the proximity to saturation, ratio of water vapour to the saturation value (percentage, dependent on temperature and pressure as well as the amount of water in the air. Rh = relative humidity e = vapour pressure at air temperature (t) es= the saturated vapour pressure at air temp (t) Mississauga: ta = -11. 8 c, es = 0. 217 kpa, rh 64%, e = 0. 139 kpa. Resolute: ta = -35. 5 c, es = 0. 022 kpa, rh = 71%, e= 0. 016 kpa. Relative humidity is the amount of water vapor in the air relative to its saturation point (dimensionless ratio)
