ENVIRSC 1A03 Lecture Notes - Lecture 2: Fluid Parcel, Humidity, Supersaturation
7 Feb 2015
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Document Summary
Amount of water vapor in the air. Warmer air can hold more moisture than colder air. Actual quantity of water vapor in the air. Sh = mass of water vapour (g)/ mass of total air (kg) Max amount of water vapor that an air parcel can contain at any given time. Density of a gas cannot be increased above a certain level. Change of phase once limit is reached. What happens when two bodies of air with different temperature and moisture characteristics mix together? the resulting air will have temperature and sh that is the average of the two. For saturationg and mixing of air graph, anything under the curve is unsaturated, anything above is supersaturated and condensation takes place. Temperature at which air, when cooled, becomes saturated. Warm air + cold air = condensation. Amount of water vapor present compare to max water vapor at that temp. Rh = 100 x (sh/ saturation sh)
