EAPS 10200 Lecture Notes - Lecture 5: Dew Point, Fluid Parcel

• School: Purdue University
• Department: Earth Atmos Planetary Sci
• Course: EAPS 10200
• Professor: Professor Balloti

Document Summary

With relative humidity we hold temperature constant but change the amount of moisture. Relative humidity will change over the course of the day simply because the temperature changes. Dew point temp we hold the amount of moisture constant and change the temperature. Plentiful water vapor in the air, but the temp. drops in the evening, too much water vapor in the air reaches 100% humidity it is called the dew point temperature. The excess water vapor condenses and can form clouds or fog if it close to the ground. Air can also cool by rising vertically in the atmosphere. Atmosphere naturally cools as you move above the surface. Rate at which this occurs, or the adiabatic cooling rate is 10-degree c per. Refers to the cooling of gas as it expands without adding or subtracting heat from the surrounding environment. When a warm, moist air parcel starts to rise and cools to it"s dew point temperature.