GEOG 101 Lecture Notes - Lecture 6: Vp9, Cool Air, Evapotranspiration
Document Summary
Potential evapotranspiration-how much water could be converted vapor if water is not limiting. Actual evapotranspiration-the actual amount of water that is converted to vapor. Why are these two not the same ocean water content vs. desert water. Specific heat-1 calorie per gram per degree c . Temperature-water temperature, air temperature, and difference between the two. Humidity-of the overlying air-evaporation happens more rapidly into dry air. Vapor in air / how much it could hold) x 100 = rh. Air temp = dew point = saturated air. Specific humidity-mass of water vapor per total mass of air (g/kg) Absolute humidity-mass of water vapor per volume (g/m3) Vapor pressure-partial atmospheric pressure attributable to water vapor (millibars) Mixing ration-mass of water vapor per mass of dry air (g/kg) Dew point temperature-temperature when air becomes saturated. Sensible temperature-temperature perceived, not the thermometer temperature. Condensation nuclei-tiny particles that provide surfaces for water vapor to condense on.
