GEOS 220 Lecture Notes - Lecture 6: Heat Exhaustion, Hygrometer, Headache
Document Summary
Pressure e(cid:454)erted (cid:271)(cid:455) (cid:449)ater (cid:448)apor (cid:373)ole(cid:272)ules i(cid:374) a(cid:374) air par(cid:272)el (cid:894)dalto(cid:374)"s la(cid:449) of partial pressure(cid:895) Actual vapor pressure: partial pressure of water vapor. Absolute humidity: mass of water vapor in a fixed volume of air. Specific humidity: mass of water vapor in a fixed total mass of air. Mixing ratio: mass of water vapor in a fixed mass of dry air. Actual vapor pressure: amount of h2o vapor in terms of pressure. Radio of h2o vapor in the air / max. amount of h2) required for saturation at a temperature. 50% rh contains one-half of the water vapor required for saturation. Greater than 100% rh is supersaturated air. Changed by h2) vapor content or temperature temperature increase with the same level of h2o vapor lowers rh. Temp. where air would have to be cooled (same pressure/moisture) for saturation to occur. Front point: dew point determined relative to flat surface of ice.
