GEO 211 1st Edition Lecture 13 Outline of Last Lecture I Measuring Humidity A 3 types of humidity 1 Absolute humidity A H 2 Specific humidity S H and mixing ratio M R 3 Relative humidity R H B Absolute humidity C Specific humidity D Relative Humidity E Humidity instruments hygrometers 1 Hair hygrometer 2 Sling hygrometer measures R H and dew point Outline of Current Lecture II Chapter 5 Condensation A Fog is formed by 1 Cooling 2 Evaporation B Formed by cooling 3 types 1 Radiation fog formed by radiational cooling on clear calm nights also called ground fog Valley fog 2 Advection fog 3 Upslope fog C Formed by evaporation 1 Steam fog 2 Frontal precipitation fog Current Lecture II Chapter 5 Condensation Dew formed by radiation cooling on clear nights condense liquids on objects near the ground These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute Frost ice crystals formed by deposition also called hoarfrost exhibits ice crystal patterns Figure 5 2 Condensation nuclei tiny particles in the atmosphere where condensation begins A Fog is formed by 1 Cooling 2 Evaporation B Formed by cooling 3 types 1 Radiation fog formed by radiational cooling on clear calm nights also called ground fog Valley fog when nestled in valleys Valley fogs develop temporary temperature inversion Radiation fog dissipates few hours after sunrise Remnants at the fog resembles stratus cloud Does not cover very extensive areas 2 Advection fog formed when warm moist air is blown over a cooler surface and cooled to the dew point horizontal transfer by wind Ex warm moist air over snow surfaces or cool ocean currents In U S common along coast with cold currents Ex San Francisco bay Normally covers extreme areas and is thicker than radiation fog 3 Upslope fog forms when air rises and cools to saturation as it climbs over mountain slopes also called orographic fog Common along eastern slopes of the rocky mountains C Formed by evaporation 1 Steam fog forms when water evaporates from water surfaces and mix with drier air above causing saturation 2 Frontal precipitation fog forms on a warm front when raindrops evaporate as they fall into cooler air below
View Full Document
Unlocking...