GEOG 111 1st Edition Lecture 7 Outline of Last Lecture I Energy Transfer a Radiation transfer b Heat transfer c Energy imbalances and energy transfer Outline of Current Lecture I Heat transfer a Sensible heat flux b Latent heat flux Current Lecture I Heat Transfer a Always occurs when there is a temperature difference across a medium b The rate of heat transfer is related to the temperature difference i The greater the difference the more rapidly the temperatures will equalize out warmer cooler ii Example January Heat flux a The ocean s surface is warmer than atmosphere so the sensible heat flux is very high 2 Why are heat fluxes high off of the North American and Asian coasts a Prevailing winds go west to east cold air masses develop over the land and moves across the water b Gulf stream c Two types of heat transfer i Sensible heat flux the rate at which heat that can be sensed moves from one place to another 1 Heat flux quantity of heat moved across a unit area per unit time e g watts m 2 a Contributing processes i Conduction molecule by molecule heat transfer 1 Thermal conductivity the ease with which heat conducts through a material 2 Copper has very high thermal conductivity while air does not ii Convection heat movement through bodily movement warmer moves upward 1 Example Air moving from warmer to cooler 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 2 Example The Hadley Cell lots of convection in the equatorial region generated by differences in temperature 3 Example boiling water Warmer water at the bottom of the pan convects upward to heat the cooler water 4 Example Cumulus clouds iii Advection horizontal movement of heat through wind circulation or ocean currents 1 Example southerly winds advect warm air northward ii Latent heat flux heat movements through phase changes in water 1 Example in the process of evaporation heat goes into a latent or hidden form as it is absorbed and creates a cooling effect a Sensible heat evaporation water vapor latent energy that rises condensation heat is released cloud sensible heat b Net movement of sensible heat from surface up into a cloud c Evaporation produces a cooling sensible heat being converted to latent heat
View Full Document
Unlocking...