Solar Energy and Heating the Atmosphere. Radiation Energy comes from the sun as radiant energy...
-
Upload
bethany-cobb -
Category
Documents
-
view
215 -
download
0
Transcript of Solar Energy and Heating the Atmosphere. Radiation Energy comes from the sun as radiant energy...
Solar Energy and Heating the Atmosphere
Radiation
Energy comes from the sun as radiant energy
Radiation from the Sun can be visible (light) or invisible (infrared, UV, etc.)
Radiation
Radiation – energy that travels as waves or rays through space between objects and materials
ex. Sun radiates energy to Earth Campfire radiates energy to your hands
Radiation
When radiant energy strikes a molecule in sand, soil, water, or air, the molecule gains energy and begins to move faster.
In other words, the molecule absorbed radiant energy.
HeatWhile Temperature is a measure of the average kinetic energy of the molecules in a sample of matter, Heat is the sum of all the energy from the molecules in a sample of matter.For example, while a candle flame and bonfire have the same temperature, the bonfire creates more heat because more molecules are moving!
Differential Heating
Differential Heating – different materials heat up at different rates
For example, this accounts for the difference in temperature of water and soil after they have both been in the lamp light for the same length of time.
Conduction
Conduction – energy transfer between molecules when they come in contact with each other
Convection
Convection – transfer of energy from one place to another in a gas or liquid via a current
Putting it all Together
How does energy transfer via radiation, conduction, and convection heat the atmosphere?
Radiation, Conduction, & Convection
Energy Transfer
Re-radiation
Heating the Atmosphere
1. Radiation from Sun absorbed by surface
2a. Surface reradiates energy to the air2b. Surface conducts energy to air molecules
3. Air molecules conduct energy to other air molecules, resulting in convection currents