# Greenhouse effect

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1. Earth's Global Average temperature
15 degrees celsius
2. Heat
measure of kinetic energy(bouncing around energy) of atoms
3. Heat transferred through
conduction, convection, and radiation.
4. Earth receives what percent of its energy from the sun
98.98%
5. How/where is solarg energy created
in the core of the sun, and through nuclear fusion.
6. How many million tons of H to He does our sun fuse
600 million tons
7. How many tons  is converted to energy
4 million
8. Newtons inverse square law:
• solar flux isinversely proportionalto the square of the distance from the sun.
•           As energy moves away from the sun, it is spread over a greater area.
9. Solar flux
amount of solar radiation at the top of the atmosphere

amount of energy per unit area.
self propagating waves that have electric and magnetic fields.
11. Electro magnetic radiation is induced by
acceleration of electrons
12. Frequency: f =
c/lamda
13. moves through vaccum at
speed of light
14. Electromagnetic spectrum
range of electromatic radiation.
15. Wien law
The peak electromagnetic radiation is inversely related to the temperature of a black body. A hot body will elecctromagnetic radiation at shorter wavelengths than cold one.  lamda_max = B/T
16. Stefan-Boltzmann Law... F is what?
The total energy emitted by an object is proportional to its temperature.

F = σT^4

F: energy flux
17. Plank's law
describes the thermal emission spectrum- the power per unit area emitted at each wavelength
assumes energy balance, incoming energy equals outgoing radiation.
19. what happens when incoming and outgoing radiation arent in balance
earths temp will rise or fall.
energy received from the sun

= SpiR^2
21. Albedo
reflectivity of a surface.

-some radiation is not absorbed usually expressed as a fraction of the total incident radiation.
22. Types / causes of albedo
• Clear sky albedo
• Total Sky albedo - actual observed albedo
• clouds contribute significantly to albedo.
23. Earth's radiative temperature
Incoming radiation = S(1-alpha)piR^2
• thermal radiation x outgoing area
• for thermal radiation use boltmann law
• outgoing area= spherical area.
25. earths radiative temperature = 255K
26. Greenhouse gas
atmospheric gas that absorbs in the long wave spectrum
27. Greenhouse effect
process by which radiation from earth's surface is absorbed by atmospheric gases then reemitted causing planetary warming.

atmosphere is almost transparent to solar radiation.
28. Major greenhouse gasses
water, carbon dioxide
29. Greenhouse effect big picture
exists because gasses are transparent to shortwave radiation, but absorb long wave radiation. it acts as a blanket insulating and warming the earth.
 Author: mabeog ID: 188300 Card Set: Greenhouse effect Updated: 2012-12-10 04:26:43 Tags: lecture greenhouse effect Folders: Description: lecture 2 Show Answers: