Transcript PowerPoint Radiation Budget

Sun
Earth
Sun: shortwave radiation
Earth: longwave radiation
Path of incoming solar radiation
30% of insolation
lost to space
20% of insolation
absorbed by atm
Only 50% of insolation
absorbed at surface
Albedo: a measure of how well a surface
reflects insolation.
Albedo measures (% reflected)
•
•
•
•
Fresh snow 80-95 %
Forests 10-20 %
Asphalt 5 to 10 %
Water bodies 10 to 60 % (depending on
sun angle)
• Light roof 35 to 50 %
• Dark roof 8 to 18 %
Latent heat fluxflux
The latent heat flux
values shown here is
the amount of energy
moving from the
surface to the air due
to evaporation.
Why is latent heat flux
less in the cities?
10. Heat is continually redistributed in the Earth’s
atmosphere via evaporation and condensation.
11. Ocean currents also redistribute heat