ESS200A
Prof. Jin-Yi Yu
Energy Emitted from Earth
§ The Stefan-Boltzmann Law
The
energy flux emitted by a blackbody
is related to the fourth power of the
body’s
absolute temperature
F = sT4 where s is
5.67x10-8 W/m2/K
§ Energy emitted from the Earth
=
(blackbody emission) x (total area of Earth)
= (sTe4 ) x
(4p R2Earth )
(from The
Earth System)
absolute
temperature