Earth's Energy Budget

"Energy is the ability to do work". It is a standard definition of energy. We need to use the energy reach the earth and change it as we need to further uses.
As we believe that the Energy mostly comes from outside of the eart we should consider to "Earth's energy budget".
As a rough estimation about the Earth mean energy balance following figure can be used, it is not very exact and some of data may be uncertain by as much as 20%. But it is still useful for us to have an approximation about the Energy can reach the earth surface.
Recently many studies carried out by environmental related scientists and the investigated about the factors affect the Climate changes, for me as a person who wants to make an approximation about the energy reach the surface some parts of these researches may be useful more.
As I discussed in last post the short wave and long wave Solar radiation flux of energy is constrained by top layers of atmosphere. Partitioning of the radiative energy throughout the atmosphere is achieved through the use of detailed radiation models for both the long wave and shortwave spectral regions.

As you can see in the above Figure, total rate of energy leaves Earth is equal to the 342 W/m2 which is equal of incident sunlight! Thus Earth is in approximate energy balance in this figure. (Although we knew that earth absorb some energy, it means that these approximations are not complete)

Numbers are in watts per square meter of Earth's surface. In other way we can describe it as :

Solar radiation is scattered and reflected by the atmosphere, clouds, and earth's surface, creating an average albedo of 31%.

Atmospheric gases and clouds absorb another 20 units, leaving 49 units of shortwave absorbed by the earth's surface.

## Earth's energy balance (The Encyclopedia of Earth)
http://www.eoearth.org/article/Earth

##Solar Radiation and the Earth's Energy Balance

## Inside the Solar-Hydrogen House (Scientific American)

## Facing the Hard Truths about Energy