the global heat budget is the usable energy maintained by the earth as a ballance between energy recieved by the planet and that is radiated back into space
Insolation
the earth recieved its energy as incoming short wave solar radiation
insolation moved downwards through the atmosphere
Albedo effect
the 31% of insolation the is reflected back to space
clouds are highly reflective as the water acts as tiny mirrors
sun is mostly reflected from earth because of snow, ice and deserts