Trenberth on Tracking Earth’s energy: A key to climate variability and change
This is a serious analysis of the energy flows of the earth systems. You simply look at energy as a budget (but hopefully not with the same budget processes as many of the countries use like the PIIGS and the USA).
You have so much energy coming in. That energy is reflected and absorbed into the earth systems (oceans mainly).
The problem is that we are missing 60 * 10^20 Jules/year (or 6 * 10^22 J/y). Apparently Trenberth is in publication of an analysis of his explanation of this "residual", aka missing energy. We may not like where we find this missing link to our (in)balanced energy budget.