Total radiative forcing (W m − 2) of the GCAM reference and RCP4.5 scenarios over the model simulation period
However, increasing atmospheric CO2 concentrations weakened this source function during
the simulation period.
2) Across the 40 year
simulation period, it seems that any effort to select cheap companies and eliminate the most expensive companies would have raised your expected return above what you might have achieved by equally weighting (or market cap weighting) your assets across the entire market.
Each effect is given in terms of its impact on the mean airborne fraction over
the simulation period (typically 1860 to 2100), with bars showing the uncertainty range based on the ranges of effective sensitivity parameters given in Tables 7.4 and 7.5.