The total anthropogenic ERF over the Industrial Era is 2.3 (1.1 to
3.3) W m
–2
.
It is certain that the total anthropogenic ERF is positive.Total anthropogenic ERF has increased more rapidly since 1970 than
during prior decades. The total anthropogenic ERF estimate for 2011 is
43% higher compared to the AR4 RF estimate for the year 2005 owing
to reductions in estimated forcing due to aerosols but also to continued
growth in greenhouse gas RF.
{8.5.1,
Figures
8.15,
8.16}
3