Is this the report referred to?
"Reconciling anthropogenic climate change with observed temperature 1998–2008"
wattsupwiththat.files.wordpress.com/2011/07/pnas-201102467.pdf or another
"Results
Increasing emissions and concentrations of carbon dioxide receive
considerable attention, but our analyses identify an important
change in another pathway for anthropogenic climate change
—a rapid rise in anthropogenic sulfur emissions driven by large
increases in coal consumption in Asia in general, and China in
particular. Chinese coal consumption more than doubles in the
4 y from 2003 to 2007 (the previous doubling takes 22 y, 1980–
2002). In this four year period, Chinese coal consumption
accounts for 77% of the 26% rise in global coal consumption (8).
These increases are large relative to previous growth rates. For
example, global coal consumption increases only 27% in the
twenty two years between 1980 and 2002 (8). Because of the resultant
increase in anthropogenic sulfur emissions, there is a
0.06 W∕m2 (absolute) increase in their cooling effect since 2002
(Fig. 1). This increase partly reverses a period of declining sulfur
emissions that had a warming effect of 0.19 W∕m2 between 1990
and 2002.
The increase in sulfur emissions slows the increase in radiative
forcing due to rising greenhouse gas concentrations (Fig. 1).
Net anthropogenic forcing rises 0.13 W∕m2 between 2002 and
2007, which is smaller than the 0.24 W∕m2 rise between 1997
and 2002. The smaller net increase in anthropogenic forcing is
accompanied by a 0.18 W∕m2 decline in solar insolation caused
by the declining phase of the eleven year solar cycle, such that the
sum of modeled forcings increases little after 1998 and declines
after 2002 (Fig. 1). This cooling effect is amplified by a net
increase in the Southern Oscillation Index (SOI) (9).
The effect of changes in anthropogenic and natural forcings
on global surface temperature after 1998 is assessed with a statistical
model that is estimated with a sample that ends in 1998.
As indicated in Fig. 2, the model simulation for global surface
temperature is consistent with observations. In short, net forcing
does not rise between 1999 and 2008, nor does global surface
temperature. The hypothesis that the post 1998 period is consistent
with the existing understanding of anthropogenic climate
change is evaluated with a test statistic that evaluates the null
hypothesis that the long-run relationship between global surface
temperature and radiative forcing is unchanged after 1998. We
fail to reject this null in two of three sample periods analyzed
(SI Appendix: Table S3 and Section 2.3)."
StuartG