Hmm... However, see our posts on one potential mechanism
for solar forcing of climate.
I've seen predictions, based
on solar forcings, that the next 20 years or so will be somewhat of a cooling trend.
Because all of the above tricks work for
solar forcings as well as greenhouse gas forcings.
Our analysis shows that the most likely contribution
from solar forcing a global warming is 7 ± 1 % for the 20th Century, and is negligible for the warming since 1980.
Your reasoning is that the signal given by much warmer temperatures may not be attributable to CO2, and
only solar forcing generated this winter heat wave, rings wrong.
This question is addressed for suggested
solar forcing mechanisms operating on time scales from billions of years to decades.
Therefore, until new evidence becomes available, we are in a situation where different approaches and hypothesis yield different
solar forcing values.
In exactly the same way as on a daily basis the peak temp is in mid afternoon, & the
peak solar forcing is at noon.
I suspect the same analysis with the
same solar forcing calibration would find a substantially smaller contribution if brought up to date.
There is strong evidence that
excludes solar forcing, volcanoes and internal variability as the strongest drivers of warming since 1950.
It is thought that
solar forcings played a role, and low levels of volcanic activity may also have contributed.