@Dave - yes, the Sulfate curve is interesting.
My daughter Max now has a BSc (Chem) so I'll ask her about the Sulfate. Speaking with her I understand that the science behind global warming is universally accepted and taught in the Monash Uni Science Faculty.
Max doesn't agree with me about much, but she also feels the climate change skeptics have no credibility.
Climate Change is an important and interesting area. It needs to be approached using scientific disciplines, relying on referenced and peer-reviewed material.
Anecdotes and unsubstantiated conspiracy theories add nothing to this kind of science.
The graph does show a strong correlation between modeled and observed data.
The Greenhouse Gas curve also seems to correlate with rising temperatures since 1950, which is what is expected.
When I get some more time I'll fish around for a good set of data for your question.