[ChessExpert]

For one thing, the norther hemisphere land temperature covers less than a quarter of the globe and isn't the key measure.

Do we have a better measure of temperature change? How do other measures of temperature relate to the solar cycle?

correlation doesn't prove causation

True, but it is a strong hint. That solar activity would cause warming on earth at least makes sense.

it doesn't look at other factors

I will agree with you here, mostly because you presented other information in post 25.

One nice thing about the N.O.A.A. data is its long time span. And the chart in post 25 is definitely cyclical. So what are the causes of the cycles? For all I know, it might be caused by changing orbits, as indicated in your link to orbital variance. But I can’t rule out solar activity or other causes either. The chart definitely busts the “man made” aspect of the theory of global warming.

[gondramB]

>The chart definitely busts the “man made” aspect of the theory of global warming.<

No one chart is gonna make or bust the man-made aspect of global warming - its complex.

For example there was a flat spot in temperatures between 1945-1976 that human casuists don't like to talk about.

But there are CO2 core ice measures that correlate over the long run (10,000 years +) than any other single factor.

Its complicated and my horse is the race is try to suggest conservatives
1. Acknowledge that global temperature has gone up a degree this century and that lately the increase has accelerated
2. But focus on "why" rather than "if."

The likely "why" is gonna be a complex blend of factors and too little study is going into determining how much of this is within our control - its too much "us vs. them."