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I made this chart a while ago.Ice Core temperatures (bottom) compared to inverted or negative magnetic field strength (top) (from Wikipedia).
Frethack, can you give us a link with some facts too?
By the way, when I asked about the radiation I really was thinking of the closest 250 years to us, as that is where we see a statistical anomaly appear, and accelerate, not seen before in Earths history.
Global warming today is a anomaly, not a phase we have found anywhere else in Earths history. That as I assume that this was what the thread was about? Treated otherwise it's not connected to the warming, instead becoming a question of geomagnetism. When it comes to the suns importance I would be surprised if it didn't play a role. But if you read Changing Sun, Changing Climate? you can see why it's only a very few scientists expecting it to be the sole culprit.
Why does the temperature curves just keep climbing?
...geomagnetic field strengthens/weakens. It could also be entirely coincidental. It would be good to know a little more about the data sets used to create these plots...resolution, dating methods, error, etc. Longer records would be great as well, but unfortunately, this is about as far back as decently resolved paleoclimate records can conceivably go.
I just stated that I could see no direct forcing or correlation between the sun and the temperature.