[PapaBear3625]

Looking at the correlation between sunspot activity (which is a measure of solar magnetic field, which affects cosmic rays hitting earth) and climate, we see that the Dalton Minimum and Maunder Minimum coincided with colder weather:

Looking further, we can get a rough idea of cosmic ray bombardment by looking at variations of carbon-14 levels:

[agere_contra]

Thank you, that is a very useful graph.

[neverdem]

Thanks for the graphs!