In 2006 I wrote about the Return of the Dalton Minimum in this paper: dalton_minimum
The main focus of the paper was on solar cycles that are about 200 +/- 10 year long. Below is a chart that compare the solar activity during the Maunder Minimum and Dalton Minimum and the current chain of cycles with a projection of future temperatures. We are continuing down the slope of cooling according to satellite temperatures shown HERE.
Source for the data is listed in the graphic. More in the Maunder Minimum in a future post.