what causes temperature declines in solar minimums?

Ok, so I looked at the sunspot data from ice cores, now lets consider the data for beyllium 10

 ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/grip/cosmoiso/grip_10be.txt

or as an excel file

ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/grip/cosmoiso/grip_10be.xls

According to http://wattsupwiththat.com/2009/03/17/beryllium-10-and-climate/

beryllium 10 is a marker of solar activity





[




and overlap the sunspot data




and look at this paper

http://cc.oulu.fi/~usoskin/personal/aah4688.pdf

I'd like someone to do a similar analysis of the data as Basil's and mine . One could look at sulphate levels too, there is a nagging in the back of my head that volcanic activity is a factor which cant be ignored here.

and compare with