Interesting presentation containing info on Solar irradiance.

[Westbranch]

Prof. Dr. Vincent Courtillot Präsentation from France at the International Energy and Climate Conference in Germany Dec 2010
http://www.youtube.com/watch?feature=player_embedded&v=IG_7zK8ODGA

at about 15 minutes in he gets into the solar radiation part, very interesting.
enjoy
Eric

[laszlo]

Yep, this guy's research is quite fascinating. I admire his inetellectual honesty to recognize there are a lot of unknowns. A lot of the climate  warming is attributable to solar activity,  and in the last 10 year North America has actually been on a  cooling trend.