Thanks, Colin. I'm well aware of the mini ice age from c.1100 AD to 1806 AD.Well... NASA have discounted the effect of Solar Cycles on climate trends.... Clickety Click
The Solar Maximumum/Minimum events you mentioned are magnetic activity, sunspots etc, not energy output.
Here's a suitable extract to summarise...
By and large, the space-based observations of the last 35 years have not recorded substantial changes in energy output from the Sun. Nonetheless, scientists include all the influences they can (including solar changes) when studying changes in climate. These estimates suggest that a small decrease in solar irradiance over the last 35 years would have caused a slight cooling of the climate over this time period – but only in the absence of other influences on Earth's climate.
The physics of the situation also doesn't back up the idea that changes in the Sun are a large force behind current climate change.
Oh, the "why" is very easy - this forum is an amalgam of various previous boards, so there's bound to be "redundancy"; I'll fix it - and this time, I'll leave the comments around for a spell; it pays to know a bit of historyI’m not sure how or why we have a second landscape thread, but congratulations on finding it!