This study once again counters "climate skeptics'" argument of warm and cold cycles in the medieval ages that are used by those persons to argue against the science of human made global warming/climate change.
here you can access the preview of the full paper:
On a side note:
On the northern hemisphere heatwaves seem to fluctuate over the Atlantic.. so after some very very hot weeks end of June / start of July in Europe the US experienced a severe heat wave and now its back in Europe again...
.. of course only random unconnected incidents... ;-)
Stay cool and go Solar!