Executive editor of Scientific American magazine: "Scientists have concluded just recently that the link between climate change and extreme weather is not so much theoretical anymore as it is observational"

Global warming continues as greenhouse gas grows

"Scientists have concluded just recently that the link between climate change and extreme weather is not so much theoretical anymore as it is observational," Fred Guterl , executive editor of Scientific American magazine, said at that teleconference.

Which scientists? How, specifically, did they allegedly reach this conclusion?