>> More than a dozen theories have now been proposed for the so-called global warming hiatus, ranging from air pollution to volcanoes to sunspots.
>> “Every week there’s a new explanation of the hiatus,” said corresponding author Ka-Kit Tung
First of all, a hypothesis is NOT a theory. Secondly, they have a goal indicative of an agenda - they're looking for a plausible explanation and publishing speculation as "theory". If you don't have data you're just speculating, and by data I don't mean "yeah, volcanoes erupt and emit stuff". You need data that supports your hypothesis, and if you really want to claim a theory, IMHO you need some kind of mathematical model. If all these weekly explanations had data and models to back them, I don't think there would be nearly so many.
To me this resembles the folks who blame every weather event on climate change. Even if I accept the premise, they look like fools trying to tie warm, cold, erratic, extreme, and calm, all to the the same cause with nothing but simple high level hand waving.
Never mind my views on certain topics, doesn't all that speculation out in the public view damage the perception of science as a whole? That bothers me.