The “Maunder minimum” is a fancy-pants sciency phrase for a little ice age. A little ice age is a long period of weird weather where it mostly just gets colder for longer over a series of consecutive decades. These events are predicated on oscillations of total solar radiance, and solar or sunspot activity, which can be plotted, measured, and used to predict long term effects on climate based on previous solar activity in relation to recorded historical temperatures, observations, ice-core data–you know sciency stuff.
We’ve recently left one of those very active solar periods (when it got warmer), which even the scientists who write at Wikipedia refer to as a solar maximum. During the solar maximum, there was a lot of solar activity and the globe got warmer. After solar maximums you get the opposite, according to the science, which suggests a long period of colder temperatures–and more of those Polar vortex thingies.




