[RWebb]

It is demonstrably not just part of the Earth's cycles - scientists have shown that very clearly.

A simple way to think about this particular event, is that humans have put more energy into the atmosphere, and that energy will "come out" is some sort of storm. Beyond that, you would need to run a regional climate model that is linked to a global model - NCAR has some...

The real serious regional cooling would be a very cold Europe. The mechanism is as follows:
1. warming melts Arctic ice sheets
2. fresh water from that runs southward (lots of it)
3. that fresh water interrupts the Atlantic Conveyer System (part of which Americans call "the Gulf Stream")
4. Europe then no longer gets that input of warm water to warm its climate
5. the result would be similar to a little ice age in Europe - massive crop failures, widespread disease outbreaks, refugees and more fun stuff

BTW, climate change has 3 different components, which is why we distinguish it from global warming

the other two are ocean acidification (I hope you don't like seafood), and the favoring of certain types of plants over others due to the higher CO2 in the air (e.g. juniper trees spreading all over former sagebrush areas in the Great Basin)