I am not educated in this field, but anecdotally,  I believe it comes from the more energetic movement of the atmosphere drawing coldfronts down from the polar regions more frequently.<p>I also prefer to use the phrase &#x27;Global Weather Chaos&#x27; rather than &#x27;Global Warming&#x27;.  Much like I also prefer the term &#x27;Waste Reducing Reactor&#x27; to &#x27;Breeder&#x27;.