I like global warming, it allows farmers to grow crops further north and allows me to ride my motorcycle more months of the year. Here's a chart from the Royal Observatory of Belgium:
Note the fairly regular 11 year cycle. Note also a longer cycle somewhere in the 90 year range. I seem to remember that there are 3 cycles to this of differing lengths which sometimes add together and sometimes cancel each other out. Figure that out and you could become the next Pope Al and become fantastically rich selling snake oil.