But the solar cycle drives ENSO.
Here is what the Sun has been doing since the year 1610, modern warming was a direct result of solar activity and NOT the result of human activity. http://lasp.colorado.edu/lisird/tsi/hist...
But there is currently no warming of any kind, man-made or otherwise.
It's been cooling for at least 12 years.
http://www.woodfortrees.org/plot/hadcrut...
Top climate scientists say there is no man-made Global Warming.
The Great Global Warming Swindle
My first reaction was to say the Otto Cycle!
But you deserve a better answer than that. If by global warming you mean the warming caused by mankind, (most people's understanding of the term) then the answer is that there is no cycle. The warming is caused by the increasing concentration of greenhouse gasses as a result of our burning of fossil fuels.
Sure, natural cycles can have some effect, but they can not explain the observed rise in temperatures of recent decades.
If you want more information, this is a good place to start.
http://en.wikipedia.org/wiki/Global_warm...
The carbon cycle.
The climate change we're experiencing is not cyclic - it's a one-way trip lasting thousands of years that's inimical to life as we know it.
you can get right answer on internet....
