Here's a study that suggests El Nino is responsible for most
of the global warming that has occurred since the late 1970's:

http://tinyurl.com/lzdxh8
Research links climate change patterns to El Nino

excerpts:

"most of the late 20th century global warming and cooling can be 
attributed to natural climate processes."

"The close relationship between the Southern Oscillation and
mean global temperature, as described in the paper, 
suggests future global temperatures will continue to 
change primarily in response to ENSO cycling, volcanic
activity and solar changes," Prof. Carter said.

"Our paper confirms what many scientists already know: 
which is that no scientific justification exists for emissions 
regulation, and that, irrespective of the severity of the 
cuts proposed, an emissions trading scheme will exert 
no measurable effect on future climate." 

Here is the actual Journal publication:
http://www.agu.org/pubs/crossref/2009/2008JD011637.shtml

Paul Cherubini
El Dorado, Calif.

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