Nature not man responsible for recent global warming.Three Australasian researchers have shown that natural forces are the dominant influence on climate, in a study just published in the highly-regarded Journal of Geophysical Research. According to this study little or none of the late 20th century global warming and cooling can be attributed to human activity.
The research, by Chris de Freitas, a climate scientist at the University of Auckland in New Zealand, John McLean (Melbourne) and Bob Carter (James Cook University), finds that the El Niño-Southern Oscillation (ENSO) is a key indicator of global atmospheric temperatures seven months later. As an additional influence, intermittent volcanic activity injects cooling aerosols into the atmosphere and produces significant cooling.
“The surge in global temperatures since 1977 can be attributed to a 1976 climate shift in the Pacific Ocean that made warming El Niño conditions more likely than they were over the previous 30 years and cooling La Niña conditions less likely” says corresponding author de Freitas.
“We have shown that internal global climate-system variability accounts for at least 80% of the observed global climate variation over the past half-century. It may even be more if the period of influence of major volcanoes can be more clearly identified and the corresponding data excluded from the analysis.”
There are some valuable sources to build your understanding of current climate science:
880 page summary of climate science:
http://www.nipccreport.org/
Scientific discussion of data by Climatologist and Meteorologist can be found at Anthony Watts:
http://wattsupwiththat.com/
Senate Committee on Environment and Public Works, Minority Page
http://epw.senate.gov/public/index.cfm?FuseAction=Minority.WelcomeMessage
Comment by Climate Chaos — July 24, 2009 @ 8:38 pm