Scientists from the University of Alabama in Huntsville, using data collected by sensors aboard NOAA and NASA satellites, have determined the Earth has warmed less than one half of one degree Celsius over the past 30 years.  Dr John Christy, a professor of atmospheric science and director of the Earth System Science Centre (ESSC) had this to say about the findings:

If you look at the 30-year graph of month-to-month temperature anomalies, the most obvious feature is the series of warmer than normal months that followed the major El Nino Pacific Ocean warming event of 1997-1998.  Right now we are coming out of one La Nina Pacific Ocean cooling event and we might be heading into another. It should be interesting over the next several years to see whether the post La Nina climate ‘re-sets’ to the cooler seasonal norms we saw before 1997 or the warmer levels seen since then.

I doubt they will be discussing this in Poznan.  Click here for more information about Dr. Christy’s findings.