A recent paper presented at the European Geosciences Union meeting finds global warming over past century was only about one-half [0.42°C] of that claimed by the IPCC [0.7-0.8°C]. The paper finds that in 2/3 (67%) of the weather stations examined, questionable adjustments were made to raw data that resulted in “increased positive trends, decreased negative trends, or changed negative trends to positive,” whereas “the expected proportions would be 1/2 (50%).” According to the authors,
“homogenation practices [adjustments to raw data] used until today are mainly statistical, not well justified by experiments, and are rarely supported by metadata. It can be argued that they often lead to false results: natural features of hydroclimatic times series are regarded as errors and are adjusted.”
“While homogenation is expected to increase or decrease the existing multiyear trends in equal proportions, the fact is that in 2/3 of the cases the trends increased after homogenation”
“The above results cast some doubts in the use of homogenation procedures and tend to indicate that the global temperature increase during the last century is smaller than 0.7-0.8°C”
selected slides below, full presentation available here:
I think a lot of us here at FA have been critizing the IPCC AGW. Climate Gate and the “hide the decline gang” failure to prove their theories should have tipped off the more intelligent folks amoung us!
@Randy:
Should have? I think it has, Randy. The ones who don’t understand, or rather, will not understand, are those who live on the smug emanating from liberal/progressive fantasy land. Since they choose not to accept factual information that contradicts Al Gore’s sermons, they will never understand why we say that they ‘defend the indefensible’ when it comes to AGW.
I’m increasingly seeing more scientific reports that say the earth is cooling, and has been for a good while due to lowered levels of solar flare activity.
Blog: Science Solar Activity Diminishes; Researchers Predict Another Ice Age http://www.dailytech.com/Solar+Activity+Diminishes+Researchers+Predict+Another+Ice+Age/article10630.htm
Climate in Northern Europe Reconstructed for the Past 2,000 Years: Cooling Trend Calculated Precisely for the First Time http://www.sciencedaily.com/releases/2012/07/120709092606.htm
I think the opinions here are driven more by politics rather the scientific inquiry. Like opinions about Justice Roberts have changed among ultra-conservatives since his decision on the PPACA—based solely on the fact that it was not consistent with their opinion—similarly hypothesis of global warming or cooling are accepted based on political position, without regard for the evidence.
@Liberal1 (objectivity): WOuld you recognize evidence if you fell over it? We at FA have referenced studies showing that the computer models are not science and that the AGW claims are not valid. Now, the IPCC even admits they were wrong.