While all the researchers agreed with the Intergovernmental Panel on Climate Change (IPCC) statement that “warming of the climate system is unequivocal”, four of the five disagreed with the claim that the primary cause of the increase was due to anthropogenic emissions of greenhouse gases. The only researcher to agree with the IPCC’s assertion was Emori, who is himself a member of the IPCC.
Akasofu countered with the statement, “CO2 emissions have been increasing, but the rise in air temperature stopped around 2001. Climate change is due in large part to naturally occurring oscillations”. Akasofu says the earth’s warming trend began prior to the industrial age, and believes much of the warming seen may simply be a natural recovery from the so-called Little Ice Age, that ended in the 17th century.
Professor Itoh attacked the temperature record itself, saying “Data taken by the U.S. is inadequate. We only have satellite data of global temperatures from 1979 onwards”. Itoh, who has previously called global warming “the worst scientific scandal in history”, is also an expert reviewer for the IPCC.
Dr. Kasano believes that cosmic rays, which are modulated by cycles in the strength of the sun’s magnetic fields, may potentially have large-scale impacts on the earth’s climate.
The report includes the data in which the researchers base their arguments, and can be publicly viewed (in Japanese) on the Internet.