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Climate Change Reconsidered
2009 Report of the
Nongovernmental International Panel on Climate Change (NIPCC)
Craig Idso, Fred Singer et al.
A new 880-page account of climate change science, similar in scope to the science volume of
IPCC’s 4th Assessment Report, has just been released. The Report includes summary discussion
of relevant and recent scientific publications. NIPCC has been written by an international team of
32 expert scientists from 16 countries, who are independent of political or other allegiances.
The report rigorously analyses the IPCC’s claim that dangerous global warming has “very likely”
been caused by human greenhouse emissions. Instead of accepting the flawed null hypothesis that
observed environmental changes are due to human influence, and citing circumstantial evidence
in favour of it, the NIPCC report provides tests for the parsimonious null hypothesis that observed
climate changes are natural unless and until evidence to the contrary emerges.
Twenty years have elapsed since the formation of the IPCC, yet, despite the expenditure of many
tens of billions of dollars and the efforts of hundreds of committed scientists since then, the
research summarized in the 4AR IPCC and NIPCC reports provides no evidence that falsifies the
null hypothesis of natural climate change.
In his comments at the NIPCC report’s launch, Fred Singer (University of Virginia) commented
about global warming that “there is no scientific consensus: the science is not settled”.
The new report shows that the IPCC has failed to provide any empirical evidence that shows that
dangerous human-caused global warming is occurring. In particular:
The 20th century was not the warmest in the last 1,000 years;
No evidence exists that any measurable amount of the rise in global temperature
over the last 50 years is a result of human influence;
Current rates of ice/glacier melt are not unusual;
Current weather (including tropical storms, droughts and floods) is not unusual;
Current sea-level change is occurring at rates typical of recent times;
No correlation has been demonstrated between increasing atmospheric carbon
dioxide and dangerous temperature rise.
The NIPCC report is available for purchase or free download, at