Yet, a new study from climate scientist Nicholas Lewis and science writer Marcel Crok reports that the IPCC hid certain findings related to climate sensitivity that challenge the IPCC's integrity. In addition, Lewis and Crok allege that the IPCC buried evidence concerning some good news about global warming.
Why is climate sensitivity important? Climate sensitivity measures the climate's response to increased greenhouse gases. Higher sensitivity means that continued or increased greenhouse gas emissions will increase global warning; lower sensitivity means that any future warming (and associated responses, such as sea level rise) will also be lower.
Assessing the IPCC report, Lewis and Crok's found:
- First: For three decades, IPCC assessments have provided no more than an uncertain range for climate sensitivity. This finding has been replicated by other climate scientists. The 2013 IPCC report contained no best estimate for climate sensitivity. This admission is found in a footnote in its Summary for Policymakers.
- Second: Recent studies indicate that climate sensitivity ranges from 1.5 degrees and 2 degrees Celsius, significantly lower than what previous studies indicated. However, the climate models the IPCC used rely on high climate sensitivities (2 degrees to 4.5 degrees Celsius) to project future climate change. Had the IPCC said that the best evidence is that sensitivity is only between 1.5 degrees and 2 degrees Celsius, it would have had to admit that many of its findings are not in based upon the most recent evidence. Instead, the IPCC extended the range, from 1.5 degrees to 4.5 degrees Celsius so that the findings fit the data.
- Third: Since the last IPCC report in 2007, greenhouse gas concentrations have risen. But, global temperatures have not. Concurrently, the estimates of the contribution of aerosols to global cooling have been reduced. However, the climate models do not take this new evidence about aerosols into account, thus increasing the probability of greater global warming due to human beings.
Lewis and Crok were diplomatic in their assessment of the IPCC's "climate model-oriented...process," stating that the 2013 report did not satisfactorily assess climate sensitivity, one of the most important elements of the climate change debate.
The Motley Monk doesn't have to be as diplomatic. The IPCC report is a "crock" as it's based on "scientists" who manipulated the model to fit the ideology of those who worship at the altar of environmentalism. The report's findings are based upon nothing other than fraudulent science.
Let the discussion begin...
To read the Lewis and Crok report, click on the following link:
"A Sensitive Matter: How The IPCC Buried Evidence Showing Good News About Global Warming."