Lord Lawson's skeptic lobby group, the Global Warming Policy
Foundation (GWPF), released a report today criticising scientists'
estimate of how sensitive earth's climate is to carbon dioxide.
In what may be a sign of growing confidence in the scientific
community about engaging online, climate scientists have been quick
to respond, highlighting what they label the report's "cherry
They have also pointed out Lawson's lobby group appears to have
unwittingly come out in support of the mainstream scientific view -
that we can expect a serious level of warming if emissions aren't
brought down swiftly.
report, entitled 'Oversensitive: How the IPCC hid good the news
on global warming", argues the UN's official climate body glossed
over the possibility of modest future warming in its
latest assessment, in favour of evidence that the risks
could be much higher.
Authored by former financier Nic Lewis, who describes himself as
an "independent climate scientist", and freelance science writer
Marcel Crok, the report claims to provide a "technically sound" and
"independent" assessment of the IPCC's conclusions.
But climate scientists strongly disagree, today pointing
out issues with the analysis.
A matter of sensitivity
The new GWPF report centres on something called climate
sensitivity - the warming we can expect when carbon dioxide
concentration reaches double what it was in preindustrial
In its most recent report, the IPCC estimated we're likely to
see between one and 2.5 degrees Celsius at the point of doubling.
This is what's known as the Transient Climate Sensitivity (