Could you resort to MORE name-calling SoCalPete? I can play that game too: You're a f***ing idiot, Pete.
Oreskes’ essay is now outdated. Since it was published, more than 8,000 further
papers on climate change have been published in the learned journals. In these
papers, there is a discernible and accelerating trend away from unanimity even on her
limited definition of “consensus”.
Schulte (2007: submitted) has brought Oreskes’ essay up to date by examining the 539
abstracts found using her search phrase “global climate change” between 2004 (her
search had ended in 2003) and mid-February 2007. Even if Oreskes’ commentary in
Science were true, the “consensus” has moved very considerably away from the
unanimity she says she found.
Dr. Schulte’s results show that about 1.5% of the papers (just 9 out of 539) explicitly
endorse the “consensus”, even in the limited sense defined by Oreskes. Though Oreskes
found that 75% of the papers she reviewed explicitly or implicitly endorsed the
“consensus”, Dr. Schulte’s review of subsequent papers shows that fewer than half now
give some degree of endorsement to the “consensus”. The abstract of his paper is worth
quoting in full:
“Fear of anthropogenic ‘global warming’ can adversely affect patients’
well-being. Accordingly, the state of the scientific consensus about
climate change was studied by a review of the 539 papers on “global
climate change” found on the Web of Science database from January 2004
to mid-February 2007, updating research by Oreskes (2004), who had
reported that between 1993 and 2003 none of 928 scientific papers on
“global climate change” had rejected the consensus that more than half of
the warming of the past 50 years was likely to have been anthropogenic. In
the present review, 32 papers (6% of the sample) explicitly or implicitly
reject the consensus. Though Oreskes said that 75% of the papers in her
sample endorsed the consensus, fewer than half now endorse it. Only 7%
do so explicitly. Only one paper refers to “catastrophic” climate change,
but without offering evidence. There appears to be little evidence in the
learned journals to justify the climate-change alarm that now harms
patients.”
Schulte’s table of results is also worthy of reproduction –
____________________
______________________________________________________________________________
Abstracts on ISI Web of Science Oreskes (2004) Schulte’s review
Period under review: 1993 to 2003 2004 to 2007
Quantity of documents reviewed: 928 documents 539 papers
Mean annual publication rate: 84.3 documents.yr –1 254.6 (+201%)
Explicit endorsement of the consensus: Not stated 7% (38 papers)
Explicit or implicit endorsement: 75% 45% (244 papers)
Explicit rejection of the consensus 0% 1.3% (7 papers)
Explicit or implicit rejection: 0% 6% (32 papers)
New data / observations on climate change: Not stated 24% (127 papers)
New research on the consensus question: Not stated 2% (13 papers)
Quantitative evidence for the consensus: Not stated 0% (no papers)
Mention of “catastrophic” climate change: Not stated 0% (one paper)
______________________________________________________________________________
____________________
Unlike Oreskes, who does not quote even one of the 928 papers upon which her analysis
was based, Schulte cites some of the counter-consensual papers from his sample –
Cao et al. (2005) point out that, without the ability to quantify variations in the terrestrial
carbon sink both regionally and over time, climate projections are unreliable –
“To predict global climate change and to implement the Kyoto Protocol
for stabilizing atmospheric greenhouse gases concentrations require
quantifying spatio-temporal variations in the terrestrial carbon sink
accurately. During the past decade multi-scale ecological experiment and
observation networks have been established using various new
technologies (e.g. controlled environmental facilities, eddy covariance
techniques and quantitative remote sensing), and have obtained a large
amount of data about terrestrial ecosystem carbon cycle. However,
uncertainties in the magnitude and spatio-temporal variations of the
terrestrial carbon sink and in understanding the underlying mechanisms
have not been reduced significantly.”
Gerhard (2004), discussing the conflict between observation, theory, and politics, says –
“Debate over whether human activity causes Earth climate change
obscures the immensity of the dynamic systems that create and maintain
climate on the planet. Anthropocentric debate leads people to believe that
they can alter these planetary dynamic systems to prevent what they
perceive as negative climate impacts on human civilization. Although
politicians offer simplistic remedies, such as the Kyoto Protocol, global
climate continues to change naturally.”
Leiserowitz (2005) reports –
“results from a national study (2003) that examined the risk perceptions
and connotative meanings of global warming in the American mind and
found that Americans perceived climate change as a moderate risk that
will predominantly impact geographically and temporally distant people
and places. This research also identified several distinct interpretive
communities, including naysayers and alarmists, with widely divergent
perceptions of climate change risks. Thus, ‘dangerous’ climate change is a
concept contested not only among scientists and policymakers, but among
the American public as well.”
Lai et al. (2005) offer an entirely new hypothesis to explain recent warming of the
climate –
“The impacts of global warming on the environment, economy and society
are presently receiving much attention by the international community.
However, the extent to which anthropogenic factors are the main cause of
global warming, is still being debated. … This research invokes some new
concepts: (i) certain biochemical processes which strongly interact with
geophysical processes in climate system: (ii) a hypothesis that internal
processes in the oceans rather than in the atmosphere are at the center of
global warming; (iii) chemical energy stored in biochemical processes call
significantly affect ocean dynamics and therefore the climate system.
Based on those concepts, we propose a new hypothesis for global
warming.”
Moser (2005) explores the assessment of rising sea levels and in state-level managerial
and policy responses to climate change impacts such as sea-level rise in three US states –
“Uncertainties in the human dimensions of global change deeply affect the
assessment and responses to climate change impacts such as sea-level
rise.”
Shaviv (2006) considers the cosmic-ray forcing posited by Svensmark et al. (2006), and
concludes that, if the effect is real, natural climate variability rather than anthropogenic
enhancement of the greenhouse effect has contributed more than half of the warming
over the past century – “The cosmic-ray forcing / climate link … implies that the increased solar
luminosity and reduced cosmic-ray forcing over the previous century
should have contributed a warming of ~0.47K, while the rest should be
mainly attributed to anthropogenic causes.”
Zhen-Shan and Xian (2007) say that CO2 forcing contributes less to temperature change
than natural climate variability, that the anthropogenic enhancement of the greenhouse
effect –
“could have been excessively exaggerated” … Therefore, if CO2
concentration remains constant at present, the CO2 greenhouse effect will
be deficient in counterchecking the natural cooling of global climate in the
following 20 years. Even though the CO2 greenhouse effect on global
climate change is unsuspicious, it could have been excessively
exaggerated. It is high time to re-consider the trend of global climate
changes.”
Whatever “unanimity” may have been thought or claimed to exist before 2004 in the
peer-reviewed literature, there is certainly none in the peer-reviewed journals that have
been published since.
Is there a scientific “consensus” wider than that defined by Oreskes?
e have established that Oreskes’ essay does not really lend any scientific
credibility to the panicky predictions of a small minority of scientists many of
whom have Left-leaning political opinions or connections.
The outright scaremongers are led by James Hansen, a donor of thousands of dollars to
the re-election campaigns of Al Gore and John Kerry. He showed Congress a graph in
1988 that set the trend for wildly-exaggerated projections of future global temperature.
The graph presented three scenarios, the most extreme of which had no basis in the
scientific literature or in previously-observed trends.
Politicians at that time treated the graph with respect because it had been generated by a
computer. Yet the model which generated the graph, still in use by Hansen and the UN
today, continues to contain “flux adjustments” – i.e. fudge-factors – many times greater
than the very small perturbations which the model is supposed to predicting.
Hansen’s model is discredited by the observed temperatures since 1988 –
Hansen’s graph, updated to depict observed temperature to end 2006 overlaid in red,
shows that the temperature trend projected by the GISS model used by Hansen is nearidentical
to that which the model had projected on the assumption that atmospheric CO2
concentrations had been substantially reduced from 1989 onward and stabilized by 2000.
On this evidence (and this is the evidence that launched the “global warming” scare), it
would be legitimate to conclude that the additional CO2 that has entered the atmosphere
since Hansen’s graph was published has had no climatic influence whatsoever.
Yet Hansen’s computer model, and others very like it, are the chief reason offered by the
alarmists for claiming a “consensus” for an extreme version of climate change that even
goes so far as to predict the eventual eradication of more than half the world’s species
(State of the Wild:
http://www.giss.nasa.gov/~jhansen/preprints/Wild.070410.pdf
).
This broader and more frankly alarmist definition of “consensus” that is presented by
Hansen, Al Gore, and the BBC has even less warrant in the peer-reviewed literature than
the “consensus” to the effect that humankind has caused most of the slight warming of
the past half-century. On this definition of “consensus”, we are led to believe that all
serious scientists are agreed on the imminence of catastrophe and on the urgent need for,
and the likely effectiveness of, costly and extreme mitigative or remedial measures.
It is crucial to appreciate that Oreskes’ paper does not lend any scientific credibility to the
alarmists’ extreme views on climate change. The more honest among them recognize
how careful she was to constrain the scope of her definition so that at least it bore some
relation, however threadbare, to the peer-reviewed literature that she had analyzed. The
alarmists, therefore, now find themselves compelled to fall back upon some additional
mantras which, if recited often enough, come to seem true.
“2,500 scientists can’t be wrong”
First among these is that the UN’s latest report on climate change (IPCC, 2007) was
written by 2,500 scientists – and “2,500 scientists can’t be wrong”. In fact, however,
the scientific chapters were contributed by a far smaller number than this. Furthermore,
we are now able to offer proof that the UN cannot have obtained the approval of as many
as 2,500 scientists to the text before it was published.