February 28, 2007
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Global Climate Change Digest
A Guide to Information on Greenhouse Gases and Ozone Depletion
Published July 1988 through June 1999
FROM VOLUME 9, NUMBER 6, JUNE 1996
CLIMATE CHANGE ASSESSMENT
1995: The [IPCC] Second Assessment Report Reviewed, April 1996, £5/$7.60
The IPCC assessment is a comprehensive review and a remarkable example of
international cooperation. However, its Summary for Policymakers obscures
the uncertainty underlying the assessment's finding of a "discernible human
influence on climate." The assessment generally understates the scope of
energy efficiency improvements and technical advances available, and does not
stress the need to institute these advances now. There is a risk that the
downward revision of the expected rise in global temperature due to cooling by
sulfate aerosols may prove unjustified.
State of the
Climate ReportA World in Perspective, P.J. Michaels, Ed., 28 pp., Apr.
1996, no charge (Western Fuels).
Contains contributions from five climatologists who use scientific arguments
to counter popular notions of climate change, and major conclusions of the IPCC
assessment. They show the lack of any trend in global temperature as measured by
satellites (R. Spencer), the lack of any detectable trend in mid-latitude storm
behavior (R. Davis), the poor performance of climate models in simulating
regional precipitation (D. Legates), and show that in many ways the gap between
the observed and simulated global temperatures is actually widening (R.
Activities Causing Global Warming?, 28 pp., no charge (Marshall Inst.).
Based on peer-reviewed studies of the past year. Although climate models
indicate that the average temperature of the Earth should have risen about 1°
C in the last 100 years in response to anthropogenic greenhouse gases, the
observed rise is about half that amount, most of which occurred before 1940 and
before most of the greenhouse gases entered the atmosphere. Anthropogenic
contributions can only account for at most a few tenths of a degree increase.
The suggestion that greenhouse warming will increase the severity and frequency
of violent storms has no foundation in fact.
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