Sherwood B. Idso, 2001. "Carbon-Dioxide-Induced Global Warming: A Skeptic’s View of Potential Climate Change", Geological Perspectives of Global Climate Change, Lee C. Gerhard, William E. Harrison, Bernold M. Hanson
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Over the course of the past two decades, I have analyzed a number of natural phenomena that reveal how earth’s near-surface air temperature responds to surface radiative perturbations. These studies all suggest that a 300 to 600 parts per million (ppm) doubling of the atmosphere’s carbon dioxide (CO2) concentration could raise the planet’s mean surface air temperature by only about 0.4°C. Even this modicum of warming may never be realized, however, for it could be negated by a number of planetary cooling forces that are intensified by warmer temperatures and by the strengthening of biological processes that are enhanced by the same rise in atmospheric CO2 concentration that drives the warming. Several of these cooling forces have individually been estimated to be of equivalent magnitude, but of opposite sign, to the typically predicted greenhouse effect of a doubling of the air’s CO2 content, which suggests to me that little net temperature change will ultimately result from the ongoing buildup of CO2 in earth’s atmosphere. Consequently, I am skeptical of the predictions of significant CO2-induced global warming that are being made by state-of-the-art climate models and believe that much more work on a wide variety of research fronts will be required to properly resolve the issue.
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Geological Perspectives of Global Climate Change
Access A Broad Range of Paleoclimatic Studies. Current debates regarding potential man-induced modification of climate make this volume especially timely. Introductory sections address the major and minor physical controls, or drivers, that affect Earth's climate. Several chapters describe the naturally occurring range of variation of climatic conditions and illustrate past changes in global temperatures. Case studies show how ancient temperature conditions are determined, as well as new techniques that have significant potential as proxies for assessing paleoclimates. Several chapters demonstrate the magnitude and length of duration of numerous temperature variations, which occurred during geologic time periods.