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Volume 3 Number 18:  16 August 2000

Editorial
Global Warming Acknowledgement Appropriate...Subsidiary Conclusions Still Flawed: We applaud Hansen and colleagues for their forthrightness in admitting that the global warming of the past century or so has not been driven by "the products of fossil fuel burning," but we take issue with their claim that this fact "does not alter the desirability of limiting CO2 emissions."

Subject Index Summaries
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Journal Reviews
Climate Models Not Up to Task of Resolving Cloud Microphysics Issues: Different parameterizations of cloud microphysical processes reveal that current climate models can, at best, make no more than qualitative assessments of surface air temperature response to atmospheric CO2 enrichment.

Marine Stratocumulus Clouds: Vexing Realities: A GCM study of the effects of marine stratocumulus clouds illustrates some important deficiencies in current climate modeling capabilities.

Then Again Rethinking Climate Change: A new assessment of radiative climate forcings since 1850 - led, in the words of the popular press, by "the scientist who alerted to the world to the consequences of the greenhouse effect" - concludes that whatever warming might have occurred over the last few decades "has been driven mainly by non-CO2 greenhouse gases not by the products of fossil fuel burning."

The Effects of Elevated CO2 on Growth and Flowering of Pansies: Elevated CO2 increased vegetative dry weight and flower size in yellow and primrose pansies.

Elevated CO2 Induces Biochemical and Anatomical Changes in Sorghum Leaves: Elevated CO2 reduced PEP carboxylase contents in leaves of sorghum, thus demonstrating that acclimation can occur in plants that use the C4 photosynthetic pathway for carbon fixation.