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Science 9 April 1999:
Vol. 284. no. 5412, pp. 305 - 308
DOI: 10.1126/science.284.5412.305
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Reports

Solar Cycle Variability, Ozone, and Climate

Drew Shindell, 1* David Rind, 1 Nambeth Balachandran, 1 Judith Lean, 2 Patrick Lonergan 3

Results from a global climate model including an interactive parameterization of stratospheric chemistry show how upper stratospheric ozone changes may amplify observed, 11-year solar cycle irradiance changes to affect climate. In the model, circulation changes initially induced in the stratosphere subsequently penetrate into the troposphere, demonstrating the importance of the dynamical coupling between the stratosphere and troposphere. The model reproduces many observed 11-year oscillations, including the relatively long record of geopotential height variations; hence, it implies that these oscillations are likely driven, at least in part, by solar variability.

1 NASA Goddard Institute for Space Studies (GISS) and Center for Climate Systems Research, Columbia University, 2880 Broadway, New York, NY 10025, USA.
2 E. O. Hulburt Center for Space Research, Naval Research Laboratory, Washington, DC 20375, USA.
3 Space Science and Applications Inc., 2880 Broadway, New York, NY 10025, USA.
*   To whom correspondence should be addressed. E-mail: dshindell{at}giss.nasa.gov

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