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The Impact of Solar Variability on Climate
Joanna D. Haigh
New Series, Vol. 272, No. 5264 (May 17, 1996), pp. 981-984
Published by: American Association for the Advancement of Science
Stable URL: http://www.jstor.org/stable/2889581
Page Count: 4
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A general circulation model that simulated changes in solar irradiance and stratospheric ozone was used to investigate the response of the atmosphere to the 11-year solar activity cycle. At solar maximum, a warming of the summer stratosphere was found to strengthen easterly winds, which penetrated into the equatorial upper troposphere, causing poleward shifts in the positions of the subtropical westerly jets, broadening of the tropical Hadley circulations, and poleward shifts of the storm tracks. These effects are similar to, although generally smaller in magnitude than, those observed in nature. A simulation in which only solar irradiance was changed showed a much weaker response.
Science © 1996 American Association for the Advancement of Science