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Science 31 March 2000:
Vol. 287. no. 5462, pp. 2434 - 2435
DOI: 10.1126/science.287.5462.2434
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Perspectives

Also see the archival list of Science's Compass: Enhanced Perspectives

SOLAR PHYSICS:
Enhanced: News from the Solar Interior

Douglas Gough

The solar magnetic field changes dramatically over a 22-year cycle, and the root for these changes is believed to lie in a thin layer in the solar interior, called the tachocline. In this Perspective, Gough et al. discusses the implications of the surprising observation of periodic 1.3- and 1.0-year oscillations at the tachocline (Howe et al.). The results, which cannot be explained with current theories, show that the solar interior is dynamically more active than previously assumed.

The author is at the Institute of Astronomy, Madingley Road, Cambridge, CB3 0HA, UK. E-mail: douglas{at}ast.cam.ac.uk

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Science. ISSN 0036-8075 (print), 1095-9203 (online)