PerspectiveSolar Physics

News from the Solar Interior

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Science  31 Mar 2000:
Vol. 287, Issue 5462, pp. 2434-2435
DOI: 10.1126/science.287.5462.2434

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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.