Jump to: Page Content, Section Navigation, Site Navigation, Site Search, Account Information, or Site Tools.
|
|
ReportsOpen-System Coral Ages Reveal Persistent Suborbital Sea-Level Cycles![]()
Sea level is a sensitive index of global climate that has been linked to Earth's orbital variations, with a minimum periodicity of about 21,000 years. Although there is ample evidence for climate oscillations that are too frequent to be explained by orbital forcing, suborbital-frequency sea-level change has been difficult to resolve, primarily because of problems with uranium/thorium coral dating. Here we use a new approach that corrects coral ages for the frequently observed open-system behavior of uranium-series nuclides, substantially improving the resolution of sea-level reconstruction. This curve reveals persistent sea-level oscillations that are too frequent to be explained exclusively by orbital forcing. Lamont-Doherty Earth Observatory (LDEO) and Department of Earth and Environmental Sciences, Columbia University, Palisades, NY 10964, USA. * Present address: Department of Geology and Geophysics, 118 Clark Lab, Mail Stop 23, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA.
The editors suggest the following Related Resources on Science sites:In Science Magazine
THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
|