Open-system coral ages reveal persistent suborbital sea-level cycles

Publication Type  Journal Article
Year of Publication  2005
Authors  Thompson, W. G.; Goldstein, S. L.
Journal Title  Science
Volume  308
Issue  5720
Pages  401-404
Journal Date  Apr 15
ISBN Number  0036-8075
Accession Number  ISI:000228492000049
Key Words  last interglacial period; glacial cycle; penultimate deglaciation; huon peninsula; termination-ii; north-atlantic; reef terraces; ice ages; climate; temperature

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.


917TLTimes Cited:43Cited References Count:45

URL  <Go to ISI>://000228492000049
DOI  DOI 10.1126/science.1104035