2005 Salt Lake City Annual Meeting (October 16–19, 2005)

Paper No. 19
Presentation Time: 1:30 PM-5:30 PM


FRAPPIER, Amy, Climate Change Research Center, Univ of New Hampshire, Durham, NH 03824, a.frappier@unh.edu

Speleothems are rapidly becoming a valued multiproxy paleoenvironmental archive, in part because of their sensitivity to hydrologic and ecologic conditions above the cave site. We have previously developed a 23-year high-resolution stable isotope timeseries from a modern Belizean stalagmite from a cave overlain by mature semi-deciduous broadleaf tropical forest. This stalagmite record contains stable isotope signals corresponding to recent El Nino events and tropical cyclones. I now present the results of exploratory, high-resolution trace element and strontium isotope analysis. LA-ICP-MS trace element analysis was carried out at Boston University, and 87Sr/86Sr ratio determination was performed at Woods Hole Oceanographic Institution. At the millimeter scale, trace element concentrations vary with the visible stratigraphy. In addition, the high-resolution series reveals multiple event types with distinct chemical fingerprints. Together, stratigraphy, stable isotope values, trace element concentrations, and 87Sr/86Sr values constitute a rich multiproxy archive of past environmental changes that affected the cave-forest-soil system at decadal to sub-seasonal time scales.