Intan Suci Nurhati, Ph.D.
│ Paleoclimate & environment research
└ Indonesian Corals & Trees - SE Asia - Tropical Pacific - Kuwait └ Line Islands - Kelimutu
PI: Ed Boyle (MIT)
We reconstruct coral-based histories of Pb (lead), Pb isotopes, and Cd to assess the signatures of local sources and distal transport of anthropogenic metals in our nearby oceans, via a suite of living and fossil corals from Singapore and offshore sites in the central and eastern Indian Ocean (Fig.1-left). Previous works in the Atlantic Ocean show the fidelity of coral Pb and Pb isotope measurements to monitor the changing levels and sources of leaded-gasoline consumption in the U.S. and Europe (Fig.1-right). But how about marine Pb in our region that phased out leaded-gasoline consumption in recent years? To refine our understanding of past and present changes of anthropogenic Pb in the region, we complement our coral records with continuous Pb measurements in aerosol and seawater from Singapore.
Figure 1: (Left) The study sites. (Right) Atlantic coral Pb records. Kelly et al. (2009).
Corals in a Changing Environment
The ecologically diverse coral reefs of Singapore and SE Asia experience increased environmental stresses over the past decades. We also utilize our coral collections to reconstruct changes in land-use change such as sedimentation (via coral Ba/Ca) and nutrient sources (via nitrogen isotopes). Here we are not only interested in how the environment has changed as reflected in coral skeletal geochemistry, but also understanding long-term impacts of the changing environment on corals.
Working with: Jani Tanzil (NTU), Jong-Mi Lee and Rick Kayser (MIT), and Branwen Williams (Claremont College)