My current research involves the reconstruction of paleoceanographic parameters such as sea-surface temperature and salinity over the Holocene utilizing planktic foraminifera in marine sediment cores. Comprehensive observations of climatic fluctuations (temperature, salinity, precipitation etc.) in the ocean and atmosphere have only been measured (with varying degrees of quality) for the last ~150 years, a mere geological instant. In order to understand the variability of climate over large timescales and different forcings, the aid of natural recorders (which are preserved in time) is required. I utilize stable isotopes and trace metal ratios locked in the calcite shells of the foraminifera to catch a glimpse of the climatic and oceanic conditions when they lived. My field area is the northern Gulf of Mexico. I am also interested in statistically quantifying uncertainties in paleoceanographic/paleoclimatic proxies. How can we best listen to what the proxies (foraminifera, corals etc.) are telling us?
Another line of research that I am actively involved in is coral paleogeodesy with Fred Taylor. I am interested in deformation patterns of the land on short time scales and the earthquakes through which they are manifest. To discover how the land was moving hundreds of years ago, I turn to corals which carry a detailed year-by-year record of sea-level. Dating and mapping fossil corals can give us precise information about the earthquake cycle. For my current project, I work in the Western Province of the Solomon Islands in the South Pacific.
Current Research ProjectsSurface ocean variability in the northern Gulf of Mexico during the Holocene ( view ) The late Holocene earthquake cycle as revealed by corals in the island of Ranongga, Western Solomon Islands ( view )
Indian Academy of Sciences Summer Research Fellowship - Indian Academy of Sciences (2009)