Unit Affiliation: Geochemistry, Lamont-Doherty Earth Observatory (LDEO)
In this project, a research team at the Lamont-Dougherty Earth Observatory of Columbia University will measure water column concentrations of 239Pu, 240Pu, 237Np, and 137Cs in dissolved and particulate phases along the 2013 US GEOTRACES Pacific zonal section from Peru to Tahiti. For much of the study region, these will be baseline vertical profiles of these radionuclides; that is, very few (if any) data on their distribution are currently available. These same anthropogenic radionuclides will also be measured in surface sediments at a few selected sites. Where possible, the team will compare the 2013 data to measurements made in 1972-1973, thus obtaining a four-decade perspective on processes controlling the distribution and fate of these substances.
This project will feature international collaboration with other marine radiochemists. It will also include agressive educational outreach to undergraduate and high school students to advance public understanding of environmental radioactivity.
3He Measurements During the Southern Ocean Gas Exchange Project
Collaborative Research: GEOTRACES Pacifice Section: Nd isotopes and REEs in the South Pacific
Collaborative Research: US GEOTRACES Pacific Section: Analysis of 230Th, 232Th and 231Pa
Dense Water Formation and Overturning in the Red Sea: A Proposal to Collect Anthropogenic Tracer Observations