Open ocean—environmental radiochemistry; trace metals; particle fluxes; organic biomarkers and the marine carbon cycle; marine photochemistry; biogeochemical models

Coastal ocean—groundwater and the coastal ocean; trace metals; environmental organic chemistry

At the ocean boundaries—air/sea interface; hydrothermal systems at the sea floor; marine sediments

Ocean through time—quaternary paleoceanography

Beyond the ocean—crust/mantle studies; hydrology; geomicrobiology