GEOTRACES mission is achieved through activities organized under three complementary themes:
Theme 1: Fluxes and processes at ocean interfaces
• Atmospheric deposition
• Continental run-off
• Exchange with sediments at the sea bed
• Exchange with sediments at the sea bed
Theme 2: Internal cycling
• Uptake/removal from surface waters
• Uptake/regeneration in the sub-surface ocean
• Seafloor regeneration
• Transport of TEIs by physical circulation
Theme 3: Development of proxies for past change
• Controls on water column distributions of proxies
• Uptake of proxies by sediment substrates
• Geochemical responses to sediment fluxes