Theme 2 – Abiotic scavenging

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Presentation transcript:

Theme 2 – Abiotic scavenging Scoping the future

1. Short term – tools in hand Conceptual particle/TEI scavenging model synthesis (Fitzsimmons, Buck) and follow on testing candidate processes in models (various). Description of particle (and colloid) dynamics in the multi-element context. (Lam, Lerner, Wong, Fitzsimmons). Comparison of TEI Kd estimates and residence times (Hayes, Lam, Seth John) Ligand cycling and scavenging (Buck, Fitzsimmons, Eliot Sherman) Statistical meta-analysis (Plancherel) Characterizing strong ligands for Thorium (Hayes and Buck)

2. Medium term – Recommendations for remaining GEOTRACES Vitro-traces to get at Kds and other rate information for all the TEI’s (Seth John). Adding Optical techniques – Transmissometer, LISST, Underwater Visual Profiler, Optical image bank, etc. Slime characterization and dynamics Temporal and geographical variability of scavenging in nepheloid layers Temporal and geographical variability of scavenging by dust Characterization of preformed endmembers in/near water mass formation regions More use of existing time series stations (e.g. porcupine abyssal plain, BATS, PAPA(Line P)) as GEOTRACES sites

3. Long term – what comes after GEOTRACES? Ligands Repeat Geochemistry Organic GEOTRACES[Program] Biogeotraces [Program] Application of Satellite observations to TEI’s Mapping sediment TEI accumulation and sources Focus on pollutants [Program] Autonomous instruments [Program] Process studies (e.g. Microlayer, Photochemistry, Organic coatings)