2. JC068 – GA10W

3. D357 – GA10E

4. Mission GEOTRACES guiding mission “To identify processes and quantify fluxes that control the distributions of key trace elements and isotopes (TEIs) in the ocean, and to establish the sensitivity of these distributions to changing environmental conditions”

5. Mission GEOTRACES guiding mission “To identify processes and quantify fluxes that control the distributions of key trace elements and isotopes (TEIs) in the ocean, and to establish the sensitivity of these distributions to changing environmental conditions”

6. Mission What are the “key” elements? They include: Those acting as micronutrients to control ocean productivity and ecosystems Those tracing modern processes in the ocean Contaminants in the present and future ocean Chemical species used as proxies to reconstruct past climate

7. Examples of key measurements

8. Understand the geochemical processes and fluxes at the four ocean interfaces and during internal cycling to assess micronutrient cycles Interfaces and cycling

9. Mission An International Science Agenda GEOTRACES Atlantic Sections www.geotraces.org

12. AtlanticNitrate We will constrain the micronutrient fluxes and concentrations in the deep ocean, including in water masses with significant influence on the surface ocean 40S major objectives: deep-ocean supply to surface 40S

13. Outline of meeting Once I shut up (not just yet)…. Today: Distribution of elements Fluxes and inputs Tomorrow: Biological responses and tracers Intercalibration Other shore-based measurements Discussion issues (including data submission and timescales, publications, etc.)

14. test 1 2 3ss 4 5 6ss 7 8 (0.5) 9 (1.5) 10 (2.5) 12 (3.5) 11ss (4.5) 13 (0.75) First leg Second leg D357 stations

16. Surface T, S

17. D357: Temperature JC068: Temperature

18. D357: Salinity JC068: Salinity Data: Roulin Khondoker

19. D357: Temperature: Surface 500 m JC068: Temperature: Surface 500 m

20. D357: Salinity: Surface 500 m JC068: Salinity: Surface 500 m Data: Roulin Khondoker

21. D357: Oxygen JC068: Oxygen Data: Debbie Hembury

22. ARGO floats

26. Station 16 - mudwaves

28. www.ukgeotraces.com Login Username: geotraces Password: montevideo All the useful stuff is on the “restricted” page which you can then see