JC068 – GA10W D357 – GA10E Mission GEOTRACES guiding mission “To identify processes and quantify fluxes that control the distributions of key trace.

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Presentation transcript:

JC068 – GA10W

D357 – GA10E

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”

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”

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

Examples of key measurements

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

Mission An International Science Agenda GEOTRACES Atlantic Sections

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

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.)

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

Surface T, S

D357: Temperature JC068: Temperature

D357: Salinity JC068: Salinity Data: Roulin Khondoker

D357: Temperature: Surface 500 m JC068: Temperature: Surface 500 m

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

D357: Oxygen JC068: Oxygen Data: Debbie Hembury

ARGO floats

Station 16 - mudwaves

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