jc068 ga10w d357 ga10e mission geotraces guiding mission to identify processes and quantify fluxes...

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 InternationalScience Agenda

GEOTRACES Atlantic Sections

www.geotraces.org

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 elementsFluxes and inputs

Tomorrow:Biological responses and tracersIntercalibrationOther shore-based measurementsDiscussion issues (including data submission and timescales, publications, etc.)

test1

2

3ss

4

56ss7

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

www.ukgeotraces.com

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