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PIRATA backbone + extensions. ifM - INPE. AX98. ATLAS buoy. IfM – SIO (Russia). AX18. GEF. GOOD HOPE + BONUS. Regions identified as important for implementing a South Atlantic observing system for climate.

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Regions identified as important for implementing a South Atlantic observing system for climate

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PIRATA backbone + extensions

ifM - INPE

AX98

ATLAS buoy

IfM – SIO (Russia)

AX18

GEF

GOOD HOPE + BONUS

Regions identified as important for implementing a South Atlantic observing system for climate

  • The light blue shading indicates the high eddy kinetic energy regions in the Brazil/Malvinas Confluence and the Agulhas Retroflection. Light orange shading indicate the regions of convection and subduction. Light green shading areas of upwelling associated to the shallow tropical cells. Red lines depict areas of interest for monitoring the inter-ocean exchanges and the bifurcation of the South Equatorial Current. Purple line near 30°S region for monitoring the meridional mass and heat flux


Primary production in the western South Atlantic

  • Recent changes in chl-a are among the largest observed (>50%, Gregg et al., 2005)

  • Primary production shelf break front 1.9 to 7.8 gC m2 d-1 (Garcia et al., in preparation)

  • F (CO2) = - 5.7 mmol CO2 m2 d-1(Bianchi et al., 2005)


ARGAU


- 5.7 mmol m-2 d-1

-30 matm

DpCO2

FCO2

Ocean productivity and CO2 fluxes

Chlorophyll-a


GEF PATAGONIA


Pre-deployment set-up


High resolution sampling mode


Swimmers


Estimates of South Atlantic Meridional Heat Flux


Estimates of South Atlantic Meridional Heat Flux


Lagrangian reconstruction of the global Thermohaline Circulation

Median pathways between successive oceanic sections crossed by water parcels. The colors indicate the mean depth of the transfer between two given sections. The North Atlantic overturning is defined here as the thermocline waters (in orange, red and pink) transformed into NADW (blue) in the North Atlantic sector. Numbers quantify the mass transfers between successive control sections (the Atlantic Equator, the Drake Passage, the SO section south of Australia and the Indonesian Throughflow).

Speich et al. 2007, submitted


Estimates of South Atlantic Meridional Heat Flux


High-resolution XBT line AX18 (14 sections)

Garzoli & Baringer 2007, submitted


Meridional heat flux – meridional structure

Integrated from 80ºN

Garzoli & Baringer 2007, submitted


Meridional heat flux – model comparisons

Integrated from 80ºN


Structure of meridional flow –

(some) error sources

“observed” thermal wind

Courtesy from Baher & Marotzke, in prep.


UPCOMING WORKSHOP

A monitoring system for heat and mass transports in the South Atlantic as a component of the Meridional Overturning Circulation

Estancia San Ceferino, Buenos Aires Argentina, May 8 - 10, 2007

To establish the feasibility of and to foster collaborations for a monitoring system for meridional heat and mass transports in the South Atlantic and inter-ocean exchanges as a component of the Meridional Overturning Circulation.

25 participants from:

South Africa

UK

Uruguay

USA

Argentina

Brazil

France

Germany

Russia


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