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Contributors: CLIVAR Section I6S

CLIVAR (Climate Variability) and Carbon Cycle Science Program Repeat Hydrography Section I6S (Indian Ocean #6 South) is an integrated approach to a global observational program for carbon, hydrographic and tracer measurements. The program is driven by the need to monitor the changing patterns of carbon dioxide (CO2) in the ocean and provide the necessary data to support continuing model development that will lead to improved forecasting skill for oceans and global climate.

There is broad consensus based on a variety of atmospheric, oceanic and modeling constraints that the ocean that the ocean took up 2.0 +/- 0.6 Gt carbon annually during the last decade. This is equivalent to 1-2 years uptake of anthropogenic carbon in surface waters. The total anthropogenic inventory of carbon in the ocean can be determined using concurrent, hydrographic, alkalinity, oxygen nutrient and tracer measurements. Utilizing transport estimates, the fluxes of carbon within and between oceans and ocean basins can be better constrained, particularly interhemispheric exchange of carbon through the ocean.

Funded by the National Science Foundation and the National Oceanic and Atmospheric Administration

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