Objectives of the Repeat Hydrography Effort

• Data for Model Calibration and Validation

• Carbon system studies:

  • Changes in anthropogenic carbon inventory

  • Transport of carbon, oxygen and nutrients       

  • Large scale natural and anthropogenic variability of biogeochemical properties 

• Heat and freshwater storage and flux studies:

  • Divergence of transport-surface fluxes

  • Transport of heat and salt

  • Storage of heat and freshwater

  • Globally changing inventories of heat and freshwater

• Deep and shallow water mass and ventilation studies:

  • Changes in subduction and formation rates

  • Effective spreading rates

  • Pathways of ventilation

  • Rates of dilution  

  • Water mass ages

• Calibration of autonomous sensors:

  • ARGO salinity sensors

  • Biogeochemical moorings and floats

  • Relationships between sensors and other properties