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