text: Presented by Sheldon Bacon, National Oceanography Centre, UK, at the ESA-CliC Earth Observation and Arctic Science Priorities Meeting, Norway, 2015
  Considering the Arctic Ocean (including sea ice) as a defined volume, we develop equations describing the time-varying fluxes of mass and freshwater into, and storage of those quantities within, that volume. Fluxes and storage of mass and freshwater are illustrated using output from a numerical model. Initial validation of the approach using in situ and remote-sensed measurements is described.