In regions where surface ocean CO2 concentration is less than the atmosphere, the ocean functions as a net sink for atmospheric carbon. How strong is this sink and what determines it?
Dr. Jesse Vance has published one of his thesis chapters where a 20 year shipboard time series of pCO2 is combined with satellite and ocean model data to show that advection of gradients by ocean currents contributes significantly to the seasonal to decadal time scale of variability in the strength of this sink. Click this link for the full article.
Seasick Suanda 