The nonlinear inertial terms have been neglected in Stommel's and in Munk's theory for the wind-driven ocean circulation. Using a method of successive approximations, the effect of these terms on the mass transport in the Gulf Stream region has been computed under greatly simplifying assumptions. These assumptions involve Reid's model of the vertical density structure, which consists of an exponential decrease in the density upward to the thermocline and a homogeneous upper layer....