Abstract

The time-averaged circulation in the western North Atlantic north of 30°N, west of 50°W is studied within the framework of a nonlinear finite-difference geostrophic inverse model. Hydrographic stations and long-term moored current meter records from the data set. Most current meter data are compatible with the geostrophic current vertical shear computed from hydrographic data. A circulation scheme derived using mass and potential density conservation constraints shows variations in the Gulf Stream transport with longitude, the result of interaction of the Gulf Stream with two recirculating gyres. A maximum Gulf Stream transport of 125 × 10 6 m 3 s −1 is reached at 59°W.

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