Nonlin. Processes Geophys., 24, 89-99, 2017
© Author(s) 2017. This work is distributed
under the Creative Commons Attribution 3.0 License.
barrierswhose locations are determined by the local advection velocity field. The gates
opendue to suitable dispositions of mesoscale eddies facilitating propagation of subtropical waters to the north. It is documented for the western, central and eastern gates with the help of different kinds of Lagrangian maps and verified by some tracks of available drifters. The transport through the gates occurs by a portion-like manner, i.e. subtropical tracers pass the gates in specific places and during specific time intervals. There are some
forbiddenzones in the frontal area where the northward transport has not been observed during all the observation period. They exist due to long-term peculiarities of the advection velocity field.