Transport of Poloidal Flux Along Subphotospheric Flux Ropes: Photospheric Signatures J. Chen and J. D. Huba Plasma Physics Division, NRL We consider the transport of poloidal (locally azimuthal) magnetic flux along a subphotospheric flux rope, which is anchored in the convection zone. We perform a 3-D MHD simulation, in which a straight cylinder is initialized using a number of different model flux ropes. The poloidal flux is increased by increasing the toroidal (axial) current at the lower footpoint, and the subsequent dynamics are studied. We discuss preliminary results with the emphasis on the expected observable signatures of the transport of poloidal flux or equivalently, magnetic helicity, across the photosphere. Work supported by ONR.