Wow! I'm impressed at the work put into this wiki page for Toroidal Inductors and Transformers. Nice pictures and diagrams.
I was looking for info on circumferential current. Before finding, I didn't know it had a name. Just thought electrons going in a circle.
Among all the other loops on a toroid there's that other loop. If I understand correctly, that other loop puts out a B field. The core doesn't confine it. There are two B fields with a toroid. One in the core from winding on the core and the other in space from the circumferential current.