To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie S1. Material advection of the closed Agulhas ring boundaries, identified at time t0 as outermost closed diffusion barriers. Superimposed is the diffusing concentration. Material barriers to diffusive and stochastic transport George Haller, Daniel Karrasch, and Florian Kogelbauer PNAS. 2018. 115:9074-9079 DOI: 10.1073/pnas.1720177115 Download Original Video Browse All Videos »