Acknowledgements ONR, NSF, and DOE (CCPP Program) Computer time: Department of Defense High Performance Computing Modernization Office Grand Challenge Grant. Sites: Army Research Laboratory (ARL) and Arctic Region Supercomputing Center (ARSC). Also Advanced Computer Laboratory at Los Alamos National Laboratory. Drifter data from AOML/NOAA. The authors also thank all those involved in the collection of drifter data in the North Atlantic and in the Nordic Seas. Thanks to Peter Niiler for stimulating this research. Pam Posey (NRL) provided the NOGAPS wind fields. Peter Braccio (NPS) made the SSHA movie.