1. Department of Earth, Ocean and Atmospheric Sciences University of British Columbia Vancouver BC Canada
2. Institute of Applied Mathematics University of British Columbia Vancouver BC Canada
3. Now at Ocean Networks Canada Victoria BC Canada
4. Departamento de Física Facultad de Ciencias Universidad del Bío‐Bío Concepción Chile
5. Department of Physics and Astronomy School of Earth and Ocean Sciences University of Victoria Victoria BC Canada
6. Ocean and Ecosystem Sciences Division Bedford Institute of Oceanography, Fisheries and Oceans Canada Dartmouth NS Canada