1. Woods Hole Oceanographic Institution, Woods Hole, MA 02543
2. School of Earth and Ocean Sciences, University of Victoria, Victoria, British Columbia, V8W 3P6, Canada
3. Applied Physics Laboratory and School of Oceanography, University of Washington, Seattle, WA 98105
4. Grupo de Oceanografia, University of Lisbon, 1200 Lisbon, Portugal
5. Instituto Español Oceanografia, 28002 Madrid, Spain
6. AINCO-Inter-ocean, 28016 Madrid, Spain
7. Planning Systems Inc., McLean, VA 22102