1. Department of Ocean Sciences, University of California, Santa Cruz, Santa Cruz, California 95064, United States
2. Escuela de Ciencias del Mar, Facultad de Ciencias del Mar y Geografıá, Pontifica Universidad Catoĺica de Valparaíso, Valparaíso 2950 Chile
3. Instituto Milenio de Oceanografía, Casilla 1313, Concepción, Chile
4. NASA Goddard Institute for Space Studies, New York City, New York 10025, United States
5. Departments of Biological Sciences and Earth Sciences, University of Southern California, Los Angeles, California 90089, United States
6. College of Marine Science, University of South Florida, St. Petersburg, Florida 33701, United States