School of Physics, University of Costa Rica, 2060 Ciud. Rodrigo Facio, San Jose, 1000 Costa Rica ; Scripps Institution of Oceanography, 9500 Gilman Drive, La Jolla, CA 92093-0224 United States
Scripps Institution of Oceanography, 9500 Gilman Drive, La Jolla, CA 92093-0224 United States
Scripps Institution of Oceanography, 9500 Gilman Drive, La Jolla, CA 92093-0224 United States ; U. S. Geological Survey, 9500 Gilman Drive, La Jolla, CA 92093-0224 United States