1. Department of Geophysics; University of Concepcion; Concepcion Chile
2. Millennium Institute of Oceanography, University of Concepcion; Concepcion Chile
3. Laboratoire d'Études en Géophysique et Océanographie Spatiale, Université de Toulouse, CNES, CNRS, IRD, UPS; Toulouse France
4. LOCEAN/IRD/IPSL/UPMC; Paris France
5. International Pacific Research Center, School of Ocean and Earth Science and Technology; University of Hawaii at Manoa; Honolulu Hawaii USA
6. School of Earth and Atmospheric Sciences; Georgia Institute of Technology; Atlanta Georgia USA