1. National Center of the Environment; Avenida Larraín 9975, CP: 7880096, La Reina, Santiago Chile
2. Now at Department of Atmospheric and Oceanic Sciences, 405 Hilgard Avenue; University of California; Los Angeles CA 90095-1565 USA
3. Department of Geophysics; University of Chile; Santiago Chile
4. Center for Climate and Resilience Research; Santiago Chile
5. Centre for Environmental Sciences; University of Chile; Santiago Chile