1. Departamento de Geofísica y Meteorología, Universidad Complutense de Madrid, and Instituto de Ciencias Matemáticas, CSIC-UAM-UC3M-UCM, Madrid, Spain
2. Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, Los Angeles, California
3. Instituto de Ciencias Matemáticas, CSIC-UAM-UC3M-UCM, Madrid, Spain
4. Departamento de Geofísica y Meteorología, Universidad Complutense de Madrid, Madrid, Spain
5. Department of Atmospheric and Oceanic Science, Center for Scientific Computation and Mathematical Modeling, and Earth System Science Interdisciplinary Center, Institute for Physical Science and Technology, University of Maryland, College Park, College Park, Maryland