1. Department of Physics; Universidad de Extremadura; Badajoz Spain
2. Department of Applied Physics; Universidad de Almería; Almería Spain
3. Departamento Física de la Tierra II; Universidad Complutense de Madrid; Madrid Spain
4. Department of Sedimentary Geology and Enviromental Change; Geosciences Institute IGEO (CISC-UCM); Madrid Spain
5. Department of Modern History; Universidad de Barcelona; Barcelona Spain
6. Catalan Institute of Climate Sciences (IC3); Barcelona Spain
7. Institute for Atmospheric and Climate Science, ETH Zurich; Zurich Switzerland
8. Department of Physics; Universidad de Girona; Girona Spain