Institution: | Earth Sciences, University of Bristol, Wills Mem. Bldg., Queen's Road, Bristol BS8 1RJ,;UK. E-mail: ICIST, Instituto Superior Tecnico, Av. Rovisco Pais, 1049-001;Lisbon, Portugal Instituto Nacional de Meteorologia e Geofísica, Sal, Cape Verde;Department of Physics, Instituto Superior Tecnico, Av. Rovisco Pais, 1049-001;Lisbon, Portugal |