Observations of the impact of a major Saharan dust storm on the atmospheric radiation balance - Slingo,A; Ackerman,TP; Allan,RP; Kassianov,EI; McFarlane,SA; Robinson,GJ; Barnard,JC; Miller,MA; Harries,JE; Russell,JE; Dewitte,S (GEOPHYSICAL RESEARCH LETTERS, 2006)