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)