Observations and modelling of the solar and terrestrial radiative effects of Saharan dust: a radiative closure case-study over oceans during the GERBILS campaign - Haywood,JM; Johnson,BT; Osborne,SR; Mulcahy,J; Brooks,ME; Harrison,MAJ; Milton,SF; Brindley,HE (QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY, 2011)