Saharan and Arabian Dust Aerosols: A Comparative Case Study of Lidar Ratio Carmen Córdoba-Jabonero, Ismail Sabbah, Mar Sorribas, José Antonio Adame, Emilio Cuevas, Faisal Al Sharifi and Manuel Gil-Ojeda EPJ Web of Conferences, 119 (2016) 08002 Published online: 07 June 2016 DOI: 10.1051/epjconf/201611908002