Aerosol Optical Properties Above Opaque Water Clouds Derived From The Caliop Version 4 Level 1 DataZhaoyan Liu, David Winker, Ali Omar, Mark Vaughan, Jayanta Kar, Charles Trepte, Yongxiang Hu, Gregory Schuster and Stuart YoungEPJ Web of Conferences, 119 (2016) 04010DOI: https://doi.org/10.1051/epjconf/201611904010