Enhancements to the caliop aerosol subtyping and lidar ratio selection algorithms for level II version 4 A. Omar, J. Tackett, M-H. Kim, M. Vaughan, J. Kar, C. Trepte and D. Winker EPJ Web Conf., 176 (2018) 02006 Published online: 13 April 2018 DOI: 10.1051/epjconf/201817602006