Developing a Climatology of Cirrus Lidar Ratios Using Univeristy of Wisconsin HSRL Observations Ralph Kuehn, Robert Holz, Edwin Eloranta, Mark Vaughan and Johnathan Hair EPJ Web of Conferences, 119 (2016) 16009 Published online: 07 June 2016 DOI: 10.1051/epjconf/201611916009