Lidar Based Separation of Polluted Dust Observed Over Warsaw (Case Study on 09 August 2013) Dominika Szczepanik, Eleni Tetoni, Dongxiang Wang and Iwona S. Stachlewska EPJ Web Conf., 237 (2020) 02018 Published online: 07 July 2020 DOI: 10.1051/epjconf/202023702018