Atmospheric CO2 measurements with a 2-μm DIAL instrument Erwan Cadiou, Jean-Baptiste Dherbecourt, Guillaume Gorju, Jean-Michel Melkonian, Antoine Godard, Jacques Pelon and Myriam Raybaut EPJ Web Conf., 176 (2018) 05045 Published online: 13 April 2018 DOI: 10.1051/epjconf/201817605045