CO2 profiling in the lower troposphere using the Raman lidar technique: Preliminary results

Marco Di Paolantonio; Davide Dionisi; Annalisa Di Bernardino; Tatiana Di Iorio; Noemi Franco; Giovanni Giuliano; Anna Maria Iannarelli; Gian Luigi Liberti; Donato Summa; Paolo Di Girolamo

doi:10.1051/epjconf/202636209012

Open Access

Issue		EPJ Web Conf. Volume 362, 2026 31^st International Laser Radar Conference (ILRC 31) Held Together with the 22^nd Coherent Laser Radar Conference (CLRC 22)


Article Number		09012
Number of page(s)		4
Section		Lidar Measurements of Trace Gases (including Greenhouse Gases and Water Vapour)
DOI		https://doi.org/10.1051/epjconf/202636209012
Published online		09 April 2026

EPJ Web of Conferences 362, 09012 (2026)
https://doi.org/10.1051/epjconf/202636209012

CO₂ profiling in the lower troposphere using the Raman lidar technique: Preliminary results

Marco Di Paolantonio^(a)^,(b), Davide Dionisi^(b), Annalisa Di Bernardino^(c), Tatiana Di Iorio^(d), Noemi Franco^(a), Giovanni Giuliano^(b), Anna Maria Iannarelli^(e), Gian Luigi Liberti^(b), Donato Summa^(a)^,(f) and Paolo Di Girolamo^(a)

^(a) School of Engineering, University of Basilicata, 85100 Potenza, Italy
^(b) Institute of Marine Sciences, Italian National Research Council (ISMAR-CNR), 00133 Rome, Italy
^(c) Sapienza - University of Rome, 00185 Rome, Italy
^(d) Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), 00196 Rome, Italy
^(e) Serco Italia SpA, 00044 Frascati (Rome), Italy
^(f) Institute of Methodologies for Environmental Analysis, Italian National Research Council (IMAA-CNR), 85050 Tito Scalo (Potenza), Italy This email address is being protected from spambots. You need JavaScript enabled to view it.

Published online: 9 April 2026

Abstract

Measurements of CO₂ vertical profiles in the lower troposphere are of great importance for climate research and monitoring, in particular for carbon sources and sinks characterization. In the present work we illustrate CO₂ mixing ratio measurements carried out by the Raman lidar system CONCERNING (COmpact RamaN lidar for Atmospheric CO₂ and ThERmodyNamic ProfilING). The calibration method adopted takes advantage of the lidar background signal, proportional to the zenithal sky radiance. Measurements for a specific case study are illustrated and discussed. The obtained profile is compared with satellite data from an OCO-2 overpass showing a good level of agreement (within one standard deviation).

This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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