EGU General Assembly 2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

A Broadband Cavity-Enhanced Absorption Spectrometer for Simultaneous measurements of NO2 and particulate matter

Weidong Chen1, Gaoxuan Wang1, Lingshuo Meng1, Qian Gou2, Benjamin Hanoune3, Suzanne Crumeyrolle4, Thomas Fagniez1, Cécile Coeur1, and Rony Akiki5
Weidong Chen et al.
  • 1Université du Littoral Côte d'Opale, LPCA, Dunkerque, France (
  • 2School of Chemistry and Chemical Engineering, Chongqing University, Daxuecheng South Rd. 55, 401331 Chongqing, China
  • 3Physicochimie des Processus de Combustion et de l’Atmosphère, Université de Lille 1, 59655 Villeneuve d’Ascq, France
  • 4Laboratoire d'Optique Atmosphérique, Université de Lille1, 59655 Villeneuve d’Ascq, France
  • 5ENVEA, 111 Boulevard Robespierre CS 80004, 78304 Poissy Cedex 4, France

A novel instrument based on broadband cavity enhanced absorption spectroscopy has been developed using a supercontinuum broadband light source, which showcases its ability in simultaneous measurements of the concentration of NO2 and the extinction of particulate matter (PM). Side-by-side intercomparison was carried out with the reference NOx analyzer for NO2 and OPC-N2 particle counter for particulate matter, which shows a good linear correlation with r2 > 0.90. Measurement limits (1σ) of the developed instrument were experimentally determined to be 230 pptv in 40 s for NO2 and 1.24 Mm-1 for the PM extinction in 15 s, respectively.

This work provides a promising method in simultaneously monitoring atmospheric gaseous compounds and particulate matter, which would further advance our understanding on gas-particle heterogeneous interactions in the context of climate change and air quality.

Experimental details and the preliminary results will be discussed and presented.


The authors thank the financial supports from the French national research agency (ANR) under the MABCaM (ANR-16-CE04-0009), the CaPPA (ANR-10-LABX-005) contracts, the CPER ECRIN program, and the EU H2020-ATMOS project.

How to cite: Chen, W., Wang, G., Meng, L., Gou, Q., Hanoune, B., Crumeyrolle, S., Fagniez, T., Coeur, C., and Akiki, R.: A Broadband Cavity-Enhanced Absorption Spectrometer for Simultaneous measurements of NO2 and particulate matter, EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-12051,, 2023.