| Issue |
EPJ Web Conf.
Volume 362, 2026
31st International Laser Radar Conference (ILRC 31) Held Together with the 22nd Coherent Laser Radar Conference (CLRC 22)
|
|
|---|---|---|
| Article Number | 09017 | |
| Number of page(s) | 4 | |
| Section | Lidar Measurements of Trace Gases (including Greenhouse Gases and Water Vapour) | |
| DOI | https://doi.org/10.1051/epjconf/202636209017 | |
| Published online | 09 April 2026 | |
https://doi.org/10.1051/epjconf/202636209017
Automated CO2 Profiling with Scanning Raman Lidar in the Lower Troposphere
Institute for Physics and Meteorology, University of Hohenheim, Stuttgart, Germany This email address is being protected from spambots. You need JavaScript enabled to view it.
Published online: 9 April 2026
Abstract
We have extended our automatic and continuously measuring ground-based Raman lidar ARTHUS (Atmospheric Raman Temperature and Humidity Sounder) with a CO2 channel. A narrow-band interference filter extracts the 2ν2 CO2 Raman line with 68 % peak transmission and 0.15 nm FWHM. We use a frequency-tripled Nd:YAG laser (200 Hz, 40 mJ in 2023, 100 mJ in 2024) and a 40-cm receiving telescope. With the current setup, we profile CO2, H2O and temperature as well as particle extinction coefficient and particle backscatter coefficient. We have operated this eye-safe system successfully in 2023 for several weeks at our university and continue to do so with a further improved system performance this spring. The first test measurements in 2023 achieved already uncertainties of <1.3 ppm at 1 km altitude with averaging of 4.4 h and 500 m at night.
© The Authors, published by EDP Sciences, 2026
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