Articles | Volume 16, issue 24
https://doi.org/10.5194/amt-16-6097-2023
https://doi.org/10.5194/amt-16-6097-2023
Research article
 | 
20 Dec 2023
Research article |  | 20 Dec 2023

An open-path observatory for greenhouse gases based on near-infrared Fourier transform spectroscopy

Tobias D. Schmitt, Jonas Kuhn, Ralph Kleinschek, Benedikt A. Löw, Stefan Schmitt, William Cranton, Martina Schmidt, Sanam N. Vardag, Frank Hase, David W. T. Griffith, and André Butz

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Cited articles

Bai, M., Flesch, T., Trouvé, R., Coates, T., Butterly, C., Bhatta, B., Hill, J., and Chen, D.: Gas Emissions during Cattle Manure Composting and Stockpiling, J. Environ. Qual., 49, 228–235, https://doi.org/10.1002/jeq2.20029, 2020. a
Bailey, D. M., Adkins, E. M., and Miller, J. H.: An Open-Path Tunable Diode Laser Absorption Spectrometer for Detection of Carbon Dioxide at the Bonanza Creek Long-Term Ecological Research Site near Fairbanks, Alaska, Appl. Phys. B, 123, 245, https://doi.org/10.1007/s00340-017-6814-8, 2017. a
Birk, M., Röske, C., and Wagner, G.: High Accuracy CO2 Fourier Transform Measurements in the Range 6000–7000 cm−1, J. Quant. Spectrosc. Ra., 272, 107791, https://doi.org/10.1016/j.jqsrt.2021.107791, 2021. a
Coddington, I., Newbury, N., and Swann, W.: Dual-Comb Spectroscopy, Optica, 3, 414, https://doi.org/10.1364/OPTICA.3.000414, 2016. a
Deutscher, N. M., Naylor, T. A., Caldow, C. G. R., McDougall, H. L., Carter, A. G., and Griffith, D. W. T.: Performance of an open-path near-infrared measurement system for measurements of CO2 and CH4 during extended field trials, Atmos. Meas. Tech., 14, 3119–3130, https://doi.org/10.5194/amt-14-3119-2021, 2021. a, b, c, d, e
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Short summary
Our new observatory measures greenhouse gas concentrations of carbon dioxide (CO2) and methane (CH4) along a 1.55 km long light path over the city of Heidelberg, Germany. We compared our measurements with measurements that were taken at a single point at one end of our path. The two mostly agreed but show a significant difference for CO2 with certain wind directions. This is important when using greenhouse gas concentration measurements to observe greenhouse gas emissions of cities.
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