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AMT | Articles | Volume 12, issue 8
Atmos. Meas. Tech., 12, 4149–4169, 2019
https://doi.org/10.5194/amt-12-4149-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
Atmos. Meas. Tech., 12, 4149–4169, 2019
https://doi.org/10.5194/amt-12-4149-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 01 Aug 2019

Research article | 01 Aug 2019

Recent improvements of long-path DOAS measurements: impact on accuracy and stability of short-term and automated long-term observations

Jan-Marcus Nasse et al.
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Cited articles  
Alicke, B., Platt, U., and Stutz, J.: Impact of nitrous acid photolysis on the total hydroxyl radical budget during the Limitation of Oxidant Production/Pianura Padana Produzione di Ozono study in Milan, J. Geophys. Res., 107, 8196, https://doi.org/10.1029/2000jd000075, 2002. a
Asaf, D., Tas, E., Pedersen, D., Peleg, M., and Luria, M.: Long-Term Measurements of NO3 Radical at a Semiarid Urban Site: 2. Seasonal Trends and Loss Mechanisms, Environ. Sci. Technol., 44, 5901–5907, https://doi.org/10.1021/es100967z, 2010. a
Axelsson, H., Galle, B., Gustavsson, K., Ragnarsson, P., and Rudi, M.: A transmitting/receiving telescope for DOAS measurements using retro-reflector technique, Optical Remote Sensing of the Atmosphere, OSA Technical Digest Series, 4, 641–644, 1990. a
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Bogumil, K., Orphal, J., Homann, T., Voigt, S., Spietz, P., Fleischmann, O., Vogel, A., Hartmann, M., Kromminga, H., Bovensmann, H., Frerick, J., and Burrows, J.: Measurements of molecular absorption spectra with the SCIAMACHY pre-flight model: instrument characterization and reference data for atmospheric remote-sensing in the 230–2380 nm region, J. Photochem. Photobiol. A-Chem., 157, 167–184, https://doi.org/10.1016/s1010-6030(03)00062-5, 2003. a, b, c
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We present several changes to the setup of long-path differential optical absorption spectroscopy (LP-DOAS) instruments, including the application of a laser-driven light source, a modified coupling of the measurement signal between components, improved stray-light suppression, and better signal homogenization measures. These changes reduce detection limits of typical trace-gas species by a factor of 3–4 compared to previous setups and enable automated long-term observations in Antarctica.
We present several changes to the setup of long-path differential optical absorption...
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